Judul: Pemetaan Potensi Hutan Rakyat Menggunakan Teknik Gis Di Kecamatan Sambirejo Kabupaten Sragen Tahun 2014
Abstrak: Peningkatan permintaan kayu menjadi peluang tumbuhnya potensi hutan rakyat. Guna mendukung pengelolaan hutan rakyat berkelanjutan diperlukan ketersediaan data aktual. Penelitian ini mengidentifikasi potensi aktual hutan rakyat di Kecamatan Sambirejo, Kabupaten Sragen melalui teknik inventarisasi berbasis sistem infomasi geografis (GIS). Tujuan utama penelitian ini adalah untuk menghitung, memetakan, dan menganalisis sebaran potensi hutan rakyat menggunakan citra Landsat 8 (OLI). Metode pengambilan data potensi tegakan dilakukan secara purpossive sampling, sedangkan klasifikasi tutupan lahan dan analisis sebaran luas hutan rakyat dilakukan melalui interpretasi visual. Hasil interpretasi visual citra Landsat 8 (OLI) menghasilkan 7 kelas tutupan lahan meliputi badan air, hutan negara, hutan rakyat, lahan terbangun, rumput, sawah, dan tambang. Hutan rakyat memiliki luas lahan sebesar 1307.08 ha dengan nilai potensi per hektar sebesar 58.34 m3/ha dan potensi total sebesar 76 249.67 m3.
Keyword: hutan rakyat, interpretasi visual, pemetaan, potensi tegakan, sistem informasi geografis

Judul: Pendugaan Potensi Tegakan Hutan di Sub DAS Cimuntur, DAS Citanduy, Kabupaten Ciamis, Jawa Barat.
Abstrak: Hutan memiliki peranan penting dalam pemenuhan kebutuhan manusia secara ekonomi, sosial dan lingkungan. Guna mendukung pemenuhan tersebut terhadap hasil hutan terutama kayu diperlukan informasi mengenai potensi hutan secara aktual. Tujuan dari penelitian ini yaitu mengidentifikasi tutupan lahan hutan menggunakan citra Landsat 8 (OLI) dan melakukan pendugaan potensi tegakan hutan di Sub DAS Cimuntur. Metode pengambilan data potensi tegakan dilakukan secara purposive sampling, sedangkan klasifikasi tutupan lahan dan analisis sebaran potensi hutan dilakukan melalui interpretasi visual. Hasil interpretasi visual citra Landsat 8 (OLI) menghasilkan 5 kelas tutupan lahan meliputi hutan tanaman, pemukiman, pertanian lahan kering campur (hutan rakyat), sawah, dan tubuh air. Hutan tanaman memiliki pendugaan potensi ratarata sebesar 347.85 m3/ha sedangkan hutan rakyat sebesar 201.63 m3/ha dan potensi total tegakan hutan di Sub DAS Cimuntur sebesar 214.35 m3/ha.
Keyword: hutan, interpretasi visual, volume tegakan hutan

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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