“…The differences between our results and those of Hasiak et al (1970a,b) are much too large to be readily explained. It is well known that the amino group of phosphatidylethanolamine reacts easily with carbonyls formed via autoxidation of polyunsaturated fatty acids of phospholipids (Lea, 1957) and plasmalogens are very easily hydrolyzed under the atmosphere (Nakanishi and Suyama, 1973) but sphingomyelin is very stable to oxidation Figure 5. Gas chromatograms of fatty acid methyl esters from neutral (1) and polar (2) lipid fractions of SC: A, di-n-butyl phthalate; B, bis(2-ethyl hexyl) phthalate.…”