2026-03-05T07:45:49Z https://natural-b.ub.ac.id/index.php/natural-b/oai

oai:natural-b.ub.ac.id:article/141 2019-07-26T03:57:40Z natural-b:ART

Antimalarial Activity (Plasmodium falciparum 3D7) from Sea Sponge Acanthella sp. Ikram, faidzil Prihanto, Asep Awaludin Hanifah, Choiriyatun Iqbal, Muhammad Antimalarial, Plasmodium falciparum 3D7, Acanthella sp. The objective of the research was to get the bioactive candidates from marine sponge Acanthella sp. for anti multi resistant malaria. The first Research was conducted with isolating the active compounds of Acanthella sp. In vitro antimalarial test against Plasmodium falciparum 3D7 was done with several concentrations with positive control using chloroquinon the quantification of the Scizon inhibition was performed with blood staining. Afterward, the infected erythrocytes per 1000 erythrocytes was calculated. IC50 was assayed with probit analysis. The result indicated that all four active fractions showed inhibition on growth of P. Falciparum with different value on IC50. The best fraction is confirmed by fraction B with IC50 of 0.013 ppm. Natural B, Journal of Health and Environmental Sciences 2012-04-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/141 10.21776/ub.natural-b.2012.001.03.1 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 3 (2012); 196-199 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/141/129 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/141/38

oai:natural-b.ub.ac.id:article/333 2017-10-20T06:47:36Z natural-b:ART

Utilization of Medicinal Plants in Kayukebek Village, Tutur District, Pasuruan Regency Witjoro, Agung Sulisetijono, Sulisetijono Setiowati, Frida Kunti BIOLOGY ethnobotany of medicinal plants; utility value; Kayukebek Tutur Botany Traditional medicine using herbs has been known and done since the first generations by the people of Indonesia. Tutur area is located in the district of Pasuruan, East Java Province. One of the villages in the Tutur area is Kayukebek. The community Kayukebek have knowledge about the advantages of plants as a medicine for specific diseases or health problems. The study aims to: 1) To obtain information the types of plants used as a medicine; 2) To know the various uses of herbs; 3) To determine the perception and appreciation of the herbs from the Kayukebek community. This research is a descriptive explorative study. The method performed in the exploratory survey data collection by direct observation in the field and Participatory Rural Appraisal methods. Community engagement obtained through interviews with semi-structural and open-ended based question list. Sampling technique used is purposive sampling and snowball sampling. The value of the use of plants known by the value of Informant Concencus Factor and Use Value. The results, recorded 22 plants species have been used in this community as traditional medicine, include: garlic, tropong onion (scallion), plantain, dlingo, ceplukan, jambu wer, senggani, blencong, tamarind, kecubung, mustard greens, cabbage, fennel, turmeric, ginger, pulosari, sendokan, corn, white wood, sempretan (brojo lintang), gorogo, and wono ginger. It was observed that the local people are less aware of the medicinal plants. It is seen the public perception of the use medicinal plants is low (48.03%) meanwhile the appreciation medicinal plants are prefer to low category (49.69%). Natural B, Journal of Health and Environmental Sciences Faculty of Mathematics and Natural Sciences 2016-10-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article descriptive explorative application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/333 10.21776/ub.natural-b.2016.003.04.6 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 4 (2016); 304-310 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/333/pdf purposive sampling and snowball sampling Copyright (c) 2016 Natural B

oai:natural-b.ub.ac.id:article/194 2019-07-29T03:41:08Z natural-b:ART

Mathematical model of HIV / AIDS Transmission with Health Education Marsudi, Marsudi Wibowo, Ratno Bagus Edy HIV/AIDS, effective reproductive number, stability and sensitivity analysis. In this research has been carried out the stability analysis of HIV/AIDS epidemic model with a public health educational through the expansion of the SI (susceptible-infected) model. In modeling of HIV/AIDS epidemic, the population is divided into six subpopulations: uneducated susceptible individuals, educated susceptible individuals, uneducated infected individuals without AIDS symptoms, educated infected individuals with AIDS symptoms, uneducated infected individuals with AIDS symptoms and educated infected individuals with AIDS symptoms. The disease-free equilibrium point of the HIV transmission model with education program is locally asymptotically stable if the basic reproduction number is less than unity and unstable if the basic reproduction number is greater than unity. The endemic equilibrium point is exist if the effective reproduction number is greater than unity and stability of endemic equilibrium point has been determined using the Center manifold theory. The center manifold theory can be used to analyze the stability near the disease-free equilibrium point (the effective reproduction number is equal to unity). The impact of a public health education on the spread of HIV/AIDS, the sensitivity analysis on effective reproduction numbers respect to all the parameters which drive the disease dynamics.   Natural B, Journal of Health and Environmental Sciences 2013-05-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/194 10.21776/ub.natural-b.2013.002.01.7 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 1 (2013); 43-49 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/194/168 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/194/71

oai:natural-b.ub.ac.id:article/452 2019-06-20T08:32:58Z natural-b:ART

Analysis of The Distribution of Geothermal Potential and The Manifestations in Ijen Volcanic Complex Based on Land Surface Temperature and Geomorphology Cahyono, Bowo Eko Jannah, Nurfaizatul Suprianto, Agus geothermal; geothermal manifestations; land surface temperature; geomorphology; lineaments. Indonesia's geographical conditions which are at the confluence of three tectonic plates contribute to the availability of geothermal energy. The first step that can be taken in geothermal potential exploration activities is to study the characteristics of geothermal potential areas. In this case the study of the characteristics of geothermal potential will be carried out in the Ijen Mountains complex. This study aims to analyze the distribution of geothermal potential based on land surface temperature, and geothermal manifestations based on the association of land surface temperature and geomorphology. Remote sensing data used in the study were Landsat 8 images acquired in September 2013, 2015, and 2017. The results showed that geothermal potential areas were in the interior of the Ijen Mountains caldera with a temperature anomaly of 26-50 °C which was dominated by high greenish vegetation. While some geothermal manifestations that have been recorded are known to be associated with lineament that intersects with high land surface temperatures, so that the lineament that has the potential to be a fluid discharge pathway for geothermal manifestations is lineament that consistently intersects with high land surface temperatures in September 2013, 2015, and 2017 with the Southeast-Northwest and Southwest-Northeast orientations. Natural B, Journal of Health and Environmental Sciences 2019-04-29 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/452 Natural B, Journal of Health and Environmental Sciences; Vol 5, No 1 (2019); 19-27 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/452/pdf

oai:natural-b.ub.ac.id:article/245 2018-12-13T07:25:20Z natural-b:ART

Refugia Block Influence on Insect Pattern Visiting Polinator at Poncokusumo Apples Plantation, Malang Mustakim, Arif Laksono, Amin Setyo Kusuma, Zaenal Pollinatorsinsect; refuge block; diversity; daily variation. Pollination service in agroecosystems depends on several factors, including the land management systems used by farmers. The using of variety of wild plans as refugia area are expected to be an alternative habitat for pollinators insect in plants: Ageratum conyzoides, Ageratum hostionum, Commelina difussa and Capsicum frutescens This research aims to know the composition of pollinators insect visit of refuge block and analyze their patterns in apple plantation Poncokusumo village Malang. Direct observations of insect pollinators diversity, community structure insect pollinators and abiotic factors in Poncokusumo village. were conducted on August 2012 to December 2013. Sampling was taken in each refuge block in four times observation at 07.00, 09.00, 12.00 a.m. and 3.00 p.m. Analysis of potential insect pollinators of apple blossoms as obtained from the importance and value of diversity index (Shannon-Wiener). Bray Curtis Index was noted diversity index value of insect pollinators was 1,26. The similarity between refuge block was noted with Bray Curtis index of 0,93 %. Community structure of insect pollinators in refuge block dominated from genus Syrphidae (40) and Tabanidae (22). Analysis of environmental factors of temperature, humidity and light intensity on the abundance of insect pollinators showed a negative correlation with the R-square value of 64,7 %. Natural B, Journal of Health and Environmental Sciences 2014-04-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/245 10.21776/ub.natural-b.2014.002.03.7 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 248-253 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/245/202

oai:natural-b.ub.ac.id:article/280 2018-12-13T07:26:18Z natural-b:ART

Plankton Community at Segara Anak Lake Gunung Rinjani National Park Arianto, Taufik Bachtiar, Imam Japa, Lalu diversity; phytoplankton; zooplankton; Segara Anak Lake. Plankton community was studied at the Lake of Segara Anak, Lombok Island, Indonesia. The purpose of this study was to describe community structure of plankton and to explore spatial and temporal pattern. The results show there were 39 species of phytoplankton and 5 species of zooplankton. Species diversity and similarity indices of phytoplankton were 3.064 and 0.029 respectively, while the species diversity and similarity indices of zooplankton were 1.352 and 0.060 respectively. Statistical analysis showed no significant difference spatially and temporally on the species richness, abundance, diversity index and similarity index of zooplankton and phytoplankton. Significant difference was only found on the average of species richnes and diversity index of zooplankton between the surface and the bottom of the lake.  Natural B, Journal of Health and Environmental Sciences 2015-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/280 10.21776/ub.natural-b.2015.003.01.10 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 1 (2015); 069-080 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/280/237 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/280/126

oai:natural-b.ub.ac.id:article/310 2017-09-05T03:49:32Z natural-b:ART

Estimated Effective Dose Out of Fields in LINAC Radiotherapy Variant iX in Cervical Cancer Listuayu, Kadek Noor, Johan Bunawas, Bunawas LINAC; Cervix Cancer; Out of Field; TLD Linac operated at energies above 8 MV can result in photoneutron emissions arising from the interaction between high-energy photons striking the constituent materials such as collimator, the target and the scattering foil. This secondary radiation may increase the risk of secondary cancers and additional radiation dose received in addition to dose of photons. This study estimates the dose out of the field around cervix cancer in the form of an effective dose of neutron and photon. Measurements were carried out using termoluminescence (TLD) detector pairs, TLD 600 and TLD TLD 700. Neutron dose distribution was determined by placing the TLD pairs at 8 points scattered in the phantom.. Linac irradiations at a dose of 2 Gy were conducted three times that produced effective dose neutron range from 0.3 mSv to 4.8 mSv. While the effective dose photon as read by the TLDs range from 42.9 to 920.1 mSv.The effective dose of neutron and photon received were less for points located further away from the point of isocentre. Natural B, Journal of Health and Environmental Sciences 2016-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/310 10.21776/ub.natural-b.2016.003.03.05 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 3 (2016); 235-240 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/310/pdf Copyright (c) 2016 NATURAL B

oai:natural-b.ub.ac.id:article/184 2019-07-29T03:22:08Z natural-b:ART

Study on the Preparation and Liquid Smoke Fluids Characterization as the Results of Pyrolysis from Sawdust Sugiarti, Sri Nurhuda, M. liquid smoke, sawdust, pyrolysis, wood, density. There is a huge amount of biomass resources but it has not been utilized properly. For instance, converting it into liquid smoke. Liquid smoke is produced by pyrolysis process from four differences sawdust i.e. teak (Tectona grandis sp), mahagony (Switenia mahagoni jacq), jackfruit (Artocarpus heterophyllus lamk), and red sandalwood (Pterocarpus indicus). Pyrolysis process required 750-gram sawdust and performed for approximately 40 minutes.Percentage of liquid smoke production ranged from 26.51 ± 0.009% (mahagony) – 32.12 ± 0.009% (jackfruit). While, the charcoal produced ranged from 23.54 ± 0.008% (mahagony) – 34.76 ± 0.009% (jackfruit). The density value of liquid smoke produced ranged between 1014.996 ± 0.346 kg/m3 (mahagony) – 1019.408 ± 0.037 kg/m3 (teak). Natural B, Journal of Health and Environmental Sciences 2012-11-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/184 10.21776/ub.natural-b.2012.001.04.12 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 4 (2012); 370-376 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/184/159 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/184/61

oai:natural-b.ub.ac.id:article/417 2018-07-30T02:06:15Z natural-b:ART

Study of Thermal Neutron Flux and Generated Energy from Linac using CR-39 Detector in Liquid Medium Widyanti, Kurnia Nur Widodo, Chomsin S. Bunawas, Bunawas Linac, neutron, thermal neutron flux Linac surgery is required in radiotherapy activities. However, if Linac operated more than 8 MV can cause additional radiation of neutrons, as well as triggers forming secondary cancer. The study was conducted to determine the distribution of thermal neutron flux and energy responses on the trace. One method to detect neutrons is to use a nuclear trace detector. Measurements were made using a CR-39 detector coated with a Boron radiator. A number of detectors were placed on the surface of the sphere and entered into a 30×30×30 cm3 fantom. Irradiation is done by placing fantom under Linac gantry with 100cm SSD distance. After irradiation, then etching. The results of the measurements showed that the distribution of thermal neutron fluxes spread in all directions. Linac 10 MV neutron flux value varies, starting at 0° of 1,637×103 n/cm2.s and decrease at 135°of 1.285×103 n/cm2s. The highest Linac 15 MV at detector position 0° of 10.723x104 n/cm2.s and decreased at 135° of 5.142x104 n/cm2s. This proves that the farther from the source the less the thermal neutron flux value due to the collision process. While Linac 10 MV and 15 MV produce range of diameter ranging from 8.21-16.75 (μm) and 9.21-17.45 (μm), with energy response value 0.5-3.5 MeV. The larger the energy response, the smaller the diameter and vice versa, this is due to the effect of penetration on the depth of the distance resulting in smaller track. Natural B, Journal of Health and Environmental Sciences 2018-06-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/417 10.21776/ub.natural-b.2018.004.03.4 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 3 (2018); 145-152 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/417/pdf

oai:natural-b.ub.ac.id:article/227 2019-07-29T07:22:02Z natural-b:ART

Triterpenoid Fraction Antimalarial Activity Test from Methanol Extract Made by Leaf Artocarpus camansi Against Plasmodium Berghei by In Vivo Sucilestari, Ramadhani D J, Dwi Soelistya Bachtiar, Imam triterpenoids; antimalarial activity Malaria disease is still a serious health problem in Indonesia. This study aimed to determine the antimalarial activity of triterpenoid compound fraction of A. camansi leaf methanol extract to P. berghei of in vivo. This experiment of using research a completely randomize design (CRD) with four different doses (0.1 mg/kg BW, 1 mg/kg BW, 10 mg/kg BW, 100 mg/kg BW) and one negative control group (1 % CMC). The results show that triterpenoid compound fraction of A. camansi leaf methanol extract was effective to reduce parasite activity of P. berghei. The most effective dose was 100 mg/kg BW for three days with daily treatment after the mice was infected by parasite. Natural B, Journal of Health and Environmental Sciences 2013-12-12 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/227 10.21776/ub.natural-b.2013.002.02.16 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 2 (2013); 196-199 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/227/191 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/227/97

oai:natural-b.ub.ac.id:article/271 2018-12-13T07:26:18Z natural-b:ART

Aquatic Sediments Roles of Brantas Watershed Outlet on Availability of Ca2 +, Mg2 +, Na +, K + and Boron in Water Board as Irrigation Water Source Sandhika, I Made Gede Sudyadnyana Rumhayati, Barlah Atikah, Atikah Sediment; Ca; Mg; Na; K; and Boron. The role of aquatic sediment of outlet DAS Sumber Brantas for the availability of Ca2+, Mg2+, Na+, K+, and boron in water body has been investigated from July-September 2014. Sediment and water samples were collected from the outlet of Sumber Brantas watershed in Arboretum Sumber Brantas village, Batu. This research aim was to investigate the distribution and sediment role for availability of Ca, Mg, Na, K, and boron in water body. The research results show that Ca was the dominant metal ion that was found in water body, while in sediment metal ions that dominant were Ca and Mg. The concentration of metal ion Ca was highest in August with average of concentration 1105.51 ppm and concentration of metal ion Mg was highest in July with average of concentration 1038.94 ppm. Comparison for metal ions concentration in water and sediment shows that sediment had a greater role as a sink for metal ion Ca and boron, while the sediment was a source for metal ions Mg, Na, and K in water body.  Natural B, Journal of Health and Environmental Sciences 2015-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/271 10.21776/ub.natural-b.2015.003.01.1 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 1 (2015); 001-007 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/271/228 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/271/117

oai:natural-b.ub.ac.id:article/124 2019-07-29T03:53:06Z natural-b:ART

Opportunity of Applying Clean Production in UMKM (SMBs) Badminton Racket at Malang City Ismuyanto, Bambang badminton racket, anodization, rinse water, saving water, saving electricity Small medium enterprise badminton racket in Malang consume water wastefully. Rinse water discharged into river and causing pollution problem. In fact, rinse water can still be utilized. Rinse water can be reused for anodizing other racket. The results showed that the rinse water could be used five times and the impact on saving electricity and water resources. Rinse water used to anodize produced products that are not much different if the new rinse water is used. Natural B, Journal of Health and Environmental Sciences 2012-01-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/124 10.21776/ub.natural-b.2011.001.02.9 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 2 (2011); 153-157 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/124/121 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/124/27 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/124/28

oai:natural-b.ub.ac.id:article/164 2019-07-29T03:22:07Z natural-b:ART

Optimal Control Design of Eco-Friendly Power Generators Using Wind Power Nadhir, Ahmad Naba, Agus optimal control, wind energy, FIS, MPPT Two optimal control methods based on fuzzy inference system (FIS) for maximizing extraction of energy in wind energy conversion system (WECS) is already presented. An MPPTFIS is a first optimal control method using maximum power point tracking approach and fuzzy system. The objective of MPPTFIS is to make zero value change rate of power and rotor speed. A control system will drive an actuator to increasing or decreasing  the generator speed depend on the measurement rate of power and rotor speed. An optimal of WECS can be achieved by carried through the rate of power and rotor speed that operating near optimal point. The second optimal control method is proposed by using adaptive neuro fuzzy inference system (ANFIS) to finding model of power curve that will be applied for design of linear control feedback (LCANFIS). The advantage of LCANFIS than MPPTFIS is only one parameter measusrement needed: wind speed. MPPTFIS and LCANFIS could maximize extraction of the wind energy that verified by a power coefficient Cp stay at its maximum almost all the time and an actual power line close to a maximum power extraction (MPE) line reference during simulation process using a same of wind profile.   Natural B, Journal of Health and Environmental Sciences 2012-11-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/164 10.21776/ub.natural-b.2012.001.04.3 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 4 (2012); 312-317 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/164/146 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/164/45

