Figure 6. HCO₃ ⁻ but not pH exhibits bactericidal capacity in vitro.

(A). The activity of E.coli was inhibited by 80 mM HCO₃ ⁻ and 50 mM HCO₃ ⁻. (B) Insignificant effect on bacterial activities of varied pH (at constant 25 mM HCO₃ ⁻) at 7.35, 7.95, 8.14 and 8.24 which was corresponding with the pH value of different concentration of HCO₃ ⁻. Data were from three experiments. (**P<0.01vs 0 mM HCO₃ ⁻, ^$$$p<0.001 vs 25 mM HCO₃ ⁻, ^##P<0.01vs 50 mM HCO₃ ⁻, ^&P<0.05 vs 25 mM HCO₃ ⁻).