Figure 8From: Effect of MWCNT size, carboxylation, and purification on in vitro and in vivo toxicity, inflammation and lung pathology Representative photomicrographs in bright-field microscopy of the four in vivo MWCNT instillation conditions at day 7. A) vehicle-exposed. B) narrow/short-original MWCNT-exposed. C) wide/short-original MWCNT-exposed. D) narrow/long-original MWCNT-exposed. Black arrows indicate areas of particle retention. All images at 200x.Back to article page