Additional file 1 of Pulmonary dust foci as rat pneumoconiosis lesion induced by titanium dioxide nanoparticles in 13-week inhalation study

Additional file 1: Fig. S1. The whole body inhalation exposure system using in this study. The whole body inhalation exposure system (A). The averaged TiO2 NP concentration in the chamber for each exposure day (B). Representative scanning electron microscope (SEM) images of the TiO2 NPs in the chambers (C). The particle size distributions for the various exposure concentrations (D). Cumulative frequency distribution graphs with logarithmic probability (E). Mass median aerodynamic diameter (MMAD) and geometric standard deviation (σg) in the chamber (F). Scale bar: 20 μm, Yellow scale bar: 4 μm (panel C)