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.
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(a)
345724.fig.003b
(b)