oai:natural-b.ub.ac.id:article/407 2018-01-23T04:06:51Z natural-b:ART

Study of Stearic Acid Layer (SA) Microstructure on Surface Quartz Crystal Microbalance (QCM) Sensors Nurramdaniyah, Nurramdaniyah Padega, Masdiana Santjojo, Djoko Herry Sakti, Setyawan P. Masruroh, Masruroh Stearic acid layer, Morphology, Crystal structure, C-H In the development of QCM-based biosensor sensors, the sensor surface is a very important part because it determine how the surface interacting with its environment especially during the immobilization of biomolecules process. In the utilization of QCM as biomolecule detecting biosensor, it is necessary to coat the polymer material on the surface of QCM. A stearic acid layer is used as an immobilization matrix layer because stearic acid has both polar and non polar properties so it can interact with biomolecules. The stearic acid layer is deposited on the polystyrene surface using a vacuum evaporation method. A study of the microstructure of the stearic acid coating was conducted to determine the possibility of the deposited stearic acid layer used as the matrix layer. In this research, microstructural study of layers of the stearic acid by using Scanning Electron Microscope (SEM) was carried out to find out the surface morphology of stearic acid. X-Ray Difraction (XRD) measurements were conducted to identify the crystal structure of stearic acid while Fourier Transform Infrared (FTIR) measurements were used to determine the stearic acid functional group. The Scanning Electron Microscope (SEM) results show the surface of the cavity and pore layers of the polystyrene layer was coated with white fibers homogeneously deposited on the surface of QCM / Polystyrene. Furthermore, the X-Ray Difraction (XRD) results showing a spectrum peak at an angle of 2q = 26,66° indicates the existence of stearic acid crystals. Whereas, the measurement results of the Fourier Transform Infrared (FTIR) indicate the appearance of C-H functional groups at a wavelength value of 3600-2600 cm-1 which indicates the functionality of the stearic acid layer.  Natural B, Journal of Health and Environmental Sciences 2017-10-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/407 10.21776/ub.natural-b.2017.004.02.4 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 2 (2017); 105-110 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/407/pdf Copyright (c) 2017 Natural-B

oai:natural-b.ub.ac.id:article/217 2019-07-29T07:22:02Z natural-b:ART

Effect of Redox Time on Carbon Based Purity Made from Coconut Shell Simple Carbonization Asrori, Zain Nuriyah, Lailatin H Santjojo, Djoko Masruroh, Masruroh carbon; coconut shell; redox; time optimization Purification of carbon from coconut shell has been done by redox reaction method. Carbon was produced with simple heating carbonization method at 700 °C. Oxygen reduction process from the carbon was carried at temperature of 350 °C for 200 mL/min and 300mL/min with the H2 flow rate for 60 min, 120 min, and 180 min. Synthesis of carbon through simple heating carbonization method obtaining (93.84 ± 2.21) % of carbon content. Redox time optimization method successfully increased levels of carbon purity up (97.87 ± 1.47) %. The increase in carbon content was caused by the loss of a functional group with carbon-oxygen bond (C-O) and sulfur (S-O), as evidenced from FTIR test results. Natural B, Journal of Health and Environmental Sciences 2013-12-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/217 10.21776/ub.natural-b.2013.002.02.7 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 2 (2013); 140-144 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/217/182 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/217/89

oai:natural-b.ub.ac.id:article/258 2018-12-13T07:25:35Z natural-b:ART

Studies on the Effect of Pollutant Waste on Free Radical Content in Tilapia Gill Organs (Oreochromis Niloticus) Berlianti, Nindha A. Widodo, Chomsin S. Juswono, Unggul P. free radical; heavy metal; ESR; Oreochromisniloticus’s organ Studies on the effect of heavy metal pollution on the appearance of free radicals in aquatic biota has been done by applying heavy metals Pb, Cd and Hg in tilapia fish (Oreochromis Niloticus). Free radicals research was done to organ of tilapia gills using ESR. The result showed that the concentration of Pb Nitrate 0.2 ppm – 1.4 ppm, Cd Nitrate 0.02 ppm – 0.14 ppm and Hg Nitrate 0.006 ppm – 0.018 ppm could improve free radical O2-. Free radicals concentration in organ of tilapia gills will increase with increasing concentration of heavy metals. Natural B, Journal of Health and Environmental Sciences 2014-10-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/258 10.21776/ub.natural-b.2014.002.04.10 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 4 (2014); 355-359 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/258/220 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/258/111

oai:natural-b.ub.ac.id:article/114 2019-07-29T03:50:55Z natural-b:ART

Determining Effective Dose on Computed Tomography Scan (CT SCAN) in Head Scanning Yuana, Firdi Kusno, Kusharto Hidayat, Achmad CT scan of the head, the effective dose, DLP Computed Tomography Scan (CT scan) is a diagnostic tool that has very high information. CT scan image is the result of a computer reconstruction of X-ray images. CT scans are widely used to diagnose the disease in and the most commonly used is a CT scan of the head. Impact of CT scan radiation causes direct effects and effects for the patient further. This study aims to determine the effective dose in CT scan of the head at the hospital dr. Scan Soepraoen with Impact software in accordance with the International Commission of Radiological Protection (ICRP). From the results of research conducted on 100 patients showed that the CT Scan Head Dose Length Product (DLP) male patients on average larger of 576 mgy / cm when compared with female patients DLP is 506 mgy / cm. The occurrence of this difference is influenced by the length of the exposure area in male patients on average larger than female patients. There are differences in the calculation of effective dose using ICRP Impact Scan for 103 and ICRP 60. To obtain the value of ICRP 103 1.20 mSv to 1.40 mSv, while for the ICRP 60 values obtained 1.20 mSv. These differences ranged from 0% to 16.7%. This is because the ICRP organ weighting factor 103 larger than the ICRO 60. In addition, the ICRP 60 value Dose Limit (NDB) was not reckoned with the dose derived from medical activity. Difference occur in the calculation of the value of effective dose using ICRP Impact Scan for 103 and ICRP 60. To obtain the value of ICRP 103 1.20 mSv to 1.40 mSv, while for the ICRP 60 values obtained 1.20 mSv. These differences ranged from 0% to 16.7%. This is because the ICRP organ weighting factor 103 greater than the ICRP 60. The results of this study obtained the value of effective dose CT scan of the head in accordance with international standards. This research is also a step synergistic cooperation between the hospitals with UB's Department of Physics. Natural B, Journal of Health and Environmental Sciences 2011-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/114 10.21776/ub.natural-b.2011.001.01.11 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 1 (2011); 81-86 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/114/112 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/114/16

oai:natural-b.ub.ac.id:article/295 2018-12-13T07:26:31Z natural-b:ART

Effect of Gamma Radiation and Temulawak Extract (Curcuma xanthorrhiza) on HAART Levels of Mice Mice (Mus musculus) Sari, Septiana K. Widodo, Chomsin S. Juswono, Unggul P. Liver; Gamma Radiation; SGPT; Curcuma xanthorrhiza Gamma radiation can causes cells damage, because the interaction between radiations with cells can produce free radical. The compound that can neutralize and catch free radical is called antioxidant. The objectives of this research were to analyze influence of gamma radiation and Curcuma xanthorrhiza extract to the SGPT level to the mice’s liver. This research uses eighty mices and they were divided into three group, negative control (K-), radiation non extract (R-) and extract plus radiation (R+). The doses of treatment of Curcuma xanthorrhiza extract are 1.4 gr/kg body weight; 2.0 gr/kg body weight; 2.6 gr/kg body weight; 3,2 gr/kg body weight and 3.8 gr/kg body weight, while the exposure of gamma radiation are given during 10 minutes, 20 minutes, 30 minutes, 40 minutes and 50 minutes. The measuring of SGPT level in mice’s serum is done by using blood analyzer. The results showed that free radical can damages liver cells and breaks cell wall, so SGPT level in blood to be high. In a row of increasing of Curcuma xanthorrhiza extract dose, then SGPT level to be low.  Natural B, Journal of Health and Environmental Sciences 2015-11-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/295 10.21776/ub.natural-b.2015.003.02.12 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 2 (2015); 182-186 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/295/251

oai:natural-b.ub.ac.id:article/152 2019-07-26T03:57:40Z natural-b:ART

Insecticide Effects on Membrane Potential of Catfish Egg Cell (Clarias batrachus) Juswono, Unggul Punjung Kusharto, Kusharto Cahyati, Yeni Latifah, Risalatul membrane potential; egg cells; insectiside Pollution has been occured in our environment due to daily life waste, industrial and using of peptiside in agroindustrial farm. Over usuage and dose of peptiside could be harmfull to the farm environment especially for fish farm. Measurement of membrane potential of fish egg cells is a simple metode to investigate water polution level. Membrane potential of fish egg cells can be measured using microelectrode probe which is connected to an electrometer. The changing of membrane potential value indicate the level of water polution. Variation of peptiside concentrations cause the changing of potential membrane value. Increasing of peptiside concentration cause decreasing of potential membrane. Its may due to some blocking of channel and other protein by peptiside molecule so the permeability of membrane to ions is decrease. The results of our experiment show that the increasing of peptiside concentration cause decreasing of the membrane potential value. For peptiside concentration of  0.4% decrease potential membrane to -28 ± 5 mV. It means that the increasing peptiside concentration cause significanly decrease in potential membrane which may be used for prediction of water polution level. Natural B, Journal of Health and Environmental Sciences 2012-06-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/152 10.21776/ub.natural-b.2012.001.03.9 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 3 (2012); 248-253 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/152/136

oai:natural-b.ub.ac.id:article/372 2018-12-13T07:27:17Z natural-b:ART

Analysis of Experimental Results Measurement of Electric Impedance Value on Liquid with Injection Flow on Parallel Plate Salamena, Gianita Anastasia Abdurrouf, Abdurrouf Santoso, Didik Rahadi Electrical impedance; parallel plate; current injection method This paper discusses the results of experimental measurement of the electrical impedance of liquids in parallel and perpendicular position to the direction of current injection. Experiments carried out on three different types of liquid i.e. distilled water, mineral water, and milk. Each liquid is placed in a container box with volume of 2,5cm x 2,5cm x 2,5cm. The electrode is located in the middle of the upright side of the container, forming two pairs of parallel plates, where one pair of parallel plate will serve as the current electrode. Current signal frequency range used in this experiment is 1Hz-500Hz. Experimental results obtained some things such as each liquid has a different electrical characteristic, distilled water has much larger electrical impedance compared to the mineral water and milk. Area of the electrode affects the measured impedance values on each liquid; the larger area of the electrode will decrease impedance value. The position of the electrode against the direction of flow injection showed the difference in impedance values measured, where the impedance measured at liquid injection electrode direct current is greater than the value of the impedance measured at liquid electrodes perpendicular injection current. Natural B, Journal of Health and Environmental Sciences 2017-04-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/372 10.21776/ub.natural-b.2017.004.01.4 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 1 (2017); 31-36 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/372/pdf Copyright (c) 2017 Natural B

oai:natural-b.ub.ac.id:article/200 2019-07-29T03:41:08Z natural-b:ART

Growth of Probiotic Bacteria (Bifidobacterium bifidum and Lactobacillus plantarum) in Medium Mixed Taro Rope (Colocasia esculenta L. Schott var Boring) and Soybean Powder Kusnadi, Joni Pratiwi, Kartika Cahyania probiotics, fermentation medium, soybean powder, taro flour, Bifidobacterium bifidum, Lactobacillus plantarum This study was aimed to determine the effect of mix proportions of soy powder and taro flour on the growth of probiotic bacteria Bifidobacterium bifidum and Lactobacillus plantarum. The experiments were performed using a randomized block design with two factors: the proportion of taro flour: soybean powder on the fermentation medium (6%: 9%, 7.5%: 7.5%, and 8%: 7%) and type of probiotic bacteria (B. bifidum and L. plantarum) with 3 replications. The results showed that treatment of taro flour and soybean powder on fermentation medium significantly (α = 0.05) decrease the degree of acidity (pH). While the treatment of probiotic (B. bifidum and L. plantarum) isolates significantly (α = 0.05) increase the total BAL, reduced the degree of acidity (pH), decreased total sugar and starch content. There is no interaction between the two treatments. The best treatment was obtained from the proportion of taro flour fermentation medium: soybean powder of 8%: 7% for L. plantarum isolates with the total L. plantarum of 4,24x1010CFU/ml, the degree of acidity (pH) of 3.32, and total sugar and starch content of 19.29%, 6.53%, respectively. Natural B, Journal of Health and Environmental Sciences 2013-05-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/200 10.21776/ub.natural-b.2013.002.01.12 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 1 (2013); 81-87 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/200/173 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/200/76

oai:natural-b.ub.ac.id:article/465 2020-06-03T07:29:35Z natural-b:ART

Pengaruh Peningkatan Kualitas Data Magnetotelurik di Pulau Muna dan Sekitarnya Berdasarkan Analisis Koherensi Terhadap Pemodelan 2D Junursyah, Gusti Muhammad Lucki Salsabil, Dimas Hanif Mirnanda, Eddy magnetotelluric method; coherence analysis; curve trend analysis; penetration depth analysis Penelitian di daerah Pulau Muna dan sekitarnya telah banyak dilakukan sebelum tahun 2011, karena merupakan bagian dari cekungan sedimen frontier yang berpotensi mengandung hidrokarbon. Secara regional, bagian permukaan daerah ini didominasi oleh batugamping Formasi Wapulaka berumur Kuarter sehingga untuk mengetahui sebaran batuan yang lebih tua sangatlah sulit dilakukan, oleh sebab itu diperlukan penelitian menggunakan metode geofisika yang salah satunya adalah metode Magnetotelurik (MT) untuk dapat menafsirkan kondisi geologi bawah permukaan (>1 km) berdasarkan sifat kelistrikan batuan. Metode MT merupakan metode geofisika pasif dengan mengukur medan listrik dan magnet alam di permukaan, sehingga akan dipengaruhi oleh banyak gangguan (noise). Analisis koherensi pada data MT termasuk didalamnya proses Robust, analisis deret waktu, dan edit XPR dilakukan untuk mereduksi gangguan tersebut sehingga dapat meningkatkan kualitas data dari 53,9 – 79% menjadi 80,1 – 95,1% atau meningkat sebanyak 15,7% - 32,1%. Analisis trend kurva dan kedalaman penetrasi pada hasil koherensi memperlihatkan bahwa gangguan dapat tereduksi secara keseluruhan tetapi tidak pada kondisi geologi bawah permukaan yang sangat konduktif. Natural B, Journal of Health and Environmental Sciences 2019-10-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/465 Natural B, Journal of Health and Environmental Sciences; Vol 5, No 2 (2019); 049-058 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/465/pdf

oai:natural-b.ub.ac.id:article/250 2018-12-13T07:25:20Z natural-b:ART

The Combination Effect of Vitamin C and E on the Number of Hemoglobin, Leukocyte and Platelet Post-Irradiation of Gamma Ray Prisyanto, Roni Santoso, Didik R Juswono, Unggul P Cahyati, Yeni radiation; hemoglobin; leukocyte; platelet; free-radical Radiotherapy is an alternative treatment for cancer patients to inhibit and destroy cancer cells due to the ionization. Gamma rays ionize not only cancer cells but also damage healthy cells due to precence of free radicals produced by ionizing gamma rays when interacting with biological material. The decrease in blood cells as ie hemoglobin, leukocytes and platelets caused free radicals can be minimized by administering antioxidant vitamins C and E. This study was conducted to determine the effects of gamma radiation exposure to the decrease in hemoglobin blood cells, leukocytes and platelets of mice after administration of a combination of antioxidant vitamins C and E in five variations, namely 10 mg dose: 1μl, 15 mg: 1.5 μl, 20 mg: 2 μl, 25 mg: 2.5 μl, 30 mg: 3 μl. Exposure of gamma radiation was given fractionation ranging from 200 rads to 1000 rads. Blood was taken from the heart for hemoglobin, leukocytes and platelets tests. The results showed that the administration of vitamins C and E may reduce the decline in hemoglobin levels, leukocytes, platelets resulting from exposure to gamma radiation when compared to the control group or without vitamin. Natural B, Journal of Health and Environmental Sciences 2014-04-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/250 10.21776/ub.natural-b.2014.002.03.14 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 289-295 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/250/209

oai:natural-b.ub.ac.id:article/101 2019-07-29T03:50:54Z natural-b:ART

Mechanical Properties Characterizations of Cassava Starch using Glycerol and Sorbitol Plasticizer Nuriyah, Lailatin Jazimah Iswarin, Siti Wiyono, Wiyono bioplastic, biopolymer, blending, strain and stress Bioplastic is a kind of plastic that biodegradable, and is made from renewable materials. This experiment has been intended to produce bioplastic from biopolymer such as: cassava flour, gelatin, jelly, with glycerol and sorbitol plasticizers.  The basic materials (flour, gelatin, and jelly) compared to plasticizer is 3:2. The first sample is made with various amounts of gelatin and cassava flour, with a certain amount of plasticizer; the second sample is made with basic material are fixed, and plasticizer are varied. Syntheses were done by blending method at 90 °C. The mixing is done until the solution is homogeny, and then casting into the caster. The characterization mechanical test includes strain and stress with prior heating at 5°C, 25 °C and 45 °C. Strain test maximum is 2,456 N/mm2 for sample K3-L with prior heating at 45°C, and maximum stress of 115 % for sample K5-L at 25 °C.  The Influence of variation of flour, gelatin, sorbitol and glycerol to tension is not predictable. Natural B, Journal of Health and Environmental Sciences 2011-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/101 10.21776/ub.natural-b.2011.001.01.3 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 1 (2011); 21-26 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/101/97

oai:natural-b.ub.ac.id:article/286 2018-12-13T07:26:31Z natural-b:ART

Effect of Sintering Temperature on Percentage of Tetragonal And Rhombohedral On Comparison of Zr / Ti (60/40) Abimanyu, Tamam Triandi, Rachmat Masruroh, Masruroh PZT; sol-gel technique; spin coating; sintering; zirconium nitrate The synthesis of lead zirconate titanate (PZT) with ratio Zr:Ti of 60:40 have been conducted by sol gel method. The precursor of PZT were prepered from zirconium(IV) nitrate pentahydrate, titanium(IV) butoxide, lead(II) acetate trihydrate and 2-methoxyethanol and acetylaceton as a stabilizer solution. The PZT films deposited on Si substrate by spin coating method, then it was sintered at different temperature of 500°C, 600°C and 700°C. The crystal structure and composition of PZT films were observed by X-ray Diffraction (XRD) and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX). The XRD results show the crystal orientation of PZT (100), (101), (110), (111), (002)T, (200)R, (200)T, (201) and (210), means that all PZT films are polycrystalline. Moreover, the orientation of (110) as temperature sintered of 600°C show the highes intensity than other temperature. The EDX results show mole fraction of Zr and Ti decrease compound with iniatial precursor. On the other hand, the mole fraction of O increase, which result in the existence of ZrO2 and TiO2 crystal.  Natural B, Journal of Health and Environmental Sciences 2015-11-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/286 10.21776/ub.natural-b.2015.003.02.3 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 2 (2015); 117-123 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/286/242

