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. Author manuscript; available in PMC: 2011 Feb 10.
Published in final edited form as: Nano Lett. 2010 Feb 10;10(2):484–489. doi: 10.1021/nl903264h

Figure 5.

Figure 5

Metabolic activity (A, Vybrant® metabolic activity assay kit) and cytotoxicity (B, Vybrant® cytotoxicity assay kit) of NIH/3T3 and HeLa cells after 24, 4.0, and 1.0 h incubations with various concentrations of Gd(III)-ND. Metabolic activity is represented as the percent fluorescence with respect to control cells (those incubated with media alone). Cytotoxicity is represented as the percent fluorescence with respect to lysed cells incubated with media alone. Control 1 are cells incubated with media alone and control 2 are cells incubated with 0.500 mg/mL NDs [no Gd(III)] for 24 h. All conditions were done in triplicate with error bars representing ± one standard deviation of the mean. 40 µM Gd(III) is equivalent to ~ 1.0 mg/mL Gd(III)-ND.