Judul: Scfa Profile Of Rice Rs Fermentation By Colonic Microbiota, Clostridium Butyricum Bcc B2571, Or Eubacterium Rectale Dsm 17629
Abstrak: Pati resisten tipe 3 (RS3) yang dihasilkan dari berbagai sumber makanan beramilosa tinggi melalui retrogradation atau proses enzimatik dikenal memiliki fungsi fisiologis sebagai serat makanan. Fermentasi RS3 oleh mikrobiota kolon menghasilkan SCFA (asetat, propionat, dan butirat), yang dapat menjaga kesehatan usus, keseimbangan usus mikrobiota, mencegah penyakit radang usus IBD) dan kanker kolon. RS3 dalam penelitian ini dibuat dari beras patah IR-42 dan Inpari-16 melalui perlakuan enzimatik (kombinasi amilase-pullulanase). Pati resisten difermentasi selama 12 dan 24 jam dengan mikrobiota kolon, Clostiridium butyricum BCC-B2571, atau Eubacterium rectale DSM 17629. SCFA yang dihasilkan dianalisis dengan kromatografi gas. Hasil penelitian menunjukkan bahwa setelah proses enzimatik, kadar RS3 dari IR-42 (41,13%) tidak berbeda nyata (p <0,05) dari yang Inpari-16 (37,70%). Perlakuan dengan kombinasi amilase-pullulanase sangat menguntungkan untuk meningkatkan kadar RS3. Hasil penelitian menunjukkan bahwa konsentrasi tinggi asetat (82,5 mM) diproduksi oleh mikrobiota kolon setelah 12 jam fermentasi. Kadar propionat terbaik (7,5 mM) juga diproduksi oleh mikrobiota kolon setelah 12 jam fermentasi dan konsentrasi terbaik dari butirat (6,8 mM) diproduksi oleh mikrobiota kolon setelah 24 jam fermentasi. Hal ini jelas bahwa produksi SCFA lebih baik pada mikrobiota kolon dan bukan satu strain.
Keyword: Pati resisten, mikrobiota kolon, Clostridium butyricum BCC-B2571, Eubacterium rectale DSM 17629, SCFA

Judul: Skripsi:Fermentasi Pati Resisten pada Tahu Koro OlehClostridium butyricumBCC B2571 dan Eubacterium rectaleDSM 17629
Abstrak: Resistant starch is a starch fraction which is not digested by human starch degrading enzyme and would be fermented by bacterial in the colon to produce short chain fatty acid (SCFA). Fermentation productsdependon the type of substrate and microbes available. This research was aimedto analyze the profile of SCFA produced from resistant starch in Canavalia ensiformisbean curd fermented by Clostridium butyricumBCC B2571 and Eubacterium rectaleDSM 17629. The fermentation was held in 36 hours with C. ensiformisbean curd that contain 16.04- 17.94% of resistant starch and compared to hi maize starch. The results showed similiar pattern of SCFA production from the different substrate and bacteria used. The highest production with C.butyricumoccured at 36 hours fermentation with concentration of acetate, propionate, and butyrate were 51.59, 35.57, 22.05 mM. At the same time, E.rectale was produce the highest concentration of acetate, propionate, and butyrate were 49.70, 34.77, 24.68 mM.
Keyword: Bogor Agricultural University (IPB), short chain fatty acid, resistant starch, Eubacterium rectal, Clostridium butyricum

Judul: Penggunaan Metode Homotopi untuk Menyelesaikan Persamaan KdV (Korteweg-de Vries)
Abstrak: Natural phenomena can be explained using nonlinear mathematical models. In this paper, we studied the solution of KdV equation using the Homotopy method. The KdV equation is used for describing both surface and internal waves. One of the solutions is called a solitary wave. The use of homotopy method to solve the KdV equation required a nonlinear operator which was determined by the nonlinear form of the KdV equation itself. Based on this operator, a recursive formula was obtained to get a sequence of the KdV solution. The higher the sequence order of the sequence used, the closer to the exact solution of the KdV equation.
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