oai:natural-b.ub.ac.id:article/332 2017-10-09T08:50:28Z natural-b:ART

Environmental Geological Condition and Ground Water Bearers Relationship on Kebakalan Area, Kebumen - East Java Mareta, Nandian Hidayat, Edi Geologi Geologic Environment; ground water; Kebakalan; Karanggayam; CAGK; ground water level; dug Geologis Kebakalan and sorrounding included in area of Karangsambung Geological Natural Preservation (CAGK). As part of CAGK, geology Kebakalan and sorrounding area including Luk Ulo Melange Complex age Pre Tertiary expose in Java. These rocks are composed of scaly clay matrix with component in the form of block of igneous, sedimentary and metamorphic rocks. Many human activities is never separated from water using. These condition make that a region can maintain the quality and quantity of water resources. Avalaibility water resources of an area should be able to meet the water needs to water expected so balancing of two is happened. Rapid population growth in Kebakalan can increase needs for water resources for fullfillment of their needs. Water resources consist of surface and subsurface water (groundwater). The main purpose of these study is to determine the relationship between geology and groundwater conditions in Kebakalan and sorrounding an effort to overcome the droughts that frequently hit the area. The research method used two approaches that are primary and secondary data collection. The results showed there were eight units of geologic environments, in which two units are units hills sloping sandstone and alluvium plains unit is a good rock as aquifers. While the direction of groundwater flow from north to south with a depth of 4-8 m wells and groundwater levels 55-70 m. The villages that have potential for shallow ground water is Kedungnangka, Jambekerep, Jombor Kidul, Polaman, Panunggalan, Kebakalan and Gagakbaning with an area 462 ha (44%). Natural B, Journal of Health and Environmental Sciences 2016-12-09 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article pengumpulan data primer mapping, pengumpulan data sekunder application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/332 10.21776/ub.natural-b.2016.003.04.2 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 4 (2016); 277-285 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/332/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/332/139 Kebakalan, Karanggayam, Kebumen, Jawa Tengah Penelitian tahun 2015 litologi dan sumur gali penduduk Copyright (c) 2016 Natural B

oai:natural-b.ub.ac.id:article/190 2019-07-29T03:41:08Z natural-b:ART

Safety Analysis of Stacy's Critical Territory Criticality with Monte Carlo Transport Calculations Zuhair, Zuhair criticality, uranyl nitrate solution, STACY, cylindrical core, MCNP-4C, MCNPX A set of experiment has been done at STACY facility and many fundamental parameters of uranyl nitrate solution have been found out. Criticality is one of main parameters in predicting neutronic characteristic of STACY experiment beside solution level reactivity, void reactivity, kinetic parameter and temperature reactivity which dominates transient phenomenon in abnormal condition. Criticality experiment performed at STACY core uses 9.97% 235U -enriched uranyl nitrate solution with 80-cm-diameter cylindrical and 150-cm-height tank. Eight critical configurations in unrelected and water-reflected conditions were selected in this paper for criticality safety calculation with Monte Carlo transport code MCNPX. For all configurations, MCNPX calculations show good consistency with the trend of producing underestimated keff. Calculation biases with experimental data (keff = 1) for water-reflected configurations, i.e. 0.01-0.18%, were slightly better than those of unreflected configurations (0.14-0.41%). MCNPX calculation results which are better than the prediction of MCNP-4C concludes that MCNPX is more eligible to be applied to criticality safety analysis of uranyl nitrate solution in commercial nuclear fuel cycle facility. Natural B, Journal of Health and Environmental Sciences 2013-05-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/190 10.21776/ub.natural-b.2013.002.01.3 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 1 (2013); 12-18 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/190/164 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/190/67

oai:natural-b.ub.ac.id:article/431 2018-12-13T07:19:56Z natural-b:ART

Tensile Strength and Elongation Characteristics of Bioplastics Made from Cilembu Sweet Potatoes Starch with Various Types of Plasticizers Nuriyah, Lailatin Saroja, Gancang Ghufron, Muhammad Razanata, Arvi Rosid, Nova Fathur bioplastic; starch of Cilembu sweet potato; plasticizer; glycerol; sorbitol; egg white Nowadays, many researchers are doing research in the field of degradable plastics with replacing synthetic polymers with natural synthetics for resulting the bioplastics. A natural raw that often used by the researcher is starch. For producing the bioplastic, the starch is mixed with plasticizers. The aims of this research are for observing the influences of the plasticizer to the tensile strength and elongation of bioplastic that made from the starch of Cilembu sweet potato. The plasticizers that used in this research are glycerol, sorbitol, and egg white. The bioplastics are produced in four stages, such as starch producing, heating and adding of the plasticizers, casting, and measuring the tensile strength and elongation. In the producing process of starch, firstly, the potato was destroyed, then it was blended with fresh water, after that it was settled down, followed by filtering and drying. The next stage was heating and adding of the plasticizers. The process of glycerol and sorbitol adding did at 45 oC while the heating process performed until gelatinization temperature was reached. However, while using egg white as a plasticizer, the process was started at 50 oC. After that, the casting stage was done, followed by the last stage, the testing of bioplastic samples. The results of the experiment show that the variation of the plasticizer affects the tensile strength and elongation of the bioplastic. The addition of plasticizer as many as 2,8% reduces the tensile strength of the bioplastic by 90% for glycerol and 75% for sorbitol. Whereas with the addition of the egg white, the tensile strength of the bioplastic is increased to 49%. For elongation property of the bioplastic, both glycerol and sorbitol as many as 2,8% will decrease the elongation value 32,8% and 16,1% respectively. However, the elongation values of the bioplastic fluctuated for the white egg plasticizer. Natural B, Journal of Health and Environmental Sciences 2018-12-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/431 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 4 (2018); 177-182 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/431/pdf

oai:natural-b.ub.ac.id:article/242 2018-12-13T07:25:20Z natural-b:ART

Prediction of Structure Pouch Magma Volcano Kelud Gravity Data Based Method Using Equivalent Point Mass Ariyanto, Sandy Vikki Sunaryo, Sunaryo Susilo, Adi Kelud volcano; magma pocket; gravity; density; equivalent point mass The observation has been done by gravity method on the date of 1 July to 12 August 2012 in the Kelud volcano area, Pare, Kediri, Blitar and Ngantang in order to determine the structure of magma pocket. Data analisis from field measurements performed with the following correcting the data includes: convert to mgal, drift correction, tidal correction, latitude correction and topography correction, then obtained a complete Bouguer anomaly values. Subsequently projected onto a flat surface (Damnpey) by using matlab program and resolve regional anomalies with anomaly residual. Qualitative interpretation is done by reading the complete Bouguer anomaly contour pattern, while the quantitative interpretation is done by creating a 2D cross section on the four A-A’, B-B’, C-C’, and D-D’ lines.Based on projection to the flat surface (Dampney) with equivalent field depth of 3500 and equivalent field height of 200 obtained convergent anomaly contour so that anomaly values become stable, based on quantitative interpretation 2D cross section model of A-A’, B-B’, C-C’ and D-D’ lines and describing structure of magma pocket. Slice anomali density contrast of A-A’ at  -2,930 gr/cm3 assumed as magma chamber with 900 meter dept while B-B’ slice at -2,910 gr/cm3assumed as magma chamber with 943 meters dept, C-C’ slice at -2,930 gr/cm3 assumed as magma chamber with 914 meters depth, and D-D’ slice at -2,930 gr/cm3 assumed as magma chamber with 943 meters depth.  Natural B, Journal of Health and Environmental Sciences 2014-04-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/242 10.21776/ub.natural-b.2014.002.03.4 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 229-234 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/242/198

oai:natural-b.ub.ac.id:article/276 2018-12-13T07:26:18Z natural-b:ART

Estimation of Seepage Zone at Bajulmati Dam, Banyuwangi Regency Based on Litology Analysis Using Magnetic Data Rahmah, Hanna Azizah Susilo, Adi Rachmansyah, Arief Lithology; seepage; cracks; and magnetic method A research regarding seeping in Bajulmati Dam of Banyuwangi Regency based on lithology analysis by geomagnetic data has been done to discover the location of zone with seeping potential. This research is done by analyzing lithology from magnetic data (primary data) that was acquired from the field that covers the area of Bajulmati Dam. The research began with the acquisition of magnetic data using PPM (proton procession Magnetometer). Acquired data is then corrected by diurnal and IGRF correction, reduction in to even surface, upward continuation as well as reduction to the pole. Local anomaly contour is acquired with the value ranging from -1000 nT up to 700 nT at loop 1 and ranging from -2800 nT up to 1600 nT at loop 2. Based on the result of data processing by magnetic method, the subsurface layers beneath the said dam consist of the layer of clay (tuff), sandstone, gravel, and volcanic lava. By analyzing the mentioned results, some cracks are located in AA’ line with the measurement point of 20 m and 90 m, and in the 120 m and 160 m, 80 m and 100 m measurement point of BB’, and CC’ line respectively. Those cracks can be expected to cause seepage in Bajulmati Dam.  Natural B, Journal of Health and Environmental Sciences 2015-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/276 10.21776/ub.natural-b.2015.003.01.6 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 1 (2015); 044-052 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/276/233 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/276/122

oai:natural-b.ub.ac.id:article/129 2019-07-29T03:53:06Z natural-b:ART

Geoelectrical Tomography of Cangar Hot Springs Area, Arjuno-Welirang Complex Stone Rakhmanto, Fajar Maryanto, Sukir Susilo, Adi Tomography, geoelectric, geothermal, Arjuno-Welirang, Cangar, VES, Mapping Have been research geothermal of Arjuno Welirang area of East Java with geoelectric resitivity tomography. Geoelectric tomography was performed by VES (Vertical Electrical Sonding) and Mapping. Acquisition of data totaled 7 points of VES and 4 tracks Mapping was located surrounding the hot springs.Results of geoelectric resistivity modeling showed the resistivity of rock layers the carrier fluid (water) heat <10 Ohm.meter, while a layer of carrier fluid (water) was worth 10-100 Ohm.meter. The hot fluid coming from the direction of CR4 and CR3 are located in the south from the hot springs with a depth of 24.7 meters from the ground CR 3 (see Figure 5) which alleged a layer of sand, with layers of lava rock in the form of heat source at depth 34 meters. Mapping the results of modeling that consists of 4 tracks show around hot springs artifacts crack / crack is suspected as a medium to hot water flow out of the ground surface, precisely located at CANGAR_LINE1. Natural B, Journal of Health and Environmental Sciences 2012-01-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/129 10.21776/ub.natural-b.2011.001.02.14 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 2 (2011); 188-195 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/129/126 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/129/36

oai:natural-b.ub.ac.id:article/299 2017-09-05T03:49:32Z natural-b:ART

Preparation of Chitosan-Fe3O4 Nanoparticles by In-situ Co-Precipitation Using Tripolyphosphate / Citrate as Crosslinker and Characterization Using XRD Mardila, Vita Tria Sabarudin, Akhmad Santjojo, Djoko Herry magnetic nanopartikel; chitosan-Fe3O4; in-situ; co-precipitation Chitosan-Fe3O4 nanoparticles have been synthesized in a one pot reaction by combine TPP: citrate as crosslinker. The method was in-situ co-precipitation of iron salts in the presence of chitosan and crosslinker. The aim of this study was to determine the effect of preparation process towards chitosan-Fe3O4 nanoparticles characteristics which was prepared on several preparation condition: chitosan:Fe(II):Fe(III) ratio, TPP:citrate ratio, and crosslinking time. The crystallite sizes of the Fe3O4 and chitosan- Fe3O4 nanoparticles was obtained from modified Debye Scherrer equation using data from XRD analysis. The crystallite size of the bare-Fe3O4 and chitosan-Fe3O4 nanoparticles were found to be about 6.22 and 9.49 nm, respectively. XRD analysis results shown that beside Fe3O4 phases there was γ-Fe2O3 phase due to the oxidation of Fe3O4.The crystallite sizes and the percentage of Fe3O4 decreases with increasing number of chitosan coating the Fe3O4 and the length of crosslinking time Natural B, Journal of Health and Environmental Sciences 2016-09-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/299 10.21776/ub.natural-b.2016.003.03.02 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 3 (2016); 213-219 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/299/pdf Copyright (c) 2016 NATURAL B

oai:natural-b.ub.ac.id:article/179 2019-07-29T03:22:08Z natural-b:ART

Filler Composition Effects on Tensile Strength And Composite Material Toughness of Rice-Resin Husk Powder Istiroyah, Istiroyah Nuriyah, L. Retnowati, Retnowati composite, filler, tensile strength, toughness The rice husk flour- resincomposite has been made. This research aims to make the rice husk flour - resin composite and analyze the effect of filler composition to their tensile strength and toughness. The filler composition used is 0%, 10%, 20%, 30, 40%, 50% dan 60%. The Results of tensile test show that the best tensile strength is 113.02 ±11.60 MPa for polystiren sample. The best toughness with impact test is 47.92±0,36 KJ/m2 for 30% filler with polyester resin. Natural B, Journal of Health and Environmental Sciences 2012-11-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/179 10.21776/ub.natural-b.2012.001.04.8 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 4 (2012); 348-351 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/179/153 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/179/57

oai:natural-b.ub.ac.id:article/345 2018-01-23T04:07:54Z natural-b:ART

The Effect of Smoking Behavior in the Human Population Growth of Lung Cancer Patients Wardah, Lu’luul Trisilowati, Trisilowati Kusumawinahyu, Wuryansari Muharini Applied mathematics; mathematical biology dynamical analysis, active smokers, passive smokers, lung cancer This article discusses a model of lung cancer as the effect of smoking behavior on both active and passive smoker. There are four subpopulations in this model, namely susceptible subpopulation, active smoker subpopulation, passive smoker subpopulation, and subpopulation of lung cancer.  Dynamical analysis is conducted to determine the equilibrium point, existence condition for equilibrium point, and analyze their stability. Based on analysis result, there are three equilibrium points. First equilibrium point shows that all subpopulations extinct. Second equilibrium point shows that only susceptible subpopulation can survive, and the last equilibrium point shows that all subpopulations can survive. First equilibrium point always exists while the others exist under certain condition. The stability of first equilibrium point can be reached when the intrinsic growth rate is less than the death rate. Whereas, the others equilibrium points will be stable under certain condition. Numerical simulation is performed to illustrate the analysis result. It is shown that numerical results are in accordance with analysis result. These numerical simulations also indicate that the rate of passive smoker plays important role in the growth rate of lung cancer. Natural B, Journal of Health and Environmental Sciences 2017-10-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/345 10.21776/ub.natural-b.2017.004.02.6 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 2 (2017); 117-126 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/345/pdf Copyright (c) 2017 Natural B

oai:natural-b.ub.ac.id:article/223 2019-07-29T07:22:02Z natural-b:ART

Preliminary Study on the Determination of Volcanic Tremor Epicenter Using Semblance Method (Case Study of Sakurajima Volcano) Andinisari, Ratri Maryanto, Sukir Nadhir, Ahmad semblance; epicenter; volcanic tremor; Sakurajima volcano Volcanic tremor is one of the most important volcanic activities due its strong connection to magma movement and impeding eruption. Therefore, the determination of volcanic tremor epicenter becomes very important. The absence of apparent P and S wave arrival of volcanic tremor is the main constraint of its epicenter determination. The use of semblance method is required because semblance method requires no information about P and S wave arrival in epicenter determination. A preliminary application of semblance method has been done to determine the epicenter of 100 s length volcanic tremor of Sakurajima volcano. In this research we use the recorded seismic signal from 5 different volcano observatories, which are KOM, KAB, HIK, ARI, and HAR. The recorded tremor signal is then analyzed by using semblance method. The analysis is carried out by calculated semblance coefficient in every 30 s moving window along the signal. The resulting semblance coefficient varied from 0,25 to 0,42. The epicenter of observed volcanic tremor is located in the north-east part of Minamidake crater by -18,66o to 54,10o of azimuth counted from the east, while the epicentral distance of the observed volcanic tremor varied from 608,28 to 948,68 m from Minamidake crater. Natural B, Journal of Health and Environmental Sciences 2013-12-12 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/223 10.21776/ub.natural-b.2013.002.02.12 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 2 (2013); 172-177 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/223/187 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/223/93

oai:natural-b.ub.ac.id:article/265 2018-12-13T07:25:35Z natural-b:ART

Effects of Polystyrene Solvent Difference on Morphology of Polystyrene Layers and Viscoelastic Properties of QCM Biosensors Rahayu, Susi Masruroh, Masruroh Santjojo, Djoko H Rahmawati, Eka Didik, Lalu A. Robiandi, Fadli Sakti, Setyawan P QCM biosensor; polystyrene; solvent; morphology; viscoelastic In this research, a modified QCM surface was done to improve the performance of QCM biosensors. This modification is done by coating polystyrene (Ps) on a QCM with toluena and chloroform solvents. The polystyrene coating was performed using spin coating technique, the measurement of surface roughness values using non-contact topography measurement system TMS 1200, and the viscoelastic properties was analyzed by using an electrical impedance. The analysis result using TMS 1200 shows morphologies of polystyrene produced with chloroform solvent have groovier and more porous compared to the toluena solvent. The roughness values of Ps surface with choroform and toluena is about 616.52 nm and 578.9 nm, respectively. The different surface roughness both of the solvent is caused by vapor pressure of each solvent. The vapor pressure value of chlorofrom solvent is 0.26 atm and toluena solvent of 0.037 atm. Moreover, using Sauerbrey equation is found mass of deposited ps produced with chloroform solvent is more than the toluena solvent. The mass of the polystyrene deposited on the surface of QCM with chloroform resulted about 2.23 × 10-5 ± 7.59 × 10-7 g and with toluena of 1.16 × 10-5 ±9.23 × 10-8 g.  Furthermore, viscoelastic test show both polystirene layer are still rigid and have approximately 12.23 Ω impedance value. Therefore, the different solvents affect the surface morphologies of Ps. Natural B, Journal of Health and Environmental Sciences 2014-10-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/265 10.21776/ub.natural-b.2014.002.04.8 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 4 (2014); 343-348 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/265/218 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/265/109

oai:natural-b.ub.ac.id:article/120 2019-07-29T03:53:06Z natural-b:ART

Study of Sansevieria trifasciata's Morphology, Anatomy, and Leaf in Malang Aisyah, Winda Hariyati, Nunung Arumingtyas, Esti Laras anatomy, fibers, morphology, Sansevieria trifasciata The research had aim to study differentiation of morphology, anatomy, fibers content and fiber strength from leaves of S. trifasciata. The samples were obtained from five different districts in Malang, each varian was taken from three different locations, and each of their leaves was measured its length, width, thickness, and fiber content and fiber strength. Six varian Sansevieria Trifasciata which were found included Sansevieria Trifasciata Prain, S. trifasciata Prain var.laurentii, S. trifasciata varian lilian true oil plastic, and S. trifasciata Varian tiger, S. trifasciata varian moonshine and S. trifasciata varian parva kenya hyacinth. Each of S. trifasciata leaves had special pattern and color. The measurement result showed that the longest, widest, and thickness of leaves was given by S. trifasciata Prain var. laurentii, S. trifasciata varian moonshine and S. trifasciata varian parva kenya hyacinth respectively. S. trifasciata Prain var. laurentii had highest content fibers of leaves, weight of leaves and fibers strength. The anatomy observation showed that fiber xylem diameter of all varian was not significantly different. Sansevieria trifasciata varian tiger had the highest number of fibers Natural B, Journal of Health and Environmental Sciences 2012-01-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/120 10.21776/ub.natural-b.2011.001.02.5 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 2 (2011); 120-129 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/120/117 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/120/21

