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. 2016 Dec 12;6:38973. doi: 10.1038/srep38973

Figure 5. Antibacterial effect of the paeonol-coated PDMS surface to other surfaces by contact.

Figure 5

(a) E. coli DH5α were seeded onto the agar bacteria culture plate. A disk of paeonol-coated PDMS was put onto the plate with the paeonol side towards the plate. The growth of bacteria beneath the paeonol-coated PDMS surface was measured by the number of bacteria colony forming units (CFU). (b) Fluorescent images of bacterial growth beneath the paeonol-coated PDMS surface under various experiment conditions. (c) Influence of paeonol-coating concentration on the growth of bacteria. (d) Antibacterial effect of the paeonol-coated PDMS surfaces on the contacting surface against rinsing. The paeonol-coated PDMS surfaces were rinsed with 1–3 times with water. (e) Antibacterial effect of the paeonol-coated PDMS surfaces on the contacting surface after incubation in water for 1 to 4 hours. At least three experimental repetitions were carried out for each data point. The difference between sample groups and the control group was tested by Student’s t-test (*0.01 < p < 0.05, **0.001 < p < 0.01). The length of scale bar is 100 μm.