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Cell surface hydrophobicity of Streptococcus mutans UA159 strains. The bacterial suspensions (1.2 ml) were mixed with 0.6 ml of hexadecane. Adsorption was calculated as the percent loss in OD of the aqueous phase relative to that of the initial cell suspension. Error bars represent standard deviations. ***, P < 0.001; one-way ANOVA.
