Abstract
The ethanolic extracts of two types of cuban propolis (R and P) showed a similar manner of scavenging action against different species of oxygen radicals which were generated by specific chemical reactions. Chemiluminescence produced by Superoxide generated from the xanthine-xanthine oxidase reaction was 50% inhibited by approximately 5 μg ml of propolis R and 9.5 μg ml of propolis P and by catechin (0.15 μg/ml) and Superoxide dismutase (72 ng ml ). Alkoxy radical scavenging effect was similar to that produced by 0.11 μg/ml of α-tocopherol: inhibition of Chemiluminescence by 50% was caused by approximately 0.6 μg/ml of both propolis preparations. The results indicate that the antioxidative properties of both propolis could be attributed to their free radical scavenging activity against alkoxy radicals and to a lesser degree against Superoxide.
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