Fig. 3From: Statistically optimized production and characterization of vanillin from creosol using newly isolated Klebsiella pneumoniae P27 a–c Contour plots and response surface plots for optimization of vanillin production by K. pneumoniae P27, showing the interaction effects of yeast extract, creosol and NH4NO3 on vanillin production. a Effect of yeast extract and creosol; b effect of NH4NO3 and creosol; c effect of NH4NO3 and yeast extractBack to article page