Zn uptake by mussels exposed to ZnO ENPs.

<p>Mean rate of Zn uptake by dry weight into somatic tissue ±1 SE for small (black) and large (gray) mussels exposed to ZnO ENPs for 12 wk. Zn accumulation rate did not vary as a function of ZnO ENP concentration in small mussels (OLS: <i>Zn rate</i> = 7.37+2.98×10⁻³(<i>Concentration</i>), r²<0.0001) but increased as a function of ZnO ENP concentration in large mussels (OLS: <i>Zn rate</i> = 1.00+9.46(<i>Concentration</i>), r² = 0.58).