A comparison of methods employed to evaluate antioxidant capabilities
Biol. Res
; 33(2): 71-77, 2000. tab
Article
em En
| LILACS
| ID: lil-443676
Biblioteca responsável:
BR1.1
ABSTRACT
Three different methodologies frequently employed to evaluate the indexes that report the antioxidant capabilities of pure compounds and/or complex mixtures of antioxidants are applied to a series of mono- and polyphenols, as well as to two wine (red and white) samples. These methodologies are based on the bleaching of a stable radical, the effect of the additive upon luminol chemiluminescence induced by peroxyl radicals, and the effect of the additive upon the bleaching of the fluorescence from a dye molecule. Widely different responses are obtained from the different methodologies. These differences are interpreted in terms of the different factors (stoichiometric factors and/or reactivities) that determines the indexes evaluated by these different methodologies.
Texto completo:
1
Base de dados:
LILACS
Assunto principal:
Peróxidos
/
Espectrometria de Fluorescência
/
Vinho
/
Cromanos
/
Medições Luminescentes
/
Antioxidantes
Idioma:
En
Ano de publicação:
2000
Tipo de documento:
Article