ETUDE DES ACTIVITES BIOLOGIQUE D’UNE PLANTE AROMATIQUE MEDICINALE

Abstract

This work to evaluate the antibacterial and antioxidant effect of essential oil extracted from Eucalyptus globulus from three regions of Algeria El-Menia, Ghardaïa and Ouargla. The essential oils are extracted using hydrodistillation technology. The extraction yield reached 0.94% at Ghardaïa. 0.43% El-Menia and 0.315% in Ouargla per 100 grams of plant studied. The antimicrobial activity of the extracts was evaluated by the method of diffusion by disc on agar against five types of bacteria and a yeast. Escherichia coli, Enterococcus faecalis is more sensitive to inhibition with a diameter of 13 mm and 14 mm respectively. The antioxidant activity of the essential oil was evaluated by the DPPH method, The extracts showed a strong antioxidant activity, the essential oil of Ouargla exhibiting the highest activity with IC50=27.0309 mg / ml, followed by the essential oil of El-Menia with IC50 =39.5964 mg / ml and IC50 =96.5316 mg / ml for the essential oil of Ghardaïa