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JURNAL KIMIA SAINS DAN APLIKASI

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Published by Universitas Diponegoro

ISSN : 14108917 EISSN : 25979914 DOI : -

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

urnal Kimia Sains dan Aplikasi (p-ISSN: 1410-8917) and e-ISSN: 2597-9914) is published by Department of Chemistry, Diponegoro University. This journal is published four times per year and publishes research, review and short communication in field of Chemistry.

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Articles 10 Documents

Search results for , issue "Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018" : 10 Documents clear

Bioelectricity of Various Carbon Sources on Series Circuit from Microbial Fuel Cell System using Lactobacillus plantarum Mufid Ainun; Linda Suyati
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Study on bioelectrisity various carbon sources on the circuit series Microbial Fuel Cell using Lactobacillus plantarum has been conducted. This study aims to determine the electrical energy generated by various types of substrates in MFC and determe the effect of a series circuit of the electrical energy produced using Lactobacillus plantarum. The research stage consisted of preparation stages MFC components, electrical power measurements on variations in the type of substrate, and the measurement of electrical power in series circuit variation. Electrical power measurements were performed on a variety of substrate types by comparing the electrical power generated by the fructose, lactose and starch substrates while the electric power measurements with series variations are used in single series, series 2 and series 3. The results of the maximum electrical power measurement on the variation of fructose, lactose and starch substrate in MFC system using Lactobacillus plantarum were obtained respectively 10,26 mW; 63 mW and 27.47 mW. The maximum electric power generated in the MFC system uses Lactobacillus plantarum in a single circuit, series 2, series 3 series with lactose substrate obtained respectively of 63 mW, 164.74 mW and 290.51 mW. The measurement of electrical power showed that the lactose substrate produces a greater power than the other substrates. Series circuit capable of increasing electrical power in MFC system.

Natural Zeolite Modification using Dithizone and Its Application as Adsorbent of Cu(II) Agnidian Setyorini; Suhartana Suhartana; Pardoyo Pardoyo
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Activation of zeolites with dithizone by reflux method was carried out at 50°C for 6 hours and the results were analyzed using FTIR and GSA. Furthermore, the modified zeolite dithizone was used to adsorb Cu2+ metal ions on variations of adsorption time of 5, 10, 15, 30 and 60 min, variation of adsorption pH 2, 3, 4, 5 and 6 as well as variations in concentrations of 250, 500, 1000, 1500 and 2000 ppm. The results showed that there was a vibrational shift and a new peak emerged on the FTIR zeolite activation spectrum and modified zeolite indicating that the dithizone was present in the zeolite. GSA analysis results show that the surface area of activated zeolite is greater than natural zeolite ie 4,205 m2/g and 5,459 m2/g respectively, whereas dithizone-zeolite had a much smaller surface area of 0.925 m2/g. The selectivity of adsorption of activated zeolite to Cu(II) was greater than of dithizone-zeolite. The optimum adsorption contact time was 10 min for dithizone-zeolite and 30 min for activated zeolite. The optimum adsorption pH was at pH 5 for both adsorbents, as well as the optimum adsorption concentration at 250 ppm for both adsorbents.

Zeolite and Charcoal as Potential Adsorbents in Tubs of Oxydation Ditch I and Oxydation Ditch II at Water Treatment and Composting Plant (WTCP) PT. Djarum Kudus Rissa Kharismawati; Redi Joko Prasetyo; Yayuk Astuti
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

This study aims to determine the mass of zeolite and charcoal required as lime nutrient adsorbent (Ca(OH)2) in reducing pH, TSS, COD, and SV values in tubs of oxidation of ditches I and II in Water Treatment and Composting Plant (WTCP) PT. Djarum Kudus with the principle of adsorption. The methods used were jar test and spectrophotometry. The adsorbents used were chalk (Ca(OH)2), zeolite, and charcoal added to the tub samples of oxydation ditch I and oxidation ditch II by variation of mass for every adsorbent, that were 2 gram, 4 gram and 6 gram. The results showed that zeolite and charcoal were more effective than charchoal in lowering pH, COD, TSS and SV values in tubs of oxidation ditches I and II on the addition of 6 gram in 500 ml of sample.

