title: [Protein and amino acid metabolism in the digestive tract of growing bull calves. 5. The amino acid flow into the duodenum].
abstract: The flow of the individual amino acids (AA) into the duodenum was determined after the feeding of 28 different rations to young bulls supplied with duodenal re-entrant cannulae in the live weight range between 140 and 460 kg. The distribution of AA into AA of bacterial origin and AA from the feed was made by difference calculation between the AA at the duodenum (corrected by the endogenous AA quota) and the AA from the bacteria crude protein, with our own results based on a constant AA composition of the bacteria crude protein; by the regression analysis from relative values according to AAD/app. dig. org. m. = a + b AAF/app. dig. org. m. and by the regression analysis of the absolute values according to AAD = b1 app. dig. org. m. + b2 AAF showed the same results from the regression methods but deviating ones from the difference method. The calculation of the flow of the individual AA into the duodenum from the AA content of the ration and the content of app. dig. org. m. of the ration is possible. The equations derived for this purpose of the individual AA are given.
mesh_terms: D000596:Amino Acids / Q000032:analysis / Q000378:metabolism*; D000821:Animal Feed / Q000032:analysis; D000818:Animals; D001426:Bacterial Proteins / Q000032:analysis; D002417:Cattle / Q000378:metabolism*; D004044:Dietary Proteins / Q000032:analysis / Q000378:metabolism*; D004064:Digestive System / Q000378:metabolism*; D004386:Duodenum / Q000378:metabolism* / Q000382:microbiology; D005766:Gastrointestinal Contents / Q000032:analysis; D008297:Male; D012044:Regression Analysis
chemical_list: D000596:Amino Acids; D001426:Bacterial Proteins; D004044:Dietary Proteins
vernacular_title: Untersuchungen zum Protein- und Aminosäurenumsatz im Verdauungstrakt bei wachsenden Jungbullen. 5. Mitteilung. Fluss von Aminosäuren ins Duodenum.