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. 2015 Aug 14;10:326. doi: 10.1186/s11671-015-1029-6

Fig. 1.

Fig. 1

Histopathological observation of lungs of mice after nasal administration of TiO2 NPs for 6 months (n = 5). TiO2 NP-exposed mice show infiltration of inflammatory cells (green arrow) and bleeding (yellow arrow) in the lung