oai:natural-b.ub.ac.id:article/157 2019-07-26T03:57:41Z natural-b:ART

Study of Ozone Synthesis With Methods of Plasma Discharge Tjahjanto, Rachmat Triandi Wardhani, Sri Anggraini, Ulfa ozonator, ozone, plasma discarge In this research an ozonator prototype has been built to produce ozone, consists of air pump, gas flowmeter, an ozone reactor, and a glass pipe of nozzle. The most important part of the device is the reactor which consisting three main parts; 5 mm alloy electrode connected to a high voltage generator in the form of electrical gas stove lighter, 1 mm copper negative electrodes connected to the ground and a glass plasma discarge. The ozone gas formed is flowed to a container consisting of methyl orange solution 20 ppm at wave lenght of 470 nm. The concentration of ozone is determined by spectrophotometry method. The ozonator is characterized by ozonation periode variation of 5, 10, 15, 20, 25, and 30 minutes with the voltage used 3,5 volt, voltage variation of 3, 4, and 5 volts and flow rate variation of 227, 363, 464, 662, 864, and 1060 mL/min at the voltage used 3.5 volt. The result showed that the longer period and the higher voltage used for ozonation, the higher the ozone gas produced. The concentration of ozone obtained in this research is 0.76 ppm reached at 363 mL/min with 20 minutes ozonation duration. Natural B, Journal of Health and Environmental Sciences 2012-06-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/157 10.21776/ub.natural-b.2012.001.03.14 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 3 (2012); 280-287 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/157/141

oai:natural-b.ub.ac.id:article/315 2017-09-05T03:49:32Z natural-b:ART

Activity Test Ni/ZrO2-SiO2 Catalyst for Hydrodeoxygenation Reactions Mixtures the Furfurylidene Acetone Compound (FAc) and Difurfurylidene Acetone (F2Ac) Prihartini, Dita Ulfa, Siti Mariyah Iftitah, Elvina Dhiaul chemistry Ni/ZrO2-SiO2 catalyst, hydrodeoxygenation, furfurylidene acetone (FAc), difurfurylidene acetone (FAc) reaction and catalyst Hydrodeoxygenation (HDO) reaction of furfural derivatives have widely studied because these reaction produce saturated alkane which potensial for renewable fuels. Nickel based catalyst impregnated in to ZrO2-SiO2 (Ni/ZrO2-SiO2) was prepared and its activity is evaluated for HDO of furfurilidene aceto (FAc) and difurfurilidene acetone (F2Ac). Ni/ZrO2-SiO2 catalys was prepared from Ni(NO3)2.6H2O with 10% Ni loading over ZrO2-SiO2 by wet impregnation method. Characterization using X-ray showed the diffraction of Ni detected at 2θ = 44.42, 51.73, and 76.26. Catalyst activity for HDO of FAc and F2Ac was carried out at 200oC for 2 hours in batch system. According to gas chromatography analysis, the conversion of product is 100% with selectivity for 2-octanol and dodeka-6-ene is 88,22% and 2,99%, respectively. Natural B, Journal of Health and Environmental Sciences 2016-04-25 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article experimental application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/315 10.21776/ub.natural-b.2016.003.03.08 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 3 (2016); 253-259 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/315/pdf Copyright (c) 2017 NATURAL B

oai:natural-b.ub.ac.id:article/213 2019-07-29T07:22:02Z natural-b:ART

BSA Immobilization on QCM Sensor with Hydrophobic-Hydrophilic Properness Modification of Polystyrene Surface Using Ultraviolet (UV) Radiation Irawati, Fenny P. Sakti, Setyawan P Juswono, Unggul Aulanni’am, Aulanni’am QCM; modification; ultraviolet; contact angle; immobilization Research has been done to improve the optimization of the BSA (Bovine Serum Albumin) immobilization process on QCM sensor by modifying the nature of the hydrophobic-hydrophilic polystyrene surfaces using ultraviolet radiation (UV). The silver electrode of QCM sensor coated with a solution of polystyrene using spin coating technique. Sensor with polystyrene coating was heated using an oven until it reaches a temperature of 200 °C and then irradiated with ultraviolet light. A 30 µL of distilled water was dropped on the sensor surface and the formed contact angle was observed. The observation of the contact angle showed that there was a change in the nature hydrophobicity of sensor surface irradiated with UV. BSA immobilization was done by injecting a certain amount of BSA concentration in PBS solution on top of the sensor. We found that best surface for immobilization of BSA is one which is without UV irradiation. This means that the immobilization is mainly caused by hydrophobic force.  Natural B, Journal of Health and Environmental Sciences 2013-12-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/213 10.21776/ub.natural-b.2013.002.02.3 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 2 (2013); 117-121 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/213/178 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/213/85

oai:natural-b.ub.ac.id:article/255 2018-12-13T07:25:35Z natural-b:ART

Effect of Deposition Rate on Morphology of Zinc Phthalocyanine Layer (ZnPc) on Polystyrene Surface / QCM with Vacuum Evaporation Process Robiandi, Fadli Didik, Lalu A Rahmawati, Eka Rahayu, Susi Masruroh, Masruroh Sakti, Setyawan P. Santjojo, Djoko H ZnPc; vacuum evaporation; deposition rate; morfologhy; surface roughness. Deposition of zinc phthalocyanine (ZnPc) layer on top polistiren surface by vacuum evaporation method has been investigated. PS layer was coated on QCM surface by spin coater and ZnPc layer was deposited on its surface by vacuum evaporator with three variation of deposition rate, i.e 1.39 ´ 10-4, 8.08 ´ 10-2 dan 7,41 ´ 10-1 μm/s. The morphology and surface roughness of ZnPc layer was observed by scanning electron microscope (SEM) and non-contact topography measurement system TMS-1200 TopMap. SEM image of ZnPc layer with deposition rate of 1.39 ´ 10-4, 8.08 ´ 10-2 and 7.41 ´ 10-1 μm/s shows porous and fibre like structure. The size of pores and fibre structures of ZnPc layer that produced by deposition rates of 1.39 x10-4 and 8.08 x10-2 μm/s is smaller than size of pores and fibre that produced by 7.41 ´ 10-1 μm/s. Moreover, increasing the deposition rate result a lot of ZnPc molecules make a bonding as fibrous result in the volume of fibrous increasing. Moreover, the increasing fibre size result pores volume increase. Therefore deposition rate can affect surface roughness, and roughness value is proportional to morphology of ZnPc layer. Based on result of TMS-1200 TopMap, the highest roughness level is 1310 nm, it’s found on the ZnPc layer that produced by deposition rate of 7,41 ´ 10-1 μm/s. Natural B, Journal of Health and Environmental Sciences 2014-10-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/255 10.21776/ub.natural-b.2014.002.04.7 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 4 (2014); 336-342 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/255/217 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/255/108

oai:natural-b.ub.ac.id:article/109 2019-07-29T03:50:55Z natural-b:ART

Potential Changes of Water Spinach (Ipomoea aquatica Forsk) Root’s Cell Membrane as an Indicator of Environmental Pollution of Waste Water Iswarin, Siti Jazimah membrane potential, root cell, membrane potential, Morning glory, Ipomoea aquatica Forsk This research is to study the potential change of water spinach root cell membrane using various concentration of Pb ions in 20, 40, 60, 80, and 100ppm using water which come from irrigating rice field at three locations. Pb ions in water and water spinach are specified by Atom Spectrophotometer Spectrophotometer. The membrane potential change is regression determined. From the graph it is shown that the percentage change in membrane potential increases by Pb concentration. At the edge of the rice field, potential of water changes about (18±2) %, at 25 m from the edge, potential changes about (6±4) %, at 50 m from the edge, potential changes about (38±12) %. From this data, Pb2+ is 35.8 ppm (first location), 0 ppm (second location), and 135.3 ppm (third location). Pb2+ concentration calculated using AAS are 0.045 ppm (first location), 0.010 ppm (second location), and 0.025 (third location). In water spinach there are: Pb2 + / ppm; 3.0; 0.9; 5.6. The membrane potential is affected by the ion solution. The higher the pollution, the higher the membrane potential will be. Increasing the type of substance also increases the membrane potential changes that are sensitive to Pb ions. Based on this case the potential change of cell membrane of root of water spinach can be used as an indicator of pollution. Natural B, Journal of Health and Environmental Sciences 2011-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/109 10.21776/ub.natural-b.2011.001.01.5 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 1 (2011); 35-40 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/109/108 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/109/9 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/109/10

oai:natural-b.ub.ac.id:article/291 2018-12-13T07:26:31Z natural-b:ART

Land Suitability for Sarimukti Area Surrounding Neighborhood Development Direction Mareta, Nandian Al Kautsar, Andre Suitability of Land; Resedential Development; Regional Development; Sarimukti Sarimukti and surrounding administratively located in the District Rajamandala, Bandung regency, West Java Province. This exciting area of research due to be made the object of a Final Disposal (TPA) which accommodates large-scale garbage from the city of Bandung. Rapid population growth, especially in the area and surrounding Sarimukti requires the development of appropriate settlement in the region. Land suitability analysis was conducted to determine the distribution of the region for the development of settlements. The method is performed in the form of an inventory of primary data include geological data and morphology. After it is weighted by considering the most influential factor. Assessment is done on each cell-cell on the topographical map as a base map. Each cell was given a score and cumulative score is the total score for each cell. Furthermore, by using a statistical method known range of the score most likely to be developed as residential areas. The results are three criteria in the region of the study area is the realm of possibility, region and area constraints limitations.  Natural B, Journal of Health and Environmental Sciences 2015-11-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/291 10.21776/ub.natural-b.2015.003.02.8 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 2 (2015); 150-157 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/291/247

oai:natural-b.ub.ac.id:article/142 2019-07-26T03:57:40Z natural-b:ART

Avalanche Potential Analysis using Resistivity Method and USLE Method on Ranu Pani Area, Senduro Sub-district of Lumajang Regency Purnomo, Siswo Sunaryo, Sunaryo Hakim, Luchman Landslides, Ranu Pani Lake, USLE Methods, Resistivity Methods. Has done research in the Ranu Pani area is one of the area where landslides have its potentiality, due to its location on the edge of the mountains where the soil is clay, slightly, sandy and has a very high fertility rates. One of the methods used to analyze landslide potential is using USLE (Universal Soil Loss Equation). In addition, the resistivity method with dipole-dipole configuration is also used to determine the structure of the soil and slip areas in the hills in the area Ranu Pani. Debris flow obtained from calculations using the USLE method in the second trajectory is equal to 796.5 tons/year, and the third trajectory is equal to 291.506 tons/year. According to the classification level of erosion, Ranu Pani area is an area with very dangerous level of erosion hazard, because the value of debris flow is more than 180 tons/year. With the high value of debris flow erosion, causing higher sedimentation of the lake, because the Ranu Pani lake accommodate most of the debris flow erosion of the hills around it. Natural B, Journal of Health and Environmental Sciences 2012-06-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/142 10.21776/ub.natural-b.2012.001.03.2 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 3 (2012); 200-206 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/142/130

oai:natural-b.ub.ac.id:article/342 2017-10-20T06:50:33Z natural-b:ART

Determination of Neutron Spectrum at LINAC Using a Passive Single Sphere Spectrometer Hakim, Muhammad Helmi Widodo, Chomsin Sulistya Bunawas, Bunawas Rasito, Rasito Faloak extract; Pb; tilapia egg; membrane potential Neutron spectra at Linear Acceleration (LINAC) facility was needed to protect neutron radiation. The purpose of determination of neutron spectra at LINAC using Passive Single Sphere Spectrometer is getting spectra and neutron fluence from LINAC and knowing the influence of input voltage at LINAC to its spectra and neutron fluence output. Single Sphere Spectrometer (SSS) with diameters 30 cm using seven gold foil detectors was set in position a half of diameter (0, 3, 6, 9, 11, 12, 13 cm) from center of the SSS. Measurement of neutron count rate was performed by placing SSS under gantry of LINAC with SSD 100 cm in distances. Next, neutron count rate was used as input data in UMG 3.3 program to get spectra. Based on measurement, total of neutron fluence at LINAC 10 MV and 15 MV is 5,78 ´ 104 n/cm2.s ± 0,01 ´ 104and 9,44 ´ 105 n/cm2.s ± 0,22 ´ 105, so increasing input voltage at LINAC was followed by increased neutron fluence. Natural B, Journal of Health and Environmental Sciences 2016-10-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/342 10.21776/ub.natural-b.2016.003.04.7 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 4 (2016); 311-317 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/342/pdf Copyright (c) 2016 Natural B

oai:natural-b.ub.ac.id:article/196 2019-07-29T07:24:31Z natural-b:ART

Estimation of Structures Under Ancient Archaeological Sites Site of Jabung Temple, Probolinggo, Indonesia Using Geolistrik Resistivity Method Isdarmadi, Kosmas Susilo, Adi Sunaryo, Sunaryo subsurface sounding, Jabung Tample site, geolectrical resistivity The sounding of geoelectrical resistivity distribution using dipole-dipole configuration around the Jabung temple site located in the Jabung Candi village, Paiton, Probolinggo District, East Java province, Indonesia has been done by using Resistivitymeter OYO MacOhm. The aim of the research was to determine the distribution and depth of rock below the Jabung temple area also as an information for investigation and discovery efforts of ancient objects which are still burried. Aquisition are taken by ten lines and ±20.042 m2 of coverage area. Line 1, 2, 3, 4, 5, 6 located around in Menara Sudut temple at length of measurement line12 m and at a distance of electrode spacing are 1 m, where lines 1 and 4 located in outcrop of Menara Sudut tample. While lines 7, 8, 9, and 10 located in all area of Jabung temple. Lines 7 and 8 have length of measurement lines 150 m with spacing 10 m, while lines 9 and 10 have length of measurement lines 200 m with spacing 4 m, where line 8 located pass to main Jabung tample. The processing of data was using RES2DINV software. Resistivity values that are used to determine the temple rock is the resistivity value of sandy clay. Base on geoelectrical investigation and interpretation shows the sandy clay as temple rock with resistivity value 33 Ω.m to 92.6 Ω.m on average depth of 1.79 m and the others remain of tample rock around the main Jabung tample. This research shows geoelectrical method is good idea to subsurface sounding especially for archeology case, it caused this method is simple and more cheap than ekskavation method. Natural B, Journal of Health and Environmental Sciences 2013-05-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/196 10.21776/ub.natural-b.2013.002.01.8 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 1 (2013); 50-57 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/196/169

oai:natural-b.ub.ac.id:article/450 2019-06-20T08:30:02Z natural-b:ART

Antimicrobial Potential of Methanol Extract from Kastuba Leaf (Euphorbia pulcherrima Willd.) Ibrahim, Atwazah Taisir Suketi, Kurniasih Wirasisya, Dyke Gita kastuba; antimicrobial; Euphorbia pulcherrima Willd; ethnomedicine Some bacteria have been resistant to one or more types of antibiotics, so an effort to find new antimicrobial sources based on medicinal plants is needed. Research that has been done shows that there are 22 types of plants used as wound treatment used by local people of Timbanuh, East Lombok, one of them is kastuba (Euphorbia pulcherrima Willd.). This study was conducted to test the antimicrobial potential of kastuba leaf extract which has been used ethnomedicinely as a wound teratment in Timbanuh. The antimicrobial activity of kastuba extract was tested against Staphylococcus aureus bacteria. This test used 4 samples. Sample 1 (leaf part 1-5, wind dry method), samples 2 (leaf part 6-10, wind dry method), samples 3 (leaf part 11-15, wind dry method), and sample 4 (leaf part 11-15, oven dry method). The measurement of the antimicrobial potential was carried out by the well diffusion method. The results showed that kastuba leaf extract (samples 1 to 4) at concentration 10 mg / 100µL had a inhibition zone of 9,208; 10,041; 10,583; 11,541 mm and 11,85; 12.08; 14.25; 15.92 mm at concentration 20 mg / 100µL. Sample 4 showed larger inhibition zone affected by different drying method used. The conclusion of this study is kastuba leaf extract has the potential as an antimicrobial. Natural B, Journal of Health and Environmental Sciences 2019-04-29 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/450 Natural B, Journal of Health and Environmental Sciences; Vol 5, No 1 (2019); 13-18 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/450/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/450/154

oai:natural-b.ub.ac.id:article/246 2018-12-13T07:25:20Z natural-b:ART

Determination of Optimum Anti Protein Specific Concentration of 208 kDa Milk Cow on QCM Sensor Chabibah, Nur Sakti, Setyawan P. Padaga, Masdiana Ch. Noor, Johan A. E. Irawati, Fenny Wahyuni, Farida QCM Sensor; anti PSS 208 kDa The purpose of the research is to detect optimum concentration of immobilization of anti protein cow’s milk with 208 kDa molecular weight’s (anti PSS 208 kDa) by utilizing QCm (Quartz Crystal Microbalance) sensor. The purpose of research is to detect optimum concentration of immobilization of specific anti protein cow’s milk with 208 kDa molecular weight’s (anti PSS 208 kDa) by utilizing QCM (Quartz Crystal Microbalance) sensor. QCM sensor had been coated by polystiren solution of 5% which is heated until 200 ◦C. During measurement, QCM sensor place on data accuisition and QCM-Box measurement. 30 µL Anti PSS 208 kDa with concentration varied between 200 mg/L up to 1400 mg/L was dropped to QCM sensors. Frequency changes were recorded as a function of concentration of anti PSS 208 kDa. The frequency changes due to presence of anti PSS 208 kDa deposited on the surface of QCM sensor were not spontaneous, but takes time to reach steady state. As the concentration of anti PSS 208 kDa increased, so is the frequency change until it reaches saturation point at 1000 mg/L. The mass percentage of anti PSS 208 kDa deposited on QCM sensor surface is decreased with increasing anti PSS 208 kDa concentration. Therefore optimum immobilization concentration of anti PSS 208 kDa is define on frequency changes at first saturation point, that is at 1000 mg/L concentration namely 267 ± 5 Hz Natural B, Journal of Health and Environmental Sciences 2014-04-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/246 10.21776/ub.natural-b.2014.002.03.8 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 254-260 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/246/203

oai:natural-b.ub.ac.id:article/349 2017-09-05T02:41:32Z natural-b:ART

oai:natural-b.ub.ac.id:article/281 2018-12-13T07:26:18Z natural-b:ART

Inventory of Medicinal Plants in Kampung Adat Urug, Urug Village, Sukajaya District, Bogor Regency Izzuddin, Muhammad Qais Azrianingsih, Rodiyati bitung bamboo; cardamom; ethnobotany; Kampung Adat Urug This research purposed to find out species, preparation and uses of medicinal plants in Kampung Adat Urug. Ethnobotanical survey was conducted from November 2013 until May 2014 using interview (semi-structured) and observation activities. The respondents were determinated by snowball sampling with the head of Kampung Adat Urug as a key informant. The observation was conducted for documenting medicinal plants based on respondent recomendation. Data gained from this activity was qualitatively described. Medicinal plants used by the Kampung Urug were 53 species singly and 5 herbs. Those species belonged 27 families. The most recomended medicinal plants were Cardamom and Bitung Bamboo. Those plants often to treat cough with dringking extraxted water from trunk (dituak). Bitung Bamboo shoot soup is used to prevent aging. In Kampung Adat Urug, traditional midwife often use medicinal plants to make herbs for healing any diseases, such as headache, stomachache, kidney problem, and also increasing stamina for adult and women after pregnant. Medicinal plants and herbs which were recomended by respondents were adequate treatment for any diseases because they have evidences between ethic and emic   Natural B, Journal of Health and Environmental Sciences 2015-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/281 10.21776/ub.natural-b.2015.003.01.11 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 1 (2015); 081-092 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/281/238 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/281/127

