Evaluation of homoarginine as a marker for the determination of endogenous amino acid concentrations in poultry excreta

amino acids analytical methods arginina arginine aves de corral casein caseina cocks coq cottonseed meal evaluation excrements excreta gallos ileum intestin intestines intestinos measurement mesure poultry small intestine soybean meal technique analytique tortas de soja tourteau de coton tourteau de soja volaille