The ABTS assay was performed according to the adjusted procedure of Pennycooke, Cox,and Stushnoff (2005): 5mM water stock solution of ABTS (25 ml) was prepared and 1 g of MnO2 was added as an oxidizing agent (to produce activated ABTS.+ radical). The mixture wasstirred and left for 20 min at room temperature. Afterwards, the MnO2 was removed through centrifugation and syringe-filter filtration (0.25 µm). The activated ABTS.+ stock solution was diluted in 5 mM phosphate buffer saline (pH 7.4) and adjusted to an absorbance ranging between 0.200 and 1.000, depending. On the nature of the assayed sample. The absorbance in a plastic cuvette 10 mm in length at t0 was recorded and an additional 10 µm of the sample were added, stirred and left to stand for 5 min. A decrease in a absorbance after 5 min was measured. The TAS was obtained as mentioned in formula (1) and standardized using the ABTS –ascorbic, as mentioned above.