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 1

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

(a)

(b)

(c)

(d)