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"Penelitian ini bertujuan untuk mengeksplorasi penggunaan Instagram dan motivasi konsumen dalam proses pengambilan keputusan konsumen mengonsumsi pakaian bekas oleh mahasiswa di Jakarta. Penelitian ini menggunakan paradigma post-positivisme dengan pendekatan kualitatif dan strategi fenomenologi. Hasil penelitian menunjukkan bahwa penggunaan Instagram, mencakup durasi, frekuensi, aspek visual, fitur-fitur Instagram, algoritma Instagram, dan motivasi penggunaan media sosial menghasilkan perilaku penggunaan media sosial mahasiswa yang membuatnya terpapar dengan informasi terkait online shop pakaian bekas. Hal tersebut memunculkan motivasi konsumen untuk mengonsumsi pakaian bekas. Motivasi ekonomi merupakan motivasi utama mahasiswa di Jakarta mengonsumsi pakaian bekas karena harganya yang murah. Selain itu, terdapat pula motivasi lainnya, seperti motivasi fesyen, motivasi rekreasional, dan motivasi kritis. Dengan demikain, perilaku penggunaan media sosial mahasiswa, dalam hal ini penggunaan Instagram dan motivasi konsumsi pakaian bekas berperan menjadi penentu dalam setiap tahapan proses pengambilan keputusan mengonsumsi pakaian bekas.

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This study aims to explore the use of Instagram and consumer motivation in shaping consumer decision making process to consume second-hand clothes for university students in Jakarta. A post-positivism paradigm with qualitative approach and phenomenology strategy were used to conduct this study. The result shows that the use of Instagram, including duration, frequency, visual aspect, Instagram features, Instagram algorithm, and the motivation in using social media creates social media usage behavior of university students that leads them to get exposed with information related to online shop that sell second-hand clothes. Thus, it generates consumer motivation to consume second-hand clothes. Economic motivation is the main consumer motivation in consuming second-hand clothes for university students in Jakarta because the price is affordable. Other than that, there are also other motivations, such as fashion motivation, recreational motivation, and critical motivation. To conclude it all, social media usage behavior of university students, which is the use of Instagram and their motivation in consuming second-hand clothes play a crucial role in every stages of consumer decision making process in consuming second hand clothes."

"Penelitian ini bertujuan untuk mensintesis ester sukrosa dari asam lemak hasil hidrolisis minyak kelapa sawit dengan sukrosa menggunakan lipase Candida rugosa EC 3.1.1.3. Lipase yang digunakan diimobilisasi secara adsorbsi pada matriks silka gel 60. Proses imobilisasi menggunakan tris buffer HCl 0,1M pH 7, waktu adsorbsi 3 jam, dan variasi silika gel sebanyak 100, 250, 500, 750, dan 1000 mg. Nilai % loading ditentukan dengan metode Lowry. Hasil pengujian efisiensi lipase terimobilisasi melalui reaksi hidrolisis minyak sawit dengan nilai efisiensi imobilisasi mencapai 80,59% untuk jumlah silika gel sebanyak 500 mg. Reaksi esterifikasi optimum pada, suhu37oC, perbandingan rasio sukrosa:asam lemak 1:80, dan waktu reaksi 8 jam. Nilai % konversi asam lemak pada keadaan optimum sebesar 2,90%. Penggunaan molecular sieve yang bertujuan meningkatkan % konversi memberikan dampak penurunan % konversi.

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The aim of this study is to synthesize sucrose ester from fatty acid obtained from hydrolyzed palm oil and sucrose using Candida rugosa lipase EC 3.1.1.3. Lipase was immobilized in matrix silica gel 60. Immobilization was carried out in condition at pH 7 using Tris buffer HCl 0.1M, for 3 hours, and varying the amount of matrix 100, 250, 500, 750, and 1000 mg. % loading was determined by Lowry method.

The results of determining the efficiency of immobilized lipase reached 80.59% with a total amount of silica gel 500 mg. The optimum conditions for esterification are at 37oC, ratio sucrose : fatty acid 1:80, and for 8 hours incubation.. The highest % conversion in this condition reached 2,90%. The addition of molecular sieve, which aims to increase the % conversion, lead to lowered % conversion."