oai:natural-b.ub.ac.id:article/312 2017-09-05T03:49:32Z natural-b:ART

Dosimeter Response Personal Eye Lens Using TLD-900 (CaSO4: Dy) In Radiation Field Beta And Photon Anggarani, Ni Kadek Nova Noor, Johan A.E. Bunawas, Bunawas Beta; Eye lens dosemeter TLD CaSO4:Dy; photon; response Manufacturing and testing of eye lens dosemeter have been carried out using TLD detector CaSO4: Dy in beta radiation field. The results indicated a good response in reproducability and homogeneity with the acquisition of the response variations below 10%. The response to variations in beta energy indicated that the beta with energy below 0,7 MeV, represented by 85Kr, could not penetrate the filter layer, while high energy beta of 90Sr/90Y was able to penetrate the filter and provided response to 137Cs of 0.44 ± 0.07. Response to incidence angle of beta radiation showed dependence on the angle of incidence of irradiation. The response indicates the photon energy dependence on the energy below of 100 keV with angle response of radiation incidence on the energy 65 keV showed good results with the difference in readings against the irradiation of 0° maximum 20 %. Natural B, Journal of Health and Environmental Sciences 2016-09-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/312 10.21776/ub.natural-b.2016.003.03.06 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 3 (2016); 241-246 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/312/pdf Copyright (c) 2016 NATURAL B

oai:natural-b.ub.ac.id:article/185 2019-07-29T03:22:08Z natural-b:ART

Study of Package Fraction Fraction Sensitivity TRISO in Design of HTR Pebble Bed Criticality Zuhair, Zuhair Suwoto, Suwoto packing fraction, TRISO particle, HTR pebble bed, keff, swing reactivity. HTR is a high temperature reactor used for electricity production and process heat applications such as hydrogen production, desalination of sea water, enhanced oil recovery and so on. HTR is designed based on the utilization of TRISO fuel particles that can prevent strongly the escape of fission products even at temperatures above 1600 oC. TRISO particles packing fraction is one of four key parameters that are essential in HTR design besides radius of the kernel, kernel density and fuel enrichment. This paper discusses the sensitivity of TRISO particles packing fraction that impacts to the loading of uranium in the fuel pebble, the long cycle of reactor operation and achievable maximum fuel burn-up. With the capability of Monte Carlo transport code MCNP5, all components of the reactor, starting from TRISO particles, were modeled in detail and explicit and calculated using the continuous energy nuclear data library ENDF/B-VI. The results show that the value of effective multiplication factor (keff) has a tendency to increase with decreasing particle TRISO packing fraction and to decrease with increasing fuel burn-up. Keff values decrease with increasing TRISO particle packing fraction both at the beginning of cycle (BOC) and at the end of cycle (EOC). Reactivity swing is also very sensitive on the TRISO particles packing fraction. From the analysis, it can be concluded that TRISO particles packing fraction greatly affects the neutronics performance of HTR pebble bed design. Packing fraction can change the effective multiplication factor (keff) and the swing reactivity with similar behavior. Natural B, Journal of Health and Environmental Sciences 2012-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/185 10.21776/ub.natural-b.2012.001.04.13 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 4 (2012); 377-385 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/185/160 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/185/62

oai:natural-b.ub.ac.id:article/413 2018-07-30T02:05:37Z natural-b:ART

The Efffect of Wave Sound at Frequency 3 kHz - 4 kHz on Logawa Rice Resistance to Rice Lices Nadliroh, Kuni Rice lice is one type of pest that attacks rice, the presence of rice lice can damage the content of rice, rice form and color of rice. Rice that is exposed to rice lice pests will easily fragile and turn into powder and the color of the rice turns yellowish. Innovation is needed to reduce the population of rice lice in the storage phase, so this study aims to determine the effect of sound waves of 3 KHz to 4 KHz frequency on the resistance of logawa varieties to rice lice, in this study the rice plants given the treatment of sound waves of 3 KHz frequency until 4 KHz and without sound waves as controls. Giving of sound waves is done every day from 06.00 to 09.00. Natural B, Journal of Health and Environmental Sciences 2018-06-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/413 10.21776/ub.natural-b.2018.004.03.3 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 3 (2018); 140-144 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/413/pdf Copyright (c) 2018 Natural B

oai:natural-b.ub.ac.id:article/237 2018-12-13T07:25:20Z natural-b:ART

Effect of Nitrogen Fertilizer on Calcium Oxalate Calibration Density of Porang Bulb (Amorphophallus muelleri Blume) Amalia, Bina Rizki Harijati, Nunung Mastuti, Retno Calcium oxalate crystals; nitrogen fertilizer; porang; tuber. The aim of this research was to know the effects of nitrogen fertilizer to the shape and density of calcium oxalate (CaOx) crystals in porang tuber. Bulbil derived from porang plant in the first growth period seeded until the leaves fully open. Seedlings were transferred to a polybag after most of them has height 50 cm. After adapting for three weeks, the plants were treated with nitrogen fertilizer (urea) with a dose 0, 1, and 5 g/polybag. The plants were grown until the end of the growing period. The slides were prepared by slicing tuber as thin as possible using a sliding microtome. Sliced tuber of porang were cleared by using the modified clearing method. The slides were observed using light microscope to calculate the density of CaOx crystals. The densities of calcium oxalate crystals were analyzed using ANOVA (α = 0,05). The results showed that porang tuber has four kind of crystals i.e. raphide, druse, stiloid, and prism. Nitrogen fertilization had no significant effect on the densities of calcium oxalate crystals. Natural B, Journal of Health and Environmental Sciences 2014-04-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/237 10.21776/ub.natural-b.2014.002.03.11 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 271-276 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/237/207

oai:natural-b.ub.ac.id:article/272 2018-12-13T07:26:18Z natural-b:ART

Production of Organic Polymer Based Monolithic Columns for Anion Separation using High Performance Liquid Chromatography Annisa’, Dewi Nur Tasfiyati, Aprilia Sulistyarti, Hermin Sabarudin, Akhmad monolithic columns; poly-(GMA-co-EDMA); strong anion exchanger; HPLC; inorganic ions; indirect UV detection Methacrylate-based monolithic columns have been prepared in silanized silicosteel column (100 ´ 0.5 mm id) by in situ polymerization reaction, using glycidyl methacrylate (GMA) as monomer, ethylene dimethacrylate (EDMA) as crosslinker, porogen (1-propanol, 1,4 butandiol, water) and initiator AIBN.  Monolith poly-(GMA-co-EDMA) was then modified with diethylamine and benzyl chloride to obtain ammonium quartener as strong anion exchanger. From the characterization of 4 monolith in this study, monolithic columns poly-(GMA-co-EDMA) with %T 40, %C 25 and polymerization time 24 h has good mechanical stability and permeability, adequate molecular recognition sites (indicated by binding capacity value of 10,119 mg/mL), and has good proportion of flow throughpore and mesopores (45,04% and 41,32% respectively). It can successfully separate the mixture sample of anion consisting of fluoride, bromide, sulfate and nitrate ions by indirect UV detection. Natural B, Journal of Health and Environmental Sciences 2015-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/272 10.21776/ub.natural-b.2015.003.01.2 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 1 (2015); 008-016 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/272/229 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/272/118

oai:natural-b.ub.ac.id:article/125 2019-07-29T03:53:06Z natural-b:ART

Nitration Time and Ultrasonic Waves Utilization Effects Against Mol Percentage of Nitrogen in Nitrocellulose Synthetic Based on Cotton Fiber Rahman, Mohammad Farid Astika, I Made Jiwa Kurniawan, Yudhi Dwi Suratmo, Suratmo nitrocellulose, ultrasonic wave Nitrocellulose is an ester of nitric acid from cellulose which has important role in propellant manufacture, especially having minimal degree of substitution (DS) of 2.5. The aims of this research were to understand the influence of time of reaction in nitration of cotton fiber both synthesized with and without using ultrasonic wave irradiation to mole percentages of nitrogen in nitrocellulose products. The nitrations were conducted by using mixture of sulphuric acid and nitric acid with mass composition ratio of 3:1 (30 mLs of H2SO4 95-97% (w/w) solution; 20 mLs of HNO3 65% (w/w) solution) for 35, 40, 45, 50 and 55 minutes at temperature of 28-29oC, whereas in irradiation treatment by ultrasonic wave the initial temperature adjusted at the same. The mol percentages of nitrogen in nitrocellulose products were determined by using absorbance ratio method from IR spectra without external calibration prerequisite. The results showed that the mol percentages of nitrogen in nitrocelluloses both synthesized with and without using ultrasonic wave irradiation tended to increase up to about 45 minutes and tended to decrease after it. The highest mole percentage of nitrogen in nitrocellulose product synthesized without using ultrasonic wave irradiation was 33.05% with DS of 0.99; whereas that of using ultrasonic wave irradiation increased to 52.78% with DS of 1.58. The analysis of IR spectra and burning characteristic from nitrocellulose products showed the existence of the NO2 group in nitrocellulose products. Natural B, Journal of Health and Environmental Sciences 2012-01-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf text/html https://natural-b.ub.ac.id/index.php/natural-b/article/view/125 10.21776/ub.natural-b.2011.001.02.10 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 2 (2011); 158-167 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/125/122 https://natural-b.ub.ac.id/index.php/natural-b/article/view/125/325 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/125/29

oai:natural-b.ub.ac.id:article/169 2019-07-29T03:22:07Z natural-b:ART

Patchouli Oil Characteristics by Optimization Result of Distillation Time of Patchouli Leaf Dewaxing and Fermentation Raharjo, Sentot Joko Retnowati, Rurini Soebiantoro, Soebiantoro the characteristic of patchouli oil, time distillation, patchouli oils, dewaxing, fermentation The characteristic of patchouli oil of dewaxing, fermentation and time distillation toward patchouli leaves used GC-MS have been done.   The aim of the study was to characterization of patchouli oil on distillation time of patchouli leaves of dewaxing and fermentation.  The characteristics of patchouli oil on the distillation time for 12 hours, then the distillate collected every 2 hours showed that of the best result was the 3rd fraction collected distillate time of 12 hours with a yield of 0.56 %, light yellow color, specific gravity 0.9685 g/ mL and a refractive index of 1.5095 and patchouli alcohol of 69.56 %. Characteristics of patchouli oil on distillation time (2, 4, 6, 8, 10, 12) hours showed that of the best result was time distillation for 12 hours with a yield of 6.61 %, light yellow color, specific gravity of 0.9672 g/ mL, refractive index of 1.5082 and patchouli alcohol of 45.69 %. The other components of patchouli oil detected were alpha-gurjunene, cis-thujosene, beta-patchoulene, alpha-patchoulene, beta-caryophyllene, alpha-guaiene, seychellen, aromadendrene, beta-gurjunene, alpha-humulene, alpha-bulnesene, gemacrene-D, dehidroaromadendrene, gemacrene-A, gamma-patchoulene, valencene, viridiflorene, selina-3,7-(11)-dien, nor-patchoulenol, pogostol, illudol, globulol, beta-caryophyllen oksida, viridiflorol and ledol. Patchouli oil quality to meet requirements SNI 06-2385-2006 and ISO 3757:2002. Natural B, Journal of Health and Environmental Sciences 2012-11-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/169 10.21776/ub.natural-b.2012.001.04.5 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 4 (2012); 328-336 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/169/147 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/169/52

oai:natural-b.ub.ac.id:article/395 2018-01-23T04:06:10Z natural-b:ART

Effect of Spirulina Extract on Diazinon Effect at the Channel Membrane Albumin and Vitelin Membranes Based on Strong Flows and Voltage Amalia, Dian Rizqi Nur Abdurrouf, Abdurrouf Juswono, Unggul P. Potential membranes; Diazinon 600 EC; Spirulina; Microelectrode; PicoScope 5000 series The use of pesticides in foods can be bad for human health, so the danger of pesticide use in food can damage cell metabolism or permeability of the cell membrane. This study aims to analyze the effect of Spirulina extract on the potential difference of egg cell membrane of albumin and vitellin chickens against anti channel blocker on diazinon. The contaminant used in this research is diazinon 600 EC. How to overcome the contamination of livestock products that can be harmful to health one of them using antioxidants. Thus, the administration of Spirulina extract can affect the potential response of egg cell membranes (Gallus Gallus domesticus) in the polluted food of diazinon. Potential rabbit egg membrane can be measured by using microelectrode associated with PicoScope 5000 series, then the data appears will be displayed through the PC. The results of this measurement showed that along with the increase of diazinon solution concentration, the potential value of egg cell membrane produced decreased. While the influence of Spirulina extracts in the egg (Gallus gallus domesticus) membrane that has been contaminated diazinon showed the potential value of membrane bigger/higher. This is because in the extract Spirulina has phenolic and flavonoid content that has the potential as an antioxidant that can be useful to reduce the level of free radical reactivity caused by diazinon.  Natural B, Journal of Health and Environmental Sciences 2017-10-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/395 10.21776/ub.natural-b.2017.004.02.3 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 2 (2017); 099-104 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/395/pdf Copyright (c) 2017 Natural B

oai:natural-b.ub.ac.id:article/218 2019-07-29T07:22:02Z natural-b:ART

Determination of Internal Structure of Semeru Volcano Based on Seismic Attenuation Imagery Dian Ayu, Hena Susilo, Adi Maryanto, Sukir Hendrasto, Muhamad Semeru volcano; attenuation; Q-factor and internal structure. Characteristic of medium could be defined by physical parameters such as seismic velocity and attenuation. Amplitude, hyocentral distance, frequency and attenuation coefficient is required to determine the Q-factor value  or attenuation in effort on imaging the internal structure. In this study, we used volcanic earthquakes data of Semeru Volcano recorded 2009 that consist 54 seismogram (24 A-type volcanic earthquakes and 24 explosion volcanic earthquakes. The Q-factor value of A-type volcanic earthquakes is 4 - 392 or about 78,87 and the Q-factor value of explosion volcanic earthquakes is 4 - 288 or about 51,39. In term of the image quality, it can be seen that the attenuation on Jongring Seloko active caldera and under Jongring Seloko have low attenuation value or high Q-factor value thas was called the zone beneath. The zone beneath is interpreted to associated with hot material that may indicate the magma chamber that  concentrated in the depth interval of 1-1,8 km from the top of Semeru Volcano. The zone beneath have structural trends on West-East-Southeastern-South sector out the volcano. The internal structure of Semeru Volcano is predominance of sedimentary rocks, sandstone and rocks with gas in pore space. Although in some deep layer have internal structure as metamorphic rocks and igneous rock. Natural B, Journal of Health and Environmental Sciences 2013-12-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/218 10.21776/ub.natural-b.2013.002.02.8 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 2 (2013); 145-152 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/218/183

oai:natural-b.ub.ac.id:article/259 2018-12-13T07:25:35Z natural-b:ART

Cu (II) Recovery with Solid Phase Extraction Technique Using Silica Adsorbent from Rice Husk ash - Chitosan Widodo, Nanang Tri Mulyasuryani, Ani Sabarudin, Akhmad solid phase silica–chitosan; solid phase extraction; Cu2+ ion; recovery Copper compounds are widely used in modern industry. Many of these compounds are dumped into the surrounding environment. Copper is toxic and able to cause some diseases. The aim of this study is to create solid phase from natural material that applied to the solid phase extraction method as an alternative method to decrease the level of copper from water bodies and able to preconcentrate Cu2+ ions, reaching the detectable level. Silica from rice husk ash modified with chitosan result in an adsorbent that can improve the adsorption of Cu2+. Interaction of Cu2+ with solid phase silica–chitosan is based on data of Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). The percentage recovery of Cu2+ each the Cu2+ concentration of 0.05, 0.1 and 0.2 ppm is 55.32%, 54.35% and 71.94%. The adsorbent has ability to adsorb Cu2+ is 100%. Natural B, Journal of Health and Environmental Sciences 2014-10-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/259 10.21776/ub.natural-b.2014.002.04.11 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 4 (2014); 360-365 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/259/222 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/259/112

oai:natural-b.ub.ac.id:article/115 2019-07-29T03:53:06Z natural-b:ART

General Linear Mixed Model (GLMM) Bi-response Applications on Diabetes Mellitus Patients Response Rinaldo, Adji Achmad Harmamik, Sulis Longitudinal, GLMM, Bi-Response General Linear Mixed Model  (GLMM) Bi-respon was  an  alternative  solution for  longitudinal  data  with  bi-responses  which  joining  fixed  effects, random effects and vector of  realization of bi-responses process  into single  statistical model. GLMM can  overcome  the  correlation between  observations  in  longitudinal  data  for  the  response  in  the form of continous data.  In each formation GLMM model beginning with  the  determination  of  a  tentative model  through  exploration  of data.  Exploration  data  covering  several  aspects  of  the  individual profile,  average  structure,  variance  structure,  and  correlation structure. Building GLMM  was done by  selecting  fixed  effects under using  Maximum  Likelihood  (ML)  method,  and  the  selection  of variance  components  (the  number  of  random  effects)  using Restricted  Maximum  Likelihood  (REML)  method.  Based  on  the comparison of AIC value, Diabetes Mellitus Type 2 disease data  was better  to  be  modeled  using  GLMM  with  one  response.  Cross correlations  matrix  elements  were  about  0.3  to  0.6  and  produced unstructured  covariance.  Correlation  coefficient  between  two responses was 0.5526 and  produced unstructured  covariance. Natural B, Journal of Health and Environmental Sciences 2012-01-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/115 10.21776/ub.natural-b.2011.001.02.1 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 2 (2011); 93-101 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/115/113 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/115/17

oai:natural-b.ub.ac.id:article/296 2018-12-13T07:26:31Z natural-b:ART

Analysis of Effect of Sound Frequency Against System Open Close Stomata of Rice Plant of Logawa Variety Nadliroh, Kuni Widodo, Chomsin S. Santoso, Didik R. sonic bloom; width stomata; intensification This study aimed to determine the effect of sound waves to open the closed stomata rice plants in sonic bloom technology, the frequency used for rice crops, as well as help the intensification of agriculture. This study was conducted on rice types Logawa, where rice plants used are rice plants ready for planting. Ready for planting rice plants treated without wave, 10 Hz, 4 kHz, 7 kHz, 30kHz. Parameters measured were wide rice plant stomata. The results showed that the rice plants have stomata greatest width occurs when the plant is given 4 kHz frequency sound waves, the waves at 06.00 - 09.00.  Natural B, Journal of Health and Environmental Sciences 2015-11-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/296 10.21776/ub.natural-b.2015.003.02.13 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 2 (2015); 187-192 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/296/252

