Figure 1

Aerosol characterization. A. The total aerosol number concentration was determined in parallel by two measuring devices (FMPS and a miniDiSC) for experimental runs with 22, 45 and 90 sec ZnO production (dataset averaged over a 10 sec interval). The cell cultures were exposed to the airborne particles for 30 min (1800 sec). Shortly after this timespan, the glove box chamber was flooded with fresh, pressurized air to clean the atmosphere (air exchange), resulting in an accelerated decay of particle number (disturbed system). B. Contour plot illustrating the temporal variation of particle size distribution (measuring range from 5.6 to 560 nm) in the 22 sec scenario shown in part A. Number concentration ≤ 1E4 pt/ccm is indicated in blue (baseline). Particle size is expressed as electrophoretic mobility diameter. Measurements were performed with a 1 sec resolution.