Abstract
The free radical scavenging activities of puerarin towards nitrogen dioxide radicals (NO ˙2 ), nitric oxide radicals (NO˙) and hydroxyl radicals (OH˙) were investigated by pulse radiolysis. Puerarin reacted with (NO ˙2 ) or (NO˙) to form puerarin-4-O˙ with the absorption maximum at 340 nm, but reacted with OH˙ to form at least three transient species including puerarin-2-O˙, puerarin-4-O˙ and [puerarin-OH]˙with a broad absorption spectrum band (300-750 nm). In addition, the reaction rate constants of puerarin reacting with NO ˙2 , and NO˙ were determined as 2.6 × 108, 1.7× 108 and 3.9 × 109 L · mol−1 · s−1, respectively.
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Yaping, Z., Wenfeng, W., Wenli, Y. et al. Pulse radiolysis study on the free radical scavenging activities of puerarin. Sc. China Ser. B-Chem. 46, 132–136 (2003). https://doi.org/10.1360/03yb9019
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DOI: https://doi.org/10.1360/03yb9019