Five metal ions(Cu2+,K+,Fe2+,Mg2+,Fe3+) and EDTA were added to the laccase-bamboo treatment system.Reactive oxygen species(ROS) was detected in laccase-catalyzed oxidation of bamboo powder by electron spin resonance(ESR) spectra.The effects of five metal ions and EDTA on ROS relative strengths were investigated so as to choose proper activator to improve the relative intensity of free radical intermediates and thus to enhance the adhesion between bamboo particles when particleboard was made.Result shows tha...