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. 2017 May 24;7:2334. doi: 10.1038/s41598-017-02452-2

Figure 4.

Figure 4

Antibacterial tests (colony forming units and diffusion inhibition zones) for different membranes. Gram-negative E. coli (a) and Gram-positive B. subtilis (b) were used as the model bacteria. The symbol “*” stands for below detection limit.