... of the DPPH standard solution of 90 and 78%, respectively, at a concentration of 100 μg/ml, and IC50values of 2.71 and 2.91 μg/ml. These valueswere slightly greater than that of the positive ... products as a potentialsource of new pharmacophores a theory of memory. Pure Appl Chem2001, , 73: 555-560.35. Sander CS, Chang H, Hamm F, Elsner P, Thiele JJ: Role of oxidative stress and the antioxidant ... employed: 1.5 ml of phosphate buffer 50 mMpH = 7.2, containing 0.26 mM of 5,5’-dithiobis-2 - nitro-benzoic acid (DTNB), 10 μl of human plasma and 10 μl of the tested compound (1, 10 and 100 μg/ml...