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Antibacterial activity of the calcium alginate films without carbon nanofibers (control sample disk) (a) and calcium alginate/carbon nanofibers composite films (b) against multidrug-resistant Staphylococcus epidermidis by the agar disk diffusion test after 24 h of culture at 37 °C. The red arrow indicates the sample disk showing antibacterial “halo” and normalised widths (nwhalo) calculated with Equation (2) are shown for each image.
