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Articles 200 Documents

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Effect of Sintering Temperature on Percentage of Tetragonal And Rhombohedral On Comparison of Zr / Ti (60/40) Tamam Abimanyu; Rachmat Triandi; Masruroh Masruroh
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

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.

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; Adi Susilo
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

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.

Ethnobotany and Food Plant Community Sambori District Bima Regency West Nusa Tenggara Indonesia Zulharman Zulharman; Bagyo Yanuwiadi; Jati Batoro
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

The purpose of the study was to determine the local knowledge that is applied by the local people in Sambori village in the utilization of medicinal plants and food plants. The research was conducted in the Sambori village, District of Lambitu, Bima, West Nusa Tenggara, in January to February 2015. The method was employed through ethnographic description through interviews and literary study. The method to select the informants was using the snowball technique. The main characteristics of respondent are the public figure and Sambori traditional people of 30 people. Data analysis was analyzed of ethnographic descriptive analysis. The results showed that the number of plants used for the mediclinal purposes was 18 species of plants, which are dominated by species of Zingiberaceae family, with specific benefits for three types of fever treatment, 9 species for smallpox, and 9 species for kidney stones, and 9 species for slimming and maag. The utilization of plants for daily food consists of 8 species namely Oryza sativa, Oryza sp, Zea mays, Vigna Radiata, Manihot utilisima, Glycine max, Arachis hypogaea L dan Ipomoea batatas L. The material of food plants consists of three families, 38% was dominated by Poaceae family food plants, 37% of Fabaceae family and 25% of Convolvulaceae family. The food plants that utilized for vegetables material are 9 types species, namely Vigna sinensis, Momordica charantia, Sechium edule, Cucumis sativus, Phaseolus vulgaris, Solanum lycopersicum, Schleichera oleosa, Solanum melongena dan Capsicum frutescens L. The parts of the food plants as vegetables are leaves and fruits.

Effect of Thickness on Thin Layer Resistance Value of Zinc Sulfophthalosianin (ZnPcSn) As Prototype of Ozone Detector Novitasari, Anggriana; Masruroh, Masruroh; Tjahjanto, Rachmat Triandi
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

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 Â that the ZnPcSn thin film has promising potential as ozone detector.Â

Correlation of Well and Seismic Log Data for Spreading Litology and Porosity Reservoir Hydrocarbon Formation Gumai Basin South Sumatera Timur Dikman; Adi Susilo; Said Sabbeq
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Integration of seismic data and well log is carried on the field X to identify the distribution of lithology and porosity in the reservoir target zone in this field. With the purpose to get a good interpretation of the subsurface in the process of hydrocarbon exploration. The integration of data is done by using acoustic impedance inversion analysis. Two types of acoustic impedance inversion method is applied to the well log data and seismic, i.e maximum likelihood sparse spike and a model-based inversion. Both of them have a high correlation coefficient and a low error rate. Sparse spike inversion result was selected to use in the next process as it has an acoustic impedance value that is more similar to the well log acoustic impedance value. Acoustic impedance models correlated with the lithological profiles of well log is used to predict the spread of reservoir lithology. Sparse spike inversion results are then used as input to the module EMERGE on Hampson Russell Suite 9 software, to predict the distribution of porosity from seismic volume. The volume of porosity is determined from regression function crossplot between acoustic impedance inversion results with fixed porosity well logs.

Effect of Tripolyphosphate and Ethylene Glycol Diglicidyl Ether on Chitosan Beads for Cr (VI) Adsorption Merpiseldin Nitsae; Armeida D. R. Madjid; Lukman Hakim; Akhmad Sabarudin
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

The research about effect of tripolyphosphate (TPP) and ethylene glycol diglycidyl ether (EGDE) in preparation chitosan beads for Cr(VI) adsorption has been studied. The aim of this research was produced chitosan beads that have the ability to adsorb Cr(VI). Therefore, effect of TPP and EGDE has been studied in the research. Concentrations of TPP has varied 1%, 5%, 10%, and 15% while concentration of EGDE are 1%; 2.5%; 5%; and 7.5%. For the process adsorption chitosan beads with Cr(VI) ions used analysis with Batch method. The result shows optimum condition of chitosan beads was prepared by 5% chitosan: 5% TPP: 5% EGDE at 3 hours immersion. The adsorption capacity was 8.892 mg g-1. Which beads size was different i.e. 509-686 µm.

