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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 5, No 2 (2010)" : 7 Documents clear
UJI AKTIVITAS ANTIOKSIDAN HASIL DEGRADASI LIGNIN DARI SERBUK GERGAJI KAYU KALBA (Albizia falcataria) DENGAN METODE TBA (Thio Barbituric Acid) Undri Rastuti; Purwati Purwati
Molekul Vol 5, No 2 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.138 KB) | DOI: 10.20884/1.jm.2010.5.2.82

Abstract

Antioxidants are compounds that can delay, retard or inhibit the oxidation reaction. Lignin is a natural polymer consisting of monomeric substituted phenols. Wood lignin degradation Kalba (Albizia falcataria) yields substituted phenol. The purpose of this study was to test the antioxidant activity of compounds of lignin degradation products Kalba using TBA (Thiobarbituric Acid). Wood lignin degradation products Kalba tested antioxidant activity using the TBA method. Phase test phase of this antioxidant activity is sample preparation, determination of the maximum wavelength, determination of equilibrium time, absorbance measurements and determination of the percentage of inhibition. The wavelength maximum for BHT test solution was obtained at 530 nm. The stability of absorbance achieved after 80 minutes equilibrium time. BHT test solution and sample solution containing the degradation of lignin 0.10% (w/v) increased but not as sharp as the absorbance of control, this suggests that the degradation of wood lignin Kalba have activity as an antioxidant, which relative minimize 13,70 % compare with BHT.
OPTIMASI BIOKRAFT JAMUR Phanerochaete chrysosporium TERHADAP KOMPONEN KIMIA CAMPURAN BATANG DAN LIMBAH CABANG MANGIUM SEBAGAI BAHAN BAKU PULP Devi Silsia; Ridwan Yahya; Mucharomah Mucharomah
Molekul Vol 5, No 2 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (123.291 KB) | DOI: 10.20884/1.jm.2010.5.2.77

Abstract

Optimation biokraft of fungi P. Chrysosporium through elongated incubation time on mixed stem and branch waste mangium is a solution to solve the environmental pollution problem, low quality of pulp and limited raw material. Effect of P. Chrysosporium 10 % concentration and 45 days incubation time on pre research could not decrease lignin optimally and exstractive degradation had not occured yet. The aims of the study were to observe the effect of incubation time extension, and to determine the best incubation time of P. Chrysosporium applied at 10 % concentration based on the chemical component percentage, 45, 60 and 75 days on mixed stem and branch as raw material for pulp. Results showed that increasing incubation time decreased extractive and lignin content and increased holocelulosa and alpha celulosa content. Mixed stem and branch with 10% amount and 75 day incubation time of P. Chrysosporium gave the best results for raw material of pulp.
KAJIAN SIFAT MAGNETIK DARI PASIR BESI PANTAI LOGENDING KABUPATEN KEBUMEN Bilalodin Bilalodin
Molekul Vol 5, No 2 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (101.705 KB) | DOI: 10.20884/1.jm.2010.5.2.83

Abstract

Study on magnetic properties of iron sand on the Logending beach sand has been done. The research aims to identify the mineral content and characterization of magnetic properties on the Logending beach sand. The irond sand samples taken from the Logending beach with several lokation. Sand then dried, determined density and magnetic content is separated using a permanen magnet. The iron sand were analyzed using XRD ( X-ray difraction) and characterization of magnetic properties using the VSM (Vibrating sample magnetometer). The research shows that minerals are contained hematit (Fe2O3), with a value of susceptibility is 0.43 x10-6 m3/kg. The main magnetic mineral of iron sand from logending beach is paramagnetic.
PEMANFAATAN ARANG BATOK KELAPA DAN TANAH HUMUS BATURRADEN UNTUK MENURUNKAN KADAR LOGAM KROM (Cr) Anung Riapanitra; Roy Andreas
Molekul Vol 5, No 2 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (250.484 KB) | DOI: 10.20884/1.jm.2010.5.2.78

