Polyphenols in olive oils
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The levels of total polyphenols and o-diphenols were determined in virgin oils and in chloroform/methanol-extracted oils. The solventextracted oils were richer in polyphenols than the virgin oils. High polyphenol content was associated with a high resistance to oxidation of the oils. A linear relationship was found between polyphenol content and the oxidative stability of the virgin oils during storage at 60 C. After removal of the polyphenols, the oxidative stability of the oils decreased considerably and seemed to depend on polyunsaturated fatty acid concentration.
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- 1.Montedoro, G., and C. Cantarelli, Riv. Ital. Sost. Grasse 46:3 (1969).Google Scholar
- 2.Vazquez Roncero, A., C. Janer del Valle and M.L. Janer del Valle, Grasas Aceites (Seville) 24:350 (1973).Google Scholar
- 4.Montedoro, G., Ann. delia Fac. Agrar. Univ. Studi Perugia 28:97(1973).Google Scholar
- 5.Ragazzi, E., and R. Verronese, Riv. Ital. Sost. Grasse 50:443 (1973).Google Scholar
- 6.Vazquez Roncero, A., C. Janer del Valle and M.L. Janer del Valle, Grasas Aceites (Seville) 27:185 (1976).Google Scholar
- 7.Van Buren, J., in “The Biochemistry of Fruits and Their Products,” Vol. 1, edited by A.C. Hulme, Academic Press, London, England, 1970, p. 271.Google Scholar
- 10.Pridham, J.B., “Methods in Polyphenol Chemistry,” Pergamon Press, London, 1963, p. 138.Google Scholar
- 11.“Official and Tentative Methods of the American Oil Chemists’ Society,” Third Edition, AOCS, Champaign, IL, 1975, Method Cd 8–53.Google Scholar
- 12.Gutfinger, T., O. Vatario, M. Alter and A. Letan, Grasas Aceites (Seville) 26:8 (1975).Google Scholar
- 13.Emanual, E.M., and Yu. N. Lyaskovskaya, “The Inhibition of Fat Oxidation Processes,” Pergamon Press, London, 1967, p. 231.Google Scholar