| Abstract
| - The antioxidant potential of Castanea sativa Mill. leaf (sweet chestnut) was explored as a new sourceof active extracts. The capacity of the different fractions issued from aqueous, methanol, and ethylacetate extracts to inhibit the stable free radical 2,2-diphenyl-1-pycryl-hydrazyl, superoxide anion,and hydroxyl radical was measured by electronic spin resonance. Their scavenging potential wasanalyzed versus their amount of phenolic compounds. Among the active fractions, the most effectiveone was A6, an ethyl acetate fraction, which contained a high level of total phenolic compounds(29.1 g/100 g). Thus, a different extraction procedure was performed to concentrate the activecompounds of A6 in the new C. sativa leaf extract (CSLE). Compared to reference antioxidants(quercetin and vitamin E) and standard extracts (Pycnogenol, from French Pinus maritima bark, andgrape marc extract), it was observed that A6 and CSLE have high antioxidant potentials, equivalentto at least those of reference compounds. Keywords: Castanea sativa; ESR; antioxidant; phenolic compounds
|
