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Component fatty acids of Indian shark liver oils
Author(s) -
Pathak S. P.,
Agarwal C. V.,
Mathur S. S.
Publication year - 1952
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/bf02631718
Subject(s) - myristic acid , chemistry , palmitic acid , fractionation , stearic acid , arachidic acid , fraction (chemistry) , composition (language) , food science , chromatography , lauric acid , organic chemistry , fatty acid , linguistics , philosophy
SummaryTwo samples of the liver oil of an Indian species of shark ( Galeocerdo rayneri ), one from the Arabian Sea, and the other from the Bay of Bengal, have been studied. Their component acids are reported. Tsujimoto's lithium salt acetone method has been adopted for the separation of highly unsaturated acid fraction from the mixed acids in one case while in the other the modified technique of Lovern has been followed. The insoluble acids have been further resolved into two fractions with the help of Hilditch's modified lead‐sal alcohol method. The efficient column (E.H.P.) of Longenecker has been employed for fractionation in the present work. The liver oils are found to belong to the fourth group of Tsujimoto's classification of the Elasmobranch fish liver oils. Shark liver oil No. 1 contains 40.9% saturated acids (palmitic 24.9%, stearic 11.1%, also myristic 3.3%, and minor proportions of lauric, arachidic, and lignoceric) and 59.1% unsaturated acids (C 16 is 11.2%, C 18 19.6%, C 20 and above 27.1%, also some C 12 and C 14 monoethenoids).Shark liver oil No. 2 has the following composition: saturated acid 39.9% (palmitic 23.6%, stearic 14.5%, and myristic 1.5%, together with a minor amount of arachidic acid) and unsaturated acids 60.1% (mainly C 16 10.9%, C 18 23.3%, and C 20 and above 25.7%; C 14 acids are also present). The abnormal saturated acid content is discussed. These analyses provide the third instance of this peculiar group of Elasmobranch liver oils.