Figure 4
Evaluation of the minimum inhibitory concentrations (MICs) using the redox resazurin dye-based microtiter broth dilution assay. 1 × 105 cfu/mL bacteria were exposed to doubling concentrations of nanocomposites. (a) SWCNTs-Ag without resazurin. (b) SWCNTs-Ag with resazurin. (c) pSWCNTs-Ag without resazurin. (d) pSWCNTs-Ag with resazurin. All the plates were incubated at 37°C and the optical density at 600 nm (OD600) was determined after 24 h. All values were considered to be significant at p ≤ 0.05 or 0.01 versus the controls (0 μg/mL of SWCNTs-Ag present in bacterial culture). **p ≤ 0.01 indicating highly significant differences. Error bars represent standard deviations determined from at least six replicates.