Influence of Intermittent Heating during Maceration on the Antioxidant Capacity of Some Grape Seeds and Skins

  • Anamaria D. HOSU Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, 11 Arany Janos, RO-400082 Cluj-Napoca
  • Claudia CIMPOIU Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, 11 Arany Janos, RO-400082 Cluj-Napoca
  • Vasile MICLAUS University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, 3-5 Manastur St., 400372
  • Grigore DAMIAN Babes-Bolyai University, Faculty of Physics, 1 M. Kogalniceanu, RO-400084 Cluj-Napoca
  • Irina TARSICHE Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, 11 Arany Janos, RO-400082 Cluj-Napoca
  • Nastasia POP University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, 3-5 Manastur St., 400372

Abstract

Ethanolic extracts from seeds and skins of three red grape varieties, namely, 'Cabernet Sauvignon', 'Merlot' and 'Burgund' from a Romanian winery, were prepared by maceration using different temperature conditions. The stable free radicals DPPH (2, 2-diphenyl- 1-picrylhydrazyl) and Tempol (4-hydroxy-2,2,6,6-tetramethylpiperidin-N-oxyl) were used in order to evaluate the antioxidant capacity of the extracts. The variation in time of free radical concentration was followed by double integration of the EPR spectra of the samples obtained after maceration under different conditions (room temperature and intermittent heating). Results showed that the antioxidant capacity depends on the nature of analysed samples (either being seeds or skins) and grape variety. The results also show that the intermittent heating during maceration leads to a decrease of the antioxidant capacity of samples.

Metrics

Metrics Loading ...
Published
2010-06-15
How to Cite
HOSU, A. D., CIMPOIU, C., MICLAUS, V., DAMIAN, G., TARSICHE, I., & POP, N. (2010). Influence of Intermittent Heating during Maceration on the Antioxidant Capacity of Some Grape Seeds and Skins. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 38(1), 41-43. https://doi.org/10.15835/nbha3813492
Section
Research Articles