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http://dx.doi.org/10.3746/jkfn.2005.34.6.755

Free Radical Scavenging Effect and Extraction Condition of Ethanol Extracts and Fractions of Wild Grape Seed (Vitis coignetiea)  

Kim, Nan-Young (School of Biotechology and Bioengineering, Kangwon National University)
Kim, Young-Kuk (School of Biotechology and Bioengineering, Kangwon National University)
Bae, Ki-Ja (School of Biotechology and Bioengineering, Kangwon National University)
Choi, Jae-Ho (School of Biotechology and Bioengineering, Kangwon National University)
Moon, Jea-Hak (Division of Applied Bioscience & Biotechnology, Chonnam National University)
Park, Geun-Hyung (Division of Applied Bioscience & Biotechnology, Chonnam National University)
Oh, Deog-Hwan (School of Biotechology and Bioengineering, Kangwon National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.34, no.6, 2005 , pp. 755-758 More about this Journal
Abstract
Wild grape is a traditional medicine plant in north-eastern part of Asia and has been known to have healing properties for various illnesses. This study was to determine the optimum extraction condition and antioxidant activity of ethanol extracts of wild grape (V. coignetiae) seed. Also, organic solvent fractions of hexane, chloroform, ethyl acetate and butanol were obtained from the ethanol extract of wild grape seed at different temperatures. Total ethanol extraction yield of wild grape seed ranged from $4\%\;to\;12\%$ depending on the ethanol concentration, extraction temperature and time condition. The highest extraction yield of $11.9\%$ was obtained at $90\%$ ethanol condition for 12 hour at $70^{\circ}C$. However, the strongest free radical scavenging effect $(RC_{50})$ with $20.93\mu g/mL$ was observed in $70\%$ ethanol extract of wild grape seed extracted for 6 hour at $70^{\circ}C,\;while\;RC_{50}\;with\;40.42$\mu g/mL$ was observed in $90\%$ ethanol extract for 12 hour at $70^{\circ}C$. Antioxidant activity of ethanol extracts of wild grape seed increased as total phenol contents increased. Among each fraction obtained from organic solvents, ethyl acetate fraction was found to have the strongest $RC_{50}\;(8.6\mu g/mL)$ and 636.77 mg GAE/g phenol contents .
Keywords
wild grape seed; free radical scavenging; total phenol content;
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Times Cited By KSCI : 4  (Citation Analysis)
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