Fatty Acid Composition of Some Ranunculaceae Seed Oils

Abstract

The fatty acid composition of seed oils of eight Ranunculaceae was determinated in order to characterize new sources of gamma-linolenic acid. Fatty acids were identified as fatty acid methyl esters (FAME) by capillary gas-liquid chromatography (GC) and capillary GCFourier transform infrared spectroscopy (FTIR). For trienic FAME the use of a cyanopropylpolysiloxane stationary phase (CP-Sil 88) allowed the separation with high resolution of methyl ester of columbinic acid (trans-5,c/s-9,ds-12 18:3) and gamma-linolenic acid (cis-6,cis-9,cis-12 18:3).The results confirmed the presence of columbinic acid in Thalictrum seed oils, and that of gamma-linolenic acid in A n e m o n e and related species seed oils. The taxonomic subdivision of Ranunculaceae into sub-families and tribes, which resulted from morphological considera tions, did not account for the above results.

Effects of traditional processing methods of linseed oil on the composition of its triacylglycerols

“…The addition of lead drier to the oil leads to a small decrease in the relative number of TAGs with the more highly unsaturated fatty acids. This becomes evident when comparing sample F and D. The presence of the drier enhances oxidation and as a consequence the decrease of more reactive triple unsaturated species will be faster [70]. The composition of the precipitated material, D150 Precipitate, was clearly different from that of the oil above (D150) and a strong reduction of the triple unsaturated fatty acids is observed.…”

Natural products from medicinal plants: non-alkaloidal natural constituents of the Thalictrum species

“…[118][119] In leaves of T. simplex (Eastern Siberia population) Trofimova et al 98 have isolated saturated fatty acids (99)(100)(101)(102)(103)(104), in which acids C 16 and C 18 were dominant. Thus, from 21 fatty acids detected in the Thalictrum genus, 8 acids (99-106) are saturated (5-10%), 9 acids (107-115) are monoenes (12-49%), 2 acids (116,117) are dienes (22-27%) and 2 acids (118,119) are trienes (30-56%). The fatty acid composition of seed oils of all investigated species were shown to consist of about 50-60% fatty acids having double bonds in a trans-position.…”

“…The first report of fatty acids from Thalictrum (T. polycarpum) was by Bagby, et al 113 117 and by Freiman (Uzbekistan population: T. minus, T. flavum, T. foetidum, T. simplex and T. sultanobadens). [118][119] In leaves of T. simplex (Eastern Siberia population) Trofimova et al 98 have isolated saturated fatty acids (99)(100)(101)(102)(103)(104), in which acids C 16 and C 18 were dominant.…”