Endogenous losses

Determination of endogenous intestinal losses of Ca and digestibility of Ca in canola meal fed to growing pigs

González-Vega, J. C., C. L. Walk, and H. H. Stein. 2012. Determination of endogenous intestinal losses of Ca and digestibility of Ca in canola meal fed to growing pigs. J. Anim. Sci. 90(E-Suppl. 3):190 (Abstr.) Link to abstract (.pdf)

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Determination of endogenous intestinal losses of calcium and apparent and true total tract digestibility of calcium in canola meal fed to growing pigs

When formulating diets for pigs, it is more accurate to use values for standardized or true nutrient digestibility than values for apparent nutrient digestibility because the former are additive in mixed diets. No values for standardized or true total tract digestibility of calcium in pigs have been reported. The true total tract digestibility (TTTD) of a nutrient is calculated by correcting apparently total tract digestibility (ATTD) by total endogenous losses, which may be estimated using a regression procedure. To our knowledge, no measurements of the endogenous loss of calcium in pigs have been reported. An experiment was, therefore,  performed to measure endogenous loss of calcium and to determine TTTD of calcium in growing pigs, and to investigate if  the addition of microbial phytase to the diets affects TTTD of calcium. In addition, calcium retention was measured in pigs fed diets containing varying levels of calcium with or without microbial phytase.

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Effect of the form of dietary fat and the concentration of dietary neutral detergent fiber on ileal and total tract endogenous losses and apparent and true digestibility of fat by growing pigs

Kil, D. Y., T. E. Sauber, D. B. Jones, and H. H. Stein. 2010. Effect of the form of dietary fat and the concentration of dietary neutral detergent fiber on ileal and total tract endogenous losses and apparent and true digestibility of fat by growing pigs. J. Anim Sci. 88:2959-2967. Link to full text (.pdf)

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Amino acid availability and digestibility in pig feed ingredients: Terminology and application

de Lange, C. F. M., H. H. Stein, M. F. Fuller, P. J. Moughan, and B. Sève. 2006. Amino acid availability and digestibility in pig feed ingredients: Terminology and application. 10th Intl. Symp. Digestive Phys. In Pigs. Vejle, Denmark, May 14-17, 2006. Link to abstract (.pdf)

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Apparent, standardized, and true ileal digestibility of amino acids: What is the difference and practical significance?

Stein, H. H. 2006. Apparent, standardized, and true ileal digestibility of amino acids: What is the difference and practical significance? J. Anim. Sci. 84 (Suppl. 2):1 (Abstr.) Link to abstract (.pdf)

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Digestible amino acids: Determination and use

Stein, H. H. 2003. Digestible amino acids: Determination and use. Page 231-257 in Proc. 64th Minnesota Nutr. Conf.  Link to full text (.pdf)

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Endogenous secretions of proteins and amino acids in pregnant and lactating sows

Stein, H. H. and R. A. Easter, 1997. Endogenous secretions of proteins and amino acids in pregnant and lactating sows. In: J. P. LaPlace, C. Fevrier, and A. Barbeau (ED). Digestive physiology in pigs. EAAP publ. No 88. p. 321-324. St. Malo, France.  Link to full text (.pdf)

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Effects of body weight on total losses and amino acid composition of endogenous protein in growing pigs

Stein, H. H. 1998. Effects of body weight on total losses and amino acid composition of endogenous protein in growing pigs. In: University of Illinois Swine Research Reports, p. 78. Link to full text (.pdf)

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The effect of feeding level and physiological state on total flow and amino acid composition of endogenous protein in swine

Stein, H. H. 1998. The effect of feeding level and physiological state on total flow and amino acid composition of endogenous protein in swine. In: University of Illinois Swine Research Reports, p. 70. Link to full text (.pdf)

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Amino acid bioavailability and digestibility in pig feed ingredients: Terminology and application

Stein, H. H., B. Sève, M. F. Fuller, P. J. Moughan, and C. F. M. de Lange. 2007. Invited review: Amino acid bioavailability and digestibility in pig feed ingredients: Terminology and application. J. Anim. Sci. 85:172-180.  Link to full text (.pdf)

Apparent and true total tract digestibility of phosphorus in field peas (Pisum sativum L.) by growing pigs

Stein, H. H., M. G. Boersma, and C. Pedersen. 2006. Apparent and true total tract digestibility of phosphorus in field peas (Pisum sativum L.) by growing pigs. Can. J. Anim. Sci. 85:523-525. Link to full text (.pdf)

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Novel procedure for estimating endogenous losses and measuring apparent and true digestibility of phosphorus by growing pigs

Petersen, G. I., and H. H. Stein. 2006. Novel procedure for estimating endogenous losses and measuring apparent and true digestibility of phosphorus by growing pigs. J. Anim. Sci. 84:2126-2132. Link to full text (.pdf)

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Effect of feed intake on endogenous losses and amino acid and energy digestibility by growing pigs

Moter, V., and H. H. Stein. 2004. Effect of feed intake on endogenous losses and amino acid and energy digestibility by growing pigs. J. Anim. Sci. 82:3518-3528. Link to full text (.pdf)

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Animal effects on ileal amino acid digestibility

Stein, H. H. and M. Nyachoti. 2003. Animal effects on ileal amino acid digestibility. P. 223-241 in R. O. Ball (Ed.): Proc. 9th Intl. Symp. Digest. Phys. in Pigs, Vol. 1. Banff, Canada. Link to full text (.pdf)

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