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Molekul: Jurnal Ilmiah Kimia
Published by Universitas Jenderal Soedirman
ISSN : 19079761     EISSN : 25030310     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
MOLEKUL is a peer-reviewed journal of chemistry published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Jenderal Soedirman University, Indonesia. Publishing frequency 2 issues per year, on May and November. This Journal encompasses all branches of chemistry and its sub-disciplines including Pharmaceutical, Biological activities of Synthetic Drugs, Environmental Chemistry, Biochemistry, Polymer Chemistry, Petroleum Chemistry, and Agricultural Chemistry.
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol 2, No 1 (2007)" : 7 Documents clear
PENGARUH pH LARUTAN DAN UKURAN PARTIKEL ABU SEKAM PADI TERHADAP PENURUNAN KADAR CONGO RED Tien Setyaningtyas; Uyi Sulaeman
Molekul Vol 2, No 1 (2007)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.887 KB) | DOI: 10.20884/1.jm.2007.2.1.26

Abstract

Rice husk used as a raw material to produce the rice husk ash. The purpose of this research were to determine the optimum contact time and maximum pH of congo red adsorption by rice husk ash, to find out the influence of particle size to adsorption The rice husk was washed, then soaked in HCl 3.84 M to remove mineral impurities, and it was dried and heated for four hours at the temperature 6000 C. The yield gained from this research is 23.44%. Optimum contact time started at after five minutes and maximum pH is six for the tree mention particle sizes 50, 100 and 140 mesh. Particle size didn’t give any significant effect to adsorption process with percent decreasing of congo red is 84.97 %, 90.39 %, 89.32 % respectively.
FOTOREDUKSI Cd (II) MENGGUNAKAN KATALIS TiO2 DENGAN SENSITIZER KLOROFIL YANG DIAKTIVASI SINAR MATAHARI Uyi Sulaeman; Kapti Riyani; Anung Riapanitra; Dyah Indriastuti
Molekul Vol 2, No 1 (2007)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (133.862 KB) | DOI: 10.20884/1.jm.2007.2.1.28

Abstract

The photoreduction of Cd (II) has been investigated using thin layer catalyst of titanium dioxide and chlorophyll as sensitizer. Thin layer catalyst could be prepared by sol gel method deposited on glass slide. The treatments of experimental are: TiO2 catalyst using chlorophyll without sunlight illumination, TiO2 catalyst using chlorophyll with sunlight illumination and TiO2 catalyst with sunlight illumination. The concentration of Cd (II) in the solution is monitored every 30 minutes until 150 minutes illuminations by atomic absorption spectroscopy. The results showed that concentration of Cd (II) decreased reached to 45,53 % in TiO2 catalyst using chlorophyll with sunlight illumination at pH 5 after 150 minutes illumination and it decreased reached to 34.07% at pH 7 after 120 minutes illumination. Addition the chlorophyll to TiO2 catalyst increased photoreduction activities.
PEMBUATAN SELULOSA ASETAT DARI PULP KENAF (Hibiscus cannabinus) Senny Widyaningsih; Cynthia Linaya Radiman
Molekul Vol 2, No 1 (2007)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (96.378 KB) | DOI: 10.20884/1.jm.2007.2.1.181

Abstract

Cellulose acetate (CA) is one of polymer which is usually used in industry. Kenaf (Hibiscus cannabinus) pulp is one of non wood cellulose sources which can be used for producing CA. CA was produced in three step i.e. initial, acetylation, and hydrolysis. The characterization of CA kenaf had been conducted with analyzing function groups and determining relative molecule mass, acetyl content, and structure of CA. The result of infrared spectroscopy analyze showed that specific peak of acetyl group at 1237.4 cm-1 with acetyl content 40.40% and the relative molecule mass of CA was 1.15.104 with amorf structure.
REAKSI TRANSESTERIFIKASI MINYAK KACANG TANAH (Arahis hypogea. L) DAN METANOL DENGAN KATALIS KOH Purwati Purwati; Hartiwi Diastuti
Molekul Vol 2, No 1 (2007)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (88.373 KB) | DOI: 10.20884/1.jm.2007.2.1.30

