THE DISTRIBUTION OF DELTA-5 POLYENE ACIDS IN SOME PINE SEED OILS BETWEEN THE ALPHA-CHAINS AND BETA-CHAINS BY C-13-NMR SPECTROSCOPY

被引:33
作者
GUNSTONE, FD [1 ]
SETH, S [1 ]
WOLFF, RL [1 ]
机构
[1] UNIV BORDEAUX 1,ISTAB,TALENCE,FRANCE
关键词
DELTA-5; ACID; CHAMAECYPARIS LAWSONIANA SEED OIL; DISTRIBUTION BETWEEN ALPHA AND BETA-CHAINS; C-13-NMR SPECTROSCOPY; PINE SEED OIL; PINUS SEED OIL; PINOLENIC ACID; TAXUS BACCATA SEED OIL;
D O I
10.1016/0009-3084(95)02488-5
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Seven Pinus seed oils, previously examined by gas chromatography (Ref. [3]), have been re-examined by C-13-NMR spectroscopy. The spectra clearly indicate the presence of Delta 5 acids (mainly a C-18 Delta 5,9,12 isomer) and almost all the signals have been assigned on the basis of relevant data already in the literature for Delta 5 esters. Using the intensities of appropriate signals it was possible to estimate the level of total Delta 5 acids from signals associated with the C-1, C-2, and glycerol carbon atoms and the level of n-6 acids from the omega 2 and omega 3 signals. The results were in accord with those previously obtained by gas chromatography. The Delta 5 acids were apparent only among the alpha-chains. Taxus baccata seed oil is shown to contain 5,9-18:2, but Delta 5 acids in Chamaecyparis lawsoniana seed oil were too low to be identified by NMR spectroscopy.
引用
收藏
页码:89 / 96
页数:8
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