BIOLOGICAL AVAILABILITY OF AMINO ACIDS IN WHEAT BY-PRODUCTS

Availability of amino acids in vivo.

It has been known for many years that free amino acids are present in the blood and that their concentration increases after ingestion of a meal. In 1912 Van Slyke and Meyer (1) reported the presence of amino nitrogen in the non-protein fraction of the blood of dogs and that its concentra,tion increased after feeding meat. Abel et al. (2), using a vivi-diffusion apparatus, observed that free am...

The Terminal Amino Acids of Wheat Gliadin

Wheat gliadin has been found by two different methods to contain three N-terminal histidine residues for each molecular weight of 27,000. Trace amounts of N-terminal aspartic acid, glutamic acid, alanine, valine, and serine were also detected in the preparation used. Hydrolysis in boiling hydrochloric acid partially destroyed the di-2,4-dinitrophenyl derivative of histidine. Losses of from 5% t...

Ruminant Nutrition: Dairy: Starch, Amino Acids and By-Products Supplementation

466 The effect of arginine supplementation during pregnancy on uterine blood flow in dairy heifers. C. Yunta*1, B. R. Mordhorst2, K. A. Vonnahme2, C. Parys3, and A. Bach1,4, 1Department of Ruminant Production-IRTA, Caldes de Montbui, Barcelona, Spain, 2Center for Nutrition and Pregnancy, Department of Animal Science, North Dakota State University, Fargo, 3Evonik Industries AG, Hanau, Germany, 4...

Availability and effectiveness of free amino acids in aquaculture

While free amino acids are routinely used in feeds for terrestrial farm animals, it is – except for few aqua species – not commonly practiced in finfish and shrimp nutrition. Reasons for not using free amino acids are often related to doubts on the efficiency and availability of these ingredients. This paper discusses aspects on the availability and efficiency of supplemental amino acids in fis...

Effect of nitrogen fertilization on yield,protein and amino acids of irrigated mexipak wheat