Figure 3.

Quantitation of BAL cells in cytospins for assessment of carbon bridge formation between macrophages from 21 day SWCNT-exposed or carbon black (CB)-exposed rats. Each bar represents the mean ± SD of five animals. Ten fields were counted per animal and at least 500 cells per animal were counted. (A) Total cells/field, (B) Numbers of cells per field containing carbon inclusions, (C) Carbon bridges per field (only found in SWCNT-exposed rats), and (D) Mitotic figures per field.