Judul: Studi Komponen Aktif Temu Lawak terhadap Patogenesis Kanker Kolorektum Jalur Protein Induser dengan Penambatan Molekular
Abstrak: Colorectal cancer is caused by excessive amount of inducible NOS (iNOS) and cyclooxygenase-2 (COX-2) protein in the body. Temu lawak is a plant potential as anticancer. The molecular docking method can be used to determine the activity and efficiency of the temu lawak bioactive compounds, which can inhibit the colorectal cancer through inducer protein iNOS and COX-2 pathway. Based on the molecular docking results of 24 bioactive compounds of temu lawak against 16 proteins in iNOS and COX-2 pathways, the two most potencial anticancer compounds were obtained, demethoxycurcumin and dihydrocurcumin. Both compounds could inhibit colorectal cancer through γ-interferon protein in iNOS pathway and inhibit mitogen activated protein kinase in COX-2 pathway. The experimental parameters used were Gibbs free energy (ΔG), affinity (pKi), inhibition constant (Ki), efficiency, and hydrogen bonding. Based on those parameters, the demethoxycurcumin and dihydrocurcumin were more potencial than simvastatin and rosmaniric acid standards.
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Judul: Studi Komponen Aktif Temu Lawak terhadap Patogenesis Kanker Kolorektum Jalur Protein β-Katenin dengan Penambatan Molekular
Abstrak: Chemotherapy of colorectal cancer can be carried out by inhibiting the activity of excessive β-catenin protein in the body with anticancer compounds. One of the potential plants as anticancer is temu lawak (Curcuma xanthorrhiza). The molecular docking method can be used to determine the potential activity and efficiency of temu lawak bioactive compounds to inhibit the colorectal cancer through β-catenin protein pathway. The docking results of 24 active components in temu lawak against 14 proteins in β-catenin pathway obtained 3 potential bioactive anticancer compounds, namely dihydrocurcumin, demethoxycurcumin, and curcumin. The bioactive compounds could inhibit the colorectal cancer through the axin protein in β-catenin pathway. The interaction were observed based on several parameters: Gibbs free energy (ΔG), affinity (pKi), inhibition constant (Ki), efficiency, and hydrogen bonding. The results from the docking process were better compared with the XAV939 and IWR standards which have been known as inhibitors of colorectal cancer in axin protein.
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Judul: Pemanenan Energi Listrik dari Kincir Angin Vertikal
Abstrak: Usaha pemanenan energi angin di Indonesia masih sedikit. Sampai Tahun 2016 hanya 3.54 MW alat pemanenan energi angin yang sudah terpasang. Kendala utamanya ialah dibutuhkan investasi yang besar untuk membuatnya. Pembuatan kincir angin dengan ukuran yang lebih kecil dengan bahan yang dapat dibeli di pasar lokal menjadi solusi agar pembuatan kincir angin lebih ekonomis. Pembuatan kincir vertikal tipe Savonius dapat menjadi solusinya. Kincir vertikal Savonius dapat beroperasi pada kecepatan < 3 m/s dan ketinggian < 50 m. Kincir angin ini terdiri dari tiga sistem, yaitu generator, rotor kincir dan transmisi pulley-belt. Generator dibuat dari modifikasi motor AC dan magnet neodymium. Rotor kincir dibuat dari pipa PVC 4”, pipa alumunium ¾”, dan papan polikarbonat. Transmisi pulley-belt dibuat dari plastik dan karet. Kincir ini membutuhkan gaya minimal 3 N untuk dapat berputar atau torsi minimalnya 0.75 Nm. Kecepatan angin yang dibutuhkan untuk merotasikannya sebesar 1.9 m/s. Daya maksimal yang dapat dihasilkan ialah 5.76 watt berupa tegangan sebesar 36 volt dan arus 160 mA.
Keyword: energi terbarukan, generator, motor AC, sudu Savonius