35400-16-9Relevant articles and documents
ANTIOXIDATIVE ACTIVITES OF OLEA EUROPAEA LEAVES AND RELATED PHENOLIC COMPOUNDS
Tutour, Bernard Le,Guedon, Didier
, p. 1173 - 1178 (2007/10/02)
Olea europaea leaves, oleuropein, hydroxytyrosol and tyrosol were compared with vitamin E and BHT, with regard to their antioxidative activities, by kinetic studies in model systems.The thermal initiated oxidation of methyl linoleate was performed on homogeneous solution at 60 deg or 40 deg with or without antioxidants.Olea europaea extracts, oleuropein and hydroxytyrosol were much more effective than BHT or vitamin E in extending the induction period.Assuming a stoichiometric factor f=2 for BHT, this coefficient of inhibition reached 5 for hydroxytyrosol, 7 for oleuropein and 10 for O. europaea extracts.These extracts owe their antioxidative properties to their high oleuropein content (19percent w/w) and also to a lesser amount of flavonoids (1.8percent w/w with 0.8percent of luteolin 7-glucoside).Tyrosol showed neither antioxidant nor prooxidant activity.No synergistic effect on the preservation of methyl linoleate was found when vitamin E was used together with tyrosol or O. europaea extracts. Key Word Index - Olea europaea; Oleaceae; olive tree; leaves, oleuropein; hydroxytyrosol; tyrosol; flavonoids; antioxidant; BHT, vitamin E; tocopherol; methyl linoleate.