Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Antioxidant properties of 4,4 '-dihydroxy-3,3 '-dimethoxy-beta,beta '-bicinnamic acid (8-8-diferulic acid, non-cyclic form)
Autore:
Garcia-Conesa, MT; Wilson, PD; Plumb, GW; Ralph, J; Williamson, G;
Indirizzi:
AFRC, Inst Food Res, Dept Biochem, Norwich NR4 7UA, Norfolk, England AFRCNorwich Norfolk England NR4 7UA m, Norwich NR4 7UA, Norfolk, England USDA ARS, US Dairy Forage Res Ctr, Madison, WI 53706 USA USDA ARS MadisonWI USA 53706 Dairy Forage Res Ctr, Madison, WI 53706 USA
Titolo Testata:
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
fascicolo: 3, volume: 79, anno: 1999,
pagine: 379 - 384
SICI:
0022-5142(19990301)79:3<379:APO4''>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUGAR-BEET PULP; FERULIC ACID; CELL-WALLS; IDENTIFICATION; DEHYDRODIMERS; DIMERS;
Keywords:
ferulic acid; diferulic acids; 8-8-diferulic acid; antioxidant capacity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Garcia-Conesa, MT AFRC,,Inst Food Res, Dept Biochem, Norwich Res Pk, Norwich NR4 7UA, Norfolk AFRC Norwich Res Pk Norwich Norfolk England NR4 7UA folk
Citazione:
M.T. Garcia-Conesa et al., "Antioxidant properties of 4,4 '-dihydroxy-3,3 '-dimethoxy-beta,beta '-bicinnamic acid (8-8-diferulic acid, non-cyclic form)", J SCI FOOD, 79(3), 1999, pp. 379-384

Abstract

8-8-Diferulic acid (non-cyclic form) (4,4'-dihydroxy-3,3'-dimethoxy-beta,beta'-bicinnamic acid) was chemically synthesised and the antioxidant properties were assessed using (a) inhibition of ascorbate/iron-induced peroxidation of phosphatidylcholine liposomes, and (b) scavenging of the radical cation of ABTS (2,2'-azinobis (3-ethyl-benzothiazoline-6-sulphonate)) relativeto the water-soluble vitamin E analogue, Trolox C. The structure of the chemically synthesised 8-8 dimer was confirmed by H-1-NMR and mass spectrometry. Its absorption properties in ethanol were: lambda(max1): 320nm; lambda(max2): 287nm; lambda(min): 256nm; epsilon(lambda max1) (M(-1)cm(-1)): 14200/-1700 and epsilon(lambda max2) (M(-1)cm(-1)): 14300+/-1300. The 8-8 dimershowed the best antioxidant properties in the aqueous phase assay among the esterified dimers present in plant cell walls. Like the other ferulic dimers, 8-8-diferulic acid is a better inhibitor of lipid peroxidation than ferulic acid on a molar basis. Some of the factors possibly involved in the antioxidant effect of these compounds are: number of free hydroxyl groups inthe molecule, stability of transient radical and partition coefficient. (C) 1999 Society of Chemical Industry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 12:16:14