Fig. 8From: Comparative carcinogenicity study of a thick, straight-type and a thin, tangled-type multi-walled carbon nanotube administered by intra-tracheal instillation in the ratSEM images of (a) MWCNT-A and (b) MWCNT-B after dissolution of the lung tissue. a shows individual primary, thick straight MWCNT-A fibers. b shows an agglomerate comprised of thin tangled MWCNT-B fibers (see Fig. 1 in [21] for definitions of agglomerates and aggregates)Back to article page