Panagiotis Kefalas

TL;DR: In this article, the total phenolics recovered by ethyl acetate from the water extract, were determined by the Folin-Ciocalteu procedure and ranged from 881-±-042 (Greek mountain tea) to 1216 −±-320 mg (Chinese green tea) GAE (Gallic acid equivalents)/cup The antioxidant activity was evaluated by two methods, DPPH and chemiluminescence assays, using Trolox and quercetin as standards.

TL;DR: In this paper, the authors determined the phenolic profile of seven different varieties of ripe date palm fruit (Phoenix dactylifera) from Algeria by LC-DAD-MS (ESI+), to investigate their respective antioxidant activities by the DPPH· method and to estimate their phenolic content using the Folin-Ciocalteu method.

TL;DR: In this paper, seven different extracts, fractions and residues of Navel sweet orange (Citrus sinensis) peel were evaluated for their radical scavenging activity by the DPPH and luminol induced chemiluminescence methods.

TL;DR: The correlation of the antioxidant properties with the principal polyphenols showed that individual compounds are weakly associated with all the antioxidant parameters, suggesting that the expression of antioxidant activity in aged red wines is rather a consequence of synergism between various phenolics, and it is not simply attributed to specific constituents.

TL;DR: In this paper, the authors assessed Greek regional, aged red wines for their polyphenolic composition using well-established spectrophotometric methodology, and tested for antioxidant potential by three different assays.