Judul: Analisis Brand Switching Produk Telkomsel dan Implikasinya Pada Bauran Produk Untuk Segmen Remaja Siswa SLTA di Bogor.
Abstrak: Brand switching which occured on phone card products is very high, this is the focus of the company in planning the appropriate product mix strategy in reaching the phone card market share. The purposes of this Research are ( 1 ) to identify the consumer perceptions and brand switching factors in using telkomsel phone card product (2) to analyze the brand switching level of Telkomsel phone card product, and (3) to recommend the development of Telkomsel phone card product mix. Based on the brand switching factors research, the descriptive statistical analysis result shows that the need of a strong signal is the main factor of brand switching and price is the driver factor of Telkomsel phone card product brand switching level. Analysis of brand switching pattern matrix shows that the brand switching level of Telkomsel phone card product is dominated by loyal consumers or not switching to other phone cards. Telkomsel is predicted to increase in market share based on the Markov Chains assumption.
Keyword: The Product Mix., Telkomsel, Brand Switching

Judul: Analisis Faktor-Faktor yang Mempengaruhi Brand Switching pada Telepon Seluler Merek Nokia
Abstrak: The significant decrease in Nokia’s market share and top brand index for five years indicates that the presence of Nokia’s customer who make the brand switching from Nokia’s celluler phone to celluler phone another brand. So it necessary to an analysis of the factors affecting of brand switching in Nokia cell phone. Exogenous variables used in the study is a product problems, service problems, the benefit / value of other products, variety seeking and switching cost. Questionnaires carried out on students of S1 regular Bogor Agricultural University (IPB), the number of respondents 100 people. Questionnaire results were processed used analytical tools Structural Equation Model (SEM) with SmartPLS software version 2.0. The results showed that brand switching in Nokia cell phone for students significant affected by variety seeking.
Keyword: variety seeking and switching cost, benefit/value other product, brand switching, Nokia cell phone

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.
Keyword: