Judul: Pola Sebaran dan Perubahan Tutupan Hutan dan Lahan pada Ekosistem Transisi di Kabupaten Bungo, Tebo, dan Tanjung Jabung Barat Provinsi Jambi
Abstrak: Land cover change is an issue crucial in the process of change of GHG (Green House Gass). This study examines patterns of forest cover and land cover and their changes, especially in the transition ecosystems using remote sensing technology in Jambi Province Regencies.The study areas include Bungo, Tebo, and Tanjung Jabung Barat. The analysis of the patterns were performed using quadrat and nearest neighbor analyses. On the basis of those two approaches, this study shows that the distribution pattern of primary forest, secondary forest, rubber plantation, and oil palm plantation in 1990, 2000, 2011, and 2013 are clumped (clustered) while the distribution pattern of the jungle rubber was dispersed. The pattern of spatial changes from primary forests to secondary forests for the period 1990 - 2000 were clumped, while for the period of 2000 - 2011 were dispersed. The pattern of change from forest to oil palm plantations and rubber plantations were clumped for the period 1990 – 2000 and 2000 – 2011, and the pattern of change from forest to jungle rubber for the period 2000 – 2011 were clumped.
Keyword: Bogor Agricultural University (IPB), quadrat analysis, nearest neighbor, land cover, forest cover, ecosystems transition

Judul: Deteksi Pola Spasial Sebaran dan Perubahan Tutupan Lahan dan Hutan di Kabupaten Tanjung Jabung Timur, Muaro Jambi, dan Kota Jambi, Provinsi Jambi
Abstrak: Pola sebaran dan perubahan tutupan lahan dan hutan sangat berperan penting dalam perencanaan tata ruang wilayah. Penelitian yang dilakukan di Kabupaten Tanjung Jabung Timur, Muaro Jambi, dan Kota Jambi, Provinsi Jambi bertujuan untuk mengidentifikasi pola spasial tutupan hutan dan perubahannya dari tahun 1990 hingga tahun 2013. Data utama yang digunakan dalam penelitian ini adalah citra Landsat multiwaktu dari tahun 1990 hingga tahun 2013. Metode untuk mengetahui pola sebaran dan perubahan tutupan lahan dan hutan adalah metode tetangga terdekat. Hasil kajian menunjukkan bahwa pola spasial sebaran hutan, perkebunan, pertanian, perkebunan kelapa sawit, dan HTI karet serta kebun karet adalah mengelompok pada tahun 1990, 2000, 2011, dan 2013. Pola spasial perubahan hutan menjadi tanah kosong pada tahun 19902000 adalah menyebar, sedangkan pola spasial perubahan tersebut pada tahun 20002011 dan 20112013 adalah mengelompok. Pola spasial perubahan hutan menjadi perkebunan kelapa sawit pada tahun 20002011 adalah menyebar, sedangkan pola spasial perubahan hutan menjadi perkebunan kelapa sawit pada tahun 19902000 dan 20112013 adalah mengelompok. Pola perubahan hutan menjadi semak belukar, belukar rawa, dan savana, hutan menjadi perkebunan, hutan menjadi pertanian, dan hutan menjadi HTI karet serta kebun karet pada tahun 19902000, 20002011, dan 20112013 cenderung mengelompok. Kecenderungan perubahan hutan semakin meningkat seiring bertambahnya jarak dari wilayah pemukiman, sedangkan perubahan hutan cenderung semakin menurun seiring bertambahnya jarak dari akses jalan.
Keyword: analisis tetangga terdekat, citra Landsat, pola spasial, tutupan hutan, tutupan lahan

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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