Figure 8
A cellular determination of surface iron concentrations and corresponding reactive oxygen species generation by each of the asbestos mineral types. (A) Ionizable iron concentrations measured by ICP-OES following treatment of the samples with 3.0 N HCl (B) Surface chelatable iron concentrations measured by ICP-OES following treatment of the samples with citrate-bicarbonate-dithionite (CBD) (C) Spectrophotometric assay measuring the thiobarbituric acid-reactive products of deoxyribose as a measure of hydroxyl radical production. Significant difference between the LA and amosite samples are denoted with (*). Significant difference between the two LA samples or between the two amosite samples denoted with (#). Differences are considered significant if p < 0.05.