A hydroxyl radical differs from the other used free radicals in being
one of the most reactive radical formed naturally in biological systems
(Cheng, Ren, Li, Chang, & Chen, 2002). The radical scavenging
activities and the reducing power of anthocyanidins and anthocyanins
are shown in Table 2. Results are expressed in both, the
percentage activity and trolox equivalent. The final concentrations
of the assayed compounds in each test experiment (30.0, 10.0 and
10 lM in % DPPH, ABTS and OH assays respectively) were chosen
so that the anthocyanidin and anthocyanin activities varied over