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Alcohol dehydrogenase (A) and acetate kinase (B) activities (μmol per min per mg of total cell protein) of lactic acid bacterial strains after growth (24 h at 30°C) in CDM which was supplemented with caffeic acid (
), p-coumaric acid (
), and ferulic acid (
) (2 mM). CDM not supplemented with hydroxycinnamic acids was used as the control (□). Data are shown as the means ± standard deviations of three independent experiments. *, significant difference (P < 0.05) from the control.
