23INVITRO ANTIOXIDANT STUDY ON COMBINED PLANTS EXTRACTS (CISSUS QUADRANGULARIS AND AEGLE MARMELOS)The study was designed to investigate the combined extracts of Cissus quadrangularis L. and Aegle marmelos were tested for antioxidant activity by DPPH Assay (1,1-diphenyl-2-picrylhydrazyl) method, FTC method, TBA method and qualitative analysis. The stem part of Cissus Quadrangularis and the fruit pulp of Aegle marmelos was collected and extracted with ethanol and ethyl acetate separately and mixed in equal proportion and it is used for the following tests. Both extracts exhibited significant antioxidant activity in all the above four methods. In DPPH assay, method Both Sample 1 (combined ethanolic extracts) and Sample 2 (combined ethyl acetate extracts) have better antioxidant activity. Sample 2 have more antioxidant activity when compared to Sample 1. In FTC method, Both Sample 1 (combined ethanolic extracts) and Sample 2 (combined ethyl acetate extracts) have better antioxidant activity. Sample 1 has more antioxidant activity when compared to Sample 2. In the TBA method, Both Sample 1 (combined ethanolic extracts) and Sample 2 (combined ethyl acetate extracts) have better antioxidant activity. Sample 1 has more antioxidant activity when compared to Sample 2. In the qualitative analysis of TLC plate method. Both Sample 1(combined ethanolic extracts) and Sample 2 (combined ethyl acetate extracts) have better antioxidant activity.premajeny@gmail.comResearch312013Cissus quadrangularis,Aegle marmelos,Medicinal plant,Antioxidant activity,DPPH AssayRathinam Prema,Dhana Sekaran Sathish Sekar,Kothapalli Bannoth Chandra Sekhar,Somasundaram JeevanandhamResearch Scholar, Jawaharlal Nehru Technological University, Anantapur, Andhra Pradesh, India- 515002,Arignar Anna College (Arts & Science), Krishnagiri, Tamil Nadu, India – 635 001.,Jawaharlal Nehru Technological University Anantapur, Andhra Pradesh, India – 515 002.,Santhiram College of Pharmacy, Nandyal, Andhra Pradesh, India – 518 112.