Further studies of the saturated methyl branched fatty acids of Vernix caseosa lipid

Further studies of the saturated methyl branched fatty acids of Vernix caseosa lipid By the method of capillary gas chromatography-mass spectrometry, we have identified 35 monomethyl and 46 dimethyl branched acids in the saturated acids of vernix caseosa lipid with chain lengths ranging from C 11 to C 18 . Many other mono-, di-, and trimethyl branched acids have been partially identified. All methyl branches were found to be on the even numbered C-atoms except for some terminal iso methyl groups. Three types of dimethyl branched acids were found: those with a terminal iso structure, those with a terminal anteiso structure, and those with neither iso nor anteiso structures. The 4-methyl branch predominated for all types of branched acids. Equivalent chain length data for di- and trimethyl branched acids were determined on a Pentasil (nonpolar) wall coated capillary column and checked by calculation from monomethyl branched acid data. Mass spectral identification was performed with and without the aid of a data system. A possible mode of formation of these acids is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Lipids Springer Journals

Further studies of the saturated methyl branched fatty acids of Vernix caseosa lipid

Lipids, Volume 11 (11) – Nov 1, 1976

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Publisher
Springer Journals
Copyright
Copyright © 1976 by American Oil Chemists’ Society
Subject
Life Sciences; Nutrition; Bioorganic Chemistry; Medicinal Chemistry; Medical Biochemistry; Biochemistry, general; Microbial Genetics and Genomics
ISSN
0024-4201
eISSN
1558-9307
DOI
10.1007/BF02533404
Publisher site
See Article on Publisher Site

Abstract

By the method of capillary gas chromatography-mass spectrometry, we have identified 35 monomethyl and 46 dimethyl branched acids in the saturated acids of vernix caseosa lipid with chain lengths ranging from C 11 to C 18 . Many other mono-, di-, and trimethyl branched acids have been partially identified. All methyl branches were found to be on the even numbered C-atoms except for some terminal iso methyl groups. Three types of dimethyl branched acids were found: those with a terminal iso structure, those with a terminal anteiso structure, and those with neither iso nor anteiso structures. The 4-methyl branch predominated for all types of branched acids. Equivalent chain length data for di- and trimethyl branched acids were determined on a Pentasil (nonpolar) wall coated capillary column and checked by calculation from monomethyl branched acid data. Mass spectral identification was performed with and without the aid of a data system. A possible mode of formation of these acids is discussed.

Journal

LipidsSpringer Journals

Published: Nov 1, 1976

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