The aim of this study was to evaluate the cytotoxicity of root canal irrigating solutions containing calcium hydroxide and sodium lauryl sulphate on fibroblasts derived from L929 cell line. Saturated calcium hydroxide aqueous solution (CH), sodium lauryl sulphate (SLS) and SLS associated with calcium hydroxide (HCT20) were diluted with sterile distilled water at 50%, 20%, 10% and 5% concentrati...

OBJECTIVE Application of sodium ascorbate as an antioxidant and calcium hydroxide as a buffering agent following intracoronal bleaching has been recommended. The aim of this study was to investigate the effect of using the mentioned materials on shear bond strength of composite resin to the bleached dentin. MATERIALS AND METHODS In this in vitro investigation, sixty human sound premolars were...

Two simple spectrophotometric methods were developed for the determination of cefprozil in pure bulk and in tablets forms. The first is a colorimetric method based on the coupling of cefprozil, after being hydrolyzed by sodium hydroxide (0.1N), with ascorbic acid as a chromogen (method A). It has been established that cefprozil reacts with ascorbic acid to form a 1:1 water soluble colored produ...

Materials. Ethylbromoacetate (97%), potassium carbonate (99%), diethyl ether (99.8%), ethylenediamine (99%), dichloromethane (99.6%), sodium triacetoxyborohydride (97%), sodium borohydride (98%), propionaldehyde (97%), poly(ethylene glycol) methyl ether thiol (PEG-SH, average mw 2000), formic acid (96%), formaldehyde (37% wt in H2O), sodium hydroxide(97%), propionaldehyde (97%), trifluoroacetic...

The goal of the present thesis was to study the possibilities of producing an aluminium hydroxide, which would easily dissolve in hydrochloric acid. Furthermore, the product should be easy to dewater. In the experiments, which were made batch-wise, a 50% sodium hydroxide was used to accomplish the precipitation. The precipitation of aluminium hydroxide is a dynamic process that depends on many ...