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Antibacterial activity results. The introduction of copper into bioactive glass (zein/CuBG) determined a significant reduction of bacteria viability in comparison with both zein and zein/BG (a-b-c, p < 0.05, indicated by *). (d) SEM images showing the lack of evident biofilm aggregates on zein/CuBG coatings. Scale bar = 10 μm.
