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Evaluation of the Antioxidant Activity of Syzygium cumini Leaves
Key Lab of Ministry of Education for Coast and Wetland Ecosystems, Xiamen 361005; P.R. China
Department of Biology, School of Life Sciences, Xiamen University, Xiamen 361005; P.R. China
* Author to whom correspondence should be addressed.
Received: 21 August 2008; in revised form: 10 October 2008 / Accepted: 13 October 2008 / Published: 16 October 2008
Abstract: The antioxidant activity of Syzygium cumini leaf extracts was investigated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical-scavenging and ferric-reducing antioxidant power (FRAP) assays. The methanolic extract and its four water, ethyl acetate, chloroform, and n-hexane fractions were prepared and subjected to antioxidant evaluation. The results showed that the ethyl acetate fraction had stronger antioxidant activity than the other ones. HPLC data indicated that S. cumini leaf extracts contained phenolic compounds, such as ferulic acid and catechin, responsible for their antioxidant activity. A significant linear relationship between antioxidant potency, free radical-scavenging ability and the content of phenolic compounds of leaf extracts supported this observation.
Keywords: Syzygium cumini; Antioxidant activity; Free radicals; High performance liquid chromatography
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MDPI and ACS Style
Ruan, Z.P.; Zhang, L.L.; Lin, Y.M. Evaluation of the Antioxidant Activity of Syzygium cumini Leaves. Molecules 2008, 13, 2545-2556.
Ruan ZP, Zhang LL, Lin YM. Evaluation of the Antioxidant Activity of Syzygium cumini Leaves. Molecules. 2008; 13(10):2545-2556.
Ruan, Zhi Ping; Zhang, Liang Liang; Lin, Yi Ming. 2008. "Evaluation of the Antioxidant Activity of Syzygium cumini Leaves." Molecules 13, no. 10: 2545-2556.