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Articles 15 Documents

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Search results for , issue "Vol 3, No 2 (2015)" : 15 Documents clear

Study of the Effect of Inter-Electrode Distance on Thin Phytocyanine Zinc Thin Layer Resistance (ZnPc) with Exposure to Ozone Nur Robi'ah A. M.; Anggriana Novitasari; 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 effect of the distance between electrodes, in interdigitated pattern of Printed Circuit Board (PCB), on the resistance of zinc phthalocyanine (ZnPc) thin film have been done by measuring film resistance before and after ozone exposure. Interdigitated pattern of PCB was formed from copper layer by using FeCl3 10% as an etchant, with two various distance between electrodes i.e 0,3 mm and 0,7 mm. The thin film of ZnPc was deposited on the interdigitated electrode of PCB by using vacuum evaporation method, then, annealed at temperature 100ºC for 5h. The resistance of ZnPc thin film was measured before and after ozone exposure for 1h. The results show that the resistance of ZnPc thin film that deposited on PCB with the distance between electrodes 0,3 mm is 50% lower than in 0,7 mm, and, show the higher of the film conductivity. The higher of the film conductivity is caused by the larger of copper electrode surface that have conductive properties, on the PCB with smaller of the distance between electrodes.

Effect of Sterculia quadrifide Extract R.Br. Against Free Radical In Liver Organs Oreochromis niloticus Due to Heavy Metal Pollution Janes Bastian Selly; Abdurrouf Abdurrouf; Unggul P. Juswono
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Sterculia quadrifida R.Br. is known with the name of Faloak. It is a plant whose bark has been containing several natural antioxidant compounds. Research shows that antioxidant compounds of Faloak extract can reduce free radicals content in liver organ of nila fish (Oreochromis niloticus) that is contamined by metals such as Pb, Cd and Hg. The concentration of metals is directly proportional with free radicals content of the organ, but free radicals content is inversely proportional with the concentration of faloak extract. Result of research indicates that faloak concentration of 16,00mg/mL is the most effective concentration in reducing free radicals content in liver organ of nila fish. Type and content of free radicals in the organ are identified with Electron Spin Resonance (ESR) test.

Ni / MgO Bifunctional Catalyst for Condensation and Furfural Hydrogenation Reactions in One Stage Produce Alkana C8-C13 Derived Compounds Siti Mariyah Ulfa; Indah Nur Pramesti
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Ni/MgO catalyst has been designed as bifunctional catalyst for condensation reaction of furfural and acetone followed by hydrogenation reaction to produce C8-C13 alkane derivatives in one step reaction. Ni/MgO catalyst was prepared by wet impregnation methods using Ni(NO3)2.6H2O and MgO as supporting material. The charcterization by X-ray diffraction (XRD) showed the characteristic of Ni on 2q = 44,27o; 51,59o and 75,89o. Isoterm adsorpsi using N2 gas gave the decreasing surface area of MgO and forming microporous structure. The activity test of the catalyst was carried out using furfural and acetone (1:1) in autoclave bath system, heated at 100-180oC for 7-8 hours in the presence of water. Ni/MgO catalyst showed the good activity when hydrogenation reaction performed at 150oC lead to the conversion of alkane derivatives in 95.69%. Characterization of the product by GC-MS showed the formation of 4-(2-furanyl)-2-butanone; 1,5-di(2-furanyl)-3-pentanone and 1,5-di(2-furanyl)-3-(1-pentenone) from reduction of C=C alkene of furfurylidene acetone.

Effect of Gamma Radiation and Temulawak Extract (Curcuma xanthorrhiza) on HAART Levels of Mice Mice (Mus musculus) Septiana K. Sari; Chomsin S. Widodo; Unggul P. Juswono
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

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.

