BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY, vol.48, no.2, pp.187-193, 2005 (SCI-Expanded)
In this study, some physiological conditions affecting the activity of xylanase enzyme produced from Trichoderma harzianum 1073 D3 were determined. In addition, stabilization of pH and temperature in liquid and semi-solid state cultivation media were investigated. It was concluded that for maximum xylanase activity incubation at 60 degrees C in an enzyme incubation medium with pH 5 that contained 1% xylan was appropriate. The stability studies showed that the enzyme was relatively stable in the pH range 3-7 and retained more than 50% of its original activity after four months.