Biological Impact of Exposure to Extremely Fine-Grained Volcanic Ash

Figure 4

Morphology of A549 cells with different ash concentrations: (a) cells; (b) cells with 80 µg/cm³; (c) cells with 320 µg/cm³; (d) cells with 1280 µg/cm³; (e) cells with titanium oxide (TiO₂, positive control). Images are representative of all samples. Scale: 100 μm.

(a)

(b)

(c)

(d)

(e)