Monoethylenic isomers in cardiac lipids of rats fed partially hydrogenated herring oil

Compositional studies have been carried out to compare the monoethylenic fatty acid isomers of a partially hydrogenated herring oil with those found in the cardiac lipid of young rats fed this oil for 1 or 16 weeks. In general, all geometrical and positional isomers with chain lengths C 16 , C 18 , C 20 and C 22 found in the hydrogenated oil were also observed in cardiac lipid. Evidence was also obtained for the occurrence of β‐oxidation in the catabolism of the cis and trans isomers of these long chain acids.