The reaction rate constants (k3) of scavenging O2 of 12 species of flavonoids were determined by Chemiluminescene(CL) ,taking the X-XOD system to produce O2 and luminol as a promoter,which located in the range of 10-6-10-6mol/L-1sec-1. The relationship between the structure of flavonoids and their scavenging activity on O2 was analyzed taking k3 as comparing indexes. At the same time,the inhibition rates of these flavonoids at 1mmol/L to · OH produced by Vc-H2O2-Cu2+-yeast-polysaccarides were also measured ...
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