Abstract

Oil and fat as part of lipid are taking an important role in food industry. There are soluble vitamins, like A, D, E and K, in oil and fat. Oil, that is a source of essential acid, is a high energy source. Oil and fat take a role to improve the shape and to give a taste. This experiment have been conducted to investigate the quantity of methyl ester that is produced from transesterification reactions of peanut seed oil with methanol using KOH as a catalyst and to analyze a kind of methyl ester that is produced using GCMS.We got 68% v/v product of transesterification and we knew for kinds of methyl ester those were produced from GCMS. They are methyl palmitic, methyl linoleic, methyl stearic, dan methyl 12-hydroxil-9-octadecaenoic.
PREPARASI DAN KARAKTERISASI KOMPLEKS KITOSAN HIDROGEL-TEMBAGA(II) Risfidian Mohadi; Nurlisa Hidayati; Melany N.R
Molekul Vol 2, No 1 (2007)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (319.295 KB) | DOI: 10.20884/1.jm.2007.2.1.31

Abstract

Research about preparation and characterization complex of chitosan hydrogel–copper(II) had been done. Chitosan hydrogel was obtained from deacetylation of chitin which was isolated from crab shells. Characterization included determination of N-total, Corganic , deacetylation degree, and FTIR spectroscopy. The results of research showed that obtained chitosan had 7,9571% N-total, 2,767% Corganic, and 71,486% deacetylation degree. FTIR spectrum of chitosan showed the increasing in percentage of transmitant from C=O group and the shifting in wavenumber from 1561,5 to 1563 cm-1 indicated N-H bending. Generally, FTIR spectrum of chitosan hydrogel showed the shifting to higher wavenumbers caused by changing in bond angles of chitosan group. FTIR spectrum of chitosan hydrogel-copper(II) complex showed that absorption regions of N-H group becoming wide and the shifting in wavenumber from 1594,74 to 1542,9 cm-1 whichindicated N-H bending because of copper(II) bonding to N-group of chitosan.
UJI AKTIFITAS ANTIKANKER EKSTRAK ETANOL KULIT BATANG Bruguiera gymnorhiza TERHADAP SEL MEYLOMA Warsinah Warsinah; Puji Lestari; Trisnowati Trisnowati
Molekul Vol 2, No 1 (2007)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (338.832 KB) | DOI: 10.20884/1.jm.2007.2.1.29

Abstract

Mangrove vegetation especially tanjang (Bruguiera gymnorhiza) known as a kind of plant that used as an ingredients for traditional medicine. Bioactive compound in tanjang bark has potential medical. Although there is no previous experiment about tanjang bark, few compounds from Bruguiera genus has been experimented and has an activity as an anti-cancer and anti-tumor. The purpose of this experiment is to conduct sitotoxicity tanjang bark against Meyloma cell. Tanjang bark sample that used obtained from Tritih beach at Cilacap. Tanjang bark that has been cleaned and dried is cut and then crused until it obtain powder. The powder is been maceration with 96% ethanol and been evaporation. The extract that obtain is used in sitotoxicity test using MTT (3-(4,5-dimethylthiazoil-2-il)-2,5-diphenil tetrazolium bromide) method toward Meyloma cell after 24 hour of incubation using several concentration variation. Tanjang bark extract in ethanol has LC50 value 508.19 mg/ml. Morphology analyze and nuclear staining shows that there is apoptosis activity even in small amount. The result shows that tanjang bark extract has a potency as an anti-cancer toward Meyloma cell. 
KAJIAN FRAKSI METANOL DARI EKSTRAK METILEN DIKLORIDA KULIT KAYU BATANG PELAWAN (Tristania whitiana Griff.) SEBAGAI ANTIBAKTERI Purwantiningsih Sugita
Molekul Vol 2, No 1 (2007)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (126.093 KB) | DOI: 10.20884/1.jm.2007.2.1.24

Abstract

Antibacterial compound from methanol fraction of methylene dichloride extract of pelawan bark had been studied. Pelawan bark was extracted using ethanol 95% and CH2Cl2-water (1:1), respectively. Extract of CH2Cl2 was partitioned using hexane-methanol 90% (1:1). Afterwards, methanol fraction was analyzed by thin layer chromatography methods to find the best eluent for column chromatography. The best eluent came from mixture of acetone-chloroform-methanol (0,6:4:0,4). The fractionation yielded 16 fractions with the first (M1) and the third (M5) fractions became the one spotted fractions. M1 and M5 fractions were examined for their antibacterial activity using paper diffusion methods by determining minimum inhibitory concentration value. M1 fraction showed greater activity than M5 fraction with minimum inhibitory concentration value of 2,7857 mg/mL. The result of phytochemistry test showed that both fractions contain terpenoid.

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