Judul: Perbedaan pengelolaan usaha pekarangan petani salak pondoh dengan petani salak warisan: studi kasus di desa Merdikorejo, Sleman
Abstrak: Tanaman salak ( Salacca edulis Reinw) telah lama menjadi tanaman usaha pekarangan yang terpenting di desa Merd ikorej o, Sleman sehingga pekarangannya disebut pekarangan petani salak. Sejak tahun 1980 sebagian petani menggunakan salak pondoh untuk mengg·anti salak warisan orang tuanya dan memperbaiki pertanaman pekarangannya. Akibatnya tumbuh beberapa pekarangan petani salak pondoh. Petani lain yang masih mengusahakan salak warisan disebut petani salak warisan. Dari dua macam pekarangan petani salak timbul permasalahan perbedaan pengelolaan usahanya yang tidak lepas dari perbedaan pertanaman dan lingkungan pekarangan serta faktor personal petani.
Keyword: Salacca

Judul: Analisis produksi dan pemasaran salak pondoh (Salacca edukis, R.) : Studi kasus di desa Bangnunkerto, Kecamatan Turi Kabupaten Sleman Daerah Istimewa Yogyakarta
Abstrak: Penelitian yang dilakukan di Desa Bangunkerto, Kecamatan Turi, Kabupaten Sleman ini bertujuan untuk mengetahui gambaran umum usahatani Salak Pondoh, sistem produksi dan pemasaran serta permasalahan dan kebijaksanaan dalam pengembangan Salak Pondoh. Hasil penelitian menunjukkan bahwa usahatani Salak Pondoh di Desa Bangunkerto ini telah berjalan lebih dari sepuluh tahun dan sebagian besar petani menjadikan tanaman ini sebagai tanaman pokok dalam usahataninya, karena lahan di desa ini lebih sesuai untuk ditanami Salak Pondoh daripada ditanamai padi. Usahatani yang dilakukan petani meliputi pembibitan, pengolahan lahan, pemupukan, pemangkasan dan pemberantasan hama dan penyakit. ...
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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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