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Glycerides, waxes and sterols in ovaries of Ascaris lumbricoides (Nematoda)
Author(s) -
Tarr George E.,
Fairbairn Donald
Publication year - 1973
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02531909
Subject(s) - glyceride , cholestanol , campesterol , wax , chemistry , chromatography , saponification , sterol , acetic acid , valeric acid , butyric acid , fatty acid , organic chemistry , cholesterol , biochemistry
Glycerides (65%), ascaroside esters (33%), waxes (1.5%) and sterols (0.26%) accounted for essentially all the neutral lipids in A. lumbricoides ovaries. Nineteen per cent by weight of the triglycerides contained only long chain fatty acids. Nearly all the remaining triglycerides contained 1 mol volatile acid. Mono‐ and diglycerides, free fatty acids and triglycerides containing 2 mol volatile acids were present in very small amounts. Mole percentages of glyceride volatile acids were α‐methylavaleric (70), α‐methylbutyric (23), n ‐valeric (ca. 7), and traces of acetic, propionic, isobutyric and n ‐butyric. Mole percentages of the alcoholic component of the waxes were 96% 1‐octadecanol, and 4% of its 16, 17 and 19 carbon homologs. The acid components were α‐methylbutyric (75 mol%), acetic (16 mol%), propionic and n ‐valeric (each 4 mol%), and traces of n ‐butyric and α‐methylvaleric. Sterols (42 wt% cholesterol, 30% cholestanol, 9.5% campestanol, 8.2% stigmastanol, 6.6% β‐sitosterol, and 3.8% campesterol) were essentially the same as those found in the whole worm, except that no esterified sterols were present.