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Composition of liver fats of mature and embryo sharks (galeocerdo tigrinus)
Author(s) -
Pathak S. P.,
Suwal P. N.
Publication year - 1955
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/bf02649019
Subject(s) - degree of unsaturation , chemistry , embryo , palmitic acid , food science , biochemistry , acetone , composition (language) , biology , fatty acid , chromatography , fishery , linguistics , philosophy
SummaryTwo liver fats, one from the “mother” and the other from the “embryo” shark ( Galeocerdo tigrinus ), have been studied. Their component fatty acids are reported. The mixed fatty acids from each of the fats were first resolved into groups of acids of varying unsaturation by the lithium salt acetone and/or lead salt alcohol methods. The methyl esters of each of these groups of acids were fractionated through the Longenecker's E.H.P. column. The two fats are found to belong to the fourth group of Tsujimoto's classification of the Elasmobranch fish liver fats. The “mother” shark liver fat contains 43.3% saturated and 56.7% unsaturated acids. The “embryo” shark liver fat contains 39.1% saturated and 60.9% unsaturated acids. Palmitic acid was about 25% in both of the fats. A possible explanation for the less unsaturation and the absence of higher polyethenoids in the “embryo” liver fat is given.