Skip to main content
Fig. 1 | Particle and Fibre Toxicology

Fig. 1

From: Lung carcinogenicity of inhaled multi-walled carbon nanotube in rats

Fig. 1

a MWNT-7 concentrations in the inhalation chambers during the 104-week experimental period. Concentrations of MWNT-7 particles in the inhalation chamber were monitored by the optical particle controller throughout each 6 h exposure period during the 104 weeks of the study. Mass concentrations (mg/m3) of MWNT-7 in the chambers was calibrated by multiplying the CPM by the mass per particle (see Methods for details). The target concentrations of MWNT-7 were 0.02, 0.2, and 2 mg/m3; panel A shows the measured concentrations of MWNT-7 aerosols in the chambers. b and c SEM images of MWNT-7 in the inhalation chamber. SEM images of MWNT-7 in the chamber are shown in panels b and c. The fibers shown in the figure were collected on a polycarbonate filter at 1-week and 102 weeks. The MWNT-7 aerosol was in the form of individual and fibers in all groups. Bar, 5 μm

Back to article page