oai:natural-b.ub.ac.id:article/153 2019-07-26T03:57:40Z natural-b:ART

Early Poly Mass Effect (trimethylene-sebasat) On Biodegradation Rate In Liquid Media Using Mucor Miehei In Aerobic Kholisul Fuad, Akhmad Mardiana, Diah Roosdiana, Anna aerobic, Poly(trimethylene-sebacate), biodegradation rate , Mucor miehei The author has conducted research about the effect of poly(trimethylene-sebacate) mass toward the rate of biodegradation using Mucor miehei in aerobic liquid media. Poly(trimethylene-sebacate) is a biodegradable linear aliphatic polyester, that can be degraded by Mucor miehei lipase. To determine the effect of poly(trimethylene-sebacate) mass in the biodegradation, the mass of poly(trimethylene-sebacate) were varied 0.06 g, 0.08 g, 0.1 g, 0.12 g and 0.14 g. Biodegradation process carried out for 12 hours, using liquid of Complex media, which was nutrient rich for Mucor miehei growth, and solution at pH 5. The resulting CO2 gas was flowed into the 50 mL reservoir of 0.1 M NaOH, followed by titration using 0.05 M HCl and MO (methyl orange) and PP (phenolptalein) indicator. The rate of CO2 gas were 0.287 x 10-3 M/h; 0.102 x 10-3 M/h; 0.137 x 10-3 M/h; 0.016 x 10-3 M/h; and 0.039 x 10-3 M/h respectively. The greater rate of CO2 produced the lower mass of poly(trimethylene-sebacate). Natural B, Journal of Health and Environmental Sciences 2012-04-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/153 10.21776/ub.natural-b.2012.001.03.10 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 3 (2012); 254-259 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/153/137

oai:natural-b.ub.ac.id:article/360 2018-12-13T07:27:17Z natural-b:ART

Simulation of TLD-700 (Lif; Mg, Ti) for Determination of Hp Equivalent Dose (10) on Radiation Workers (Gamma) with MCNPX Approach Pradipta, Aisyah Dianing Rianto, Sugeng Bunawas, Bunawas Dosage of Hp (10); MCNPX; TLD-700 Radiation workers are compulsory to monitoring radiation dose for reduce the effects of ionizing radiation on the body. Government through similar BAPETEN maximum dose for radiation workers is 20 mSv/year. One of the personal monitoring tool that is widely used is the TLD-700 (specially for gamma radiation). The equivalent dose to the worker's body to a depth of 10mm (Hp(10)) able to be predicted from a simulation approach MCNPX. To simulation needed input model of geometry which adapted to the geometry experiments. The simulation results at the source position vertical to the dose rate is obtained 8,565mSv/h, which shows a difference of 1.5% on the results of the experiment, so the Hp(10) dose can be determined. This experiment able to simulated for contamination source 137Cs on the floor position unable to be done experimentely contamination source. Estimation through simulation, the dose rate on the floor at 14.920 mSv/h. The results showed the difference of dose rate through dose rate 75% vertical source larger than the vertical direction. According to the result need to be calibration TLD-700 for the source position from the bottom. Because the greater the dose rate (from below), the greater the Hp(10) dose is received. With the result clear that considerable potential MCNPX used to estimate personal Hp(10) dose for radiation workers, specially in relation to the case of a radiation accident. Natural B, Journal of Health and Environmental Sciences 2017-04-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/360 10.21776/ub.natural-b.2017.004.01.6 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 1 (2017); 45-49 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/360/pdf Copyright (c) 2017 Natural B

oai:natural-b.ub.ac.id:article/201 2019-07-29T03:41:08Z natural-b:ART

Potential Soursop Leaf Extract, Soursop Seeds and Mahogany Seeds for Grayak Caterpillar Control (Spodoptera litura L.) Yanuwiadi, Bagyo Leksono, Amin Setyo H., Hiasinta Guruh Fathoni, M. Bedjo, Bedjo Soursop seed extract, soursop leave extract, mahogany seed extract, Botanical insecticide, Army worm larvae (Spodoptera litura L.) This research objective is to compare the effect of extracts of soursop leave, sousop seed and mahogany seed on stop feeding, mortality and surviving of pupae and imago of army worm (Spodoptera litura L.). Army worm larvae were collected from Kebun Percobaan Muneng Research Field, Probolinggo and transferred to laboratorium for rearing and treatment. Soursop leaves, soursop seeds and mahagony seeds were extracted by aquades extraction method. Bioassays were conducted by using five concentration variation applied on 10 larvae by dipping method with twice replication. Observation of stof feeding was conducted every 2 hours during 24 hours. Whereas, observation on mortality was done every 24 hours during 168 hours. Result showed that the effect of soursop leave extract on the stop feeding and mortality was better than that of soursop and mahogany seed. This effect was started from 33.3% at 16 HAA (hours after application) increased to 46% at 24 HSA. Interestingly, the effect on survivality of pupae and imago was highest on the application of mahagony extract. The failure of pupation was 70%, and that of imago was 76.6%. This indicates that the effect of soursop leave extract is better for sort time application but on the long-term, the effect of mahogany seed is better than the others.  Natural B, Journal of Health and Environmental Sciences 2013-05-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/201 10.21776/ub.natural-b.2013.002.01.13 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 1 (2013); 88-93 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/201/174 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/201/77

oai:natural-b.ub.ac.id:article/466 2020-06-03T07:29:35Z natural-b:ART

Gambaran Penggunaan Obat Antidiabetes Mellitus Berdasarkan Indikator WHO di Instalasi Rawat Jalan RSUD Provinsi NTB Periode 2018 Turisia, Nadya Arianita Aini, Siti Rahmatul Ratnata D, Ni Made Amelia Diabetes Mellitus, RSUDP NTB, WHO Prevalensi diabetes mellitus (DM) di Indonesia meningkat menjadi peringkat ke-5 di dunia dengan perkiraan 9,1 juta penderita DM pada tahun 2014. Diabetes merupakan gangguan pada glukosa darah dengan karakteristik meningkatnya kadar glukosa darah disertai dengan penyakit lain. Penelitian ini bertujuan untuk mengetahui gambaran penggunaan obat pada pasien DM berdasarkan indikator peresepan World Health Organization (WHO) yaitu jumlah obat perlembar resep, penggunaan obat generik, antibiotik dan obat injeksi. Pengumpulan data resep rawat jalan dilakukan secara retrospektif pada periode di RSUDP NTB Januari-Desember 2018. Sebanyak 113 lembar resep dengan 312 item obat, diperoleh rata-rata jumlah obat perlembar yaitu 2,76%. Penggunaan obat generik sebesar 56,19%, persentase penggunaan antibiotik sebesar 0,01%, sedangkan peresentase penggunaan obat injeksi sebesar 40,72%. Berdasarkan hasil penelitian penggunaan obat injeksi memiliki nilai tinggi dibandingkan dengan nilai standar WHO dan obat generik dan antibiotik memiliki nilai rendah dibandingkan dengan nilai rujukan WHO. Natural B, Journal of Health and Environmental Sciences 2019-10-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/466 Natural B, Journal of Health and Environmental Sciences; Vol 5, No 2 (2019); 059-062 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/466/pdf

oai:natural-b.ub.ac.id:article/251 2018-12-13T07:25:20Z natural-b:ART

Geographically Weighted Regression Modeling with Fixed Gaussian Kernel Weighted on Spatial Data (Case Study of Food Security in Tanah Laut District of South Kalimantan) Munikah, Tutuk local multicollinearity; GWR; GWL; food insecurity Geographically Weighted Regression (GWR) is a regression model that takes into account the spatial heterogeneity effect. In regression models, often there is a relationship between two or more predictor variables is called multicollinearity. Geographically Weighted Lasso (GWL) is a method used to overcome spatial and spatial heterogeneity of local multicollinearity. The purpose of this study establishes the model by using the method of GWL in the case of spatial heterogeneity and overcome local multicollinearity on the issue of food insecurity in Tanah Laut district. Generally, food insecurity in Tanah Laut district is affected by the percentage of the population without access to electricity, the average number of store/grocery shop, and percentage of children under five and maternal mortality. GWL models obtained in accordance with the number of observation locations. The results validate the secondary data showed that the model obtained in the study are in accordance with the actual conditions in the field. Models with fixed weighting Gaussian Kernel is able to predict the eight villages with food security conditions are the same as the secondary data. Natural B, Journal of Health and Environmental Sciences 2014-04-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/251 10.21776/ub.natural-b.2014.002.03.15 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 296-302 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/251/210

oai:natural-b.ub.ac.id:article/103 2019-07-29T03:50:54Z natural-b:ART

Spatial Analysis and Multiple Regression Approach for Determining Soil Organic Material in Sampang Regency Pramoedyo, Henny Surya Wardhani, Ni Wayan Saraswati, Eka Rosilawati, Ria spatial analysis, regression An organic matter is one of the main components of soil. It is very potential to influence condition or type of soil and further it helps the growth of plants. One of methods which can be used to measure the levels of organic matters in an area is remote sensing technology and Geographic Information Systems (GIS) by using satellites. Analysis could be done in two steps. First, in statistically analysis by using regression models. The equation models of C-Organics level in -0,849 + 0,017X1 - 0.008X3 + 0.011X4.  Second, in spatial analysis, it is to know the C-Organic distribution, and also using interpolation with spatial analysis technique which is Inverse Distance Weighted (IDW) methods. Next, testing a model estimation which have been obtained in Sampang. Through the validation analysis using t-paired test, resulting estimation model which have been obtained is able to estimate the C-Organic levels in Sampang which could be an alternative way to estimate the C-Organic levels in same area. Natural B, Journal of Health and Environmental Sciences 2012-01-26 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/103 10.21776/ub.natural-b.2011.001.01.4 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 1 (2011); 27-34 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/103/99 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/103/2

oai:natural-b.ub.ac.id:article/287 2018-12-13T07:26:31Z natural-b:ART

Effect of Thickness on Thin Layer Resistance Value of Zinc Sulfophthalosianin (ZnPcSn) As Prototype of Ozone Detector Novitasari, Anggriana Masruroh, Masruroh Tjahjanto, Rachmat Triandi ZnPcSn thin film; PCB substrate; vacuum evaporation; thickness variations; resistance value Thin film of ZnPcSn was developed as a prototype for ozone detector. This study aimed to investigate the relationship thickness of thin film of ZnPcSn along with resistance value toward ozone exposure. The ZnPcSn thin film was deposited on a printed circuit board (PCB) substrate with various thickness using vacuum evaporation technique. The morphology of the thin film was observed using scanning electron microscope (SEM). The SEM images of ZnPcSn thin film showed that thicker layer of thin film leaded to greater pore and uniform distributed layer. To obtain the resistance value, ZnPcSn thin film was exposed to ozone for 30 minutes continuously. Ozone was synthesized by ozonator from air. Thicker film with higher ZnPcSn content had more intensive interaction with ozone. Higher interaction with ozone leaded to the increasing value of generated current, indicated by the decreasing of the thin film resistance value. This result demonstrated  that the ZnPcSn thin film has promising potential as ozone detector.  Natural B, Journal of Health and Environmental Sciences 2015-11-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/287 10.21776/ub.natural-b.2015.003.02.4 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 2 (2015); 124-129 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/287/243

oai:natural-b.ub.ac.id:article/335 2017-10-20T06:40:26Z natural-b:ART

Electrical Impedance Value Analysis on Formalinized Tilapia Fish Meat Putri, Rizka Rahmatie Agusta Widodo, Chomsin Sulistya Santoso, Didik Rahadi tilapia flesh; formalin,;frequency; electrical impedance Electrical impedance can be used as a non-destructive method to determine the bio-electrical characteristics on biological materials. Analysis of the electrical impedance value by using an electrode needle method has been applied to the tilapia flesh which aims to determine the bio-electrical characteristics on tilapia flesh, and determine the effect of formalin on it. The measurements were carried out to compare the characteristics of bio-electrical characteristics of the fresh tilapia flesh, the tilapia flesh soaked in formalin, and the one that was lay without any preservation treatment at a 10 Hz - 200 kHz frequency. The result shows that the impedance value characteristics of the fresh tilapia flesh decreased as long as the increase of frequency. Both the preserved and the rotten tilapia flesh have the decreased impedance value. The concentration of formalin immersion is directly proportional with the value of electrical impedance.   Natural B, Journal of Health and Environmental Sciences 2016-10-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/335 10.21776/ub.natural-b.2016.003.04.3 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 4 (2016); 286-291 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/335/pdf Copyright (c) 2016 Natural B

oai:natural-b.ub.ac.id:article/191 2019-07-29T03:41:08Z natural-b:ART

Effects of Gamma Radiation Exposure to Hematopoietic Cells on Bone Marrow Qomariyah, Nurul Rifa’i, Muhaimin Juswono, Unggul P. Gamma Radiation, Hematopoieitic, Phyllantus niruri L. Radiotherapy is a treatment for cancer which use external radiation sources with the aim to damage the DNA in the nucleus of the cancer chromosomes and cause necrosis of cancer cells. The exposure of radiation to the spinal cord as the site of blood cell formation would change the hematopoietic circulation system. The effect of gamma radiation exposure on decreasing of hematopoietic cells quantity is still unknown and it needs further experiment to determine the effect the radiation and the effect of P. niruri  extract giving on the reduction of immune cells quantity which are CD34+ and B220+ cells in the bone marrow. In this experiment, five variations of the dose radiation was used. The dose were 100 rad, 200 rad, 300 rad, 400 rad and 500 rad and use single dose of P. niruri as much 250 mg/kg BB. The dose of 100 rad radiation was given daily and P. niruri extract was given for 14 days before and during radiation. The amount of the CD34+ and B220+ cells is counted and analyzed by Flow cytometry. The result of this experiment showed that the giving of gamma ray irradiation reduced the amount of immune cells in the bone marrow. The increasing radiation dose was caused increasing of the reduction of cells immune quantity. The giving of P.niruri extract inhibits hematopoietic cell through increasing of the absolut amount of CD34+ cell in the bone marrow. Natural B, Journal of Health and Environmental Sciences 2013-05-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/191 10.21776/ub.natural-b.2013.002.01.4 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 1 (2013); 19-25 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/191/165 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/191/68

oai:natural-b.ub.ac.id:article/444 2018-12-13T07:19:56Z natural-b:ART

The CWT Feature's Uniqueness Analysis of EEG Signal Against 5 BCI Wheelchair Control Indicators Using the Friedman Method Firdaus, Ahmad Kanzu Syauqi Nadhir, Ahmad Naba, Agus BCI; EEG; CWT; metode Friedman The analysis of the feature’s uniqueness of the electroencephalograph (EEG) signal extracted by continuous wavelet transform (CWT) method against the five BCI wheelchair control indicators has been done. The usage of Friedman method as measuring the uniqueness level of EEG signal features as well as their significance is used in this research. The EEG signals from three subjects that sitting on a regular chair were recorded when they were performing mental commands as seem as controlling a wheelchair with five control indicators. The recorded signals are decomposed by CWT. The absolute mean (|µ|) and the deviation standard (σ) of the CWT decomposition results are used as feature. Then, the uniqueness of |µ| and σ features are analyzed using Friedman Method. Based on the experiment results, it is known that the proposed method is able to map features according to their uniqueness level. The experiment result shows that the highest uniqueness value of |µ| feature from three subjects are 400 (“forward – backward” indicators), 437 (“neutral – turn left” indicators), and 597 (“neutral – turn left” indicators) respectively. While the highest uniqueness value of σ feature from each subjects are 380, 419, and 568 respectively in the same indicator pairs as |µ| feature. Natural B, Journal of Health and Environmental Sciences 2018-12-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/444 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 4 (2018); 183-192 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/444/pdf

oai:natural-b.ub.ac.id:article/239 2018-12-13T07:25:20Z natural-b:ART

Monte Carlo Simulation to Determine Deposition Ratio of Dosage in a-SI Epid with Dose Deposition on Water Herwiningsih, Sri Rianto, Sugeng Yuana, Firdy a-Si EPID; Monte Carlo simulation; portal dosimetry; IMRT. The study aimed to explore the use of a-Si EPID as a dosimeter for IMRT delivery. The main objective of the study was to determine the ratio of dose deposited in a-Si EPID and the dose deposited in water. Linac used in the simulation was Electa Precise Linac and A-Si EPID model used in the study was based on the configuration of iView GT Elekta a-Si EPID. Study the characteristic of energy deposition at a-Si EPID and water detector shows that the energy deposition at a-Si EPID detector is higher than that of water detector at low photon energy (<0.1 MeV). This is caused by an enhancement of photoelectric interaction between photon beam and a-Si EPID detector at low energy X-rays. The simulation of dose deposition by using square fields show that the ratio between the dose deposition of a-Si EPID and the dose deposition of water detector (α) increases with an increase of the field size. The value of α ranges from 0.60 – 0.66. The similar result was shown in the simulation of dose deposition by using IMRT beam, in which the value of α ranges from 0.63 – 0.64. The α value is useful to relate the measured dose from detector to the equivalent dose of water, which is often used as a reference medium in radiotherapy dosimetry.   Natural B, Journal of Health and Environmental Sciences 2014-05-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/239 10.21776/ub.natural-b.2014.002.03.1 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 201-208 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/239/199

oai:natural-b.ub.ac.id:article/277 2018-12-13T07:26:18Z natural-b:ART

Influence of Rice Seed Replanting Growth (Oryza sativa L.) Inpari-4 Varieties with Giving Frequency of Sound Waves Bahtiar, Bahtiar Widodo, Chomsin S. Santoso, Didik R. Frequency sound waves; germination; rice. Has done research that aims to examine the influence of sound wave frequency of rice seeds of the shoots phase. Rice seeds Inpari-4 varieties planted at four growing medium in the sterofoam box with the treatment of the different frequncies of 10 Hz, 4 kHz, 7 kHz, 30 kHz and one growing medium without sound treatment which serves as the control plants.  The test parameters were often observed as an indicator of plant, a lot of leaves, wet and dry weight of roots, root lenght, moisture content and test unison is growing. The result showed that there is a sound wave frequency value responded well by rice seed shoots in the process so that its growth into the optimal frequency of 4 kHz.  Natural B, Journal of Health and Environmental Sciences 2015-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/277 10.21776/ub.natural-b.2015.003.01.7 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 1 (2015); 053-058 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/277/234 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/277/123