Effect of Acid on Natural Zeolite Dealumination on Indigo Carmine Adsorption Capability Nanik Sulistyowati; Sriyanti Sriyanti; Adi Darmawan
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Modifying natural zeolite with dealumination using H2SO4 and HCl, and its application to adsorb indigo carmine has been performed. Dealumination was carried out by reacting a natural zeolite with a mixture of KMnO4-H2SO4 and a mixture of KMnO4-HCl then refluxed for 5 hours followed by washing with demineralized water until a neutral pH was obtained and dried for 12 hours at 80°C. Dealuminated zeolites were then characterized by XRD, FTIR and Si/Al ratio measurements. Dealuminated zeolite was then used to adsorb indigo carmine in a batch-shaker system for 30 min with concentration variation XRD diffraction shows that natural zeolite and dealuminated zeolite contain modernit minerals. Dealumination increased the Si/Al ratio from 0.935 to 2.075 and 7.912 which meant that dealumination was successful. The indigo carmine adsorption result showed that zeolite adsorption capacity II> zeolite I> natural zeolite. FTIR data showed that there was no change of zeolite structure before and after adsorption

Activity Test of Suji Leaf Extract (Dracaena angustifolia Roxb.) on in vitro cholesterol lowering Devina Ingrid Anggraini; Lily Fathrah Nabillah
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Cholesterol is a natural substance with physical characteristic similar to fat but has a steroidal group. The body requires cholesterol in normal amount; however, it will harm the body in excess amount. High cholesterol levels in the blood are dangerous because of the precipitation of cholesterol and other fatty substances resulting in atherosclerosis. Suji leaf (Dracaena angustifolia Roxb.) used as a natural dye has a high flavonoid content that is inferred to have cholesterol-lowering activity. This study aims to test the in vitro activity of suji leaf (Dracaena angustifolia Roxb.) extract in decreasing cholesterol level with various concentrations and to find the effective concentration (EC50). The method of extraction used was remaceration method with 70% ethanol solvent. Analysis of cholesterol-lowering activity was done by Lieberman-Burchard method by making variation of ethanol extract 400 ppm, 500 ppm, 600 ppm, 700 ppm, and 800 ppm. The results showed the percentage of cholesterol-lowering activity by 33.62%, 36.15%, 46.61%, 56.39% and 64.05% respectively. Value of EC50 activity of suji leaf extract is 632.50 ppm.

Chitosan succinate/PVA-PEG Membrane: Preparation, Characterization and Permeation Ability Test on Creatinine Retno Ariadi Lusiana; Vivi Dia Ahmad Sangkota; Sri Juari Santosa
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Evaluation character of chitosan membrane-succinate / poly vinyl alcohol-poly ethylene glycol (PVA-PEG) were prepared in acetic acid solvent through a phase inversion method has been performed. The study began with the preparation of crosslinked chitosan compounds with succinic acid, followed by preparation into membrane by combining PVA-PEG. Character analysis of the resulting material using FTIR, EDX, TGA, water absorption test, tensile strength, membrane hydrophilicity. The ability of membrane permeation was tested against creatinine. The results showed that the succinate had reacted with chitosan. Chitosan modification through cross link and polymer alloys increases tensile strength and membrane strain of 1.7-2.5 x of pure chitosan membrane. In addition, the modified membrane also has higher water absorption and hydrophilicity values than the unmodified membrane, and this implies the ability of membrane-induced creatinine permeation. Permeable permeation values were 13.8% in chitosan, 24.84% on chitosan-succinate and 25% in chitosan-succinate / PVA-PEG. Chitosan-succinate membranes have the ability to use more than 4x repeated use.

Decolorization of Remazol Black B Solution by PbO2 Modified Fenton Method in a Scaled Up Reactor Muhamad Abduh Hasibuan; Didik Setiyo Widodo; Retno Ariadi Lusiana
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Study on decolourization of remazol black B (RBB) solution has been performed in a scale up reactor. As an artificial waste, the dye sample that contains azo groups is difficult to decompose under ordinary environmental conditions so it requires further treatment before discharging to open aquatic system. Many efforts have been reported and further developed toward other azo dyes. One of an outstanding approach is Fenton method. This study modified the method with PbO2 rather than Fe2+. In this modification, the dyestuff was degraded by radical •OH resulting from reaction between H2O2 and Pb2+ ion generated from PbO2. In Preliminary works, decolourization was performed and optimized in lab-scaled. Analysis were conducted and the best condition was applied to decolorize the sample in a scale-up size. Characteristics of the reactor was also determined. Results showed that at optimum condition, 100 mL of 50 ppm remazol black B was decolorized up to 98.82 % within 15 minutes. On scale up to 1 L-sized reactor, within the time highest percentages of remazol black B decolourization was reached 82.02 % by addition of 10 % H2O2 and COD decrease to 98.96 %. In the 1 L reactor, RBB sample with concentration of 50 ppm, PbO2 1 gram and H2O2 10 % obey the proposed decolourization equation of D = -0,0011x2 + 0.5705x – 0.6788 with x = volume peroxide (in mL), D = percent of decolourization.

