In vitro fermentation characterization of low concentration of xylooligosaccharides prepared from corncob xylan by Bifidobacterium adolescentis
首发时间:2009-01-15
Abstract:In vitro fermentation characterization of low concentration of XOS by Bifidobacterium adolescentis was investigated. Cell growth, decrease in pH value and formation of organic acids were presented when XOS, glucose and arabinose were used as the sole carbon source respectively. The maximal biomasses were 0.43, 0.52 and 0.16 g L-1 when B. adolescentis fermented on 3 g L-1 XOS, glucose and arabinose respectively. It was deduced that XOS had better proliferation capability of B. adolescentis than arabinose, but less than glucose. When XOS were fermentated by B. adolescentis, X2 and X3 decreased rapidly and the pH value of the medium dropped rapidly after 18 h of fermentation due to the production of organic acids. Lactic and acetic acids were the main metabolites. Our result confirmed that low concentration XOS also had good prebiotic effects including proliferation capability of B. adolescentis and acidification ability to culture media.
keywords: Xylooligosaccharide Bifidobacteria Prebiotic effect Organic acids
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