Fig. 6

pH changes of Lactobacillus curvatus (Arla-10) (a), Enterococcus faecium (JFR-1) (b), Lactobacillus paracasei subsp. paracasei (JFR-5) (c), and Streptococcus thermophilus (TSB-8) (d) grown under different growth conditions. (●) MRS, pH 6.2, 37 °C; (○) MRS, pH 6.2, 44 °C; (■) MRS, pH 7.4, 37 °C; (□) MRS, pH 7.4, 44 °C; (▲) BHI, pH 5.5, 37 °C; (Δ) BHI, pH 5.5, 44 °C; (▼) BHI, pH 6.2, 37 °C; (▽) BHI, pH 6.2, 44 °C. The experimental data were fitted to the logistic model. The vertical bar represents standard errors of the means