Chemical characterization; antioxidant effect; Ocimum basilicum L. ;essential oil ; Comoros

Nowadays, many researches are interested in finding natural and antiradical substances because, in addition to their nutritional values, they could also help to balance the anti-protection systems of antioxidant and to protect against oxidative stress-related diseases, particular cardiovascular and neurodegenerative diseases, diabetes and cancer. Thus, the use of medicinal and aromatic plants for their therapeutic effects, prompted us to perform investigations on the antiradical activity of the essential oil of Ocimum basilicum, species used, in particularly, folk medicine in Comoros. The antioxidant activity was demonstrated by the spectrophotometric method of DPPH (2,2-diphenyl-1-picrylhydrazyl). The result showed that the essential oil of Ocimum basilicum has an anti-radical effect compared to BHT (Butylhydroxytoluene) as antioxidant reference. Concentration value of IC50 is 7.75 mg/mL. The major component of the essential oil of Ocimum basilicum was methyl chavicol (estragole) with a rate of 80.04%.