Research Article
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.
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