Fig. 4From: Improved production of Bacillus subtilis cholesterol oxidase by optimization of process parameters using response surface methodologySurface and contour plots showing the interaction between cholesterol degradation (%) by B. subtilis versus A cholesterol (g/l) and inoculum size (%), B cholesterol (g/l) and magnesium sulphate (g/l), and C inoculum size (%) and magnesium sulphate (g/l)Back to article page