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Antioxidant and Antimicrobial Activity of Cissus quadrangularis L.
G.A. Ravishankar,K.N. Chidambara Murthy,A. Vanitha,M. Mahadeva Swamy 한국식품영양과학회 2003 Journal of medicinal food Vol.6 No.2
Extracts of Cissus quadrangularis L. were tested for antioxidant activity by b-carotene linoleicacid model and also by 1,1-diphenyl-2-picrylhydrazyl model. The ethyl acetate fraction ofboth fresh and dry stem extracts at a concentration of 100 pm showed 64.8% antioxidant ac-tivity in the b-carotene linoleic acid system and 61.6% in the 1,1-diphenyl-2-picrylhydrazylsystem. This fraction showed the presence of sterols, vitamin C, and tanins as phytocon-stituents. The antioxidant activity of methanol extract and aqueous extract were comparativelyless significant than that of ethyl acetate extract, and n-hexane extract showed the least ac-tivity. The ethyl acetate extract and methanol extract of both fresh and dry stems further ex-hibited antimicrobial activity against Gram-positive bacteria, including Bacillus subtilis,Bacillus cereus, Staphylococcus aureus , and Streptococcus species. The results of the studyhave implications in the use of C. quadrangularis as an antibacterial agent and more so as anantioxidant in several aplications requiring these properties.9