ANTIOXIDANT ACTIVITIES OF GRAPE MARC POLAR EXTRACTS

GITTO V; GERMANO GARCIA MARIA JOSE; FERERSIN G; LUNA L; FERRARI M; GIANNINI FA

Mendoza Argentina

Otro; XXXI Annual Scientific Meeting of the Cuyo Biology Society; 2013

Sociedad Biológica de Cuyo

The aim of this work is to study the antioxidant activity of polar extracts of grape marc used for the obtaining of fine wines. The most important secondary metabolites present in both wine and its byproducts are tannins and other phenolic compounds. There are multiple studies that show that they are the responsible for bio-activities such as anticancer and antiradical. The ability to capture the stable radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) of aqueous decoctions and infusions and methanolic extracts from Malbec, Syrah, Chardonnay and Tannat marcs were evaluated at concentrations of 1000 to 5 µg/ml. Interesting results were obtained mainly for Syrah methanolic extracts and Malbec aqueous decoction (90% and 73% of inhibition at a concentration of 100 µg/ml respectively). These results confirm the potential of using the pomace from these red grapes as feedstocks for the production of antioxidants.