Plasma-treated water (1.5 ml) was mixed with 50 mmol l-1 ethylbenzene and 50 or 100 nmol l-1 (0.075 or 0.15 nmol) free rAaeUPO. After 10 min incubation under rapid mixing, 150 µl sample was withdrawn for gas chromatography (GC) analysis. Means and standard deviations represent three independent experiments.