Effect of dilution on carboxymethylcellulase and xylanase assays

Use of a modified cupric acetate method for the detection and quantitation of xylanolytic activities: a comparative study with the congo red method

A modified cupric acetate method for the screening and quantitation of xylanolytic activities was comparable with the more widely used congo red method with respect to sensitivity and ease of use and was shown to have points of merit over the latter. The use of a non-linear correction, in comparison to the conventional linear one, for the effect of dilution on the quantitative plate assay was evaluated.

Adaptation of the Nelson-Somogyi reducing-sugar assay to a microassay using microtiter plates

The Nelson-Somogyi assay for reducing sugars was adapted to microtiter plates. The primary advantages of this modified assay are (i) smaller sample and reagent volumes, (ii) elimination of boiling and filtration steps, (iii) automated measurement with a dual-wavelength scanning TLC densitometer, (iv) increased range and reproducibility, and (v) automated colorimetric readings by reflectance rather than absorbance.