Abstract

Waste containing hazardous and toxic chemical compounds into the environment leads to water pollution, soil and air. These chemical compounds will endanger human life and environment. One type of compound that may pollute the environment is chromium. The metal is commonly found in industrial waste such as from exhaust and industrial wastewater from etal plating company.The purpose of this research is to utilize coconut shell charcoal and soil humus as a low-cost and ready-made alternative material to reduce the concentration chromium (Cr) on wastewater. Humus was taken from Baturraden region and was isolated using NaOH extraction and was furthermore purified using mixtures of HF(aq): HCl(aq). Coconut shell charcoal was produced and was mixed with the humus. Adsorption process was carried out by batch method on variations of charcoal: humus composition, pH, and contact time. Humus soil was identified using infrared spectrophotometry (IR). Determination of chromium concentration was performed using atomic absorption spectroscopy (AAS).The purified humus yielded was 25.92% (w/w), with 34.18% moisture, and ash content of 18.09%. The results showed that the variation of composition ratio of 2:1 charcoal and humus produced the greatest percent reduction of 18.20%, and the optimum pH for the adsorption is 9. For the variation of contacts time, the optimum reaction time is at 180minutes with decreasing concentration of Pb up to 56.07%.
PEMANFAATAN KATALIS NI/ZEOLIT PADA HIDROGENASI KATALITIK ETIL PALMITAT MENJADI SETIL ALKOHOL Dwi Kartika; Triyono Triyono; Karna Wijaya; Dewi Yuanita L; D. Setyawan PH D. Setyawan PH
Molekul Vol 5, No 2 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (111.534 KB) | DOI: 10.20884/1.jm.2010.5.2.80

Abstract

The catalytic hydrogenation of methyl palmitate to cetyl alcohol using Ni supported on activated natural zeolite catalysts (Ni/Zeolite) has been carried out. In this work, the effect of catalyst amounts and H2 flow rate on methyl palmitate conversion and yield of cetyl alcohol were studied. Catalytic hydrogenation was performed in stainless steel fixed bed reactor. The methyl palmitate (10 g) was loaded into the reactor vessel at 400 °C for 30 minutes. In order to study the effects of catalyst amount at constant H2 flow rate, the catalyst were varied i.e. 5, 10, and 15 g. To investigate the effects of H2 flow rate were varied from 20, 40, and 60 mL.min-1 at constant catalyst amount. The composition of the products was analyzed by GC and GC-MS. The results showed that methyl palmitate conversion increase with the increasing of catalyst amount. The highest methyl palmitate conversion (45.62 %) and yield of cetyl alcohol (36.44 %) were obtained for 15 g catalyst and 40 mL. min-1 H2 flow rate.
PENGARUH TRITERPEN TOTAL PEGAGAN (Centella asiatica (L) Urban) TERHADAP FUNGSI KOGNITIF BELAJAR DAN MENGINGAT PADA MENCIT JANTAN ALBINO (Mus musculus) YANG DIHAMBAT DENGAN SKOPOLAMIN Herlina Herlina
Molekul Vol 5, No 2 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (151.819 KB) | DOI: 10.20884/1.jm.2010.5.2.81

Abstract

Pegagan (Centella asiatica (L) Urban) has been described to posses CNS effects such as improving cognitive function, learning and memory. The aim of the research was to evaluate the effects of total triterpen’s pegagan extract on cognitive functions as the learning and memory performance in male albino mice (Mus musculus) inhibited by scopolamine. The research design was Complete Randomized Design (RAL) – factorial on thirty six mice divided into 4 groups. One control group received only aquabidest (negative control). Three treatment groups received total triterpen 16 mg/kg BW, 32 mg/kg BW orally and piracetam 500 mg/kg BW by intra peritoneally (positive control) for 21 days. Data indicating learning and memory process of all subjects were obtained from one-trial passive avoidance test. Data were analyzed by two way ANOVA and BNT (p<0,05). Result showed that total triterpen 32 mg/kg BW had significantly prolonged the retention time compared to control group indicating improvement in cognitive function (505,03 second vs -18,53 second) (p<0,05) and it was not significantly different to piracetam 500 mg/kg BW group (505,03 second vs 522,48 second) (p>0,05). In conclusion, total triterpen from pegagan (Centella asiatica (L) Urban) improved learning ability and memory of male albino mice (Mus musculus) even though, it was inhibited by scopolamine.
DEKOLORISASI LIMBAH BATIK TULIS MENGGUNAKAN JAMUR INDIGENOUS HASIL ISOLASI PADA KONSENTRASI LIMBAH YANG BERBEDA Ratna Stia Dewi; Sri Lestari
Molekul Vol 5, No 2 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (123.596 KB) | DOI: 10.20884/1.jm.2010.5.2.79

Abstract

Azo as batik dyes are textile dyes which difficult to degradate. Fungus as bioremidiation organism are choosed to decolorize the dyes because its transformation ability, it can degradate toxic dyes component. The aim of research are to explore the fungus from Sokaraja-Banyumas batik industrial dyestuff, to know potential indigenous species wich can degradate it, to know dyestuff consentration which is degradated.Result of research showed that the isolation process of indigenous fungi from batik dyestuff in District Sokaraja Banyumas produce 4 isolates that have the potential dekolorization, they are 3 isolates of the genus Fusarium, and 1 isolate of the genus Aspergillus. That indigenous fungus can be used to decolorize dyestuff batik the decolorize percentage 69.346% -82.421%.

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