study chemicale composition,phytochimical,antioxidant and antimicrobial activity of some medicinal plants used in YEMEN

Abstract

The traditional medicine still plays an important role in the primary health care in Yemen. Celery seeds are known to have carminative, stimulant, stomachic, emmenagogue, diuretic, antirheumatic, anti- inflammatory, and laxative properties. The antioxidant activities of ethanol, methanol, water, hexane and ethyl acetate of Apiumgraveoleus L were investigated spectrophotometrically against 1,1- diphenyl-2-picrlhdrazyl, hydrogen peroxide, and by ferric reducing power , total antioxidant capacity methods .Total phenols ,flavonoids, tannins, alkaloids were also determined using the standard methods. The five extracts showed the beset of total phenol in water extracts (2549.9 mg/100g dw) but the lowest was in hexane extract (166.19 mg/100g). Methanol extracts exhibited the strongest activity against DPPH radicals,but the lowest was in hexane extract.The ferric reducing activities of the extracts were significantly lower than the standard drugs used in this order : vitamin C ˃ water ˃ ethyl acetate ˃ methanol ˃ ethanol ˃ hexane extract Keywords: celery. antioxidant. total phenol, total flavonoids