2.2.2. Flow cytometry
Scattering properties of silver-containing bacteria were measured using a CytoFlex S flow cytometer (Beckman Coulter). The bacterial mixture was transferred to the sheath fluid with a bacterial concentration of 105 mL-1 for flow cytometry. Next, with the laser beam passing the bacteria in the fluid, both forward scattering and side scattering signals of those bacteria were detected and analysed. In addition, specific concentrations of bacteria in a solution were measured by flow cytometry.