508968.fig.001a
(a)
508968.fig.001b
(b)
508968.fig.001c
(c)
508968.fig.001d
(d)
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.