Concordance between antioxidant activities in vitro and chemical components of Radix Astragali (Huangqi).

Five Radix Astragali (RA) extracts were prepared and their antioxidant activities were measured in vitro using ABTS [2, 2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid diammonium salt)], DPPH · (1,1-diphenyl-2-picrylhydrazyl radical), reducing power, •O₂⁻ and •OH assays. Their chemical contents were then determined, including total phenolics, total… CONTINUE READING