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In vitro fermentability of xylo-oligosaccharide and xylo-polysaccharide fractions with different molecular weights by human faecal bacteria

Ho, A. L., Kosik, O., Lovegrove, A., Charalampopoulos, D. and Rastall, R. A. (2018) In vitro fermentability of xylo-oligosaccharide and xylo-polysaccharide fractions with different molecular weights by human faecal bacteria. Carbohydrate Polymers, 179. pp. 50-58. ISSN 0144-8617

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To link to this item DOI: 10.1016/j.carbpol.2017.08.077

Abstract/Summary

Xylo-oligosaccharides and xylo-polysaccharides (XOS, XPS) produced by autohydrolysis of the fibre from oil palm empty fruit bunches (OPEFB) were purified using gel filtration chromatography to separate the XOS and XPS from the crude autohydrolysis liquor. Six mixed fractions of refined XOS and XPS with average degree of polymerisation (avDP) of 4-64 were obtained. These were characterised in terms of their composition and size by HPLC, MALDI-ToF-MS (selected fractions) and carbohydrate gel electrophoresis (PACE). They were assessed in batch culture fermentations using faecal inocula to determine their ability to modulate the human faecal microbiota in vitro by measuring the bacterial growth, organic acid production and the XOS assimilation profile. The gut microbiota was able to utilise all the substrates and there was a link between the XOS/XPS degree of polymerisation with the fermentation properties. In general, XOS/XPS preparations of lower avDP promote better Bifidobacterium growth and organic acid production.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Food and Nutritional Sciences > Food Research Group
ID Code:73126
Uncontrolled Keywords:Autohydrolysis; in vitro fermentation; Oil palm empty fruit bunches; Xylo-oligo and xylo-polysaccharides
Publisher:Elsevier

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