1935
DOI: 10.1042/bj0290138
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A new spectroscopic phenomenon in fatty acid metabolism. The conversion of “pro-absorptive” to “absorptive” acids in the cow

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Cited by 20 publications
(13 citation statements)
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“…Dann et al [1935] found that when fats containing polyethylenic acids are given to the cows they are converted from the spectroscopically " pro-absorptive"' into the " absorptive " state. This phenomenon was similar to that found to occur in vitro on the prolonged refluxing of cod liver oil with alcoholic KOH [Dann & Moore, 1933]. The purpose of these notes is to record data obtained upon three specimens of butter obtained from cows under different nutritional treatments.…”
supporting
confidence: 74%
“…Dann et al [1935] found that when fats containing polyethylenic acids are given to the cows they are converted from the spectroscopically " pro-absorptive"' into the " absorptive " state. This phenomenon was similar to that found to occur in vitro on the prolonged refluxing of cod liver oil with alcoholic KOH [Dann & Moore, 1933]. The purpose of these notes is to record data obtained upon three specimens of butter obtained from cows under different nutritional treatments.…”
supporting
confidence: 74%
“…This might be due to the presence in butterfat of small amounts of hitherto unknown acids having very high extinction coefficients, or, alternatively, that one or more of the known acids in butterfat are present in a form having a greater absorptive ability than the particular isomer of the same acids present in the foodstuff. Evidence that some such change can take place in the organism is supplied by Dann et al (95) who show that a similar alteration can also be brought about in certain fatty acids by boiling with alcoholic potash.…”
Section: Seasonal Variations and Other Factors Affecting Milk Secretionmentioning
confidence: 95%
“…from 0-5 to 6-7 %, in the conjugated dienoic acid contents of the butterfats, thus confirming the earlier work of Dann et at. (6) and of Houston et alil). Mattsson found also that the 'linoleic' acid content fell during the linseed-feeding experiment from 2% to nil, but that linolenic acid remained fairly constant at approximately 1-6%.…”
Section: Trienoic Acidsmentioning
confidence: 96%