Figure 2From: Optimization of upstream and downstream process parameters for cellulase-poor-thermo-solvent-stable xylanase production and extraction by Aspergillus tubingensis FDHN1 Optimal pH (A) and pH stability (B) of the xylanase from A. tubingensis FDHN1. The influence of pH on xylanase activity was determined using 0.05Â M sodium citrate (pH 3.0 to 6.0), sodium phosphate (pH 6.0 to 8.0) and glycine-NaOH (pH 8.0 to 10) buffers. The pH stability was studied at a regular interval of 3 up to 24Â h.Back to article page