In vitro fermentation characterization of low concentration of xylooligosaccharides prepared from corncob xylan by Bifidobacterium adolescentis

Zhang Junhua; Zhang XiaoPing; Yong Qiang; Xu Yong; Yu Shiyuan

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In vitro fermentation characterization of low concentration of xylooligosaccharides prepared from corncob xylan by Bifidobacterium adolescentis

Zhang Junhua * #,Zhang XiaoPing,Yong Qiang ,Xu Yong ,Yu Shiyuan

College of Forestry, Northwest A&F University, Yangling

*Correspondence author

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Funding: 教育部博士点基金，国家自然科学基金（No.20050298010, (30471361, 30700631)）

Opened online:15 January 2009

Accepted by: none

Citation: Zhang Junhua,Zhang XiaoPing,Yong Qiang .In vitro fermentation characterization of low concentration of xylooligosaccharides prepared from corncob xylan by Bifidobacterium adolescentis[OL]. [15 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27910

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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