Judul: Dekomposisi keragaman indeks diversitas plankton di Waduk Saguling dengan metode "ESS"
Abstrak: Tujuan penelitian ini adalah untuk mengetahui penerapan metode " Species Shared" (ESS) dalam mempelajari struktur komunitas Plankton dengan cara mengidentifikasi kontribusi faktor-faktor penjelas terhadap diversitas spesies plankton. Pengertian dasar dari ESS adalah nilai harapan banyaknya spesies yang sama-sama ada pada dua populasi yang menyebar multinominal….dst
Keyword: Statistical analysis, Expected species shared, Index diversity, Plankton

Judul: Analisis biplot untuk data komunitas plankton stasiun selacau, Waduk Saguling
Abstrak: Penerapan analisis biplot pada data ekologi komunitas plankton dipermukaan perairan Stasiun Selacau, waduk Saguling, menghasilkan penyajian visual tentang ketakmiripan antar spesies plankton, pola penyebaran banyaknya individu spesies plankton dani waktu kewaktu, serta komposisi spesies plankton dari waktu kewaktu. Banyaknya individu spesies plankton dipermukaan perairan Stasiun Selacau, waduk Saguling, dari bulan Agustus 1986 sampai dengan Februari 1987 didominasi oleh beberapa spesies. Penyebaran banyaknya individu dan komposisi spesies berubah dari waktu kewaktu dengan pola perubahan bersifat bulanan.
Keyword: Stasiun Selacau, Waduk Saguling, Komunitas Plankton

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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