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J Agric Food Chem ; 67(38): 10756-10763, 2019 Sep 25.
Artigo em Inglês | MEDLINE | ID: mdl-31483626

RESUMO

AFEX treatment of crop residues can greatly increase their nutrient availability for ruminants. This study investigated the concentration of acetamide, an ammoniation byproduct, in AFEX-treated crop residues and in milk and meat from ruminants fed these residues. Acetamide concentrations in four AFEX-treated cereal crop residues were comparable and reproducible (4-7 mg/g dry matter). A transient acetamide peak in milk was detected following introduction of AFEX-treated residues to the diet, but an alternative regimen showed the peak can be effectively mitigated. Milk acetamide concentration following this transition was 6 and 10 ppm for cattle and buffalo, respectively, but also decreased over time for cattle while tending to decrease (p = 0.08) for buffalo. There was no difference in acetamide concentration in the meat of cattle consuming AFEX-treated residues for 160 days compared to controls. Further investigation is necessary to determine the metabolism of acetamide in ruminants and a maximum acceptable daily intake for humans.


Assuntos
Acetamidas/análise , Ração Animal/análise , Bovinos/metabolismo , Produtos Agrícolas/química , Resíduos de Drogas/análise , Contaminação de Alimentos/análise , Carne/análise , Leite/química , Acetamidas/metabolismo , Amônia/química , Animais , Búfalos , Dieta/veterinária , Digestão , Leite/metabolismo
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