Identification of the Addition Effect from Duwet Fruit Extract (Syzygium cumini) on Cigarette Filter Against the Magnetic Character of Cigarette Smoke Rohul Hayati; Djoko Harry Santjojo; Johan A. E Noor
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Cigarette smoke is heterogeneous aerosol which resulted from imperfect burn of tobacco leaf that contain gas and particle component which very potential as free radical. The amount of radical content in this cigarette smoke can be reduced by bioactive compounds which functions as radical scavenger such as what is contained in the java plum (Syzygium cumini) plant and can be identified through its magnetic character. The aim of this research was to assess and analyze magnetic character from cigarette smoke before (empty cigarette smoke) and after the addition of java plum squeeze extract to the filter (cigarette smoke of java plum) by using instrument set of ESR. This research showed that with the addition of java plum squeeze extract, it could alter magnetic character of cigarette smoke becomes more paramagnetic which seen from the difference of energy level (∆E) under the influence ofan external magnetic field, Besides the changes in the form of splitting of energy in cigarette smoke Duwet marked by changes in the value of energy groundstate more significant to the external magnetic field that is interpreted that the smoke Duwet have ferromagnetic properties more than an empty cigarette smoke.

Application of 3D Resistivity Method for Distribution of Seawater Intrusion in The Tanah Mas Residential North Semarang Andya Satya Purnomo Putro; Supriyadi Supriyadi; Khumaedi Khumaedi
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

The seawater intrusion into the groundwater in Tanah Mas residential North Semarang was investigated by chlorides ion levels from production wells and 3D electrical resistivity profiling. Tanah Mas residential area is a densely populated area located in the northern coastal city of Semarang. At the area, the exploitation of groundwater through production wells is quite high, that potential to produce the phenomenon of seawater intrusion. Analysis of groundwater samples from production wells was carried out as an early indication of the seawater intrusion in the study area. The profiles acquired across the study area, using a multi-electrodes acquisition system in a Wenner array configuration by electrode spacing of 10 m were used for the profiling. The results of groundwater chemical testing, there are three groundwater samples that has high levels of chloride ions. Three groundwater samples have the high levels of chloride ions that are in wells F, J and M. Apparent resistivity data of the 2D profiles over the models were collated to 3D data sets for each array studied. From 3D electrical resistivity profiling, obtained the distribution of seawater intrusion that has reached the north, east and south of Tanah Mas residential.

2D Imaging Technique Electrical Impedance Distribution on Liquid with Paired Method and Using EIDORS Software Ahmad Zarkasi; Abdurrouf Abdurrouf; Didik Rahadi Santoso
Natural B, Journal of Health and Environmental Sciences Vol 4, No 1 (2017)
Publisher : Natural B, Journal of Health and Environmental Sciences

This paper discusses the 2D imaging technique of the electrical impedance distribution in the liquid by using the principles of Electrical Impedance Tomography (EIT). A tomographic technique used in the imaging process is a adjacent or neighbor method, with input data obtained from measurements of the electrical potential at the boundary measuring object. Measurement data is reconstructed using open source software, i.e. EIDORS, which in image reconstruction using the principle of Finite Element Method (FEM). As a comparison on the results of image reconstruction by EIDORS, here used Boundary Data Simulation (BDS) were obtained from the same measurement data. Based on the results of the 2D images that have been obtained, it is evident that the techniques and imaging methods that have been used are able to show the distribution of electrical impedance value of the measuring object and have a good agreement with the results of BDS.

Geochemical Fraction Profile of Metal Cd, Pb and Zn on Sediments of Sidoarjo Mud Reclamation Area at Porong Sidoarjo Estuary Ahmad Dody Setiadi; Barlah Rumhayati; Catur Retnaningdyah
Natural B, Journal of Health and Environmental Sciences Vol 4, No 1 (2017)
Publisher : Natural B, Journal of Health and Environmental Sciences

Sediments of Porong River estuary suspected of containing a high concentration of heavy metals. the Sediment sample was collected from Porong Estuary river at two different location. The purposes of this study to determine the distribution concentration of metals geochemical fraction (Cd, Pb and Zn) at sediment Porong River estuary and correlation Against Physico-chemical properties of sediments. Analysis of sediment includes determining the concentration of Cd, Pb and Zn and determining of physicochemical properties of sediments such as pH, salinity, redox potential, cation exchange capacity, organic materials and sediment particles size. Extraction Method performed by BCR (Community Bureau of Reference) three steps sequential extraction, where a geochemical fraction of metals divided to 4 fractions, such acid soluble, reducible, oxidized and residual fractions. Research showed Zn has the highest concentration of each fraction and followed by Pb and Cd. Concentration of Zn in Fraction 1-4 ranged from 31,909 – 84,966 mg/Kg, Pb concentrations range 3,354 – 18,956 mg/Kg, whereas Cd concentrations range between 0,221 – 0,611 mg/Kg. The order of metals geochemical fraction concentration at Fraction 1, 2, 3 and 4 is Zn>Pb>Cd. There is some correlation between metals concentration against physicochemical properties of sediment. Where the physicochemical properties of sediment influence heavy metal content and concentration in the sediment of Porong River Sidoarjo.

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