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: Short chain fatty acid (SCFA) profile produced by Clostridium butyricum grown on medium containing type 3 resistant starch (RS3) of sweet potato
Abstrak: Gastrointestines is an important part of body metabolism which affects human health. One of the deseases which attack gastrointestines is colorectal cancer (CRC) which can be prevented by proper lifestyle and consumption of healthy functional food. SCFA are the main products of anaerobic microbial fermentation in the large intestine and affect colonic health by providing energy to the epithelial cells. The organic acids produced in the colon are acetic acid, propionic acid, and butyric acid. Interest in butyrate role as a possible protective agent has arisen from its anti-proliferative effects on cells in vitro including colon tumour cell lines. Resistant starch (RS), is retrogradaded starch that escapes digestion in the small intestine and can be fermented in colon by anaerobic bacteria producing SCFA which contributes to the gastrointestinal health, and thus can be classified as funtional food. The crystalline non-granular starch (RS3) can be obtained from many starchy sources, such as rice, corn, maize, wheat, sago, banana, potato, and sweet potato. In this study, jago sweet potato used contain 31% starch content. Jago sweet potato is usually consumed indirectly as the taste is not preferable.
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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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