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KMID : 1098420110190050325
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Korean Journal of Medicinal Crop Science
2011 Volume.19 No. 5 p.325 ~ p.333
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Screening of Biological Activities to Different Ethanol Extracts of Rubus coreanus Miq.
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Kwon Ji-Wung
Lee Hee-Kwon
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Abstract
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This study was carried out to evaluate biological activities to different ethanol extracts from unripened and ripened fruit (Rubus coreanus Miq.). 25% to 75% ethanol extracts of unripened and ripened fruits were similar to extract yield respectively. Yield of ethanol extract of ripened fruit were approximately 3 times higher than that of unripened fruit. 75% ethanol extract of unripened fruit showed the highest contents of total polyphenol ( mg/g) and total flavonoid ( mg/g). Contents of total polyphenol and total flavonoid of unripened fruit were about 2 times higher than those of ripened fruit. values of DPPH radical scavenging activity and linoleic acid peroxidation inhibition activity of BHA and -tocopherol showed and , and respectively, but 75% ethanol extract of unripened fruit showed the lowest and among other all extracts. values of LDL (low density lipoprotein) oxidation inhibition activity and -glucosidase inhibitory activity of 75% ethanol extract of unripened fruit showed the lowest and among other all extracts respectively. Specifically, 75% ethanol extract of unripened fruit has relatively better biological activities than other ethanol extracts, it could be potentially used as bioactive source for health functional foods.
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KEYWORD
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Rubus coreanus Miq., DPPH, Linoleic Acid Peroxidation, Low Density Lipoprotein, -Glucosidase
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