693629.fig.005a
(a)
693629.fig.005b
(b)
Figure 5: The qualitative disc diffusion test of cotton treated with ZnO sol/chitosan composite for the growth inhibition of (a) E. coli and (b) M. luteus. Both photographs show the clear zone of inhibition around the sample impregnated with ZnO nanoparticles compared with ZnO sol/chitosan (with different MW) composite.