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Viability of HeLa cells after exposure to nanoparticles for (A) 24, (B) 48, and (C) 72 h treatment times. Nanoparticles exert their cytotoxicity in a time- and concentration-dependent manner to reduce viability of cancer cells. The lowest viability is observed after 72 h and exposure to HGP@Fe3O4 nanoparticles.
