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KMID : 0613820070170091237
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Journal of Life Science
2007 Volume.17 No. 9 p.1237 ~ p.1243
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Antioxidaive Activity of Lotus Root(Nelumbo nucifera G.) Extracts
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Lee Jae-Joon
Ha Jin-Ok
Lee Myong-Ryeol
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Abstract
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This study was investigated on the antioxidant capacity of 80% ethanol extract of lotus root in vitro. The extraction yields of 80 % ethanol extract was 9.14%. Lotus root ethanol extract was fractionated by the following: n-hexane, chloroform, ethylacetate and n-butanol. n-Butanol fraction showed the highest extraction yield of all fractions. Antioxidative activities of different fractions were examined by 1.1-diphenyl-2-picrylhydrazyl(DPPH) radical generation, the Rancimat test, the nitrite scavenging activity and the thiobarbituric acid(TBA) method, and compared with the properties of the commercial antioxidant butylated hydroxytoluene(BHT). The antioxidative capacity of the ethylacetate fraction was the highest among fractions and its fraction showed higher contents of total polyphenol. Furthermore, the antioxidative capacity of the ethylacetate fraction was similar to that of BHT. In conclusion, these results suggest that lotus root may be a good candidate as a natural antioxidant source.
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KEYWORD
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Antioxidative activity, lotus root, polyphenol
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