Effect of C/N Ratio and Media Optimization through Response Surface Methodology on Simultaneous Productions of Intra- and Extracellular Inulinase and Invertase from Aspergillus niger ATCC 20611

Figure 3

Response surface showing the interaction between five parameters and biomass (mg/mL); (a) sucrose and NaNO₃, (b) sucrose and Triton X-100, (c) yeast extract and Zn⁺², (d) NaNO₃ and Triton X-100. Other variables are constant at their center points. The numbers inside the contour plots indicate conversion yield (mg/mL) of the biomass.

(a)

(b)

(c)

(d)