Polycyrene-based Microbore Monolith Column Preparation for Separation of Alkylbenzene Using High Performance Liquid Chromatography Aprilia Nur Tasfiyati; Wigang Solandjari; Elvina Dhiatul Iftitah; Akhmad Sabarudin
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

In this study, polystyrene-based monolith was developed as reversed phase column in high performance liquid chromatography (HPLC) for separation of small molecule sample (alkylbenzene). Polystyrene-based monolithic column was prepared in microbore silicosteel column (100 x 1.02 mm i.d.) by in-situ polymerization reaction using styrene as monomer, divinylbenzene as crosslinker, porogenic solvents, with the presence of radical initiator 2,2’-azobis(isobutyronitrile). The morphology of the monolithic column was studied by SEM. The properties of the monolithic column, such as permeability, mechanical stability, binding capacity and pore size distribution, were characterized in detail. From the characterization results of 9 monolith variation, monolith PS-DVB with %T 30, %C 50, using toluene:1-decanol (3:7 v/v) as porogenic solvent was found to be the ideal composition and gave the best separation of alkylbenzene. It has theoretical plate value (N) of 17260/m column, also has relatively equal proportion of flow-through pore and mesopores (47% and 44% respectively). The performance of monolithic column was also compared with commercially available monolithic column Proswift RP-4H. PS-DVB monolith prepared in this study shown its superiority over commercial one.

Adsorption of Linear Alkylbenzene Sulfonate (LAS) on Eggshell Powder I Made Wisnu Adhi Putra; I Gede Widhiantara
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Linear Alkylbenzene Sulfonate (LAS) is the main constituent of the detergent active ingredients. Some negative effects may be appear if this compound enters the aquatic environment with high concentration. In this study, the adsorption of LAS on chicken eggshell powder was studied in different contact time, pH, and initial LAS concentration. The adsorption isotherm pattern was also investigated in two different models i.e. Langmuir and Freundlich. Eggshell powder was characterized using FTIR, XRD, and Surface Area Analyzer prior to adsorption test. The maximum amount of LAS adsorbed on eggshell powder was achieved at contact time of 45 minutes, pH of 7, and initial LAS concentration of 75 mg/L. LAS adsorption on eggshell powder was found to follow the Langmuir isotherm adsorption with the adsorption capacity (b) of 1.6218 mol/g, adsorption constant (K) of 6.1660 x 104 L/mol, and the adsorption energy (ΔG° ads) of 27.78 kJ/mol.

Analysis of Effect of Sound Frequency Against System Open Close Stomata of Rice Plant of Logawa Variety Kuni Nadliroh; Chomsin S. Widodo; Didik R. Santoso
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

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.

Physico-Chemical Aquatic Sediment Study and Its Effect on Cl-, CO32- / HCO3- and SO42- Availability at Brantas Water Basin Source Brantas Winioliski L.O Rohi Bire; Barlah Rumhayati; Atikah Atikah
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

The research about study of physico-chemical properties of aquatic sediment has been conducted for determining the availability of Cl-, CO32-/HCO3- and SO42- in Sumber Brantas stream. Sediment samples were collected from Sumber Brantas stream, Village of Sumber Brantas, Batu City in July-September 2014 on five different locations. Determination of pH using a pH meter, the determination of the composition of the sediment with the pipette method, determination of Cl- by argentometry, SO42- by turbidimetry and CO32-/ HCO3- by acid-base titration. The result showed that Sumber Brantas stream sediment relatively acidic and dominated by sand fraction. Anion distribution in Sumber Brantas stream sediment was HCO3- > SO42- > Cl- > CO32-. The distribution was influenced by Ksp value of the anion.

Land Suitability for Sarimukti Area Surrounding Neighborhood Development Direction Nandian Mareta; Andre Al Kautsar
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

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.

Study of Effect of Concentration of MnCl2 Solution on Intensity of VCD chip Spectrometer Imagery Lailatin Nuriyah; S. J. Iswarin; Gancang Saroja
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Spectroscopy is study of interaction between radiation of wave and matter. In its application, spectroscopy has been used to observe and study the characteristics of a matter through its resulted spectrums. In this research, spectrometer was built with VCD chip and two kind of lamp sources, incandescent and fluorescent lamp. The MnCl2 solutions with concentration 0, 1, 2, and 3 M were used as sample. Image-J software was used to analysis the resulted spectrums. The results showed an interaction between rays and the solution with indication the image intensity decreased.

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