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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
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Search results for , issue "Vol 5, No 1 (2010)" : 7 Documents clear
PEMBUATAN DEKSTRIN DARI PATI UBI KAYU MENGGUNAKAN ENZIM AMILASE DARI AZOSPIRILLUM sp. JG3 DAN KARAKTERISASINYA Dian Riana Ningsih; Ari Asnani; Amin Fatoni
Molekul Vol 5, No 1 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.748 KB) | DOI: 10.20884/1.jm.2010.5.1.72

Abstract

Amylase enzyme is used to hydrolyze starch into simpler molecules such as dextrin. Amylase can be isolated fromAzospirillum sp. JG3 bacteria. The purpose of this study was to characterize dextrins from cassava starch (Manihot esculenta) is catalyzed by the enzyme amylase from Azospirillum sp. JG3 bacteria. Stages of this study are: determination of optimum substrat and to analyze the chemical and physical dextrins including moisture content, ash content, dexstrosa equivalent (DE) and the yield obtained. The result of this research showed that optimum condition hydrolysis starch of cassava that using amylase from Azospirillium sp. JG3 bacteria was acquired at substrate concentration 3% and the results of analysis obtained dextrins include yield of 96.67%, water content of 9.39%, 0.25% ash content and dexstrosa equivalent (DE) of 16.55.
OPTIMASI PENURUNAN NILAI BOD, COD DAN TSS LIMBAH CAIR INDUSTRI TAPIOKA MENGGUNAKAN ARANG AKTIF DARI AMPAS KOPI Irmanto Irmanto; Suyata Suyata
Molekul Vol 5, No 1 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.861 KB) | DOI: 10.20884/1.jm.2010.5.1.73

Abstract

Activated carbon from coffee dregs for TSS, BOD and COD removal of tapioca industrial wastewater has been developed. The research aimed to know the quality of activated carbon from dregs of coffee as adsorbent, consist of total rendemen, water content, ashes content and iodium adsorption; to know about the optimum contact time and optimum pH from activated carbon on reducing BOD, COD and TSS value from tapioca industrial wastewater and also to know about the decrease percentage of BOD, COD and TSS value using activated carbon from dregs of coffee. Activated carbon from dregs of coffee are activated using HCl 0,1 N and carbonization at 350°C in muffle furnace. Then, activated carbon was contacted with the tapioca industrial wastewater and used on decreasing BOD, COD and TSS value from tapioca industrial wastewater with contact time varieties 0, 10, 30, 60, 90 and 120 minutes and at pH varieties of wastewater 4, 5, 6, 7, 8, 9 and 10. The decreasing of BOD value was measured by Winkler method, decreasing of COD value measured by iodometric method and decreasing of TSS value measured by gravimetric method. The result of the research showed that the activated carbon produced characteristic consist of rendemen 14,55%; water content 3,4%; ashes content 1,88% and iodium adsorption 750,25 mg/g. It is indicated that the activated carbon that is got from dregs of coffee fulfill the criteria required by SNI No. 06-3730-1995. The result of research also showed that the activated carbon from dregs of coffee could be used for reducing the BOD, COD and TSS value in tapioca industrial wastewater at the optimum contact time of 30 minutes and pH 7. The optimum percentage of activated carbon from dregs of coffee in decreasing BOD value of tapioca industrial wastewater are 33,51%; COD value 78,96% and TSS value 61,05%.
KECEPATAN ADUK DAN WAKTU KONTAK OPTIMUM PEMBUATAN BIODIESEL DARI MINYAK JELANTAH Dwi Kartika; Eva Vaulina; Senny Widyaningsih; Moch. Chasani
Molekul Vol 5, No 1 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.422 KB) | DOI: 10.20884/1.jm.2010.5.1.74

Abstract

Synthesis of biodiesel from waste cooking oil using activated natural zeolite catalyst has been done. Activation of the natural zeolite was done by refluxing with HCl 6M for 30 min, calcining and oxydizing at 500°C for 2 hours, consecutively. The variation of stirring speed were 350, 700, 1100 and 1200 rpm. The variation of reaction time were varied from 15, 30, 45, 60, and 120 min. The conversion of biodiesel was determined by 1H NMR spectrometer. The results showed that the optimum condition of biodiesel synthesis using esterification process were reached at 700 rpm and 15 minutes, which gave biodiesel conversion of 100%.
HIDRASI IKATAN RANGKAP C7-8 SENYAWA KALANON DAN UJI SITOTOKSISITASNYA TERHADAP SEL LEUKEMIA L1210 Mochamad Chasani; Eva Vaulina; Ponco Iswanto; Yayu Rahayu
Molekul Vol 5, No 1 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (195.933 KB) | DOI: 10.20884/1.jm.2010.5.1.75

