Judul: Faktor-Faktor Bauran Pemasaran yang Memengaruhi Keputusan Pembelian di Bukalapak
Abstrak: Rata-rata pertumbuhan nilai e-commerce Indonesia dari tahun 2017 hingga 2019 mencapai 62%. Merchant Machine (2019) menjelaskan bahwa pertumbuhan e-commerce di Indonesia tergolong tinggi. Kondisi tersebut dapat dilihat dipeta persaingan marketplace di Indonesia, seperti Bukalapak, Shopee, dan Tokopedia sebagai tiga marketplace teratas di Indonesia. Iprice (2020) menjelaskan bahwa Bukalapak mengalami penurunan jumlah pengunjung paling signifikan pada tahun 2019, tepatnya sebesar 26%. Kotler et al. (1999) dan Proctor (2000) menjelaskan bahwa organisasi memerlukan strategi pemasaran untuk bertahan di arena yang kompetitif. Strategi pemasaran adalah kombinasi semua atau sebagian faktor-faktor bauran pemasaran, yaitu produk, harga, tempat, dan promosi yang memenuhi kebutuhan konsumen. Kebutuhan dapat dipenuhi melalui pembelian. Pembelian adalah bagian dari proses keputusan konsumen. Penelitian terdahulu menjelaskan bahwa keputusan konsumen dipengaruhi oleh faktor-faktor bauran pemasaran, di antaranya adalah merek populer, harga murah, promosi menarik, dan toko terjangkau. Keputusan konsumen juga melibatkan proses persepsi. Konsumen perlu menerima, mengorganisir, dan menginterpretasikan stimulus seperti iklan, kemasan produk, dan komersial televisi dalam membuat keputusan. Penelitian ini bertujuan menganalisis persepsi konsumen terhadap bauran pemasaran dan keputusan pembelian di Bukalapak, menganalisis faktor- faktor bauran pemasaran yang memengaruhi keputusan pembelian di Bukalapak, dan memformulasikan strategi pemasaran untuk menahan penurunan jumlah pengunjung Bukalapak. Data penelitian dianalisis menggunakan Structural Equation Modeling (SEM) pada Lisrel 8.70 dan disajikan secara deskriptif. Hasil penelitian menunjukkan bahwa persepsi konsumen terhadap bauran pemasaran dan keputusan pembelian di Bukalapak adalah produk di Bukalapak lebih utama dalam hal kualitas dan fitur daripada merek. Harga di Bukalapak bernilai wajar dan kompetitif, meskipun tidak begitu murah. Bukalapak adalah marketplace yang mampu melayani pembayaran melalui metode yang beranekaragam, memiliki fitur pencarian produk yang dapat memermudah proses pencarian kebutuhan, dan dapat diakses 24 jam khususnya melalui aplikasi seluler. Bukalapak juga menawarkan berbagai promosi menarik, namun yang paling menarik bagi konsumen adalah diskon biaya pengiriman. Faktor-faktor bauran pemasaran yang memengaruhi keputusan pembelian di Bukalapak adalah tempat dan harga. Strategi pemasaran yang direkomendasikan untuk menahan penurunan jumlah pengunjung Bukalapak adalah menambah variasi harga di Bukalapak dan mengoptimalkan kecepatan aplikasi seluler.
Keyword: bukalapak, keputusan pembelian, SEM, strategi pemasaran, marketing strategy, purchase decision

Judul: Pengaruh Persepsi Harga, Kualitas Layanan, Citra Merek, dan Kepercayaan terhadap Keputusan Pembelian di Bukalapak
Abstrak: Consumer purchasing decisions are actions taken by consumers in buying goods or services. This study aims to identify the characteristics of Bukalapak consumers and examine the effect of price, service quality, brand image, and trust on decision purchase. Structural Equation Modeling (SEM) with approach Partial Least Square (PLS) is the method use. The findings of the study indicate that the brand image and trust variables, respectively, is the emotional relationship between Bukalapak and Bukalapak brands who have good intentions to provide satisfaction to consumers. Meanwhile, the variables of price and service quality do not have a significant effect on purchasing decisions., Consumer purchasing decisions are actions taken by consumers in buying goods or services. This study aims to identify the characteristics of Bukalapak consumers and examine the effect of price, service quality, brand image, and trust on decision purchase. Structural Equation Modeling (SEM) with approach Partial Least Square (PLS) is the method use. The findings of the study indicate that the brand image and trust variables, respectively, is the emotional relationship between Bukalapak and Bukalapak brands who have good intentions to provide satisfaction to consumers. Meanwhile, the variables of price and service quality do not have a significant effect on purchasing decisions.
Keyword: consumer perception, purchasing decisions, e-marketplace, SEM-PLS

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: