At present, it is widely-known that free radicals are the causes of illness such as cancers, coronary heart disease, Alzheimer’s disease and aging. One method of protection from free radical is the consumption of antioxidant-containing foods or herbs. Several analytical methods have been used for qualitative and quantitative determination of antioxidants. This project aimed to evaluate antioxidant activity of ethanolic and aqueous extracts from cabbage (Brassicca oleracea L. var. capitata L.) measured by DPPH and Hydroxyl radical scavenging method. The results show that averaged antioxidant activity measured in ethanolic extract (µmol Ascorbic acid equivalent/g fresh mass) were 7.316 ± 0.715 and 4.66 ± 1.029 as determined by DPPH and Hydroxyl radical scavenging activity assays respectively. Averaged antioxidant activity measured in aqueous extract (µmol Ascorbic acid equivalent/g fresh mass) were 15.141 ± 2.092 and 4.955 ± 1.975 as determined by DPPH and Hydroxyl radical scavenging activity assays respectively.

{"references": ["M Rai, K..P. Singh, B Singh, A Bahadur, K.A. Upadhyay, J Singh.\"Antioxidant phytochemicals in cabbage (Brassica oleracea L. var. capitata)\", Scientia Horticulturae., 2006, pp. 233-237.", "H-Y Luo, B Wang, C-G Yu, Y-L Qu, C-L Su.\"Evaluation of antioxidant activities of five selected brown seaweeds from Chin\", Journal of Medicinal Plants Research., 2010, pp. 2557-2565.", "F Liu, V.E.C. Ooi, S.T. Chang.\"Free radical scavenging activities of mushroom polysaccharide extracts\", Life Sciences., 1997, pp. 763-771.", "B Wang, Z-R Li, C-F Chi, Q-H Zhang, H-Y Luo.\"Preparation and evaluation of antioxidant peptides from ethanol-soluble proteins hydrolysate of Sphyrna lewini muscle\", Peptides., 2012, pp. 240\u2013250.", "Z Youwei, Z Jinlian, P Yonghong.\"A comparative study on the free radical scavenging activities of some fresh flowers in southern China\", LWT - Food Science and Technology., 2008, pp. 1586-1591."]}