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Some minor fatty acids of rapeseed oils
Author(s) -
Sebedio J. L.,
Ackman R. G.
Publication year - 1979
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/bf02671754
Subject(s) - rapeseed , polyunsaturated fatty acid , chemistry , brassica , cis–trans isomerism , fatty acid , long chain , fraction (chemistry) , gas chromatography , thin layer chromatography , organic chemistry , food science , chromatography , botany , biology , polymer science
A number of minor unsaturated fatty acids of rapeseed oil (from Brassica napus or campestris ) have been isolated by combinations of distillation preparatve gas liquid chromatography and silver nitrate thin layer chromatography, and were further identified by oxidative fission in BF 3 ‐MeOH. Among the shorter chain, all‐ cis polyunsaturated fatty acids described are 16:3ω3, 16:2ω6 and 14:2ω6. A ubiquitous minor component in unproceessed oils was found to be cis‐9, cis‐12, trans‐15 ‐octadecatrienoic acid, with lesser proportions of the trans‐9, cis‐12, cis‐15 isomer. Among others identified were cis ‐14:1ω9 and 15:1ω10, the latter accompanied by half as much trans ‐15:1ω10. Particular attention was paid to the proportions of the minor monoethylenic fatty acids of the ω7 series relative to the longer chain major ω9 monoethylenic fatty acids which have been reduced by plant breeding.