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Physicochemical properties of IONP-Neu-PSA. (a) Hydrodynamic sizes in 20 mM and (b) Zeta potentials of IONP, IONP-Neu, IONP-Neu-PSA. (c) TEM image of IONP-Neu-PSA. (d) Serum stability of IONP-Neu-PSA, characterized by incubating IONP-Neu-PSA in 10% FBS (v/v) supplemented cell culture medium at 37°C for 125 hrs and measuring hydrodynamic size of IONP-Neu-PSA over time. There is no significant change in size data over time as characterized by the two-tailed student’s test (p > 0.05).
