Figure 3From: The cytotoxicity of polycationic iron oxide nanoparticles: Common endpoint assays and alternative approaches for improved understanding of cellular response mechanismStability of 1)MNP-PEI (open marker) and 2) MNP-PEI-PEG (filled marker) in RPMI-1640 media of pH 7.2 (◇), pH 4.6 (○) and pH 4.6 containing sodium citrate (20 mM) (□). Study carried out using 2 mL, 100 μgmL-1 MNPs under sink conditions with stirring over 2wks (n = 3 ± SD).Back to article page