Figure 5. Cytotoxicity of AgNPs, PVP, and AgNPs-PVP.A-C) Cell viability of PC-12 after incubating with different concentrations of AgNPs, PVP, and AgNPs-PVP, at 24 and 48 hours. Culture of PC-12 without any exposure to AgNPs, PVP, or AgNPs-PVP was considered 100% cell viability. Error bars represent standard deviations. n = 4 for each group.