Free amino -nitrogen used as a monitor for the uptake and movement of amino acids in sheep
- 30 November 1977
- journal article
- research article
- Published by Cambridge University Press (CUP) in The Journal of Agricultural Science
- Vol. 89 (3), 541-550
- https://doi.org/10.1017/s0021859600061311
Abstract
Summary: Free amino -N estimations were used to monitor the movement of amino acids in the vascular system of sheep. The net uptake of free amino-N by portal drained viscera was measured in whole blood and compared with the net gain in the plasma flow.In normally fed sheep eating dried grass, lucerne or silage the net gain of free amino -N in the plasma of portal blood contributed less than 80% to the total uptake in whole blood. When the protein component of the diet was added into the abomasum (casein supplement to a low nitrogen basal ration) the plasma contribution to the net gain in portal blood averaged 95%.The results suggest that the cells as well as the plasma are involved in the transport of amino acids in blood and that in ruminants all amino acids have to be measured in blood for a quantitative calculation of the absorption from portal drained viscera.Keywords
This publication has 12 references indexed in Scilit:
- Amino Acid Absorption by Portal-Jugular Venous Differences in Sheep Fed Two Maturities of Alfalfa HayJournal of Animal Science, 1975
- Distribution and Dynamics of Body Fluids in SheepPublished by Springer Nature ,1975
- Portal blood flow and heat production in the digestive tract of sheepBritish Journal of Nutrition, 1973
- Net metabolism of plasma amino acids by liver and portal-drained viscera of fed sheepAmerican Journal of Physiology-Legacy Content, 1972
- Roles of plasma and erythrocytes in interorgan transport of amino acids in dogsAmerican Journal of Physiology-Legacy Content, 1972
- Quantitative Studies on Amino Acid Absorption in SheepJournal of Nutrition, 1972
- Amino acid movements between gut, liver, and periphery in unanesthetized dogsAmerican Journal of Physiology-Legacy Content, 1968
- Measurement of Venous Flow by Continuous Thermodilution and its Application to Measurement of Mammary Blood Flow in the GoatCirculation Research, 1966
- Comparison of Portal and Jugular Blood Plasma Amino Acids in Lambs at Various Intervals Postprandial2Journal of Animal Science, 1966
- An investigation into protein digestion with14C-labelled proteinBritish Journal of Nutrition, 1962