Judul: Mempelajari Pengaruh Iradiasi Gamma terhadap Irisan Rebung Betung dalam Kemasan Plastik
Abstrak: Tanaman Bambu sejak lama telah memegang peranan penting dalam kehidupan masyarakat Indonesia khususnya di pedesaan antara lain dalam hal penyediaan kebutuhan dasar manusia seperti makanan, bahan konstruksi dan pemukiman.
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Judul: Pengaruh kadar urea dan polimerisasi radiasi metil metakrilat (MMA) terhadap sifat fisik dan mekanik bambu betung (dendrocalamus asper (schult f.) backer ex heyne)
Abstrak: Bambu betung (Dendrocalamus asper (Schult f.) Backer ex Heyne), termasuk hasil hutan non kayu yang dikenal sebagai bahan bangunan tradisional dan dapat dijadikan sebagai alternatif bahan substitusi untuk memenuhi bahan konsumsi kayu yang persediaannya saat ini cenderung menurun. Metode polimerisasi radiasi adalah salah satu upaya untuk meningkatkan kualitas bambu yaitu melalui proses impregnasi monomer ke dalam bambu kemudian diiradiasi dengan sinar Gamma atau berkas elektron sehingga monomer tersebut akan berubah menjadi plastik (Utama, 1994). Urea dalam hal ini berguna sebagai pemekar, sehingga diharapkan kadar polimer yang terbentuk dapat maksimal, sedangkan pemberian proses vakum dalam hal ini bertujuan untuk menghilangkan air bebas, dan isi rongga sel agar jumlah polimer yang terbentuk juga dapat maksimal. Tujuan penelitian ini adalah untuk mempelajari pengaruh penambahan urea dan polimerisasi radiasi sinar Gamma yang dilakukan terhadap monomer metil metakrilat (MMA) melalui proses vakum terhadap sifat fisik dan mekanik bambu plastik betung (Dendrocalamus asper (schult f.) Backer ex Heyne).
Keyword: bambu betung

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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