• Publications
  • Influence
Structure-antioxidant activity relationships of flavonoids and phenolic acids.
The factors underlying the influence of the different classes of polyphenols in enhancing their resistance to oxidation are discussed and support the contention that the partition coefficients of the flavonoids as well as their rates of reaction with the relevant radicals define the antioxidant activities in the lipophilic phase. Expand
A novel method for measuring antioxidant capacity and its application to monitoring the antioxidant status in premature neonates.
The method has been applied to investigate the total plasma antioxidant capacity of neonates and how this may be compromised in prematurity, and an antioxidant ranking was established based on their reactivity relative to a 1.0 mmol/l Trolox standard. Expand
Antioxidant properties of phenolic compounds
It is now possible to establish the antioxidant activities of plant-derived flavonoids in the aqueous and lipophilic phases, and to assess the extent to which the total antioxidant potentials of wine and tea can be accounted for by the activities of individual polyphenols. Expand
Total antioxidant status in plasma and body fluids.
The total antioxidant status in plasma and body fluids is discussed, which is based on inhibition of spontaneous tissue autoxidation by antioxidants. Expand
Factors influencing the antioxidant activity determined by the ABTS.+ radical cation assay.
This study introduces a simple direct antioxidant assay, based on the reduction of the ABTS, and compares it with the myoglobin/ABTS, establishing that the antioxidants studied to date in the latter assay act by scavenging the AB TS. Expand
Antioxidant activities of carotenes and xanthophylls
The results show that the relative abilities of the carotenoids to scavenge the ABTS·+ radical cation are influenced by the presence of functional groups with increasing polarities, such as carbonyl and hydroxyl groups, in the terminal rings, as well as by the number of conjugated double bonds. Expand
Polyphenolic flavanols as scavengers of aqueous phase radicals and as chain-breaking antioxidants.
Against propagating lipid peroxyl radical species, epicatechin and catechin are as effective as ECG and EGCG, the least efficacious being EGC and GA. Expand
The relative antioxidant activities of plant-derived polyphenolic flavonoids.
The relative antioxidant activities, against radicals generated in the aqueous phase, of a range of plant-derived polyphenolic flavonoids, constituents of fruit, vegetables, tea and wine, have been assessed and compounds such as quercetin and cyanidin have antioxidant potentials four times that of Trolox, the vitamin E analogue. Expand
Antioxidant activities of flavonoids as bioactive components of food.
The polyphenolic content of fruit and vegetables and their antioxidant activities. What does a serving constitute?
Analysis of the major flavone, flavonol, anthocyanidin and hydroxycinnamic acid constituents (and their glycosides) of onion, tomato, egg plant and apple has been undertaken and the antioxidantExpand