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All Journal Jurnal Riset Kimia Buletin Ilmu Makanan Ternak
M. Sitorus
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Chemistry Earth & Planetary Sciences Veterinary

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STUDI PENGARUH WAKTU, SUHU DAN JUMLAH DEHIDRATOR PADA DEHIDRASI RISINOLEAT MINYAK JARAK DENGAN P2O5 M. Sitorus; S. Ibrahim; H. Nurdin; D. Darwis
Jurnal Riset Kimia Vol. 4 No. 1 (2010): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v4i1.70

Abstract

 The aims of study are to optimize the reaction’s parameters i.e. time, temperature, and amount of dehydrator’s agent on the dehydration of ricinoleic of castor oil into dehydrated castor oil (DCO) by mean P2O5. DCO is the mixed of linoleic acid (LA) and conjugated linoleic acid (CLA). Dehydration were carried out using various of time, temperature, and amount of dehydrator. The reaction medium was maintained under vacuum, gentle bubbling with nitrogen, magnetically stirred and used Zn’s powder as antipolymerization’s agent. The changes composition of DCO were analyzed by GC, and identification by FTIR and GC-MS and compared to CLA’s standard. Best result were obtain for 4 h, at 200°C and 3% (w/w) P2O5. DCO compositions were : 1.02% of (9c/t – 12c/t) linoleic; 41.97% of (9c/t – 12t/c) linoleic ; 19.50% of (9c/t – 11t/c) CLA ; 19.79% of (9t – 11t) CLA; and 0.90% of residual’s of ricinoleic. The yields of dehydration was 98.98%, and the decreased 92.98% intensities of –OH wives number in FTIR spectra’s castor oil comparison with DCO to indicated transform of ricinoleic by dehydration. Both wave number of alkenes (C=C) at FTIR DCO spectra was indicated to formed of conjugated alkenes (CLA). The ratio of CLA : linoleic was 0.92 : 1 with achievement of 63.5% relatively to CLA standard with ratio of CLA : linoleic was 1.45 : 1. Keywords: Time, Temperature, Amount of dehydrator, Dehydration of ricinoleic   
Efek Fermentasi Anaerob terhadap Kadar Sianida Biomas Tanaman Singkong Pahit (Manihot Esculenta) Yuli Retnani; T. Sutardi; M. Sitorus
Buletin Ilmu Makanan Ternak Vol. 10 No. 1 (1990): Buletin Ilmu Makanan Ternak
Publisher : Buletin Ilmu Makanan Ternak

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Abstract

The research was done to rest: a) If anaerob fermentation could destroy cyanogenic glucoside, b) If silage of cassava plant, which was high in nutritive value and low cyanide content, was influenced by the proportion of roots, stems and leaves in the silage. The material used in this research was Pengkang variety, a bitter cassava plant, a nine months old. The treatments were 10 different silage of ration for silage with different periods of fermentations, i.e: 0, 7, 21 and 35 days. The split plot design and polynomial orthogonal test were applied for the statistical analysis.The result of this experiment showed that the decreasing in cyanide acid content was affected by the fermentation period (p<0.01), the proportion of cassava plant biomass (p<0.01) as well as by the interaction between the fermentation period and the proportion of cassava plant biomass (p<0.01). The best silage was obtained from the cassava plant biomass that consisted of 25% roots, 25% stems and 50% leaves that was fermented for 21 days. This silage had the lowest cyanide acid content, and the highest crude protein, crude fiber, TDN content and as well as the highest digestibility for Ruminants.
Co-Authors D. Darwis H. Nurdin S. Ibrahim T. Sutardi Yuli Retnani