FIG. 2.
Oxidation of four PAH (25 μM each) by laccase (4 U/ml) and the para-substituted phenols (1 mM) 4-methoxyphenol (MePhe) (Eox, 0.54 V versus NHE), 4-fluorophenol (FlPHe) (0.76 V), phenol (Phe) (0.79 V), 4-chlorophenol (ChPh) (0.8 V), 4-bromophenol (BPh) (0.82 V), HBA (0.9 V), 4-hydroxyacetophenone (HAP) (1.0 V), 4-hydroxybenzonitrile (HBN) (1.12 V), and 4-nitrophenol (NPhe) (1.22 V) with respect to their redox potentials (24). The oxidation by laccase without phenols is indicated by dashed lines. Results are means and standard deviations.