Judul: Psychological Well-Being and Impulsive Buying: The Role of  Social Support, Self-Esteem, and Instagram Usage Intensity through  Social Comparison
Abstrak: Tingginya penggunaan media sosial memiliki faktor penyebab dan dampak. Salah satu media sosial yang paling banyak digunakan adalah Instagram. Salah satu faktor penyebab penggunaan Instagram adalah harga diri dan dukungan sosial dapat memicu terjadinya perbandingan sosial yang berdampak pada kesejahteraan psikologis dan perilaku pembelian impulsif. Penelitian ini bertujuan untuk menganalisis pengaruh dukungan sosial, harga diri, intensitas penggunaan Instagram terhadap kesejahteraan psikologis dan pembelian impulsif melalui perbandingan sosial. Penelitian ini menggunakan desain penelitian eksplanatori dengan teknik pengambilan sampel secara sukarela. Penelitian ini memiliki 222 responden dengan kriteria individu adalah pengguna Instagram yang berusia 18-24 tahun dan berdomisili di Indonesia. Analisis data yang dilakukan berupa analisis deskriptif, uji hubungan, dan uji pengaruh SEM dengan menggunakan aplikasi SPSS 25.0 dan Lisrel. Hasil penelitian menunjukkan bahwa dukungan sosial memiliki pengaruh terhadap intensitas penggunaan Instagram. Kemudian terdapat pengaruh langsung dan tidak langsung intensitas penggunaan Instagram terhadap pembelian impulsif. Dengan memiliki kontrol diri diharapkan mampu mengatasi penggunaan Instagram yang memberikan dampak negatif seperti impulsive buying.
Keyword: impulsive buying, Instagram, self-esteem, social comparison, social support

Judul: Faktor-Faktor yang Memengaruhi Impulse Buying di Media Sosial pada Generasi Millennial (Studi Kasus Belanja Online di Facebook dan Instagram).
Abstrak: Bisnis toko online di media sosial berpotensi untuk meningkatkan penjualan. Para pebisnis toko online di media sosial harus mengetahui perilaku konsumen agar mampu bersaing dengan pasar yang semakin kompetitif. Tujuan penelitian ini untuk mengidentifikasi karakteristik konsumen dan faktor-faktor yang memengaruhi impulse buying di media sosial pada generasi millennial. Penelitian ini menggunakan data sekunder dan data primer. Data primer diperoleh dari kuesioner yang diisi secara online oleh konsumen generasi millennial berusia 18-30 tahun dan pernah melakukan pembelian tidak terencana produk fashion di media sosial (Facebook dan Instagram). Metode analisis yang digunakan yaitu analisis deskriptif dan analisis structure equation modeling (SEM) dengan bantuan program AMOS versi 24. Hasil penelitian menunjukkan faktor-faktor yang berpengaruh terhadap impulse buying di media sosial pada generasi millenial yaitu hedonic shopping motives, fashion involvement, dan presence of others. Sedangkan faktor-faktor yang tidak berpengaruh yaitu time availability dan money availability.
Keyword: belanja online, media sosial, pembelian tidak terencana, SEM-AMOS

Judul: Development of DNA Vaccine Encoding Glycoprotein of Koi Herpes Virus Using Local Isolate.
Abstrak: The aim of this research was to develop DNA vaccine of Koi Herpesvirus in carp. Glycoprotein gene originated from ORF 25 KHV virus that is 1.8 kbp in size, is a potential gene in DNA vaccine construction. The sequencing and similarity analysis of the gene using BLAST software showed that this gene is a GP25 gene and was found to be very similar (99%) to GP25 of KHV virus from the USA and Israel. When this GP25 gene was ligated with pGEMT Easy (pT, 3 kbp in size) vector, plasmid size was increasing up to 5 kb. Following this, a digestion of pT-GP25 plasmid using Sal I enzyme was applied resulted in a GP25 fragment (1.8 kbp). Subsequently, pAct-D6 with a size of 8.5 kbp was also cut using the same enzyme to eleminate a D6 gene with a size of 1.6 kbp. GP25 gene was then ligated with pAct resulted a pAct-GP25 plasmid with a size of 8.8 kbp. As there was only one restriction site applied, ligation can be occurred in two different directions. Thus, in order to determine the plasmid with the desired direction PCR analysis was carried out, and plasmid with the right direction was the one that sized approximately 2.1 kbp (no. 6, 17 and 20). High level of GFP gene expression was detected in all tissues analyzed, i.e. kidney, gil, spleen, and muscle 24 hours after injection which indicated that β-actin promoter of Japanese medaka could be active in common carp. Although not as high as on 24 hours, expression was still detected until day 7 and disappeared after day 28 post injection indicating that pAct-GFP can be remained and β-actin promoter of Japanese medaka can be active in muscle, gills and kidney at least a week after injection. The result of RT-PCR analysis on pAct-GP25 injected common carp showed that GP25 gene expression can be detected 14 days after injection in all tissues observed. The expression level differences between GFP and GP25 genes possibly related to the primer sensitivity on annealing process to cDNA template and the size of PCR targeted DNA fragment, as smaller PCR targeted product will be easier to be amplified than a bigger one. The length of PCR targeted DNA with GP25 primer was 1.8 kbp whereas GFP gene was 0.6 kbp.The challenge test on common carp results showed that all unvaccinated and negative control (not infected with KHV) was alive until the end of the experiment. Whereas, the survival of fish vaccinated with a dose of 12.5 was ranged from 60.9 and 96.7%. In relation to the activity of β-actin promoter that was used in this DNA vaccine, gene expression was occured 24 hours after vaccination and remained until 2 weeks. The control fish that was not injected by GP25 showed no GP25 expression either in the observed tissues or organs and resulted in a lower survival, i.e. 23.3%. The challenge test results has indicated that the fish vaccinated with GP25 at doses of 7.5 and 12.5 μg/100μL were able to produce KHV glycoprotein in their body which would be
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