Scavenging of benzylperoxyl radicals by carotenoids.

Abstract:

:Carotenoids scavenge simple lipid-like alkylperoxyl radicals. However, the rate constant is too low to be determined directly and the mechanism is likewise not known with certainty [Mortensen, A. and Skibsted, L.H. (1998) FEBS Lett. 426, 392-396]. It is demonstrated that carotenoids react with peroxyl radicals only slightly more reactive than lipidperoxyl radicals neither by electron transfer nor by hydrogen atom donation, but by adduct formation. Benzylperoxyl radicals are scavenged by the carotenoids beta-carotene and canthaxanthin with a second-order rate constant of at least 1 x 10(6) M(-1) s(-1) by formation of an adduct which decays in a first-order reaction.

journal_name

Free Radic Res

journal_title

Free radical research

authors

Mortensen A

doi

10.1080/10715760290006501

keywords:

subject

Has Abstract

pub_date

2002-02-01 00:00:00

pages

211-6

issue

2

eissn

1071-5762

issn

1029-2470

journal_volume

36

pub_type

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