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http://dx.doi.org/10.7783/KJMCS.2011.19.4.257

Antioxidant Activity and α-Glucosidase Inhibitory Effect of Jerusalem Artichoke (Helianthus tuberosus) Methanol Extracts by Heat Treatment Conditions  

Jeong, Hyeon-Ju (Department of Applied Plant Sciences, Kangwon National University)
Kim, Ju-Sung (Plant Resource Sciences and Environment, College of Applied Life Sciences, Jeju National University)
Sa, Yeo-Jin (Department of Applied Plant Sciences, Kangwon National University)
Kim, Myeong-Ok (Department of Applied Plant Sciences, Kangwon National University)
Yang, Jinfeng (Department of Applied Plant Sciences, Kangwon National University)
Kim, Myong-Jo (Oriental Bio-herb Research Institute, Kangwon National University)
Publication Information
Korean Journal of Medicinal Crop Science / v.19, no.4, 2011 , pp. 257-263 More about this Journal
Abstract
This study investigated the changes of antioxidant activity and ${\alpha}$-glucosidase inhibitory effect of Jerusalem artichoke (Helianthus tuberosus) 100% methanol extracts by various heat treatment. The contents of total phenolic and flavonoid compounds in methanol extract tended to increased gradually with the rise of temperature to 180$^{\circ}C$. The maximum yield of gallic acid (51.52 ${\pm}$ 2.17mg/g extract weight) and quercetin (13.39 ${\pm}$ 0.03mg/g extract weight) were obtained with extraction temperature of 180$^{\circ}C$ for 120min. In addition, the improving extraction efficiency resulted in the increased biological activities, such as electronic donation ability (EDA, 90.36${\pm}$ 0.57%), reducing power (Abs 1.14) and ${\alpha}$-glucosidase inhibitory effect (92.14 ${\pm}$ 1.14%). Overall, the results of this study indicate that the optimum conditions for the extraction process were an extraction temperature at 180$^{\circ}C$ for 120 min, and will provide the basis for future research on the improving extraction yield of phenolic and flavonoid compounds.
Keywords
HPLC Analysis; Antioxidant Activity; ${\alpha}$-Glucosidase Inhibitory Effect; Heat Treatment; Helianthus tuberosus;
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Times Cited By KSCI : 15  (Citation Analysis)
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