Comparison of three strip-type tests and two laboratory methods for salivary buffering analysis.

This study evaluated the correlation between three strip-type, colorimetric tests and two laboratory methods with respect to the analysis of salivary buffering. The strip-type tests were saliva-check buffer, Dentobuff strip and CRT(®) Buffer test. The laboratory methods included Ericsson's laboratory method and a monotone acid/base titration to create a reference scale for the salivary titratable acidity.

Protein buffering in model systems and in whole human saliva.

The aim of this study was to quantify the buffer attributes (value, power, range and optimum) of two model systems for whole human resting saliva, the purified proteins from whole human resting saliva and single proteins. Two model systems, the first containing amyloglucosidase and lysozyme, and the second containing amyloglucosidase and alpha-amylase, were shown to provide, in combination with hydrogencarbonate and di-hydrogenphosphate, almost identical buffer attributes as whole human resting saliva. It was further demonstrated that changes in the protein concentration as small as 0.

Improved Ruthenium II tris (bathophenantroline disulfonate) staining and destaining protocol for a better signal-to-background ratio and improved baseline resolution.

In proteomics the ability to visualize proteins from electropherograms is essential. Here a new protocol for staining and destaining gels treated with Ruthenium II tris (bathophenantroline disulfonate) is presented. The method is compared with the silver-staining procedure of Swain and Ross, the Ruthenium II tris (bathophenantroline disulfonate) stain described by Rabilloud (Rabilloud T.