Judul: Perbandingan fenologi dekomposer pada empat tipe ekosistem yang berbeda
Abstrak: Hutan sebagai salah satu bentuk ekosistem memiliki peranan yang sangat penting bagi kehidupan fauna tanah. Fauna tanah memiliki peranan dalam proses dekomposisi. Proses dekomposisi sangat penting dalam menyediakan unsur hara guna pertumbuhan pohon. Penelitian ini bertujuan untuk menghitung kelimpahan fauna tanah, mengetahui jenis yang mendominasi pada setiap ekosistem dan laju dekomposisi pada setiap ekosistem. Kelimpahan fauna tanah rata-rata dan kekayaan jenis rata-rata tertinggi terdapat pada ekosistem Oil Palm Plantation. Tingginya kelimpahan fauna tanah pada suatu ekosistem dapat dipengaruhi oleh kondisi habitat. Keragaman jenis rata- rata dan kemerataan jenis rata- rata tertinggi terdapat pada ekosistem Rubber plantation. Kesamaan jenis tertinggi terdapat pada ekosistem Oil Palm Plantation dengan Rubber plantation. Laju dekomposisi sangat dipengaruhi oleh jumlah individu yang ditemukan pada setiap ekosistem. Pada ekosistem Rubber plantation mengalami penurunan laju dekomposisi tercepat. Jenis Collembola, Acarina dan Formicidae diduga memiliki peranan paling penting dalam proses dekomposisi. Jenis yang mendominasi pada setiap ekosistem terdiri dari Homidia sp, Dermacentor sp, Polydesmus sp, Gulumna sp, Freyana sp serta beberapa jenis semut dan rayap.Keberadaan dari masing-masing individu sangat dipengaruhi oleh beberapa faktor iklim diantaranya suhu dan kelembaban.
Keyword: Collembola, decomposition, decomposition rate, fauna of soil

Judul: Komunitas Fauna Tanah Pada Empat Tipe Ekosistem yang Berbeda.
Abstrak: Deforestation or changes in the function from forest to non-forest ecosystems has been playing a role in the change of ecosystem and species in it. Soil fauna is one of is an interesting aspect to be studied. This experiment was conducted in Bungku, District Bajubang, Batanghari Regency, Jambi. Sampling technique using hand sorting method in fourth ecosystem. The fourth ecosystem mentioned is secondary forest (BF), jungle rubber (BJ), oil palm plantations (BO), and rubber plantations (BR). The results found there were 271 individuals are included in 43 familys, 19 orders from 7 class i.e. Insecta, Chilopoda, Collembola, Clitellata, Malacostraca, Arachnida, and Diplopoda, with 2 phylum i.e. Arthropoda and Annelida. Secondary forest is an ecosystem that relatively stable with the value of diversity index H '= 2.50, index of richness DMg = 5.05, and index of evenness E = 0.81. General distribution pattern on the four ecosystems is uniform, with Id value <1. The high diversity of soil macro-fauna was related with soil fertility.
Keyword: Jungle rubber, oil palm plantation, rubber plantation, secondary forest, soil fauna

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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