Abstract
The present study exposed chemical composition and biological properties of propolis, collected from different area in North-West of Algeria. Propolis was extracted using two mixture of aqueous ethanol (50% and 85%) as solvents. The antioxidant activity of the extracts was determined using reducing power (RP) techniques. The total phenolic, flavonoid and carotenoid contents were also determined. Antibacterial action of the EPP was estimated in vitro against three microorganisms (Staphylococcus aureus, Salmonella. typhi and E. coli). Ethanol 85% was more effective in extracting total phenols, flavonoid and carotenoid. The propolis samples had strong antioxidant activities and the ethanol 85% solvent was exhibited comparatively high reducing power for all samples. Obtained results indicate that EEP has significant antibacterial activities. Our findings showed that all bacterial species exhibited different levels of sensitivities towards the tested propolis extracts. Furthermore, ethanol 85% extracts were more effective against the studied microorganisms compared with ethanol 50% extracts. The shown antimicrobial potential of propolis is of potential medical interest.
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