Figure 5

High magnification TEM of MWCNT taken up by C57BL/6 alveolar macrophages 1.5 hr in vitro post-exposure (25 μg/ml). A) N/S-O (narrow/short-original) MWCNT-exposed AM at 30 K x. B) N/S-F (narrow/short-functionalized) MWCNT-exposed AM at 20 K x. C) W/S-O (wide/short-original) MWCNT-exposed AM at 15 K x. D) W/S-F (wide/short-functionalized) MWCNT-exposed AM at 15 K x. E) N/L-O (narrow/long-original) MWCNT-exposed AM at 17 K x. F) N/L-F (narrow/long-functionalized) MWCNT-exposed AM at 20 K x. Black spotted/speckled areas indicate areas of organized phagosomal particle retention in the cytoplasm of the macrophage cell.