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Fig. 1 | Particle and Fibre Toxicology

Fig. 1

From: Road tunnel-derived coarse, fine and ultrafine particulate matter: physical and chemical characterization and pro-inflammatory responses in human bronchial epithelial cells

Fig. 1

Hydrodynamic size distribution based on the relative mass of coarse, fine and ultrafine PM sampled in the Marienborg and Hell tunnels. A Marienborg PM, dry road surface conditions; B Marienborg PM, humid road surface conditions; C Hell PM, dry road surface conditions; D Hell PM, humid road surface conditions. The hydrodynamic size distributions were determined by the Disc centrifugation method, as described in “Materials and methods”, from representative analyses

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