highly significantp = 0.001
As for maximum biosurfactant productivity, Y 2 , which indicates the effectiveness of the microbe to produce high concentrations of biosurfactant in the shortest period of time, proved that the quadratic model was highly significant ( p = 0.001) in which there was only a 0.01% probability that such a large model F value could be generated due to noise ( supplementary data: Table S2 ).