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All Journal Molekul: Jurnal Ilmiah Kimia
Hartiwi Diastuti
Program Studi Kimia, Jurusan MIPA UNSOED Purwokerto
Chemical Engineering, Chemistry & Bioengineering Chemistry

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PENGARUH MEDIUM PERENDAM TERHADAP SIFAT MEKANIK, MORFOLOGI, DAN KINERJA MEMBRAN NATA DE COCO Senny Widyaningsih; Hartiwi Diastuti
Molekul Vol 3, No 1 (2008)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.457 KB) | DOI: 10.20884/1.jm.2008.3.1.44

Abstract

Nata de coco is bacterial cellulose which is produced by Acetobacter xylinum in fermentation process of coconut water. Based on its properties, nata de coco can be used as a membrane. Soaking medium in purification of nata de coco gel can influence structure, morphology, and performance of nata de coco membrane. First medium was NaOCl 0.05% and NaOH 5%, Second medium was ultrasonic. Third medium was NaOH 1% and CH3COOH 1%. Mechanical property were analysized based on its tensile strength. Morphology of membrane was analysized using SEM. Performance of membrane was determined based on its permeability. The result showed that nata de coco membrane which had the best value on mechanical properties, morphology, and performance was membrane in third medium.
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.
Co-Authors Purwati Purwati Senny Widyaningsih