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Fermentation of dietary fibre components in the rat intestinal tract.
Br J Nutr. 1982 May; 47(3):357-66.BJ

Abstract

1. The fermentative breakdown of dietary fibre from various sources in the intestinal tract was studied using rat balance experiments and gas-liquid chromatograhic analysis of dietary fibre monomers in feed and faces. 2. On a basal diet with 690 g maize starch/kg but no added fibre, small but detectable amounts of polymeric glucose, rhamnose, arabinose, xylose, galactose, mannose and uronic acids, i.e. sugars occurring in dietary fibre, were excreted in faeces. 3. Dietary fibre in wheat bran was rather resistant to fermentation; 63% was recovered in the faeces. Guar gum, on the other hand, was almost completely fermented, whereas 19 and 25% of the uronic acids in low and high methoxylated pectin respectively, were excreted in faeces. The various constituents of sugar-beet dietary fibre (approximately equal amounts of arabinose-based hemicellulose, pectin and non-starch glucan (cellulose)) showed quite variable availability for micro-organisms in that 6-12% of the arabinose, 17-25% of the uronic acids, and 52-58% of the cellulose were recovered in the faeces. 4. Faecal nitrogen excretion increased on addition of any one of the dietary fibre preparations studied, resulting in decreased true and apparent protein digestibility values. 5. The faecal dry weight increment was most pronounced when feeding bran and could then almost be accounted for by the remaining fibre and by protein. The less-prominent bulking effect of guar gum and pectins, that were much more extensively fermented, could be only partly explained by dietary fibre and protein.

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Publisher Full Text

Authors

Nyman M
No affiliation info available
Asp NG
No affiliation info available

MeSH

AnimalsCarbohydratesDietary FiberDietary ProteinsFecesFermentationGalactansIntestinal MucosaMaleMannansPectinsPlant GumsRatsRats, Inbred StrainsTriticum

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

6282300

Citation

Nyman, M, and N G. Asp. "Fermentation of Dietary Fibre Components in the Rat Intestinal Tract." The British Journal of Nutrition, vol. 47, no. 3, 1982, pp. 357-66.
Nyman M, Asp NG. Fermentation of dietary fibre components in the rat intestinal tract. Br J Nutr. 1982;47(3):357-66.
Nyman, M., & Asp, N. G. (1982). Fermentation of dietary fibre components in the rat intestinal tract. The British Journal of Nutrition, 47(3), 357-66.
Nyman M, Asp NG. Fermentation of Dietary Fibre Components in the Rat Intestinal Tract. Br J Nutr. 1982;47(3):357-66. PubMed PMID: 6282300.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fermentation of dietary fibre components in the rat intestinal tract. AU - Nyman,M, AU - Asp,N G, PY - 1982/5/1/pubmed PY - 1982/5/1/medline PY - 1982/5/1/entrez SP - 357 EP - 66 JF - The British journal of nutrition JO - Br J Nutr VL - 47 IS - 3 N2 - 1. The fermentative breakdown of dietary fibre from various sources in the intestinal tract was studied using rat balance experiments and gas-liquid chromatograhic analysis of dietary fibre monomers in feed and faces. 2. On a basal diet with 690 g maize starch/kg but no added fibre, small but detectable amounts of polymeric glucose, rhamnose, arabinose, xylose, galactose, mannose and uronic acids, i.e. sugars occurring in dietary fibre, were excreted in faeces. 3. Dietary fibre in wheat bran was rather resistant to fermentation; 63% was recovered in the faeces. Guar gum, on the other hand, was almost completely fermented, whereas 19 and 25% of the uronic acids in low and high methoxylated pectin respectively, were excreted in faeces. The various constituents of sugar-beet dietary fibre (approximately equal amounts of arabinose-based hemicellulose, pectin and non-starch glucan (cellulose)) showed quite variable availability for micro-organisms in that 6-12% of the arabinose, 17-25% of the uronic acids, and 52-58% of the cellulose were recovered in the faeces. 4. Faecal nitrogen excretion increased on addition of any one of the dietary fibre preparations studied, resulting in decreased true and apparent protein digestibility values. 5. The faecal dry weight increment was most pronounced when feeding bran and could then almost be accounted for by the remaining fibre and by protein. The less-prominent bulking effect of guar gum and pectins, that were much more extensively fermented, could be only partly explained by dietary fibre and protein. SN - 0007-1145 UR - https://www.unboundmedicine.com/medline/citation/6282300/Fermentation_of_dietary_fibre_components_in_the_rat_intestinal_tract_ L2 - https://www.cambridge.org/core/product/identifier/S0007114582000488/type/journal_article DB - PRIME DP - Unbound Medicine ER -