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KMID : 0665420210360050522
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Korean Journal of Food Culture
2021 Volume.36 No. 5 p.522 ~ p.529
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Antioxidant and Antidiabetic Activities of Extracts from Quercus serrata Thunb and Q. acutissima Carruther
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Chu Ji-Hye
Choi Jin-Hee
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Abstract
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This study was conducted to analyze the antioxidant and antidiabetic activities of acorns according to the types of Quercusserrata Thunb (QST) and Q. acutissima Carruther (QAC). The total polyphenol contents of the extracts from QST and QACwere 220.59 and 320.96 mg GAE/g, respectively. The content of total polyphenol of QAC was higher than that of QAC(p<0.001). DPPH (2,2 Diphenyl 1 picrylhydrazyl) radical scavenging activity, reducing power and superoxide dismutase(SOD)-like activity were increased in a concentration-dependent manner by both acorn extracts, and QAC showed highactivity in all antioxidant experiments (p<0.05). The inhibitory activities of α-glucosidase and α-amylase were alsoincreased in a concentration-dependent manner, and QAC showed higher inhibitory activity than QST (p<0.05). Our studyindicates that QST and QAC are functional food materials with high antioxidant and antidiabetic activities. In addition, QAChas a higher physiological activity than QST.
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KEYWORD
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Acorns, antioxidant activity, antidiabetic activity, quercus serrata thunb, quercus acutissima carruther
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