Growth inhibition of E. coli strains by exogenous (−)-α-bisabolol. a Time course of growth profile. b CFU measurement. Cells were grown in LB liquid medium and different amounts of (−)-α-bisabolol were added at the beginning of cultivation. Samples were taken for measurement of optical density at 600 nm (OD600). Samples for CFU measurement were taken at early stationary phase (indicated by an arrow). Mean values of two independent experiments are given for the CFU measurement