Development of antioxidant activity and pattern recognition of terminalia chebula retzius extracts and its fermented products

Abstract

This study was to determine the difference of antioxidant activities between unfermented extracts and fermented products for Terminalia chebula Retzius, and to recognize antioxidative patterns. The methanol extract, water extract, 95 % ethanol extract, fermented product of dried powder at 25 °C and fermented product of residues after 95 % ethanol extraction at 37 °C showed good antioxidant activities based the scavenging effect on 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) assay and the horseradish peroxidase (HRP)-luminol-hydrogen peroxide (H_2O_2) assay, respectively. The methanol extract, water extract, 95 % ethanol extract, fermented product of dried powder at 15 °C and fermented product of water extract at 25 °C exhibited a good value of antioxidant activity based on the pyrogallol-luminol assay. The antioxidative pattern plots revealed valuable information and showed good correlation between scavenging effect on DPPH radical assay and HRP-luminol-H_2O_2 assay. These results may represent promising plant-sources of medicine in the future.