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- W2068985535 abstract "We have investigated the reactivity between 11 flavonoids and 1-hydroxyethyl radical (HER). HER was recently implicated in many liver injuries induced by ethanol intoxication. In this study, HER was generated by radiolysis; due to its reaction rate, HER is well known to be responsible for solute degradation in irradiated ethanol. Flavonoid ethanol solutions were irradiated with gamma-rays and the flavonoid degradation was followed by HLPC. We observed the degradation of flavonols while all other flavonoids (flavones, flavanones, dihydroflavonols, catechins) were not degraded after irradiation. The major radiolysis products were identified by NMR and LC-MS and we concluded that flavonols were essentially transformed into depsides. We proposed a reactivity mechanism between flavonols and HER. In a first step, H-transfer occurred from the 3-OH group to HER. Afterwards, C-ring opening occurred due to the presence of the 2,3-double bond in flavonols. Finally, we calculated the reaction constants in order to evaluate the antioxidant activity of flavonols against HER and to compare it with reference compounds." @default.
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- W2068985535 date "2004-01-05" @default.
- W2068985535 modified "2023-10-05" @default.
- W2068985535 title "Reactivity of flavonoids with 1-hydroxyethyl radical: a γ-radiolysis study" @default.
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- W2068985535 doi "https://doi.org/10.1016/j.bbagen.2003.10.010" @default.
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