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(A) Typical morphology of gram-negative E. coli captures of the tested samples for E. coli in the petri dishes after 24 h cultivation. (B) PA12/Cu2O 0.5 wt.%, (C) PA12/Cu2O 1.0 wt.%, (D) PA12/Cu2O 2.0 wt.%, (E) PA12/Cu2O 4.0 wt.%, (F) PA12/Cu2O 6.0 wt.% [83].
