Judul: Perubahan Tutupan/Penggunaan Lahan Sebelum dan Sesudah Kebakaran Hutan Menggunakan SIG di Kalimantan Barat
Abstrak: Selama dua dekade terakhir, seperempat hutan tropik di Kalimantan telah mengalami perubahan menjadi daerah pertanian serta daerah perkotaan oleh manusia. Perubahan tersebut diakibatkan oleh adanya kebakaran hutan. Kebakaran dijadikan alat untuk membuka lahan untuk lahan pertanian maupun perkebunan dengan alasan mudah dan murah untuk dilakukan. Studi mengenai kaitan penyebaran titik panas serta kebakaran hutan dan lahan dengan perubahan tutupan/penggunaan lahan perlu dilakukan agar dapat dijadikan data acuan pengelolaan sumber daya alam hayati dan pemantauan kebakaran hutan di wilayah Kalimantan. Pada tahun 2011 hingga 2013 ditemukan 2 066 titik panas yang terindikasi sebagai kebakaran hutan. Titik panas tersebut ditemukan paling banyak di daerah pertanian lahan kering campur (33.00%), hutan rawa sekunder (18.68%), dan hutan sekunder (14.79%). Tiga tahun setelah kejadian, perubahan tutupan lahan paling banyak menjadi hutan lahan kering campur (25.57%), perkebunan (28.02%), dan pertanian lahan kering (10.91%). Hutan rawa sekunder dan hutan sekunder menurun menjadi masingmasing hanya sebanyak 3.63% dan 6.98%. Untuk penggunaan lahan, titik api banyak ditemukan pada areal penggunaan lain (49.92%) dan diikuti hutan tanaman industri (18.50%). Hal ini menunjukkan kebakaran hutan yang terjadi lebih banyak disebabkan oleh pembukaan lahan yang dilakukan masyarakat dibandingkan oleh perusahaan.
Keyword: Kalimantan Barat, kebakaran hutan, perubahan, titik panas, tutupan lahan

Judul: Hubungan antara Titik Panas dengan Perubahan Penutupan/ Penggunaan Lahan (Studi Kasus: Kabupaten Kapuas, Provinsi Kalimantan Tengah)
Abstrak: Land and forest fires in Indonesia have become a serious problem since 1982/1983. Annually the area that was burned widespread, which is caused by the increasing number of forest converted to plantations, agriculture, settlements, and so forth. Indicator commonly used for early detection of forest and land is hotspots, obtained from a meteorology satellite remote sensing. The objectives of this research are to analyze the distribution pattern of hotspots in Kapuas District, analyzed land cover/use change in Kapuas District, analyzed the relationship between hotspots and land cover/use change in Kapuas District, and analyzed the relationship hotspots and rainfall anomaly in Kapuas District. The maximum distribution of hotspots during 2005 to 2011 was indicated in 2006 and 2009; it was expected because of the effect of long term dryness (El-Nino), so the intensity of the fire increased. During 2005 to 2011, many hotspots identified in shrub swamps, shrub, plantations, secondary swamp forest, and secondary upland forest. Hotspots are identified on the site, possibly due to a fire caused by the preparation of agriculture or plantation. It is marked by an increase in land cover change to plantation up to 49.5%, while the secondary swamp forest and secondary upland forest decreased up to 19.2% and 7.83%. The rainfall anomaly is also expected to be able to affect the number of hotspots. When rainfall in the condition of subnormal, then hotspot identified more than when rainfall was above normal.
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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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