Fig. 4

A Representative fluorescence image after Cy5-labeled free PBNPs solution and Cy5-labeled PBNPs@OBG hydrogel were injected into disc sites using IVIS over time. B Inhibition zones of the OBG and PBNPs@OBG on S. aureus and E. coli after 12 and 36 h using agar diffusion test. C Quantitative analyses of free PBNPs and PBNPs@OBG group tests via IVIS. D Inhibition zone diameters for S. aureus and E. coli in the OBG and PBNPs@OBG groups (n = 3, *P < 0.05, **P < 0.01, ns: not significant)