Fig. 1

Particle size distributions of airborne ZnO concentrations at 0.5, 1.0 and 2.0 mg/m3. In addition, the error bars of each individual size channel are shown
Particle size distributions of airborne ZnO concentrations at 0.5, 1.0 and 2.0 mg/m3. In addition, the error bars of each individual size channel are shown