산딸나무의 부위별 추출물 및 용매 분획물의 생리활성 비교
Comparison of Biological Activities of Extracts fromDifferent Parts and Solvent Fractions in Cornus kousa Buerg
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초록
Several extracts of different parts and solvent fractions of Cornus kousa were obtained and their functional material contents, antioxidant activities and tyrosinase inhibition effects were determined. Content of total polyphenols and flavonoids contents in flower were 169.638 mg·g-1 and 25.418 mg·g-1, respectively, which were much higher than those of other parts. Also, flower extracts showed the strongest effects on DPPH and ABTS radicals scavenging and ferrous ion chelating. In flower, leaf, and stem extracts, inhibition effects on peroxidation of linoleic acid determined by ferric thiocyanate (FTC) method were higher than a synthetic antioxidant, BHT. Tyrosinase inhibition activities were shown only in flower extract. Flower and leaf extracts, showing high biological activities in various system, were successively reextracted with n-hexane, chloroform, ethylacetate and n-butanol. Total polyphenol contents of water fractions were higher than any other solvent fractions in both flower and leaf, 67.006mg·g-1 and 66.739mg·g-1, respectively. But total flavonoid contents were higher in ethyl acetate fraction for flower extract and butanol fraction for leaf extract. Among the solvent fractions, the highest efficiency of free radical scavenging activities was obtained in ethyl acetate fraction for flower extract and n-butanol fraction for leaf extract. Tyrosinase inhibition activities were higher in water fraction for both flower and leaf extracts, 49.24% and 31.8%, respectively.
Abstract
Several extracts of different parts and solvent fractions of Cornus kousa were obtained and their functional material contents, antioxidant activities and tyrosinase inhibition effects were determined. Content of total polyphenols and flavonoids contents in flower were 169.638 mg·g-1 and 25.418 mg·g-1, respectively, which were much higher than those of other parts. Also, flower extracts showed the strongest effects on DPPH and ABTS radicals scavenging and ferrous ion chelating. In flower, leaf, and stem extracts, inhibition effects on peroxidation of linoleic acid determined by ferric thiocyanate (FTC) method were higher than a synthetic antioxidant, BHT. Tyrosinase inhibition activities were shown only in flower extract. Flower and leaf extracts, showing high biological activities in various system, were successively reextracted with n-hexane, chloroform, ethylacetate and n-butanol. Total polyphenol contents of water fractions were higher than any other solvent fractions in both flower and leaf, 67.006mg·g-1 and 66.739mg·g-1, respectively. But total flavonoid contents were higher in ethyl acetate fraction for flower extract and butanol fraction for leaf extract. Among the solvent fractions, the highest efficiency of free radical scavenging activities was obtained in ethyl acetate fraction for flower extract and n-butanol fraction for leaf extract. Tyrosinase inhibition activities were higher in water fraction for both flower and leaf extracts, 49.24% and 31.8%, respectively.
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