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Radiolysis of lipids in monolayers. I. Saturated fatty acids
Author(s) -
Hau LungBin,
Nawar W. W.
Publication year - 1986
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/bf02638236
Subject(s) - monolayer , homologous series , chemistry , alkane , alkene , radiolysis , aldehyde , palmitic acid , cleavage (geology) , adsorption , irradiation , photochemistry , organic chemistry , fatty acid , catalysis , radical , materials science , biochemistry , physics , fracture (geology) , nuclear physics , composite material
In order to study the effect of molecular orientation on the behavior of lipids when exposed to high energy radiation, model systems of palmitic acid or ethyl palmitate adsorbed as monolayers on silica were irradiated with 60 Co at 25 Mrad under vacuum, and the volatile products compared with those of control samples irradiated in bulk. Major quantitative differences were observed. More of the C n −1 alkane relative to the shorter‐chain members of the homologous series were formed in bulk samples as compared to samples in monolayer. The C n −2 alkene and C n aldehyde also were formed in greater quantities in bulk. These observations are explained on the basis of a reduced preferential cleavage near the carbonyl group and a restricted mobility of free radical intermediates, in the case of the monolayers.