caa a22 4500 465796710 CHVBK 20180323112040.0 cr unu---uuuuu 170327e19900401xx s 000 0 eng 10.1007/BF02540651 doi (NATIONALLICENCE)springer-10.1007/BF02540651 Tocotrienols from palm oil: Electron spin resonance spectra of tocotrienoxyl radicals [Elektronische Daten] [S. Goh, N. Hew, A. Ong, Y. Choo, S. Brumby] The major vitamin E components present in palm oil, viz. α-tocopherol, α−, ψ-and δ-tocotrienols, have been isolated and their structures verified by the NMR spectra of their acetate and succinate derivatives. Oxidation of γ-and δ-tocotrienols with alkaline K3Fe(CN)6 gave isolable dimeric species, which were studied by13C NMR. Free radicals generated from the monomeric and dimeric tocotrienols were investigated using ESR spectroscopy. The distinction between antioxidant activity and antioxidant capacity of vitamin E isomers is discussed. AOCS Press, 1990 Goh S. Chemistry Department, University of Malaya, 59100, Kuala Lumpur, Malaysia aut Hew N. Chemistry Department, University of Malaya, 59100, Kuala Lumpur, Malaysia aut Ong A. Persiaran Institusi, Palm Oil Research Institute of Malaysia, No. 6, B.B. Bangi, Selangor, Malaysia aut Choo Y. Persiaran Institusi, Palm Oil Research Institute of Malaysia, No. 6, B.B. Bangi, Selangor, Malaysia aut Brumby S. Research School of Chemistry, Australian National University, G.P.O. Box 4, 2601, ACT, Australia aut Journal of the American Oil Chemists' Society Springer-Verlag 67/4(1990-04-01), 250-254 0003-021X 67:4<250 1990 67 11746 https://doi.org/10.1007/BF02540651 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02540651 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Goh S. Chemistry Department, University of Malaya, 59100, Kuala Lumpur, Malaysia aut NATIONALLICENCE 700 1- Hew N. Chemistry Department, University of Malaya, 59100, Kuala Lumpur, Malaysia aut NATIONALLICENCE 700 1- Ong A. Persiaran Institusi, Palm Oil Research Institute of Malaysia, No. 6, B.B. Bangi, Selangor, Malaysia aut NATIONALLICENCE 700 1- Choo Y. Persiaran Institusi, Palm Oil Research Institute of Malaysia, No. 6, B.B. Bangi, Selangor, Malaysia aut NATIONALLICENCE 700 1- Brumby S. Research School of Chemistry, Australian National University, G.P.O. Box 4, 2601, ACT, Australia aut NATIONALLICENCE 773 0- Journal of the American Oil Chemists' Society Springer-Verlag 67/4(1990-04-01), 250-254 0003-021X 67:4<250 1990 67 11746 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer