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Absorption of amino acids in different parts of the small intestine in growing pigs 1. absorption of free amino acids and water



Absorption of amino acids in different parts of the small intestine in growing pigs 1. absorption of free amino acids and water



Acta Physiologica Polonica 32(4): 419-428



Pigs weighing 50-75 kg with temporarily isolated loops of the proximal, middle and terminal small intestine were used. Isolated segments were perfused with solutions of casein acid hydrolysate containing 8, 12 or 16 g free amino acids/l. The capacity to absorb water increased along the small intestine reaching .apprx. 5 l/m per 24 h in the distal part. The absorption of N from all solutions was least in the proximal small intestine (up to 8 g/m per 24 h); there were no significant differences in N absorption between the other parts. The rates of absorption of various amino acids were different and depended on the concentration of amino acids in the intestine. On the whole, the rates of absorption of essential amino acids were as follows: Arg, Met, Ile, Leu > Val, Phe > Lys > Thr, His. Of the nonessential amino acids, Glu and Gly were absorbed to a lesser extent than the others.

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Accession: 004649582

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PMID: 7331829


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