Invited Speaker

Abstract: The antioxidant properties of the extract of saponin from Sapindus mukorossi (soapberry) was analyzed and optimized using Response Surface Methodology (RSM). In this study, the antioxidant properties were evaluated using different antioxidant tests. There are 1,1-di-phenyl-2-picryl-hydrazyl (DPPH) free radical scavenging, reducing power, and ferrous ion chelating. The best DPPH free radical scavenging ability was obtained in 91.56 % (X1 = 1 hour, X2 = 1:15 (w/v), X3 = 0.55 %). The effects of solid-liquid ratio (X2) and enzyme concentration (X3) on the response of percentage of free radical scavenging (Y1) was significant. The best reducing power was obtained in 0.473 Abs (X1 = 3 hour, X2 = 1:10 (w/v), X3 = 0.1 %). The effects of solid-liquid ratio (X2) on the response of amount of reducing power (Y2) was significant. The best ferrous ion chelating ability was obtained in 49.63 % (X1 = 1 hour, X2 = 1:10 (w/v), X3 = 1 %). The effects of time (X1) and solid-liquid ratio (X2) on the response of percentage of ferrous ion chelating ability (Y3) was significant. The extract of saponin from Sapindus mukorossi shows excellent in antioxidant capacity based on reducing power and scavenging free radicals activity, but it is relatively weak in ferrous ion chelating.

Biography: Dr. Tsair-Wang Chung received the B.S. degree in Chemical Engineering from Chung Yuan Christian University (CYCU), Taiwan in 1985, M.S. and Ph.D. degrees in Chemical Engineering from University of Missouri-Columbia, USA in 1991 and 1993, respectively. Currently, he is a principal investigator with the bioresource and biomass industrial technology. He has authored or co-author more than 200 research papers in refereed journals and conference proceedings. His current research interests include environmental sustainability, biomass technology, separation technology, and membrane system. Dr. Chung serves as the Dean of College of Engineering in CYCU and he served as the Dean of Industry-Academia Cooperation for two years and Dean of Research and development for five years. He received the Annual Excellent Technology Transfer Awards from 2010 to 2014, 2016 to 2018 in Chung Yuan Christian University and the First Grade Reward of the Talent Scholar from Ministry of Science and Technology, Taiwan.