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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Environmetrics. 2013 Dec 17;25(1):57–68. doi: 10.1002/env.2246

Figure 2. Fitted response surfaces for CuO, CoO, Al2O3, Mn2O3, ZnO, CeO2 ENMs.

Figure 2

Estimated smooth response surfaces of cellular membrane damage, as measured by Propidium Iodine (PI) uptake, as a function of log(dose) and time. The color red represents response values corresponding to lower time points and the color black represents response values corresponding to higher time points.