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. 2019 Nov 25;7(4):59. doi: 10.3390/toxics7040059

Figure 2.

Figure 2

Figure 2

(a) Particle size distribution (dN/dLogDp, #/cm3) of second-hand aerosol generated by vaper A and vaper B (averaged for all the experiments); (b) Particle size distribution temporal evolution (dN/dLogDp, #/cm3) corresponding to particle number concentration trend reported in Figure 1 (vaper A).