Amino Acids in Feeds, Estimation and Stability of Added DL-Methionine in Mixed Feeds

Rohdenburg, Edward L.; Rosenberg, Hans

doi:10.1021/jf60068a007

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Amino Acids Proteins and Meat Foods1

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1958

1978

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“…Special attention was given to the problem of preliminary hydrolysis of the protein in these lowprotein materials. A simplified method was described for the assay of added synthetic methionine in mixed poultry feeds (146). Assay conditions for the microbiological procedures using turbidimetry rather than titrimetric measurement of microbial growth -were studied {151).…”

Section: Amino Acids Proteins and Meat Foodsmentioning

confidence: 99%

Food

Morgareidge¹

1959

Anal. Chem.

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Section: Amino Acids Proteins and Meat Foodsmentioning

confidence: 99%

Food

Morgareidge¹

1959

Anal. Chem.

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“…In a previous procedure (2) for the determination of DL-methionine in mixed feeds, the free amino acid was extracted from the feed with water, and the amount present in the extract assayed microbiologically with Streptococcus faecalis. This method was inapplicable to the hydroxy analog because the calcium salt is difficult to extract, and the assay organisms for determining methionine do not respond to the analog.…”

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Food Additives Determination, Estimation of Methionine Hydroxy Analog in Mixed Feeds

Rohdenburg¹

1962

J. Agric. Food Chem.

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An analytical procedure for the hydroxy analog of methionine, DL-a-hydroxy-7-methylmercaptobutyric acid, is required for the control of this supplement in commercial poultry feeds. In the method described, the analog is extracted from the feed with dilute HCI, and the clarified extract is assayed microbiologically with Lactobacillus arabinosis. The small amounts of the analog present in commercial feeds (0.05 to 0.10%) have been successfully determined.

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Studies on the chemical properties of cowpea powders supplemented and drum-dried with dl-methionine

Onayemi

1978

Food Chemistry

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Amino Acids in Feeds, Estimation and Stability of Added DL-Methionine in Mixed Feeds

Cited by 5 publications

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Food

Food

Food Additives Determination, Estimation of Methionine Hydroxy Analog in Mixed Feeds

Studies on the chemical properties of cowpea powders supplemented and drum-dried with dl-methionine

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