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All Journal Jurnal Zeolit Indonesia IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) SRIWIJAYA JOURNAL OF ENVIRONMENT
Nirwan Syarif
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Energy Environmental Science Public Health

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THE DYNAMICS MOLECULER OF WATER MOLECULE ABSORPTION IN SILICATE ZEOLITE Nirwan Syarif
Jurnal Zeolit Indonesia Vol. 6 No. 2 (2007)
Publisher : Jurnal Zeolit Indonesia

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Abstract

The water molecule dynamics absorbed at silicalite zeolite was studied with molecule dynamics technique using the computer. This paper reports the effect of temperature on behavior of dynamic system. The result showed the improvement of diffusion coefficient and diffusion activation energy along with the improvement of temperature. Improvement of temperature cause the change of the contact distance of the water molecule in zeolite molecule.
Electrochemical Impedance Spectroscopy of Polyvinylalcohol Based Gel Electrolyte Nirwan Syarif; Nurlisa Hidayanti; Edy Herianto Majlan; Monica Sari Jayanti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 2, No 1 (2017): February 2017
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v2.i1.16

Abstract

Research on the effect of electrolyte ammonium salt, concentration electrolyte with plasticizer to ionic and electronic conductivity of polymer gel electrolyte has been conducted with the variations of two electrolyte NH4Cl-PVA and NH4SCN-PVA at a concentration of 10, 30, 40 (wt%). The measurement of using ionic conductivity by using  impedance spectroscopy method showed that the highest value was 0.0156 Scm-1 i.e. in the  54.6% propilen carbonate with 40%  NH4Cl and PVA. The lowest value was 0.009 Scm-1 i.e. in the NH4SCN based electrolyte without propilene carbonate and electronic conductivity showed that the highest value was 0.0156 Scm-1 i.e. 40% NH4Cl-PVA and NH4SCN-PVA and the lowest value was 0.009 Scm-1, i.e. in the NH4SCN based electrolyte without propilene carbonate. Factorial analyses showed that the concentrations of electrolyte and the plasticizer affect conductivity value. FTIR (Fourier Transform Infrared) measurement showed that the  addition of propilene carbonate did not show new bond formation between electrolyte and PVA. It can be shown in absence of characteristic wave number for propilene carbonate and NH4+ ion.Keywords: DOE, plasticizer,  propylenecarbonate, ionic, electronic, conductivity
Colony Morphology of Yeast Isolates from Tuak and Its Application in Producing Ethanol From Sugarcane Bagasse Hermansyah Hermansyah; Feggy Arini; Nirwan Syarif; Heni Yohandini
Sriwijaya Journal of Environment Vol 1, No 3 (2016): Biodiversity
Publisher : Program Pascasarjana Universitas Sriwijaya

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Abstract

Abstract: Colony morphology yeast isolates from tuak and its application in producing ethanol from sugarcane bagasse has been conducted. Yeast isolates used in this work were HT4, HT5, and HT20 obtained from Tuak. These isolates have cream to yellow in color, spherical to oval in shape, and grow as budding cells. Our goal is to find yeast isolates used as microbial agent in fermentation process producing ethanol from lignocellulosic biomass as raw material.  Based upon morphology showed that these isolates were Candida species.  Isolate HT5 then used to see its potent  as  agent in bioethanol production.  Fermentation of 5 g sugarcane bagasse substrate resulted 0.0008% ethanol.  This results indicated that isolate has a potent as microbial agent for fermentation, however the optimum condition of process is needed to furthermore study.    Keywords: Candida species, bioethanol, TuakAbstrak (Indonesian): Telah dilakukan penelitian terhadap morfologi koloni dari isolat khamir dari tuak dan aplikasinya dalam produksi etanol dari ampas tebu.  Isolat khamir yang digunakan adalah koloni HT4, HT5, dan HT20  yang telah didapat dari tuak.  Isolat-isolat ini memiliki bentuk warna krem hingga kuning dengan bentuk bulat hingga oval dan pertumbuhannya dengan membentuk tunas.  Tujuannya adalah untuk mendapatkan isolat ini akan digunakan sebagai agen mikroba pada proses fermentasi menghasilkan etanol dari biomasa lignoselulosa sebagai bahan bakunya.   Berdasarkan morfologi menunjukan bahwa isolat-isolat ini adalah spesies Candida.  Isolat HT5 selanjutnya digunakan untuk melihat potensinya sebagai agen dalam produksi bioetanol.  Fermentasi menggunakan 5 g subtrat ampas tebu menghasilkan etanol  sebesar 0.0008%.  Hasil ini mengindikasikan bahwa isolat memiliki potensi sebagai agen fermentasi menghasilkan etanol akan tetapi masih perlu diteliti lebih lanjut untuk kondisi optimum prosesnya.Kata kunci: spesies Candida, bioetanol. tuak
Co-Authors Edy Herianto Majlan Feggy Arini Heni Yohandini Hermansyah Hermansyah Monica Sari Jayanti Nurlisa Hidayanti