Antioxidant Activity of Water-soluble Extracts from Kalopanacis cortex
2013
Yang, H.S., Pukyong National University, Busan, Republic of Korea | Lee, Y.B., Pukyong National University, Busan, Republic of Korea | Yoo, B.J., Gangnung-Wonju National University, Gangwon, Republic of Korea
In this study, we established the optimal conditions for obtaining water-soluble extracts with antioxidant activity from Kalopanacis cortex. The extraction conditions tested included cold treatment, extraction time (1, 5, 10, 15, and 24 h), and extraction temperature (55, 75, and 95oC). The highest total polyphenol compound content from water soluble extracts (612 mg/mL) was obtained at 95oC for 15 h after cold treatment. The 1,1-diphenyl- 2-picrylhydrazyl (DPPH) free radical scavenger activity was also highest (78.8%) under these conditions, which was comparable to 70.2% of ascorbic acid. The hydroxyl radical scavenging activity (HRSA) was also highest (69.0%) under these conditions, stronger than 56.6% of ascorbic acid. These results may provide critical evidence supporting the use of Kalopanacis cortex as a source of antioxidants in functional foods.
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