Judul: IPB (Bogor Agricultural University)
Abstrak: Tujuan penelitian ini adalah untuk mempelajari laju pertumbuhan, produksi dan kualitas karkas, sifat fisik daging, komposisi kimia daging, dan lemak dari sapi Sumba Ongole (SO), Brahman Cross (Bx) dan Australian Commercial Cross (ACC) yang dipelihara secara intensif pada berbagai bobot potong.
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Judul: IPB (Bogor Agricultural University)
Abstrak: Penelitian bertujuan menggali clan mengungkapkan sifat-sifat produksi, reproduksi serta peranan sapi ini dalam sistem usaha tani dan hubungannya dengan kondisi fisik, sosial dan ekonomi daerah sosial ekonomi petani ternak sapi, yang ditinjau dalam bentuk kelayakan dari segi biologis, segi ekonomi, segi sosial, dan kelayakan dipandang dari segi lingkungan. Selanjutnya dicoba qempersleh rumus untuk meramalkan bobot hidup ternak sapi dalam rangka menanggulangi kesulitan mendapatkan alat timbangan ternak. Aasil penelitian ini diharapkan akan mernberi petunjuk dan pedoman kemungkinan pengembangan ternak sapi dalam rangka peningkatan penyediaan bahan pangan yang berasal dari ternak daging dan menambah pendapatan petani ternak, memperluas lapangan usaha peternakan sapi pedaging di Kabupaten Pesisir Selatan, Sumatera Barat.
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Judul: Pemurnian dan karakterisasi protein inhibitor RNA helikase virus hepatitis C
Abstrak: Hepatitis C virus (HCV) infection is the second most common chronic viral infection in the world with global prevalence. This infection is contribution to chronic hepatitis and liver cirrhosis, often leading to hepatocellular carcinoma. There is no effective drug and vaccine available against HCV. The current standard treatment, a combination of pegylated interferon-α with ribavirin, is limited by its suboptimal response rate in a significant patient population, side effects, and affordability. Therefore, development of effective drug is needed. One approach to find out the candidate of antiviral drug is to discover the inhibitor of enzyme that essential for virus replication, such as RNA helicase. Streptomyces chartreusis 5-095 produce the inhibitor of HCV RNA helicase. The aim of this study was to purify the protein inhibitor which has inhibition activity against ATPase activity of RNA helicase HCV from S. chartreusis 5-095. The supernatant of culture S. chartreusis 5-095 exhibited high inhibiton activity against ATPase activity of RNA helicase HCV (approximately 72%) at 10 days of incubation. The extracellular protein inhibitor was partially purified by procedures of precipitation with ammonium sulfate to 65% saturation and gel filtration (Sephadex G50) using methanol water solution (4:6) as an eluen. The purity of protein inhibitor was monitored by SDS PAGE. The protein inhibitor showed a relative molecular mass were estimated to be 14 kDa and increased the purity 23,08 fold than those of the crude protein. The specific activity and IC50 after purification were 13,1338 U/mg and 0,0767 mg/mL, respectively. The activity of purified protein inhibitor showed its stability over pH range from 5-8 and optimum at pH 7,4. The inhibition activity showed its stability up to 70% at temperature 100 oC. The purified protein inhibitor relatively stable its activity at storage in the range of -20 oC to room temperature for 35 days.
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