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S. mutans planktonic and biofilm cell growth absorbance values for NH and AH concentrations. The absorbance values of the 50% NH- and 50% AH-treated cultures as well as the 25% NH-treated culture were below 0.001. Horizontal lines, means and SEs of the TSB control; error bars, SEs; asterisks, significant differences (P ≤ 0.05) from the TSB control; boxed concentrations, significant difference between NH and AH groups for a specific concentration.
