Untersuchungen zur Stickstoff- und Aminosäurenresorption im Dünndarm von wachsenden Schweinen

Abstract

The amount of endogenous N in the chyme at the end of the small intestine and the amino acid composition of the ileum chyme were ascertained with growing pigs with ileorectostomy after feeding qualitatively differentiated protein sources. In dependence on the protein used, distinct differences turned out for some amino acids with regard to their content in the ileum chyme. Bacteriologic and histologic investigations subsequent to the dissection of the test animals showed that - in comparison to the control animals-the functions of the small intestine remained the same during the time of the experiment. The experiment method described appears to be suitable for absorption investigations up to the end of the small intestine of growing pigs.

A comparative evaluation of ileo‐rectal anastomosis techniques for the measurement of apparent precaecal digestibilities of folate, niacin and pantothenic acid

“…From the present findings it was obvious that the vitamin concentrations excreted via the chyme were distinctly higher in animals fitted with the ESV than in animals fitted with the EEV, indicating that the ESV procedure may permit some bacterial fermentation to take place. Although it has been established that the ileo-rectal anastomosis technique with preserved ileo-caecal valve may prevent a backflow of digesta into the large intestine (SOUFFRANT et al 1985) our results show clear evidence of a reflux of digesta from the rectum into the colon with consequent stimulation of bacterial activity and vitamin synthesis in ESV-fitted animals. The magnitude of the differences in digestibilities between the ESV and EEV techniques was frequently similar for the vitamins folate and niacin, in which the ESV technique provides a 20% lower digestibility value than the EEV technique.…”