Figure 2.
Antioxidant activity by spectrophotometric methods: (a) 2,2-diphenyl radical method (DPPH); (b) Trolox equivalent antioxidant capacity (TEAC); (c) cupric reducing antioxidant capacity (CUPRAC); (d) Oxygen Radical Antioxidant Capacity (ORAC). Concentrations were expressed as fresh weight (FW). Different letters in each sub-figure indicate the presence of statistically significant differences according to the Tukey’s multiple range test (p ≤ 0.05; n = 9).