Unfermented recalcitrant polysaccharide structures from rapeseed (Brassica napus) meal in pigs

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Unprocessed and acid-extruded rapeseed meal (RSM) was fed to pigs as the only source of non-starch polysaccharides (NSP) and protein. Unfermented carbohydrate structures were analyzed. Acid-extrusion seemed to increase rigidness of the NSP-matrix in vivo, without affecting NSP-fermentability. Water-soluble NSP were almost completely fermented in the colon. From the water-insoluble unfermented carbohydrates 46–68% (w/w) was analyzed as the polysaccharides rhamnogalacturonan, (branched) arabinan, XXXG-type xyloglucan, linear xylan, galactomannan, and cellulose. A major fraction (35–54% w/w) of the unfermented carbohydrates was unexpectedly released as small uronyl-rich carbohydrates (
Original languageEnglish
Pages (from-to)271-279
JournalIndustrial Crops and Products
Publication statusPublished - 2014


  • cell-wall polysaccharides
  • nonstarch polysaccharides
  • canola-meal
  • growing pigs
  • poultry
  • digestibility
  • xyloglucan
  • enzyme
  • oligosaccharides
  • microbiome


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