Figure 1

Assessment of BEAS 2B cell viability after exposure to silica particles. Cell viability assessed by the Trypan blue exclusion assay of cells exposed to cristobalite (A) and amorphous silica particles (B) for 24 h. Results are expressed as the mean percent viable cells ± SEM compared to unexposed controls and are representative of 3 independent experiments (N = 3 for each group in each experiment). ^a denotes the surface area concentrations expressed as (x10⁶μm²/cm²) and ^b denotes the respective mass concentrations of particles used (μg/cm²). Concentrations presented are represented by surface area for all other figures and tables.