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hFOB-bacteria co-cultures. Only zein/CuBG coatings were able to preserve the initial number of cells (a-c, 2 × 104, starting number indicated by the dashed lines); results were significant for all the tested strains (a-c, zein/CuBG vs zein or zein/BG, p < 0.05, indicated by *). Representative SEM images (d) of hFOB-aureus culture showing high biofilm contamination for zein/BG but normal cells for zein/CuBG coatings.
