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Biological vs. Chemical evaluation of toxicity and protein quality of cottonseed meals
Author(s) -
Eagle Edward,
Blalek H. F.,
Davies D. L.,
Bremer J. W.
Publication year - 1956
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02638344
Subject(s) - gossypol , cottonseed meal , cottonseed , toxicity , chemistry , food science , protein quality , sodium hydroxide , yardstick , toxicology , microbiology and biotechnology , biology , biochemistry , mathematics , organic chemistry , soybean meal , raw material , geometry
SummaryToxicological evaluation of 68 cottonseed meals in rats failed to show a direct correlation between their toxicity and their free, total or combined gossypol content. The common practice of considering the free gossypol content of cottonseed meal as a yardstick for its toxicity is questioned. There was poor correlation between biologically evaluated protein quality of cottonseed meals and their nitrogen solubility in 0.02N sodium hydroxide. Application of this chemical test for indicating the protein quality of cottonseed meals is likewise questioned on the basis of existing evidence.