Figure 2
From: Extrapulmonary transport of MWCNT following inhalation exposure
Enhanced dark-field images of tissue sections from tracheobronchial lymph nodes 1 and 336Â days after MWCNT inhalation exposure. As typified by the micrograph, at 1Â day post-exposure singlet MWCNT fibers were observed scattered throughout sections of lymph nodes. However, 336Â days post-exposure, numerous dense concentrations of MWCNT fibers were found within the lymph nodes. MWCNT fibers are bright white in these enhanced darkfield images due to scattering of light by MWCNT, while cell nuclei are brownish red and other tissue elements are green.