Summary
The autoxidation of Δ9, 12 and Δ10, 12 methyl linoleate or the acids of these methyl esters was carried out under various conditions and the changes in characteristics compared by the removal of small samples at selected intervals of time. The results indicated that during the initial stages of autoxidation of Δ9, 12 methyl linoleate at 30°C. all of the oxygen could be demonstrated as peroxide, oxygen. On the other hand, no peroxide oxygen was former until the Δ10, 12 methyl linoleate had been oxidized for more than 100 hours. Furthermore, it was suggested that oxygen at room temperature was as effective in rearranging the CH:CH CH2 CH:CH system as alkali hydroxide and high temperature.
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The subject matter of this paper has been undertaken in cooperation with the Office of Naval Research. The opinions or conclusions contained in this report are those of the authors. They are not to be construed as necessarily reflecting the views or endorsement of the Navy Department.
Contribution No. 351 from the Department of Chemistry. A preliminary report of the work was given at the American Chemists' Society meeting in October, 1947.
Portin of a thesis presented by Robert R. Allen as partial fulfillment of the requirements for the degree of Master of Science.
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Allen, R.R., Jackson, A. & Kummerow, F.A. Factors which affect the stability of highly unsaturated fatty acids. I. Differences in the oxidation of conjugated and nonconjugated linoleic acid. J Amer Oil Chem Soc 26, 395–399 (1949). https://doi.org/10.1007/BF02749501
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DOI: https://doi.org/10.1007/BF02749501