Extracts of Cissus quadrangularis L. were tested for antioxidant activity by b-carotene linoleic
acid model and also by 1,1-diphenyl-2-picrylhydrazyl model. The ethyl acetate fraction of
both fresh and dry stem extracts at a concentration of 100 ppm showed 64.8% antioxidant activity
in the b-carotene linoleic acid system and 61.6% in the 1,1-diphenyl-2-picrylhydrazyl
system. This fraction showed the presence of sterols, vitamin C, and tannins as phytoconstituents.
The antioxidant activity of methanol extract and aqueous extract were comparatively
less significant than that of ethyl acetate extract, and n-hexane extract showed the least activity.
The ethyl acetate extract and methanol extract of both fresh and dry stems further exhibited
antimicrobial activity against Gram-positive bacteria, including Bacillus subtilis,
Bacillus cereus, Staphylococcus aureus, and Streptococcus species. The results of the study
have implications in the use of C. quadrangularis as an antibacterial agent and more so as an
antioxidant in several applications requiring these properties.
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 ppm showed 64.8% antioxidant activityin 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 tannins as phytoconstituents.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 activity.The ethyl acetate extract and methanol extract of both fresh and dry stems further exhibitedantimicrobial 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 applications requiring these properties.
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