Judul: Perubahan Penutupan Lahan dan Faktor Penyebabnya di Taman Nasional Rawa Aopa Watumohai, Provinsi Sulawesi Tenggara.
Abstrak: Land cover change is a common phenomenon faced is the conservation area management in Indonesia, including Rawa Aopa Watumohai National Park. This research aims to analyze the land cover change and it’s causing factors. The data carried out on August 2014 using Geographic Information System (GIS) including groundcheck and respondent interview. This research resulted the land cover change from 1981-2013. The most changing land cover is the lowland mountain forest which was converted is to dryland agriculture with 7 553.58 hectare of total area in 1981-2001. Land cover change is caused by economic needs along with reform momentum in 1997, weak law enforcement, lack of the number of personnel, lack of local government support, and landuse needs supported by capital owner.
Keyword: forest encroachment, landcover change, Rawa Aopa Watumohai national park

Judul: Perubahan Tutupan Lahan di Taman Nasional Bukit Barisan Nama NIM Selatan Provinsi Lampung
Abstrak: National Park is a conservation nature area which has function to protect life support system, maintain flora fauna and its ecosystem, which is managed by zonation system. The zonation can be divided into core zone, utilization zone and other based on the necessity. However, National Park is still facing problem such as illegal poaching, illegal logging, forest encroachment, and agrarian conflict to national park border. One of national park which has such kind of problem is Bukit Barisan Selatan National Park. The research is aimed at investigation of land use/land cover and its causes. After conducted the research by using GIS and interviewed some participants, the result showed that forest cover is decreased during period of 1991 to 2013. This decrease is due to forest encroachment, in which forest was converted into coffee plantation. In fact, it was happened before the National Park establishment.
Keyword: Bogor Agricultural University (IPB), land cover change., forest encroachment, Bukit Barisan Selatan national park

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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