Figure 7
From: Inhalation of rod-like carbon nanotubes causes unconventional allergic airway inflammation
Concentrations and size distributions of CNT aerosols. a-d: normalized particle size distributions for rCNT experiments with the average concentration of 8.2 mg/m3(a) and 8.4 mg/m3(b). Control material (tCNT), with the average particle concentration of 17.5 mg/m3(c) and 18.5 mg/m3(d), was used to confirm that rCNT induced inflammatory reaction are truly rCNT-specific and biologically relevant. Parameters of individual log-normal fits: Dp, the mean diameter in relative units; f, the distribution frequency; σ, the geometric standard deviation. e,f: Particle concentration time series of two representative rCNT (e) and tCNT (f) experiments. Increase of the concentrations at 120 min is due to refilling of the FBAG reservoir. Bold lines represent means of four 4 h exposures performed on 4 consecutive days and colored areas present standard deviation (SD). In f, the red line represents a single 4 h experiment and hence SD is not shown.