Fig. 2

Whole lung burden and clearance of CoO and La₂O₃ nanoparticles. Lungs and associated lymph nodes from mice were analyzed by INAA for initial whole lung burden (1 h post exposure on day 4) and lung clearance (56 days post exposure) for CoO and La₂O₃ nanoparticles at 10 and 30 mg/m³. Values are presented as μg of nanoparticle per weight of lung. n = 5 male mice per group. *p < 0.05 represents significance between air control and CoO or La₂O₃ nanoparticle-exposed mice. # p < 0.05 represents significance between CoO and La₂O₃ nanoparticle-exposed mice