Abstract
The conditions of the formations of trans isomers of fatty acids, depending on the method of processing and storage of the raw material of microbial, plant and animal origin, were investigated. In the composition of lipids, except for the main trans-isomer elaidic acid, nonsignificant amounts of trans-2-hexen-4-ynal, trans-2-formlcyclopro-panecarboxylate, methyl octadeca-9-yn-l1-trans-enoate, trans-2, 2-dimethyl-3-(2-propenyl)-ethyl ester, trans-9-octadecenoic acid, and trans-1,5-heptadiene, and mixed isomers of methyl-octadeca-9-yn-1-trans-enoate, methyl-9-cis, 11-trans-octadecadienoate, 1-[trans-4-(2-iodo-ethyl) cyclohexyl]-trans-4-pentylcyclo-hexane and cis-9, and trans 11-octadecenoic acid. The major trans elaidic acid component was detected in natural objects of different origin in quantities not exceeding 0.05-0.11%. The combination of thermal processing with other parameters, especially enzymatic treatment, led to an increased proportion of trans isomers. The content of trans isomers is usually proportional to the time of storage of materials.
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