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Endogenous Amino Acid Loss at the Terminal Ileum of Rats Fed Water-Extractable or Alkali-Extractable Soluble Non-Starch Polysaccharides Obtained from Wheat Bran When Fed with and Without Xylanase

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Author(s): Yonghui He | Wenqing Lu | Xiangshu Piao | Yongxi Ma | Jieyun Li | Defa Li

Journal: Journal of Animal and Veterinary Advances
ISSN 1680-5593

Volume: 5;
Issue: 8;
Start page: 629;
Date: 2006;
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Keywords: Ileal endogenous amino acid loss | wheat | soluble non-starch polysaccharides | rat

ABSTRACT
The objective of these studies was to determine how the endogenous amino acid flow at the terminal ileum of rats is affected by feeding diets containing water extractable or alkali extractable soluble non-starch polysaccharides obtained from wheat bran. In addition, the effect of xylanase on endogenous amino acid flow was studied. In experiment one, 40 Sprague-Dawley rats (190.92.0 g) were fed one of four protein-free diets, based on cornstarch, sucrose and soybean oil that contained 0, 20, 30, or 40 g kg 1 of water-extractable soluble non-starch polysaccharides. In experiment two, 40 Sprague-Dawley rats (204.31.6 g), were randomly allotted to one of four protein-free diets in a 2 x 2 factorial design with the diets containing 30 g kg 1 of either water-extractable or alkali-extractable soluble non-starch polysaccharides. The diets were fed with or without xylanase (2500 FTU/g) added at the expense of cornstarch. Chromic oxide (6 g kg 1 diet) was included in all diets as an indigestible marker. Both experiments lasted 8 d. The rats were killed on day 8 and the digesta contained in the final 20 cm of the ileum was obtained for assay. The results of experiment one revealed that adding graded levels of water-extractable soluble non-starch polysaccharides significantly increased (linear and quadratic effect; p
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