FIG. 2.

Change in log₁₀ counts per ml in bifidobacteria (Bif) and Eubacterium hallii (Ehal) groups, detected using the probes Bif164 and Ehal1469, in 24-h batch culture containing a mixture of polysaccharides (mix), lactate alone (lact), or the mixture of carbohydrates and lactate together (mix+lact) and incubated at three different pHs: 5.2 (open bars), 5.9 (dotted bars), and 6.4 (striped bars). Data were analyzed as two-way ANOVA with random effect for volunteer and fixed effect for substrate, pH, and their interaction. Error bars indicate standard errors of the means obtained from ANOVA. NS, not significant; different letters indicate statistically significant differences (P < 0.05).