Occurrence of positional isomers of octadecenoic and hexadecenoic acids in human depot fat

Occurrence of positional isomers of octadecenoic and hexadecenoic acids in human depot fat

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Positional isomers of hexadecenoic aud octadecenoic acids of human adipose tissue have been separated by gas-liquid chromatography and their amounts determined by oxidative cleavage (MnO4 and IO4).The following isomeric octadecenoic acids were present: 7-octadecenoic acid (0.4%), 8- (1.9%), 9- (73.

0%), 10- (2.5%), 11- (19.0%) and 12- (3.2%).

The hexadecenoic acids have also been shown to be a mixture Tank Kit of positional isomers, in which the cis-9-isomer predominates.10-Hexadecenoic and 12-octadecenoic acids could conceivably be precursors of linoleic acid.The following branched fatty acids have also been determined in human depot fat: 13-methyltetradecanoic, 12-methyltetradecanoic, 14-methylpentadecanoic, 14-methylhexadecanoic, and 16-methylheptadecanoic acid.They were present in percentages of 0.

02-0.6% and their identification rests solely on comparison Exotic Snacks of their gas-liquid chromatographic retention times with those of synthetic compounds.