Interaction Studies Between Cyclic Peptide ADT-C3 (Ac-CADTPC-NH2) with E-Cadherin Protein using the Molecular Docking Method Simulated on 120ns Parsaoran Siahaan; Vivitri Dewi Prasasty; Atiatul Manna; Dwi Hudiyanti
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

The treatment of diseases that attack the brain is very difficult, because the delivery of drug molecules to the brain is often hindered by the blood-brain barrier (BBB). So that the drug delivery is not right on the target cell. Thus, was developed a method in modulation of intercellular junctions using ADTC3 cadherin peptide, Where the cadherin peptide is derived from the cadherin sequence itself. The method used in this research is molecular dynamics (DM) and molecular docking. In this study have been evaluated some peptide conformation in modulating intercellular junction. The results show that cyclic peptide ADT-C3 (Ac-CADTPC-NH2) was conducted DM for 120 ns (120000 ps), which has considerable activity in modulating intercellular junctions with binding energies of -33.10 kJ.mol-1 and Ki of 1.58 μM at the 79187 ps conformation. The binding site on residues Asp1, Trp2, Ile4, Lys25, Ser26, Asn27, Met92 in the adhesion arm-acceptor pocket region.

Isolation and Testing of Bacteria from Steroid Compounds obtained from Anting-anting Leaf (Acalypha indica L.) Ditya Vega Fauzia; Dewi Kusrini; Enny Fachriyah
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Isolation of steroid compounds from the leaves of the earrings (Acalypha indica L.) and the antibacterial test has been performed. This study aims to obtain information about secondary metabolite compound leaves of Anting-anting, obtaining and identifying steroid isolates from the leaves of Anting-anting and knowing the antibacterial activity of the positive fraction of steroid compounds. The research stages include sample preparation, phytochemical test, isolation, separation, purification of steroid compounds, identification of steroid isolates using LC-MS/MS, and antibacterial test by paper disc method. The results of phytochemical screening show that the leaves of the earrings contain alkaloid compounds, flavonoids, steroids, saponins, tannins, and quinones. From the results of steroid isolation, we found steroid isolates weighing 0.0065 grams (0.0058%). Identification of steroid isolates using LC-MS/MS at a retention time of 7.49 min with [M+H]+ 399 m/z indicated the presence of a brassicasterol compound. The results of antibacterial test of fraction A from chloroform extract containing steroid compound showed antibacterial activity against Staphylococcus aureus bacteria and Escherichia coli bacteria.

Synthesis of Nano Chitosan as Carrier Material of Cinnamon’s Active Component Ngadiwiyana Ngadiwiyana; Enny Fachriyah; Purbowatiningrum Ria Sarjono; Nor Basid Adiwibawa Prasetya; Ismiyarto Ismiyarto; Agus Subagio
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Development and innovation to improve the efficacy of active ingredients of a plant can be done by using nanoparticle encapsulation of chitosan, which has dual function of protecting natural extracts degradation and delivering natural extracts to the target site. Chitosan is a natural polymer that is nontoxic, mucoadhesive, biodegradable, and biocompatible. This polymer also has a low level of immunogenicity and can be prepared into nanoparticles in mild conditions that make it suitable for natural extracts delivery systems. This paper reported synthesis of chitosan nanoparticles for cinnamon’s natural extract delivery. Chitosan synthesis was carried out by chitin deacetylation isolated from shrimp shells. Chitosan characterization was done by measuring deacetylation degree by FTIR. Chitosan nanoparticles were prepared by ionic gelation method using tripolyphosphate as crosslinker. Morphology and particle size of nano chitosan were characterized using a scanning electron microscope (SEM) and a transmission electron microscope (TEM). The result found that the yield of deproteinated chitin was 62.60%. Further process of demineralization resulted a yield of 52.60%, then depigmentation with a yield of 75.56%, and deacetylation with a yield of 79.02%. FTIR analysis showed that deacetylation degree of chitin into chitosan was found of 87.78%. Characterization by SEM found that nano chitosan has a particle size of 87 nm. While TEM images showed that the nano chitosan has a uniform shape and a lower physical aggregation.

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Adi Darmawan

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Home Page

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Contact Name Adi Darmawan

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Contact Name
Adi Darmawan

Contact Email
adidarmawan@live.undip.ac.id

Phone
-

Journal Mail Official
jksa@live.undip.ac.id

Editorial Address
-

Location
Kota semarang,

Jawa tengah

INDONESIA