Fig. 8

Stacked retention fractions for three types of inhaled, 20-nm sized nanoparticles at each time point. Stacked fractions of three different NP in various secondary organs, tissues, blood, and cumulative excretion in urine over time p.e., respectively. a: [48V]TiO2-NP; b: [192Ir]Ir-NP; c: [195Au]AuNP. Panel d: blood concentrations of all three NP types over time p.e