Fig. 6. In vitro anti-biofilms effect of OHH NPs .The remaining
biofilms were quantified by crystal violet staining. Biofilms were
visualized by photographs (A) and biofilm biomass was determined by
measuring the absorbance of 590 nm. (B). (C) Confocal fluorescence
images of K.pneumoniae biofilms. (D) The corresponding
statistical histogram showing the relative biofilm level. The group was
used as the PBS, HMPB NPs(100 μg/mL), ofloxacin(10 μg/mL), OHH NPs (100
μg/mL) and OHH NPs + NIR(100 μg/mL).