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EPR and spectrophotometric investigation of the antioxidant capacity of some romanian grapes and wines

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în volumul unei conferinţe

Autori: C. Cimpoiu, A. Hosu, G. Damian, V. Miclaus

Editorial: Springer, Eur. Biophys. J., 36 (Suppl 1):S51–S248, p.171, 2007.

Rezumat:

The aim of our study was to investigate the antioxidant capacity of some ethanol extracts prepared from seeds and skins of different types of red grapes and corresponding commercial wines from Romanian Recas winery. The antioxidant activity was evaluated by UV-VIS and EPR spectroscopy using TEMPOL and DPPH free radicals. The changes in absorbance and in signals intensity were monitored. The experimental EPR spectra were double integrated and the relative concentrations of free radicals were determined.All samples reveal different antioxidant capacity depending on types of red grapes. The wines are less antioxidant than skins extracts. Seeds extracts show the highest antioxidant activity.

Cuvinte cheie: antioxidants, EPR, Tempol