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Dose-dependent reduction of viability of MCF-7 cells after nickel nanoparticle (Ni NP) exposure: (A) 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and (B) neutral red uptake (NRU) assay.
Notes: Data represented are mean ± standard deviation of three identical experiments made in triplicate. *Statistically significant difference as compared with the control (P<0.05).