oai:natural-b.ub.ac.id:article/144 2019-07-26T03:57:40Z natural-b:ART

Antagonist Mold Exploration of Phytophthora spp. Pathogen on Apple Plant Nugrahani, Meisarina Suharjono, Suharjono Endarto, Otto antagonist, apple, mold, Phytophthora sp The attack of Phytophthora spp. caused the descrease of apple crops production up to 90 %. Some antagonist mold species are able to inhibit the growth of Phytophthora pathogens onapple crops. The objectives of this research were to identifify and to study the potency of antagonist mold for inhibite the growth of Phytophthora spp. pathogens on apple crops. The Phytophthora spp. were isolated using baiting method with apple fruit  while antagonist molds were isolated by dilution method from soil sample of apple plantation. The inhibition assay of antagonist molds against Phytophthora was carried out by dual culture method. The isolated both of Phytophthora spp. and antagonist mold isolates were identified based on phenotype characters. The research result showed six molds namely Trichoderma sp.1, Trichoderma sp.4, Trichoderma sp.6, Aspergillus sp.2, Aspergillus sp.3 and Penicillium sp.1 which were antagonist on the Phytophthora pathogens onapple crops. Among the antagonist mold species, Trichoderma sp.6 had the highest inhibitory potency (62.95 %) while Penicillium sp.1 had the lowest inhibitory potency (28.82 %) against the growth of Phytophthora.  Natural B, Journal of Health and Environmental Sciences 2012-06-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/144 10.21776/ub.natural-b.2012.001.03.4 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 3 (2012); 214-221 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/144/131

oai:natural-b.ub.ac.id:article/381 2018-12-13T07:27:17Z natural-b:ART

Determination of Wurung Crater Surface Temperature - Ijen East Java Using Landsat Image 8 as A Preliminary Study In the Geothermal Exploration Survey Ermanto, Surya Aji Maryanto, Sukir Susilo, Adi Has conducted research using remote sensing methods being located in the mountain complex Ijen, Bondowoso - Banyuwangi, East Java as preliminary data to assist in the design of geothermal exploration survey. Remote sensing data used are images from Landsat 8. Landsat 8 infrared thermal image is processed as land surface temperature data. Processing land surface temperature using a single band. Methods in this study begins with finding NDVI (Normal Differential Vegetation Index), which is the value used to state how dense vegetation in an area. After it obtained the value of the fraction of vegetation and emissivity of land used for the determination of the distribution of land surface temperatures. The surface temperature of this land will be used as a guide in making the design of a geophysical survey in geothermal exploration further. Because geothermal areas associated with land surface temperatures were relatively high. Based on the results of data processing of remote sensing, land surface temperatures were relatively high in the area around the Kawah Wurung and Girimulyo that has a land surface temperature ranges between 3060ºC. Natural B, Journal of Health and Environmental Sciences 2017-04-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/381 10.21776/ub.natural-b.2017.004.01.7 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 1 (2017); 50-56 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/381/pdf Copyright (c) 2017 Natural B

oai:natural-b.ub.ac.id:article/180 2019-07-29T03:22:08Z natural-b:ART

Measurement of PM2.5 Concentration at the Photocopy Machine Center at Brawijaya University Environment Wardoyo, Arinto Y. P. Juswono, Unggul P Sitanggang, Rowinda Air pollution, Copy center, PM2,5, Indoor Air Quality Air pollution is one of matters that faced by all states in this world. In outline air pollution can be distinguished into two there are outdoor pollutant and indoor pollutant. Material or substance which can pollute the air could organized as gas and particle. One source of indoor pollutant is photocopy machine. This study presents the measurements of PM2,5 concentration at several copy centers in Brawijaya University. The aims were to measure the PM2,5 concentrations at the eight copy centers using the Kanomax Mass Monitor Piezobalance 3522. The results from nine hours average PM2,5 value as that during business ranged from 0,02-0,09 mg/m3. The showed that the six of the 8 copy centers having the PM2,5 concentration more than the Indonesia governments air quality standard of 0,035 mg/m3 at 24 hours. Natural B, Journal of Health and Environmental Sciences 2012-11-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/180 10.21776/ub.natural-b.2012.001.04.9 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 4 (2012); 352-356 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/180/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/180/58 Copyright (c) 2012 Natural-B

oai:natural-b.ub.ac.id:article/404 2018-06-06T04:34:31Z natural-b:ART

Effect of Stirring Speed on Characteristics of Fe3O4 Nanoparticles Coated with Polyvinyl Alcohol and Glutaldehyde as a Crosslinker Rahayu, Lale Budi Hutami Wulandari, Ika Oktavia Santjojo, Djoko Harry Sabarudin, Akhmad Nanoparticles, Magnetite (Fe3O4), Copresipitation, Polyvinyl Alcohol, Glutaraldehyde Research on Fe3O4 nanoparticles is mostly done because of the unique nature of Fe3O4 which has magnetic properties, non-toxic, biocompatible and easily degraded so it is interesting to investigate as a drug delivery system. This nanoparticles were successfully synthesized by coprecipitation method with variations of stirring rate were 180 rpm (sample A), 250 rpm (sample B) and 320 rpm (sample C). FTIR analysis of Fe3O4 nanoparticles, was absorption at ~585 cm-1 for samples A and B showing the presence of Fe-O magnetite bond and absorption at ~623 cm-1 which were not very sharp for maghemite. However the sample B, only absorption at ~623 cm-1 which is sharp for maghemite (γ-Fe2O3) because of Fe2O3 cubic is not formed. SEM analysis did not show significant morphological differences in velocity variation. From XRD analysis known that the crystal size for samples A and B respectively of 6.4192 nm and 9.5513 nm for sample C could not be calculated because of many iron oxide phases present in it, so it is difficult to find FWHM. ESR analysis of nanoparticle samples shown Fe3O4 properties were ferromagnetic. Natural B, Journal of Health and Environmental Sciences 2018-06-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/404 10.21776/ub.natural-b.2018.004.03.1 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 3 (2018); 127-134 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/404/pdf Copyright (c) 2018 Natural B

oai:natural-b.ub.ac.id:article/224 2019-07-29T07:22:02Z natural-b:ART

Biodegradable Plastics Functional Groups Methyl Acrylate and Pati Garut Relationship Against Mechanical Properties Iswarin, S J Nuriyah, Lailatin Sriwilujeng, A I biodegradable plastic; plastics packaging; grafting methods In order to addressing the problem of plastic waste accumulating, we made biodegradable plastic from starch with methyl acrylate as initiator. The biodegradable plastics are made by grafting method on a variety of arrowroot starch composition and methyl acrylate. Variations in the composition of arrowroot starch and methyl acrylate used was 30:70; 35:65; 40:60; 45:55; and 50:50.Results of the mechanical tests e.g. tensile strength and percent elongation on plastics, show that the best value is obtained on the composition of 30:70. It reaches of (14.8 ± 2.8) MPa in tensile strength, and (5.33 ± 0.08) % in elongation percent. This value is in accordance with the results of FTIR analysis.  In here, the value of tensile strength is consistence with the value of absorbance of methyl acrylate, which indicates the concentration of functional groups C-C or the number of functional groups that formed. The greater of the concentration will be the greater of the tensile strength, while the percent elongation values are influenced by the number of functional groups C-O-C formed by arrow root starch. Natural B, Journal of Health and Environmental Sciences 2013-12-12 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/224 10.21776/ub.natural-b.2013.002.02.13 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 2 (2013); 178-183 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/224/188 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/224/94

oai:natural-b.ub.ac.id:article/266 2018-12-13T07:25:35Z natural-b:ART

Effects of Gamma Radiation Exposure and Giving of Green Bean Sprout Extract (Phaseoulus radiatus) to Gonad Animal Fertility Rate of Mice Kamlasi, Feris Juswono, Unggul P. Gamma radiation, Phaseoulus radiatus extract; gonad fertility rate; mice Gamma rays is an ionizing radiation that can causes infertilities.Cell defense mechanism against free radicals are involving active compound called antioxidant. Goal of this research is aim to analyze the influence of gamma radiation and review the influence of green beansprout extract (Phaseoulus radiatus) in gonad fertility rate with threevariables there are motility, viability and abnormality of spermatozoa. Male mice divided into three groups, control (K), non-extract radiation (RNE), and radiation plus extract (R+E).Mice was treated orally by green bean sprout extract with several dose 0.2 mL kg-1 body weight, 0.4 mL kg-1 body weight, 0.6 mL kg-1 body weight, 0.8 mL kg-1 body weight, and 1.0 mL kg-1 body weight. Radiation was given by fractionation starting from 100 rad, 150 rad, 200 rad, 250 rad, and 300 rad.The result shows that increasing radiation dose can reducing gonad fertility rate and treatment of Phaseoulus radiatus extract can suppress this reduction and preserve gonad fertility rate.  Natural B, Journal of Health and Environmental Sciences 2014-10-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/266 10.21776/ub.natural-b.2014.002.04.14 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 4 (2014); 380-386 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/266/225 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/266/115

oai:natural-b.ub.ac.id:article/121 2019-07-29T03:53:06Z natural-b:ART

Calcium Oxalate Crystals (CaOx) on Porang (Amorphopallus muelleri Blume) Exposed and Unexposed Sun Chairiyah, Nurul Harijati, Nunung Mastuti, Retno Porang, Shade, CaOx crystals, Density of crystals, Variation shape of crystals Sunlight was suspected to affect CaOx crystal formation in porang. This research had aim to determine variations in forms of CaOx crystals and the influence of shade on the density of CaOx crystals in porang. Preparations for microscopic observation derived from sliced leaf, petiole, and tuber of porang that grown under shaded and exposed to sunlight conditions. Sliced organ was cleared by using the modified clearing method. The parameters that observed included shape, shape variety, and density of CaOx crystals. CaOx crystal density were analyzed using ANOVA followed by Tukey (α 0.05). The differences of crystal density between the edges and middle of the organ were analyzed using Paired Samples T Test. Microscopic observation showed that CaOx crystals were grouped into large (20-710 m) and small (1-15 m) crystals size. The density of CaOx crystals in plants exposed to sunlight was 3 times higher than the shaded plants. Leaf organ had the highest number of crystal compared to others organ. The tuber had the lowest density of CaOx crystals among organ. In addition, the shaded or exposed to sunlight condition had no effect on CaOx crystal density between the edges and center of the organ. Natural B, Journal of Health and Environmental Sciences 2012-01-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/121 10.21776/ub.natural-b.2011.001.02.6 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 2 (2011); 130-138 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/121/118 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/121/22

oai:natural-b.ub.ac.id:article/158 2019-07-26T03:57:41Z natural-b:ART

Geomagnetic Survey In Cangar Area, Batu City, East Java To Assess the Potential of Geothermal Afandi, Akhmad Maryanto, Sukir Susilo, Adi geothermal, Cangar, geomagnetic, susceptibility The prospect ofgeothermal field of Cangar’s in Batu, East Java has been observed based on the geomagneticmethod using aProtonPrecisionMagnetometer (PPM-856).The purpose is to know the magnetic anomalies around the geothermal area. The resultsshown that the residual anomaly distributed in the range of -1.000 nT to 680 nT and the low anomaly(negative) at about -1.000nTlocatedonthe northand westof themanifestations ofhotwater. Geothermalpotential based on the subsurfacemodeling of the structures on the line A-B at position 49 M 0669,071.13174 mT UTM 9,144,184.60107 mU has a value of susceptibilitycontrast of -3.166with a volume of ± 1,550,345m3. Furthermore, on the line C-D at position 49 M 0669,168.601085 mT UTM 9,143,915.10292 mU shown a value of susceptibilitycontrast at -0.018with thevolume of ± 16,610m3. Natural B, Journal of Health and Environmental Sciences 2012-04-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/158 10.21776/ub.natural-b.2012.001.03.15 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 3 (2012); 288-296 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/158/142

oai:natural-b.ub.ac.id:article/388 2018-12-13T07:27:17Z natural-b:ART

Spectral and Waveform Cross-Correlation Analysis of Volcanic Tremor from The 2016 Eruption at Bromo Volcano, East Java Arisalwadi, Meidi Maryanto, Sukir Triastuty, Hetty seismic, tremor, spectral, spectrogram, waveform cross correlation Bromo volcano is one of a series of active volcanoes in Indonesia, located on the Tengger caldera, Probolinggo, East Java. Bromo volcano has increased volcanic activity in the end 2015 until early 2016. The research was conducted to determine the characteristics of volcanic tremors. The methods used to determine the characteristics of volcanic tremors are spectral analysis and cross-correlation waveform analysis. Spectrogram analysis obtained frequency value 1-8 Hz for volcanic tremor of Bromo Volcano. From the results of spectral analysis volcanic tremor, it’s can be seen the value of the frequency peaks irregular means the type of spasmodic tremor. Based on the pattern of the peaks of the tremor spectral analysis using 3 stations having the same pattern and the analysis of cross-correlation waveform volcanic tremor of Bromo volcano was indicated from the same source mechanism because the correlation coefficient value is good that ranged about 0.6 – 0.8. Natural B, Journal of Health and Environmental Sciences 2017-04-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/388 10.21776/ub.natural-b.2017.004.01.8 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 1 (2017); 57-64 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/388/pdf Copyright (c) 2017 Natural B

oai:natural-b.ub.ac.id:article/214 2019-07-29T07:22:02Z natural-b:ART

Variant Clustering Analysis Amorphophallus muelleri Blume Found in East Java Based on Molecular Marking CslA Mannan Synthase Encoder with PCR-RFLP Technique Priyanti, Novie Ary Arubil, Arik Arumningtyas, Laras Estri Azrianingsih, Rodiyati Amorphophallus muelleri Blume; Porang; PCR-RFLP; Clustering Amorphophallus muelleri Blume is a ubiquotus plant found all over Indonesia and has the potential to be food substitute due to its high glucose content. This research was conducted to investigate the porang’s clustering based on CslA gene glucose coding by using PCR-RFLP technique. Porangs used as the subjet of this study were obtained from 4 different locations in East Java, wich are : (1) Nganjuk, (2) Madiun, (3) Blitar and (4) Jember, analysed by morphological characteristic and molecular traits. Morphological analysis showed that porang derived based on their stalk pattern. BlitarI, JemberI, MadiunI variant have large prismatic stalk patterns, Jember1 and Nganjuk2 have a tight prismatic stalk pattern. Glucomannan content analysis showed that highest content is from Blitar2 5,469% and the lowest is Madiun2 0,2313%. The amplification of CslA gene sequence using primary AkCslA680F and AkCslA1288R showed that CslA gene sequence was amplified on 200 bp. The cutting by using HaeIII restrictive enzyme produced two monomorphic band on 1000 bp and 2000 bp, and 8 polymorphic band on 100 bp-400 bp. The result of this analysis showed that porang had high diversity. The analysis of among variants clustering based on their molecules data showed that grouping fell into 3 clusters, which were: cluster I (JemberI, BlitarI and MadiunI variants), cluster II (Jember2, Blitar2 and Nganjuk2 variants) and cluster III (Blitar2 variant). The shortest distance was found between JemberI and BlitarI variants, while the furthest was found in Blitar2 variants.  Natural B, Journal of Health and Environmental Sciences 2013-12-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/214 10.21776/ub.natural-b.2013.002.02.4 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 2 (2013); 122-127 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/214/179 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/214/86

oai:natural-b.ub.ac.id:article/256 2018-12-13T07:25:35Z natural-b:ART

PFRET Measurements Using Sensitized Emission Methods in Observation of Calcium Changes in Oocytes Nanasari, Nathania Santjojo, Djoko Herry Widodo, Chomsin Sulistiya Soepriandono, Hari FRET; sensitized emission; PFRET; calsium; fluo-3 Fluorescence Resonance Energy Transfer (FRET) is a process of non-radiative energy transfer from donor molecule to an acceptor. We expect to know the quantitative FRET measurements in immature and mature goat oocyte with the presence of calcium. FRET was detected using a laser scanning confocal microscope. We assume that calcium as a donor and fluo-3 as an acceptor. The methods of sensitized emission have been used for quantitative FRET measurement. We also describe the precision FRET (PFRET) data analysis. The value of PFRET describe the presence of calsium in immature and mature oocytes. For these immature and mature oocytes, the results of PFRET are 622,5 and 754,57 respectively. Mature oocyte has more calsium than immature oocyte. Natural B, Journal of Health and Environmental Sciences 2014-10-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/256 10.21776/ub.natural-b.2014.002.04.5 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 4 (2014); 327-330 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/256/215 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/256/106

oai:natural-b.ub.ac.id:article/111 2019-07-29T03:50:55Z natural-b:ART

Local Fault Line Tracing in Sri Mulyo Village, Dampit Sub District, Malang Regency Based on Geophysical Data Wasis, Wasis Sunaryo, Sunaryo Susilo, Adi Searching, local fault, pseudo-depth section A research has been conducted for searching local fault at Sri Mulyo Village, Malang Regency, to get the physical parameters of 3-dimension fault, which include depth, width, length, and direction. The research is based on the preliminary research that results geological data interpretation, gravity, and outcrops.  The survey used resistivity parameter by applying pseudo-depth section configuration (4 electrodes). Data processing and interpretation using inverse method.  By combining every pseudo depth section, 3-dimension physical parameters will be acquired square error is 2.51x10-27. Natural B, Journal of Health and Environmental Sciences 2011-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/111 10.21776/ub.natural-b.2011.001.01.6 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 1 (2011); 41-50 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/111/109 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/111/11 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/111/12

oai:natural-b.ub.ac.id:article/292 2018-12-13T07:26:31Z natural-b:ART

Estimation of Reservoir Rock Formation and Hood Stone in Manifestation Area of Tulehu Salahutu Healer - Ambon Island Based on Magnetic Survey Jufri, Jufri Sunaryo, Sunaryo Susilo, Adi Tulehu geothermal; magnetic survey; reservoir rock; cap rock The magnetic survey has been done in the area of geothermal manifestations Tulehu, Salahutu, Central Maluku in Ambon Island which has high temperature reservoir. The aim of this research was to know the formations reservoir and cap rock in the area of geothermal manifestations Tulehu. The measurement of data is done using magnetometer PPM type G-856, in the area of around the hot springs Hatuasa Tulehu broadly of 1.78 km x 1.25 km, which consists of 238 measuring points with spacing 50 m. Data processing to begin with IGRF correction, diurnal correction, flat surface reduction, upward continuation and reduction to the pole. Interpretation was based on three cross - section models: slice AB, BC, and DE. The modeling of the results indicates the presence of caprock formations suspected as alluvial (Qa) with susceptibility contrast 0.0102 SI to 0.0416 SI, whereas the reservoir rocks formation is suspected rocks of volcanic Ambon (Tpav) had been around demagnetization with susceptibility contrast 0.0001 SI, in the deepness of 1850 m to 2775 m the surface below. Natural B, Journal of Health and Environmental Sciences 2015-11-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/292 10.21776/ub.natural-b.2015.003.02.9 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 2 (2015); 158-165 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/292/248

