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A Study Of The Highly Unsaturated Fatty Acids Occurring In Fish Oils | by John Bernis Brown



Thesis submitted in partial fulfillment of the requirements for the degree of doctor of philosophy in chemistry in the graduate school of the university of illinois

TitleA Study Of The Highly Unsaturated Fatty Acids Occurring In Fish Oils
AuthorJohn Bernis Brown
PublisherThe University Of Illinois
Year1921
Copyright1921, The University Of Illinois
AmazonA Study of the Highly Unsaturated Fatty Acids Occurring in Fish Oils

By John Bernis Brown, M.S., .

Acknowledgment

The writer wishes to express his great indebtedness to Professor G. D. Beal under whose able direction the preparation of this thesis has been carried out, and who has made many valuable suggestions as to methods of attacking the problems involved. The writer desires also to thank Professor Roger Adams and Doctor C. S. Marvel of the Division of Organic Chemistry for very helpful advice concerning a number of the organic chemical problems involved in the thesis, Mr. Paul Anders for constructing the special fractionating apparatus used, and Doctor A. M. Patterson, former Editor of Chemical Abstracts, for offering valuable suggestions concerning the nomenclature of the highly unsaturated acids.

-The Highly Unsaturated Fatty Acids Of Fish Oils. Introduction
While engaged in the preparation of pure fatty acids for use in medical research during the late war under the auspices of the National Research Council, the writers had occasion to prepare pure clupa...
-Experimental Part. Attempted Preparation Of Clupanodonic Acid From Menhaden Oil
Preparation And Bromination Of The Esters Of Menhaden Oil In order to compare the methyl, ethyl and butyl esters of menhaden oil and their behavior towards bromination, they were prepared by a modi...
-Comparative Analysis Of Five Commercial Fish Oils
From the data given above it was evident that in the sample of menhaden oil used there were present highly unsaturated acids other than clupanodonic acid. Five fish oils which were available were anal...
-Separation Of The Highly Unsaturated Acids
From the facts mentioned above it is quite probable that the clupanodonic acid previously described in the literature was not a pure compound, but rather a mixture of a number of acids. Accordingly a ...
-Separation Of The Highly Unsaturated Acids By The Barium Soap-Benzene Method
The application of the barium soap-benzene method16 was attempted. This is based on the solubility of the barium soaps of fatty acids with more than one double bond in cold benzene containing about 5%...
-Separation By Reduction Of The Polybromides
The method used in the preparation of these polybromides was essentially the same as that which had previously been employed. A sample of commercial menhaden oil, dark reddish-amber in color, was a...
-Comparison Of The Acids Of Cod And Herring Oils
The highly unsaturated esters from cod and herring oils were prepared in a similar manner; 1620 g. of the methyl esters from 2000 g. of cod oil gave 480 g. of bromides, containing 70.75% of bromine. T...
-The Nature Of The Fatty Acid
The following conclusions may be drawn from the examination of the ester fractions of the various oils in the preceding table. The highly unsaturated acids would seem to contain 16, 18, 20 and 22 c...
-Summary
The methyl, ethyl and normal butyl esters of the acids of menhaden oil and their bromination products have been prepared and analyzed. The presence of more highly unsaturated acids than clupanodonic i...
-Vita
The writer of this thesis received his high school education in the Sterling Township High School, Sterling, Illinois during the years 1907 to 1911. He entered the University of Illinois in the fall o...







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