Investigations on the amino acid secretion and absorption in the stomach of the growing pig.
Two pigs of 35 kg live weight were fitted with re-entrant duodenal cannulas anterior to the pancreatic duct and fed barley-soya or casein-wheat starch diets prior to the experiment. After 24 hours fasting they were given a single meal of 15N-labelled free amino acids-wheat starch (A) or 15N-labelled wheat (B) diets and digesta leaving the stomach was collected during 12 hours. The proportion of TCA soluble N in total N of digesta increased with time from 10 to 40% with diet B and decreased from 90 to 47% with diet A. Total N leaving the stomach within 12 hours accounted for 96% and 106% of N ingested on diet A and B, while the amount of 15N accounted for only 66 and 86% of 15N given in diets A and B, respectively. The content of endogenous N in the digesta was 1.22 g/12 h after feeding diet A and 1.67 g/12 h after feeding diet B. It was concluded that considerable amounts of N are secreted and absorbed in the part of the digestive tract proximal to the opening of the pancreatic duct.
D000042:Absorption; D000596:Amino Acids / Q000008:administration & dosage / Q000378:metabolism*; D000818:Animals; D004044:Dietary Proteins / Q000008:administration & dosage; D004386:Duodenum / Q000502:physiology; D005753:Gastric Mucosa / Q000378:metabolism; D008297:Male; D009584:Nitrogen / Q000008:administration & dosage / Q000378:metabolism / Q000502:physiology*; D013270:Stomach / Q000502:physiology*; D013552:Swine / Q000378:metabolism*
D000596:Amino Acids; D004044:Dietary Proteins; D009584:Nitrogen