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Statistical analysis of the interaction of polystyrene NPs with the mucin layer at (a) pH 5 and (b) pH 7 measured by quartz crystal microbalance with dissipation technology. Data are presented as mean ± SD (n = 3). One-way ANOVA followed by Tukey–Kramer multiple comparison post-test. * p < 0.05; ** p < 0.01 and *** p < 0.001 vs. control.
