The definition of enzyme activity unit：under the condition of 37℃，pH 5.5，the amount of enzyme needed to degrade from the xylanse  solution of 5 mg/ml concentration and release 1μmol of reducing sugar in 1 minute is one enzyme activity unit (U).

In different disposal time under 85℃，the remaining relative activity contrast between granular and powder xylanase

Under different temperature of disposal for 10 minutes，the remaining relative activity contrast between granular and powder xylanase

 

The granular xylanase and premix coexist for different time，its remaining relative activity

The contrast of activity variance quotient between granular and market sales powder xylanase in different granularity of different products