Judul: Pengaruh Gamification terhadap Customer Engagement dan Customer Retention pada Pengguna Shopee di Jabodetabek
Abstrak: Pengguna smartphone dan internet di Indonesia yang terus mengalami peningkatan memicu persaingan e-commerce di Indonesia yang semakin ketat. Shopee sebagai salah satu e-commerce di Indonesia mampu bertahan ditengah persaingan e-commerce di Indonesia dengan berusaha membentuk customer retention. Tujuan dari penelitian ini adalah untuk (1) mengetahui karakteristik pengguna Shopee, (2) menganalisis pengaruh gamification terhadap customer engagement dan customer retention pada pengguna Shopee, (3) meganalisis pengaruh customer engagement terhadap customer retention pada pengguna Shopee. Penarikan sampel menggunakan nonprobability sampling yaitu purposive sampling dan quota sampling dengan jumlah reponden 183 dan diolah menggunakan analisis deskriptif dan Structural Equation Modelling-Partial Least Square (SEM-PLS). Hasil penelitian menunjukkan gamification berpengaruh positif dan signifikan terhadap customer engagement dan customer retention serta customer engagement berpengaruh positif dan signifikan terhadap customer retention.
Keyword: customer engagement, customer retention, e-commerce, gamification

Judul: Pengaruh Rating dan Online Customer Review Terhadap Keputusan Pembelian di E-commerce Shopee
Abstrak: Kemajuan teknologi informasi menimbulkan adanya E-commerce yang membuat aktivitas belanja menjadi semakin mudah. Berdasarkan jumlah pengunjung bulanan situs E-commerce pada kuartal IV 2020, Shopee merupakan E-commerce yang paling banyak dikunjungi oleh pengguna internet. Penelitian ini bertujuan menganalisis pengaruh rating dan online customer review terhadap keputusan pembelian di E-commerce Shopee. Sumber data menggunakan data primer yang diperoleh berdasarkan hasil pengisian kuesioner oleh responden dan data sekunder yang diperoleh melalui literasi jurnal ilmiah, buku, dan sumber bacaan lainnya. Penelitian ini dilaksanakan pada bulan juni 2022. Responden pada penelitian ini adalah mahasiswa Institut Pertanian Bogor. Teknik data yang digunakan yaitu uji validitas dan uji reliabilitas dengan metode pengolahan data yang digunakan yaitu analisis deskriptif dan SEM-PLS. Hasil penelitian menjelaskan bahwa Variabel rating berpengaruh secara positif dan signifikan terhadap variabel keputusan pembelian dan variabel customer online review berpengaruh secara positif dan signifikan terhadap keputusan pembelian., Advances in information technology have given rise to E-commerce which makes shopping activities easier. Based on the number of monthly visitors to E-commerce sites in the fourth quarter of 2020, Shopee is the most visited E-commerce by internet users. This study aims to analyze the effect of ratings and online customer reviews on purchasing decisions at E-commerce Shopee. Data sources use primary data obtained based on the results of filling out questionnaires by respondents and secondary data obtained through literacy in scientific journals, books and other reading sources. This research was conducted in June 2022. Respondents in this study were students of the Bogor Agricultural University. The data technique used is the validity test and reliability test with the data processing method used is descriptive analysis and SEM-PLS. The results of the study explain that the rating variable has a positive and significant effect on the purchasing decision variable and the online customer review variable has a positive and significant effect on the purchasing decision. Keywords: E-commerce, Online Customer Review, Rating, Purchase Decision, SEM-PLS
Keyword: E-commerce, Online Customer Review, Rating, Purchase Decision, SEM-Pls

Judul: Isolasi dan pemurnian bahan aktif dari mikroalga BTM 11 sebagai inhibitor RNA helikase virus hepatitis C
Abstrak: Hepatitis C virus is the cause of hepatitis C disease which has high virulence. Recent therapy using combination of ribavirin and alpha interferon has short efficiency < 80%. Thus, the discovery of new drug is needed. Antiviral drugs can be discovered through molecular target therapy by finding the inhibitor of RNA helicase that play role in viral replication. Inhibitor can be derived from chemical compound produced by microalgae. The aim of this research was to isolate the active compound from microalgae BTM 11 which had inhibitory activity against RNA helicase. Inhibitory activity was measured by releasing of phospate inorganic in colorimetric ATPase assay. Crude extract was fractionated using gel filtration chromatography with methanol in chloroform solvent. The result showed that Fraction 3 has the highest inhibitory activity which (81.205%). Phytochemical test of crude extract indicated positive flavonoids and coumarin. Thin layer chromatography (TLC) analysis with eluent chloroform: methanol gave 2 spots with Rf value of 0.8 and 0.37. Moreover, high performance liquid chromatography (HPLC) analysis showed absorption peak with the highest abundance at the retention time of 12.483 minute and 16.617 minute was 266 nm and 230 nm. According to these of phytochemical, TLC, and HPLC, inhibitor compound from BTM 11 belongs to flavonoids.
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