oai:natural-b.ub.ac.id:article/149 2019-07-26T03:57:40Z natural-b:ART

Earthquake Characteristics of Mount Semeru Eruption, East Java Year 2009 Anik Perwita, Cholisina Maryanto, Sukir Budianto, Agus explotion earthquake, Semeru volcano, frequency, hypocenter Type of eruption during the year 2009 can be classified into three types. Type I is a visual explosion that manifested by the eruption of contain volcanic material. Type II is the eruption of the manifestated by fog. Type III is the eruption that occurred during lava dome growth. Spectral and hypocentre analysis has been done used four seismic stations Kepolo (KPL), Leker (LEK), Tretes (TRS) and Besuk Bang (BES). From the analysis found that the correlation between visual eruption and frequency indicates that the seismic eruptions have type I has a frequency 0.87 to 3.8 Hz frequency, seismic eruption of type II has a frequency 0.87 to 2.64 Hz frequency, while the seismic eruptions type III  has a frequency 1.06 to 2.73 Hz. Result of study shows hypocenter is located at a depth of 0.90-1.47 km below the crater, interpreted as shallow magma pockets. Described based on the seismicity of 2009. Activities eruption caused by changes of pressure in deep and shallow magma pockets. The eruption process is more controlled by increase of pressure in the shallow magma pockets Natural B, Journal of Health and Environmental Sciences 2012-06-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/149 10.21776/ub.natural-b.2012.001.03.6 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 3 (2012); 229-234 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/149/133

oai:natural-b.ub.ac.id:article/337 2017-10-20T06:58:07Z natural-b:ART

Potential of Sugar Cane As an Alternative Raw Material for Making Activated Carbons Hidayati, A.S. Dwi Saptati Nur Kurniawan, Silva Restu, Nalita Widya Ismuyanto, Bambang bagasse; activated karbon; carbonization; activation; adsorption This research studied to utilize the bagasse to be used as activated karbon in particular for the adsorption of Ca2+. The manufacture of activated carbon consists of carbonization dan activation process. Temperature variation for carbonization process in this research are 500°C, 550°C, 600°C, 650°C and 700°C then proceed with the activation process by carbon reflux with 6 M H2SO4 for 4 hours. Carbonization yield will decrease with increasing temperature carbonization. While the ash content, surface area, pore volume, and adsorption capacity of Ca2+ will increase with increasing temperature of carbonization. Obtained activated carbon is best activated karbon made at a temperature of 700°C with an activation carbonization which has a surface area 100.62 m2/g, 22.3750 Å pore diameter, pore volume of 22.376 mL/g, can eliminate the Ca2+ up to 13.26 %. Natural B, Journal of Health and Environmental Sciences 2016-10-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/337 10.21776/ub.natural-b.2016.003.04.8 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 4 (2016); 318-322 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/337/pdf Copyright (c) 2016 Natural B

oai:natural-b.ub.ac.id:article/197 2019-07-29T03:41:08Z natural-b:ART

Determination of Seismicity with Grid Searching Method (Case Study of Gempabumi Pulung, Ponorogo Regency February 2011) Sili, Petrus Demon Susilo, Adi Maryanto, Sukir Earthquake, Epicenter, Seismicity, Pulung. Pulung Region, Ponorogo major city, Indonesia is one of the area in Indonesia which is prone of the local earthquake threat. Since 1963, there was about 7 big earthquakes, where 1 earthquake was destroyed earthquake and 2 events occured at the Pulung region. The two those earthquakes occured at Pulung were in 1993 and 1999, with the magnitude was 3.7 SR  and 5.6 SR respectively. The last event was on February 2011, therefore it’s necessary to study and determine the  seismicity. In addition the relocation analysis using Grid Searching seismicity showed that the distribution of earthquakes shifted to the East direction, with the coordinat of from  7.8122º to 7153º SL and 111.6360o to 111.7303° EL, the depth of earthquakes varies between 0.532 km and 7250 km, and the magnitude was between 1.4 and 2.0 SR. It is hoped that this result can be used for the govermnment of Ponorogo to mitigate of earthquake impact. Natural B, Journal of Health and Environmental Sciences 2013-05-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/197 10.21776/ub.natural-b.2013.002.01.9 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 1 (2013); 58-65 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/197/170 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/197/73

oai:natural-b.ub.ac.id:article/457 2019-06-20T08:36:18Z natural-b:ART

Identification of Aquifers Distribution using Geoelectric-Resistivity Method with Schlumberger Configuration in Gedangan Village, Malang Regency Faris, Ahmad N. Suaidi, Daeng A. Sutrisno, Sutrisno Hasan, Muhammad Fathur Rouf Broto, Agung B. geoelectric; resistivity; Schlumberger; karst; limestone; Gedangan. Drought is one of the problems in Gedangan Village during the dry season. So that district needs more groundwater resources. The geoelectric-resistivity method usually used for groundwater exploration. This method used for identifying changes in the resistivity of rock layers beneath the earth's surface by flowing direct current (DC). This research intends to identify the pattern of groundwater distribution using the geoelectric-resistivity method with Schlumberger configuration in Gedangan Village, Gedangan District, Malang Regency. Thirteen VES points were obtained by Schlumberger configuration and each long stretch until 400 m. Then each the two parallel VES points arranged to obtain a 2D cross-section. The results indicate this area surrounded by karst and it has lithology consists of sandy marlstone, claystone, and limestone. The resistivity value is between 1.41 - 8.28 Ωm identified as sandy marlstone and it presumed as an aquifer. The aquifers with large amounts of groundwater are in the VES point lines of 01-02, 03-04 and 04-05. These lines are located in the south of the Gedangan district office and the police station. Natural B, Journal of Health and Environmental Sciences 2019-04-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/457 Natural B, Journal of Health and Environmental Sciences; Vol 5, No 1 (2019); 28-34 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/457/pdf Copyright (c) 2019 2019

oai:natural-b.ub.ac.id:article/247 2018-12-13T07:25:20Z natural-b:ART

Anatomical Variation on Some Wood Collected from Meru Betiri National Park Indriyani, Serafinah Anatomy; Meru Betiri National Park; microscope; wood, xylem Some plants that have wood economically value are found at Meru Betiri National Park, such as nyampuh (Litsea monopetala (Roxb.) Pers.), bayur (Pterospermum javanicum Jungh.), gempol kethek (Lophopetalum javanicum (Zoll.) Turcz.), suren (Toona sureni Merr.), sapen (Pomentia tomentosa T. & B.), manting (Eugenia cymosa Lamk.), pluncing (Spondias pinnata (L.F.) Kurz.), mahoni (Swietenia macrophylla King), and bungur (Lagerstoemia speciosa Pers.).  Anatomically, wood has specific and unique structure. Wood is a secondary xylem that consist of tracheary elements such as vessel and tracheid, fibers such as fiber-tracheid and libriform fiber, and parenchyma cells (ray system). The pattern of wood section is affected by intrinsic factors. Wood was sectioned in 2X1 cm² in measurement and then it was boiled during 1 hour, after that it was immersed in mixed solution glycerin and absolute alcohol (1:1) during several weeks until the wood smooth adequately to sliced. Wood was sliced by sliding microtome 20-25 µm in thickness, and then it was placed on the objectglass that contain glycerin and covered by coverglass, after that it was observed by microscope. There was anatomically variation of wood samples that observed, involved trachea and tracheid width, also schlerenchyme fiber length. Vessel of nyampuh is the biggest in diameter (35±4.7 µm), and parenchyma ray of suren is the longest in length (70±9.3 µm) among other species. Natural B, Journal of Health and Environmental Sciences 2014-04-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/247 10.21776/ub.natural-b.2014.002.03.9 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 261-265 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/247/204

oai:natural-b.ub.ac.id:article/470 2020-12-14T04:07:50Z natural-b:ART

oai:natural-b.ub.ac.id:article/282 2018-12-13T07:26:18Z natural-b:ART

Spatial Modeling Weibull-3 Survival Parameters with Frailty Distributed Conditionally Autoregressive (CAR) Mahmudah, Nur Pramoedyo, Henny dengue hemorragic fever; Bayessian; spatial survival Weibbul-3P, frailty distributed conditionally autoregresive (CAR); queen contiguity and Moran’s I Survival analysis is a collection of statistical procedures for data analyzing, where respon variables caused by time until an event occurs. One of application of survival regression’s purpose is to know dengue hemorragic fever. Since the spread of dengue hemorragic fever caused by the spread of mosquito, there is probability that event in one location affects other event in another locations thus, it is better to model with Bayessian method of spatial survival. Model includes random spatial effect CAR to overcome the spatial effect in survival model using queen contiguity type weight. This study aimed to obtain spatial survival model one survival data year of 2013 which was the event of dengue hemorragic fever in city of Malang. Based on the data, moran value I was -0.5930 with Z-test value equal to -2,002, which means there is a spatial autocorelation on the event of dengue hemorragic fever in city of Malang. Spatial survival model with Weibull-3 Parameter (Weibull-3P) distribution obtained the factors significantly affecting dengue hemorragic fever, which were sex, hematrocit rate, thrombocyte volume had equal rate of healing in each subdistrict.   Natural B, Journal of Health and Environmental Sciences 2015-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/282 10.21776/ub.natural-b.2015.003.01.12 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 1 (2015); 093-102 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/282/239 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/282/128

oai:natural-b.ub.ac.id:article/313 2018-07-13T02:59:32Z natural-b:ART

Accuracy Evaluation Activities Tc-99m in Single Organ and All Organ using Gamma Camera Mediso AnyScan Dual Head S and Anthropomorphic Phantom Utaminingtyas, Diah Shanti Noor, Johan A. E. Hidayati, Nur Rahmah the accuracy of activities; radiopharmaceutical Tc - 99m; MIRD method In term of nuclear medical, Radiopharmaceuticals with Tc - 99m radioisotope for kidney examination inserted into the body will emit gamma radiation that can be detected by a gamma camera. Gamma camera will display the distribution of radioisotopes in the patient's body and measure examined organ function in the form of image. A committee in nuclear medical developed Medical Internal Radiation Dosimetry (MIRD) method, the standard method on the way calculating activities in organ by image quantification. Differences in the activity of Tc-99m were measured by a dose calibrator with detected activity of organs to determine the accuracy of activity measurement. These results indicated that detected activity in the organ, calculated by the method MIRD, were smaller than the calibrator measurement result. The differences percentage in the activity of a single organ (counting each organ), involving all organs (enumeration simultaneously including kidney, bladder, heart and liver), has value <20% that indicate the reliability of MIRD method to use in internal dosimetry. Natural B, Journal of Health and Environmental Sciences 2016-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/313 10.21776/ub.natural-b.2016.003.03.07 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 3 (2016); 247-252 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/313/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/313/135 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/313/136 Copyright (c) 2016 NATURAL B

oai:natural-b.ub.ac.id:article/186 2019-07-29T03:22:08Z natural-b:ART

Allergenity Test of Porang Bulb Variant (Amorphophallus oncophyllus Hook.) By ELISA Ig-E Method Permana, Sofy Widyarti, Sri Indriyani, Serafinah Siswanto, Dian Soewondo, Aris Porang, Alergy, ELISA, Ig-E Porang (Amorphophalus oncophyllus Hook.), a tuber plant, is intensively explored for export commodities from East Java and as a raw food stuff material for domestic industry. The prospects of Porang tubers as the healthy food is interesting, however some studies are needed for their allergy effects. It was thought that the allergy effects of Porang are caused by the composition of Calcium Oxalate crystal that leads the itching and irritation in the mouth. On the other hands, the food allergy is usually caused by unchanged protein during food digesting.  Some proteins have been known that play a role in Calcium Oxalate crystal (Matrix proteins) formation, they are: Asp-rich and Ser-rich acidic proteins that are tightly bound to Calcium. So, substantially the allergen of Porang tuber is from the matrix protein, not from its crystal. The allergen in the food is usually a protein that is not change during the food digestion. In this study, it has been done the allergic test of some Porang tuber variants, namely: Sumber Baru-Jember; Klangon, Saradan-Madiun and Sumber Bendo, Saradan-Madiun, by ELISA-IgE from rat’s blood serum that have been orally treated by raw Porang tubers powder before.  The SDS-PAGE analysis shows that the proteins bands profiles are similar between raw and steamed Porang tubers (appearance Molecular Weight: 18 and 15 kDa). But, those raw Porang tubers bands are thicker than the steamed ones. The thickness of those raw Porang tubers decrease from 25 to 50 %, compare to those steamed ones. It means that the steaming of Porang is effective to decrease the potential allergy of Porang for consumptions. The allergic test analysis by ELISA-IgE revealed that the potential allergy of Porang are: Sumber Baru (Jember) > Porang var. Klangon - Saradan (Madiun) > Porang var. Sumber Bendo - Saradan (Madiun), respectively. Natural B, Journal of Health and Environmental Sciences 2012-11-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/186 10.21776/ub.natural-b.2012.001.04.14 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 4 (2012); 386-394 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/186/161 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/186/63

oai:natural-b.ub.ac.id:article/420 2018-12-13T07:19:56Z natural-b:ART

The Relationship Between Honey's Floral Origins and The Electrical Impedance of Honey Variants Indriyani, Vivien Dwi Santoso, Didik Rahadi Widodo, Chomsin Sulistya honey; honey's floral origins; impedance; ash content. One of the factors that influence the composition of honey is the plant that became the source of nectar. Honey derived from one plant species has a different composition with honey from other plant species. This study aims to analyze the effect of the origin of honey flower on the value of electrical impedance by using impedance spectroscopy and to analyze the relationship between ash content and electrical impedance in honey. This study used four gold needle electrodes and a set of PicoScope 5244B tools to measure the value of honey impedance. Measurements are made by injecting a current of 10 μA and using frequencies 1 Hz to 2 MHz. This study also measured ash content in honey. The sample used is kelengkeng, kaliandra, randu, coffee, and rubber honey. The results showed that the origin of honey flower affects the value of electrical impedance. The relationship between impedance and ash content is the smaller the ash content in honey the impedance value is greater. Natural B, Journal of Health and Environmental Sciences 2018-12-13 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/420 Natural B, Journal of Health and Environmental Sciences; Vol 4, No 4 (2018); 161-165 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/420/pdf

oai:natural-b.ub.ac.id:article/238 2018-12-13T07:25:20Z natural-b:ART

Drought Resistance Variation of Mutant of Kenaf KR11 Based on Prolin Accumulation Marsita, Rahmi Arumingtyas, Estri Laras Kenaf; drought; mutant; proline accumulation Kenaf is a fiber plants of the family Malvaceae. KR 11 is a high yielding kenaf variety which is resistant to drought stress. Mutations by EMS at several species known to increase resistance to drought stress by accumulation of osmolite. In this research, physiological testing on 5 mutants to determine the effect of the mutation on the drought stress response of kenaf KR 11was conducted. Experiment were done by comparing the physiological accumulation of proline in normal and drought stress conditions. The plants were watered every 3 days for 14 days with 100% of field capacity as normal conditions and 25% field capacity as drought stress. The results showeddifferences inthe pattern ofprolineaccumulationbetweencontrolandmutant in normal and drought stress condition. While control KR11 increased the accumulation on drought condition, mutants showed decreasedprolin content under conditions of stresswith varying decreasing levels. The mostsignificant pattern ofproline accumulationcompared with control, is shownby themutant4and5. Prolin accumulation pattern is controlled by the proline metabolism control genes, P5CS and ProDH and its feedback regulation. Alteration of this pattern is most likely an effect of mutation induction on the mutant sample. Natural B, Journal of Health and Environmental Sciences 2014-04-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/238 10.21776/ub.natural-b.2014.002.03.10 Natural B, Journal of Health and Environmental Sciences; Vol 2, No 3 (2014); 266-270 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/238/206

oai:natural-b.ub.ac.id:article/273 2018-12-13T07:26:18Z natural-b:ART

Synthesis of 2-Methoxy-3H-Azepine Derived Compounds Through the Thermal Reaction between Alkylnitrobenzene and Tributylphosphine Ulfa, Siti Mariyah Okamoto, Hideki Satake, Kyosuke azepine; cyclisation; intramoleculer reaction; photolysis; tributhylphosphine; nitrobenzene. Although photolysis of phenyazide has been widely reported to give 3H-azepine, the thermal deoxygenation reaction of alkylnitrobenzene derived similar products hitherto unexplored. Novel synthesis of 2-methoxy-3H-azepine derivatives was carried out using alkylnitrobenzene with tributylphosphine (Bu3P) reacted at 150°C for 24 hours in the presence of methanol. Reaction of m-nitrobenzene with the above methods gave two isomers of 3H-azepine, namely, 2-methoxy-6-methyl-3H-azepine and 2-methoxy-4-methyl-3H-azepine in 61%. Reaction of 2,3-dimethylnitrobenzene with Bu3P afforded the three isomers, that is, 2-methoxy-6,7-dimethyl-3H-azepine; 2-methoxy-3,4-dimethyl-3H-azepine and 7-methoxy-5,6-dimethyl-4H-azepine. Reaction of 3,5-dimethylnitrobenzene gave the sole product of 2-methoxy-4,6-dimethyl-3H-azepine in 42%. In contrast, reaction of 2,6-dimethylnitrobenzene didn’t give any product because the steric effect of methyl groups attached on C2 and C6. Structure elucidation of all novel products have confirmed by HETCOR.  Natural B, Journal of Health and Environmental Sciences 2015-07-14 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/273 10.21776/ub.natural-b.2015.003.01.3 Natural B, Journal of Health and Environmental Sciences; Vol 3, No 1 (2015); 017-023 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/273/230 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/273/119

oai:natural-b.ub.ac.id:article/126 2019-07-29T03:53:06Z natural-b:ART

Study of Adsorption and Desorption on Gold Metals by Biomass Saccharomyces cerevisiae. Thermodynamic Review Masruroh, Masruroh Nuriyah, Lailatin Iswarin, Siti Jazimah Rahmawati, Eka adsorption, desorption, Saccharomyces cerevisiae, gold ion, thermodinamycs A Study on biosorption of gold solution (Au) by Saccharomyces cerevisiae has been caried out. These studies included determination of optimum pH, optimum Au solution concentration,  isotherm and biosorption capacity based on termodinamycs theory, and mechanims of interaction between Au ion and Saccharomyces cerevisiae biosorben. Mechanisms of interaction were known with Au ion on Saccharomyces cerevisiae biosorben using aquadest and 1 M HCl. The result showed that the optimum adsorption process of Au solution by Saccharomyces cerevisiae biosorben took place on pH 5, adsorbat concetration of 100 mg/L was 2.2321 mg/g of yeast. The adsorption isoterm followed the Langmuir adsorption with regresion value of 0.8550 (R2= 0.8550), that indicates that the chemisorption process occurred on the first monolayer on the adsorbent surface. From the thermodynamics theory gives Gibbs free energy of the process a value of ΔG = -0.09195 kJ/mol and showing spontaneous physisorption process. The number of Au ion desorption by using HCL was 73.98%, whereas by using aquades it was 35.42%. It indicated that the main interaction between Saccharomyces cerevisiae biosorben and Au ion was chemisorption. Natural B, Journal of Health and Environmental Sciences 2012-01-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://natural-b.ub.ac.id/index.php/natural-b/article/view/126 10.21776/ub.natural-b.2011.001.02.11 Natural B, Journal of Health and Environmental Sciences; Vol 1, No 2 (2011); 168-176 2301-4202 2088-4613 eng https://natural-b.ub.ac.id/index.php/natural-b/article/view/126/123 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/126/30 https://natural-b.ub.ac.id/index.php/natural-b/article/downloadSuppFile/126/31 a52ddd876608e4918c4f667744b192a2