Judul: Analisis Sikap Konsumen Sim Card Telepon Genggam di Kota Bogor
Abstrak: Industri operator jasa telekomunikasi telepon genggam kian marak. Para operator baru banyak bermunculan. Hal ini membuat persaingan dalam industri yang pertumbuhannya lebih dari 200% pertahun ini semakin ketat. Para operator berusaha untuk menarik hati para pengguna telepon genggam dengan menonjolkan atribut-atribut yang dimilikinya. Kondisi persaingan dalam industri telekomunikasi ini tentunya berdampak pada perilaku konsumen masyarakat terhadap jasa operator telepon genggam. Para pengguna telepon genggam tersebut dihadapkan pada banyak pilihan fasilitas dan fitur-fitur yang disediakan oleh beberapa penyedia layanan telekomunikasi.
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Judul: Analisis Perilaku Konsumen Dalam Proses Keputusan Pembelian Telepon Selular (Kasus Mahasiswa Institut Pertanian Bogor)
Abstrak: Perkembangan telekomunikasi di Indonesia yang sangat pesat telah mengisyaratkan adanya beberapa permasalahan menarik untuk dianalisa. Persoalan inipun menjadi lebih menarik apabila kita melihat bagaimana perangkat dan jasa komunikasi yang sekarang tersedia di masyarakat memberikan sebuah perspektif lain, dimana komunikasi menjadi sebuah komoditas yang setara dengan komoditas pokok lainnya. Adanya perubahan perilaku sebagian besar masyarakat Indonesia dalam berkomunikasi merupakan suatu peluang yang prospektif bagi produsen penghasil telepon selular untuk memasarkan produknya. Oleh karena itu, pemasar perlu memahami faktor-faktor yang mempengaruhi perilaku konsumen dalam proses keputusan pembelian telepon selular.
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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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