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Articles 9 Documents

Search results for , issue "Vol 3, No 3 (2016)" : 9 Documents clear

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.

The Effect of Taurine on Superoxide Dismutase Enzyme Activity, Malondialdehyde And Histology In Liver Mice (Mus Musculus) Male-Induced Herbicide Glyphosate Elfa Verda Puspita; Gregorius Nugroho Susanto; Sumardi Sumardi; Endang Linirin Widiastuti
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Glyphosate herbicide widely used by farmers in Indonesia. As a result of exposure to herbicides, the production of free radicals or ROS exceeds the body's defense system called oxidative stress. Therefore, the activity of antioxidant enzymes in the body decline and thus can cause tissue damage and certain organ dysfunction. ROS can be suppressed by administration of antioxidants. One source of the antioxidant is taurine. Taurine has a protective effect against oxidation and free radical capture in a variety of cells and tissues against toxic oxidant component. This study aims to determine the effect of taurine in the liver of mice induced herbicide glyphosate on the activity of the enzyme superoxide dismutase (SOD), malondialdehida (MDA), changes in morphology and structure of liver histology. The research used completely randomized design (CRD). Mice were divided into three treatment groups such as, control group (K0), a group of glyphosate (K1) at a dose of 25 mg /kgBW/day orally for 25 days, and a group of taurine+glyphosate (K2) at a dose of taurine 7800 mg/kgBW/day + glyphosate dose 25 mg/kgBW/day orally for 25 days. Each treatment consisted of 8 mice as replication. Results of analysis with one ways ANOVA (P<0.05) followed by the Tukey test showed taurine dose of 7800 mg/kgBW/day can reduce liver cells of male mice that were treated by the herbicide glyphosate but it not be able to increase the levels of SOD and to decrease MDA levels.

Activity Test Ni/ZrO2-SiO2 Catalyst for Hydrodeoxygenation Reactions Mixtures the Furfurylidene Acetone Compound (FAc) and Difurfurylidene Acetone (F2Ac) Dita Prihartini; Siti Mariyah Ulfa; Elvina Dhiaul Iftitah
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

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.

Preparation of Chitosan-Fe3O4 Nanoparticles by Ex-Situ Co-Precipitation Using Tripolyphosphate / Sulfate as Crosslinker and Characterization Using XRD Ika Oktavia Wulandari; Akhmad Sabarudin; Djoko Herry Santjojo
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Magnetic nanoparticles of Fe3O4 was synthesized in this research by using ex-situ copresipitation method followed by surface modification with crosslinked chitosan along with trypolyphospate (TPP) and sulfate crosslinking agents. The Fe3O4 materials were formed from FeCl2.H2O and FeCl3.6H2O with 1:2 ratio under alkaline condition. Surface modification processes were conducted by mixing chitosan solution with purified Fe3O4 yielding a ferrogel solution as a product. Here, the crosslinker agents, TPP and sulfate, were added to the mixture to make a crosslinking compounds. In these processes, the chitosan-Fe3O4 crystallite size were affected by composition ratio and crosslinking time which will be proven by using x-ray diffraction (XRD) and modified Debye-Scherrer methods. The results showed that, on highest ratios between chitosan and Fe3O4 as well as TPP/sulfate crosslinker, gave the smallest size of crystallite of chitosan-Fe3O4. Furthermore, the more time of crosslinking process caused crystallite size of chitosan-Fe3O4 became much smaller.

Estimated Effective Dose Out of Fields in LINAC Radiotherapy Variant iX in Cervical Cancer Kadek Listuayu; Johan Noor; Bunawas Bunawas
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

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.

Preparation of Chitosan-Fe3O4 Nanoparticles by In-situ Co-Precipitation Using Tripolyphosphate / Citrate as Crosslinker and Characterization Using XRD Vita Tria Mardila; Akhmad Sabarudin; Djoko Herry Santjojo
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

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

Dosimeter Response Personal Eye Lens Using TLD-900 (CaSO4: Dy) In Radiation Field Beta And Photon Ni Kadek Nova Anggarani; Johan A.E. Noor; Bunawas Bunawas
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

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 %.

Accuracy Evaluation Activities Tc-99m in Single Organ and All Organ using Gamma Camera Mediso AnyScan Dual Head S and Anthropomorphic Phantom Diah Shanti Utaminingtyas; Johan A. E. Noor; Nur Rahmah Hidayati
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

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.

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