Effect of Properties of Silver Nanoparticles Coated with Polar Material and the Antibacterial Activity on Marine Pathogenic Bacteria

Figure 7

Antimicrobial activity of Ag NPs against marine pathogens. (a) The antibacterial activity of Ag NPs and Ag NPs-DNA conjugates against V. anguillus was determined by the Oxford cup method. The concentration of Ag NPs was 2.5 mM and the concentration of DNA samples was 1 μM. Ultrapure water was used as negative control and 75% ethanol as positive control. (b) The antibacterial activity of different concentrations of Ag NPs against V. anguillus. (c) The effect of 2.5 mM Ag NPs and 1 μM DNA or base on the growth curve of E. tarda. (d) Detection of the antibacterial effect of Ag NPs and Ag NPs-DNA conjugates on E. tarda using live bacteria counting method. The concentration of Ag NPs used in the experiment was 2.5 mM, and the concentration of poly-A sequence was 1 μM.

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