caa a22 4500 465796672 CHVBK 20180323112040.0 cr unu---uuuuu 170327e19900401xx s 000 0 eng 10.1007/BF02540652 doi (NATIONALLICENCE)springer-10.1007/BF02540652 Effects of flavonoids on thermal autoxidation of palm oil: Structure-activity relationships [Elektronische Daten] [N. Das, T. Pereira] The effects of several flavonoids and other known antioxidants on the thermal autoxidation of refined, bleached and deodorized (RBD)-palm oil were studied. The lipid peroxidation was indexed by measuring the malonyldialdehyde (MDA) production using the 2-thiobarbituric acid (TBA) test. The antioxidative action decreased in the order of morin > kaempferol > myricetin > quercetin > vitamin A > α-tocopherol > apigenin > (+)-catechin > chrysin > datiscetin > luteolin > naringin > taxifolin > rutin > butylated hydroxytoluene (BHT) > naringenin. The flavonoid aglycones were more potent in their antiperoxidative action than their corresponding glycosides. Structure-activity revealed that the flavonoid molecule with polyhydroxylated substitutions on rings A and B, a 2-3 double bond, a free 3-hydroxyl substitution and a 4-keto moiety, would confer potent antiperoxidative properties upon the compound. The flavonols, namely morin, myricetin, kaempferol and quercetin, would be suitable potential antioxidants for use in the stabilization of RBD-palm oil and its fractions against thermal autoxidation. The structural activity of the flavonoids on the RBD-palm oil was similar to those observed for these compounds in animal tissue or enzyme systems. AOCS Press, 1990 Das N. Laboratory of Flavonoid Research, Department of Biochemistry, Faculty of Medicine, National University of Singapore, 10 Kent Ridge Crescent, O511, Singapore, Republic of Singapore aut Pereira T. Laboratory of Flavonoid Research, Department of Biochemistry, Faculty of Medicine, National University of Singapore, 10 Kent Ridge Crescent, O511, Singapore, Republic of Singapore aut Journal of the American Oil Chemists' Society Springer-Verlag 67/4(1990-04-01), 255-258 0003-021X 67:4<255 1990 67 11746 https://doi.org/10.1007/BF02540652 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02540652 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Das N. Laboratory of Flavonoid Research, Department of Biochemistry, Faculty of Medicine, National University of Singapore, 10 Kent Ridge Crescent, O511, Singapore, Republic of Singapore aut NATIONALLICENCE 700 1- Pereira T. Laboratory of Flavonoid Research, Department of Biochemistry, Faculty of Medicine, National University of Singapore, 10 Kent Ridge Crescent, O511, Singapore, Republic of Singapore aut NATIONALLICENCE 773 0- Journal of the American Oil Chemists' Society Springer-Verlag 67/4(1990-04-01), 255-258 0003-021X 67:4<255 1990 67 11746 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer