Use of remazol blue dyed avicel for the determination of cellullolytic activity in basidiomycetes

A modified method for direct determination of cellulolytic activity using Avicel colored with Remazol Brilliant Blue R (RBBR) in Agar test tubes in discussed. Refinaments were introduced in a simple method for qunatitation of cellulase activity, based on the release of dye from Avicel-RBBR medium by enzimatic hydrolysis. Modification in Avicel-dye preparation were enhanced and a spectrophotometer improved the precision of the collected data, since absorbance measurements could be done at the maxmum wavelenght for RBBR (595 nm).