Figure 3

Live /Dead BacLight viability results and fluorescence images.
(A) The survival rates of E. coli with different treatments () nanoparticles (20 ppm) treated, (
) Catechin (20 ppm) treated and (
) Control. (B) The survival rates of S. aureus with different treatments (
) nanoparticles (10 ppm) treated, (
) Catechin (10 ppm) treated and (
) Control. The error bars indicate standard deviations. The representative fluorescence images of E. coli (top row) and S. aureus (bottom row) by different treatments. (C) Fluorescence image of E. coli treated with Catechin-Cu nanoparticles (20 ppm). (D) Fluorescence image of E. coli treated with Catechin (20 ppm). (E) Fluorescence image of S. aureus treated with Catechin-Cu nanoparticles (10 ppm). (F) Fluorescence image of S. aureus treated with Catechin (10 ppm). E. coli and S. aureus all stained by the live/dead staining kit. The green and red fluorescence images are overlaid to one picture for better comparison of living and dead cells.