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Viscoelastic properties of the small intestinal and caecal contents of the chicken

Published online by Cambridge University Press:  09 March 2007

T. Takahashi ,
M. Goto  and
T. Sakata
T. Takahashi
Affiliation:
Laboratory of Animal Nutrition, Faculty of Agriculture, Okayama University, Tsushimanaka 1-1-1, Okayama 700-8530, Japan
M. Goto
Affiliation:
Faculty of Bioresources, Mie University, Kamihama-cho 1515, Tsu 514-8507, Japan
T. Sakata*
Affiliation:
Department of Basic Sciences, Ishinomaki Senshu University, Ishinomaki 986-8580, Japan
*
*Corresponding author: Professor Takashi Sakata, fax +81 225 22 7746, email takashi_sakata@nifty.com
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Abstract

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We measured the coefficients of viscosity, shear rates and shear stresses of chicken small intestinal and caecal contents, including solid particles, using a tube-flow viscometer. The coefficients of viscosity of chicken small intestinal and caecal contents were correlated negatively with their shear rates, a characteristic typical of non-Newtonian fluids. The coefficient of viscosity of the small intestinal contents was lower than that of the caecal contents at a shear rate of 1 s−1. Chicken caecal contents were more viscous than pig caecal contents. The exponential relationship between shear stress and shear rate showed that chicken small intestinal and caecal contents had an apparent Herschel–Bulkley fluid nature. These results indicate that solid particles, including uric acid crystals, are mainly responsible for the viscosity of the digesta in the chicken.

Keywords

BroilerIntestinal contentsViscoelasticityFlow behaviour
Type
Research Article
Information
British Journal of Nutrition , Volume 91 , Issue 6 , June 2004 , pp. 867 - 872
Copyright
Copyright © The Nutrition Society 2004

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