Stable isotopes to study sulfur amino acid utilization in broilers
نویسندگان
چکیده
منابع مشابه
Changes in body composition in broilers by a sulfur amino acid deficiency during growth.
In the factorial approach, amino acid (AA) requirements are determined using the AA composition of retained protein, which is assumed to be constant. However, this hypothesis may not be valid because the AA composition of body protein can be affected by the diet. The objective of this study was to quantify the changes in chemical body composition of broilers receiving diets either deficient (TS...
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Background and Aims: Since 1998, Iranian poultry industry has been affected by avian influenza (AI) virus, subtype H9N2. The association of high mortality and case report of H5N1 and H9N2 influenza virus in wild birds in recent years raised the suspicion of a possible new genetic modified AI virus. Methods: Partial nucleotide sequences and deduced amino acid of hemagglutinin (HA) genes of 4 H9...
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It has been reported that methionine and cystine are capable of accelerating the healing rate of wounds in injured rats to the same extent when present in the diet in equivalent amounts (1). This response was elicited in both the presence and the absence of dietary protein (2). Lysine, tryptophan, and valine do not appear to alter the healing process to a significant degree (3). Because methion...
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The optimum amino acid balance for broilers varies with ambient temperature. In particular, the optimum dietary arginine:lysine ratio increases at heat-stress temperatures, probably reflecting a reduced uptake of arginine from the digestive tract. Feed enzymes have generally improved amino acid digestibility but a standardised digestibility procedure is required before digestible amino acids wi...
متن کاملComparative species utilization and toxicity of sulfur amino acids.
Animal studies have shown that several methionine (Met) and cysteine (Cys) analogs or precursors have L-Met- and L-Cys-sparing activity. Relative oral bioavailability (RBV) values, with the L-isomer of Met and Cys set at 100% (isosulfurous basis), are near 100% for D-Met for animals but only about 30% for humans. Both the OH and keto analogs of Met have high RBV-sparing values, as does N-acetyl...
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ژورنال
عنوان ژورنال: Animal
سال: 2020
ISSN: 1751-7311
DOI: 10.1017/s1751731120001214