“…The reducing power ability of the extract was determined using the method of Adesegun et al, [13] by mixing 2.5 mL of extract solution of various concentrations (25,50,75, 100, 150, 200, 250, 300, 400, 600, 800 μg mL -1 ), with 2.5 mL of 1 % potassium ferricyanide and incubated at 50 o C for 20 min. Trichloroacetic acid (2.5 mL, 10 %) was added and centrifuged (1000 × g, 10 min).…”