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http://dx.doi.org/10.3746/jkfn.2013.42.11.1776

Effects of Extraction Temperature and Time on Antioxidant Activities of Rhus verniciflua Extract  

Park, Hye Jin (Dept. of Food Science and Technology, Chungbuk National University)
Yoon, Gun Mook (Dept. of Food Science and Technology, Chungbuk National University)
Lee, Sang Hoon (Dept. of Food Science and Technology, Chungbuk National University)
Jang, Gwi Yeong (Dept. of Food Science and Technology, Chungbuk National University)
Kim, Min Young (Dept. of Food Science and Technology, Chungbuk National University)
Meishan, Li (Dept. of Food Science and Technology, Chungbuk National University)
Lee, Junsoo (Dept. of Food Science and Technology, Chungbuk National University)
Jeong, Heon Sang (Dept. of Food Science and Technology, Chungbuk National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.42, no.11, 2013 , pp. 1776-1782 More about this Journal
Abstract
Rhus verniciflua was extracted at different temperatures and times, and the extracts were evaluated for contents of total phenolics and flavonoids, and antioxidant activities using DPPH and ABTS radical scavenging activities. Extraction temperatures and times were 80, 100, 120, 140 and $160^{\circ}C$, and 1, 3 and 5 hr. The total phenolic and flavonoid contents as well as antioxidant activities by DPPH and ABTS increased as the extraction temperature increased. The total phenolic contents did not significantly increase at less than $100^{\circ}C$ with different extraction times. However, they were increased at 3 hr and decreased at more than $120^{\circ}C$. The total flavonoid contents reached a high value of 8.04 mg CE/g at $140^{\circ}C$. The antioxidant activity by DPPH increased as the extraction temperature increased and reached high values of 34.28 mg TE/g at $140^{\circ}C$. The total antioxidant activity by ABTS was similar to DPPH. These results presumed that the optimum extraction temperature and time in the process of Rhus verniciflua extraction are $140^{\circ}C$ for 3 hr.
Keywords
Rhus verniciflua; extraction temperature and time; polyphenol; flavonoide; antioxidant activity;
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Times Cited By KSCI : 10  (Citation Analysis)
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