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Bacterial enumeration of the 24 h Escherichia coli culture exposed to PVA nanocomposite film containing various copper content: (a, b) PVA/TNFC-Cu0.4, (c, d) PVA/TNFC-Cu0.5, and (e, f) PVA/TNFC-Cu0.6 films for 1 week at room temperature. (a–f) Representative Petrifilm count plates for various dilutions.
