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Cell viability of (a) HeLa cells and (b) Caco-2 cells in PF/HA-QtN#AgNPs and free QtN at 0.1 to 0.6 µg/0.1 mL concentrations (means ± SDs, n = 3). Significant variances associated with the control (free QtN) are denoted by ** (p < 0.05) and *** (p < 0.005), as estimated by the ANOVA test.
