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. Author manuscript; available in PMC: 2019 Jul 30.
Published in final edited form as: Colloids Surf B Biointerfaces. 2018 Jun 30;170:673–682. doi: 10.1016/j.colsurfb.2018.06.050

Fig. 1.

Fig. 1.

Physicochemical characterization of 100 nm PS nanoparticles in calcium solutions. (a) Hydrodynamic diameters of PS-COOH and PS-PEG nanoparticles in varying concentrations of aqueous calcium chloride solutions as measured by DLS (n = 3). (b) Hydrodynamic diameters of PS-COOH and PS-PEG nanoparticles in varying concentrations of magnesium chloride solutions as measured by DLS (n = 3). All values are reported as mean ± SEM. Significance as compared with 0 mM condition are indicated by * p < 0.033, ** p < 0.002, *** p < 0.001.