Judul: Dampak Ritel Modern terhadap Omzet Pedagang Pasar Tradisional di Kota Bogor
Abstrak: This study analyzes the factors that influence changes in the turnover of traders in traditional markets, as well as competition, performance and characteristics of merchant traders in Bogor. The methods used in this study were a paired sample t-test and ordinal logistic regression. The results of the ordinal logistic regression showed that the factors that influence changes in a merchant turnover are education, number of buyers, diversification of products, and distance. Another factor affecting of the turnover is the main commodity sold by the traders. Traders selling fresh and processed products have the higher opportunity to increase turnover compared to other commodities traders
Keyword: t-test., competition, ordinal logistic regression, turnover, performance, Bogor Agricultural University (IPB)

Judul: Dampak Kehadiran Pasar Ritel Modern terhadap Omzet Pedagang di Pasar Tradisional Kota Bandar Lampung
Abstrak: The aims of this study are to analyze competition and performance of the merchants in traditional market, factors affecting the turnover, and distance between modern retail market and traditional market to the turnover of traders in traditional markets in Bandar Lampung. This research used independent sample t test, chi square test, paired t test, and ordinal logistic regression method. Both of merchant performance have decreased from 2008 until 2013. Most of respondent stated that their competitors are not the existence of modern market but the other merchants in their group markets. Some factors including number of buyer, education, distance between traditional and modern market, and also fresh product significantly influence the turnover. Distance between modern market and traditional markethas reduced oppurtunties market treaders in traditional market to get higher turnover.
Keyword: turnover, paired t test, ordinal logistic regression, independent sample t test, chi square tes

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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