Radical-scavenging capacity of phenol fractions in the brown seaweed Ascophyllum nodosum: an electrochemical approach |
| |
Authors: | Blanc Nathalie Hauchard Didier Audibert Laetitia Gall Erwan Ar |
| |
Institution: | a Laboratoire Sciences Chimiques de Rennes, UMR CNRS 6226, Ecole Nationale Supérieure de Chimie de Rennes, Avenue du Général Leclerc, CS 50837, 35708 Rennes, Cedex 7, France b Laboratoire d’Ecophysiologie et de Biotechnologie des Halophytes et des Algues Marines, EA 3877, IUEM, Université de Bretagne Occidentale - UEB, 29280 Plouzané, Brittany,France |
| |
Abstract: | In this article, the radical-scavenging capacity of phenol fractions extracted from the brown seaweed Ascophyllum nodosum was assessed using in parallel colorimetric methods (ABTS and DPPH) and electrochemistry (cyclic voltammetry). Results obtained by the three methods correlated in the case of global fractions, whereas only ABTS and DPPH correlated when activities were expressed on a phenol basis. The successive fractions separated by both their average molecular size and their polarity exhibited activities largely dependant on their phenol content, suggesting that phlorotannins are the main anti-oxidant molecules in hydro-alcoholic extracts of A. nodosum. In addition, phenol fractions of relative low molecular weight were clearly more active than others. This work opens new opportunities to better evaluate the radical-scavenging potential of phenol pools in algae using both bi-parametric fractionating and electrochemistry. |
| |
Keywords: | Ascophyllum Phlorotannins Phenol content Electrochemistry Radical-scavenging |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|