Abstract

Calanone is anticancer compound that is isolated from species Calophyllum. The biological activity of calanone againts leukemia cell L1210 is relatively low showed by IC50 value at 59.4 μg/mL. A compound have a high biological activity if the value of IC50 under 10 μg/mL. This research aimed to obtained calanone hydrat compound which has a higher activity to inhibit leukemia L1210 cancer cell growth. Calanone hydrat compound is got through with two step reaction, first step was protonated double bond by acetic acid reagent and the second step is nucleophilic addition by water. Initial analysis for the synthesize product compound is done with thin layer chromatography (TLC) using n-hexane and ethyl acetate 2:1 (v/v) eluent. Coloum Chomatography and recrystallization is used to pure the synthesize product compound with n-hexane and methylen chloride 1:1 (v/v) solvent. The result analyzed by thin layer chromatography. The synthesized product give Rf at 0.4545 and rendement 4.72% (w/w), forming of brownish yellow chromatic powder and melting point at 190oC-192oC. Identification structure of synthesize product compound is done with mass spectrometer. The result of mass spectrometer identification were moleculer ion M+-18 (M+ 424) with fragments m/e=409, m/e=395, m/e=381, m/e= 331, m/e=317, m/e=303, me/=176, m/e=105, and m/e=77. Citotoxicity test againts leukemia cell L1210 yield the value IC50 equal to 45.64 μg/mL.
LAJU ADSORPSI DAN DESORPSI PARAQUAT PADA TANAH PERTANIAN DESA OESAO KECAMATAN KUPANG TIMUR Sherlly M.F. Ledoh; Hermania Em Wogo; Siti Arianti S.A
Molekul Vol 5, No 1 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (163.742 KB) | DOI: 10.20884/1.jm.2010.5.1.70

Abstract

The research about determination of kinetic adsorption and desorption rate of paraquat on agriculture area Oesao-east Kupang has been done. The aim of this research was to determine the kinetic of paraquat adsorption before and after saturated and to model the desorption. The research consisted of evaluation of the analitycal procedure for paraquat, pattern of soil kinetic adsorption and paraquat desorption. The result of procedure evaluation showed that reduced paraquat absorbed at λ maximum 606 nm and relative stability at 0-150 minutes. Constant of paraquat kinetic adsorption at natural state bigger than saturated state. k1 value at natural state was 0,011 per minute whereas k1 value at saturated state was 0,003 per minute. Desorption model of paraquat by using three desorbents were ammonium chloride, 29,2% of sea water salinity and aquadest showed the best desorbent was ammonium chloride, followed by sea water and aquadest.
PENURUNAN KADAR SIANIDA DALAM LIMBAH CAIR TAPIOKA MENGGUNAKAN FOTOKATALIS TiO2 Kapti Riyani; Tien Setyaningtyas
Molekul Vol 5, No 1 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (124.568 KB) | DOI: 10.20884/1.jm.2010.5.1.76

Abstract

Cyanide compound is one of the organic material contained in wastewater of tapioca production, which is a highly toxic substance for life. According to the results of physical and chemical properties of liquid waste samples of tapioca starch in the deposition process in the industry taken from Pancasan Village, Ajibarang, Banyumas, cyanide concentration in the effluent was 3.8 mg/L while the maximum level of cyanide allowed in industrial wastewater are 0.5 mg/L. Therefore, a method to reduce the concentration of cyanide is needed. One of the method is using of TiO2 catalyst. This study was aimed to determine the effect of the pH and UV irradiation time on photocatalytic activity of TiO2 to reduce the levels of cyanide on tapioca wastewater from PT. HARUM BUNGA, Purbalingga.This study uses a thin layer of TiO2 photocatalyst prepared by suspension of TiO2 coating on the glass plate that was dried at 120ºC and conducted with variations of pH that were 2, 5, 7, 8, 9, 10, and 13 in the wastewater to determine the optimum pH, continued by time variation of UV radiation for 1, 2, 4, 6, 8, 10, and 12 hours. The results showed that the largest percentage decrease in the concentration of cyanide occurs at pH 9 that is equal to 88.6361% and the largest percentage decrease in the concentration of cyanide by irradiation with UV light occurs after 10 hours irradiation, up to 93.7929%.
KARAKTERISTIK FILM TIPIS TiO2 DOPING NIOBIUM Bilalodin Bilalodin; Mukhtar Effendi
Molekul Vol 5, No 1 (2010)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (298.325 KB) | DOI: 10.20884/1.jm.2010.5.1.71

Abstract

Niobium (Nb) doped Titanium dioxide (TiO2) thin films have been successfully grown using spin coating method. Characterizations of thin films was carried out using EDAX (Energy Dispersion Analysis for X-Ray), XRD (X-Ray Diffaction) and SEM (Scanning Electron Microscope) to determine the microstructure of thin films. Determination microstructure, particularly of crystal structure was examined using ICDD data, whereas porosity calculation was done using the toolbox application on Matlab 6.1 software. EDAX, XRD and SEM characterization show that the thin films grown well at the Si substrates with the (002) field orientation is dominant and the thin film has the rutile structure. The TiO2 : Nb thin films product have granules round, uniform grain size and porosity value of about 41%.

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