Judul: Comparison of the Influence of Social Interaction and Online Trust on Purchase Intention in Social Commerce TikTok Shop and Instagram Shop
Abstrak: Globalisasi dan kemajuan teknologi menyebabkan pergeseran pola perilaku berbelanja dan berinteraksi masyarakat di Indonesia. Konsep social commerce hadir sebagai inovasi yang menggabungkan kegiatan berinteraksi dan berbelanja dalam satu tempat yang sama. Tiktok Shop dan Instagram Shop sebagai platform social commerce yang memiliki peran besar dalam industri social commerce perlu untuk meninjau keefektifan preferensi minat beli masyarakat. Penelitian ini bertujuan untuk mengkomparasi pengaruh social interaction dan online trust terhadap purchase intention pada Tiktok Shop dan Instagram Shop di Jabodetabek. Data dalam penelitian ini diperoleh melalui data primer. Analisis data yang digunakan adalah analisis deskriptif, analisis Wilcoxon Test, dan analisis SEM-PLS dengan sampel sebanyak 196 responden dengan teknik pengambilan sampel non probability sampling jenis purposive sampling. Hasil penelitian menunjukkan bahwa terdapat pengaruh social interaction dan online trust terhadap purchase intention secara positif dan signifikan serta terdapat pengaruh social interaction terhadap online trust secara positif dan signifikan. Juga ditemukan bahwa pengaruh online trust terhadap purchase intention pada Tiktok Shop lebih tinggi dibandingkan Instagram Shop sedangkan pengaruh social interaction terhadap purchase intention pada Tiktok Shop lebih rendah dibandingkan Instagram Shop., Globalization and technological advancements have led to a shift in shopping and interaction behavior patterns among Indonesian society. The concept of social commerce emerges as an innovation that combines interaction and shopping activities in one place. TikTok Shop and Instagram Shop, as prominent social commerce platforms, play a significant role in the industry and need to assess the effectiveness of consumer purchase intention preferences. This study aims to compare the influence of social interaction and online trust on purchase intention in TikTok Shop and Instagram Shop within the Greater Jakarta area. Data for this research were collected from primary sources. The data analysis employed descriptive analysis, Wilcoxon Test, and Structural Equation Modeling-Partial Least Squares (SEM-PLS) with a sample of 196 respondents, utilizing non-probability purposive sampling. The research findings indicate a positive and significant impact of social interaction and online trust on purchase intention, as well as a positive and significant impact of social interaction on online trust. Furthermore, it was found that the influence of online trust on purchase intention in Tiktok Shop is higher compared to Instagram Shop, while the influence of social interaction on purchase intention in Tiktok Shop is lower compared to Instagram Shop.
Keyword: social commerce, online trust, purchase intention, social interaction

Judul: Analisis Live Streaming Shopping TikTok terhadap Customer Trust dan Customer Engagement serta Dampaknya pada Purchase Intention
Abstrak: Pandemi Covid-19 menyebabkan pengguna media sosial di Indonesia meningkat. Adanya peningkatan pengguna media sosial menjadikan peluang bagi pelaku usaha untuk memasarkan bisnisnya. TikTok Shop merupakan salah satu scommerce yang memudahkan para penggunanya untuk berbelanja pada aplikasi tersebut tanpa harus berganti aplikasi. Salah satu fitur yang dimiliki TikTok Shop adalah Live Streaming. Konsumen masih belum sepenuhnya percaya dengan toko online karena maraknya kasus penipuan. Oleh karena itu, penelitian ini bertujuan untuk menganalisis live streaming shopping terhadap customer trust, customer engagement, dan purchase intention terhadap masyarakat Indonesia. Metode pengambilan sampel menggunakan purposive sampling yang melibatkan 647 responden. Pengolahan data pada penelitian ini menggunakan SEM-PLS. Hasil yang didapatkan adalah live streaming shopping memiliki pengaruh positif signifikan terhadap customer trust, customer engagement, dan purchase intention.
Keyword: customer engagement, customer trust, live streaming shopping, purchase intention

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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