DPPH Radical ScaVenging Spectrophotometric
Assay. The DPPH radical scavenging activity of dried strawberry
was determined according to the method of Yen et al. (15). The DPPH
solution (1 mL) was added to 1 mL of centrifuged supernatant with 3
mL of ethanol. The mixture was shaken vigorously and allowed to
stand at room temperature in the dark for 10 min. The decrease in
absorbance was measured at 517 nm using a Shimadzu UV-2401 PC
spectrophotometer. Ethanol was used as blank. All determinations were
performed in triplicate. The results of the assay were expressed relative
to micromolar Trolox per 100 g of dry weight