Three-dimensional response surface plots.

<p>(A) enzyme amount (%wt) <i>versus</i> reaction time (min), (B) substrate molar ratio (mmole) <i>versus</i> temperature (°C), (C) enzyme amount (%wt) <i>versus</i> substrate ratio (mmole), and (D) enzyme amount (%wt) <i>versus</i> reaction temperature (°C) on percentage yield as response.