FIG 4.

Treatment controls using only H₂O₂. Damage of GH activities susceptible to the Fenton reaction was assessed for some of the H₂O₂ concentrations used in the Fenton treatment (1, 15, and 60 mM). The values are shown as activities of treated samples (1, 15, and 60 mM H₂O₂) relative to untreated samples (0 mM H₂O₂) (means ± standard deviations; n = 3). Bars with the same lowercase letters in the same series are not significantly different (P > 0.05). Initial specific enzyme activities are embedded as units per milligram within the controls.