The food enzyme has been characterised regarding its activity depending on temperature and pH. The
xylanase is active at temperatures up to 80 °C (with an optimum of 60 - 70 °C at pH 6.0) and within a
pH range of 3 to 8 (with an optimum of pH 3 - 4 at 37 °C). The thermo-stability of the food enzyme
was tested over the range of 25 °C to 90 °C after a pre-incubation at the different temperatures at pH
6.0 for 30 minutes. The activity itself was measured under standard conditions. The food enzyme
shows 50 % residual activity at 60 - 65 °C after 30 minutes incubation and above 80 °C, no enzyme
activity remains after 30 minutes.