Research Article
Evaluation of In Vitro Cytoxicity and Genotoxicity of Size-Fractionated Air Particles Sampled during Road Tunnel Construction
Figure 3
Field emission scanning electron micrograph. Morphological characterization of particulate matter: (a) PM ø 2.5 μm, 10,000x; (b) PM ø 0.25 μm, 10,000x; bar 2 μm.