BACKGROUND Helicobacter pylori, which is associated with many upper gastrointestinal diseases, is found in half of the population of the world. Several special stains and immunohistochemistry stain for H. pylori are available. The need for and usefulness of immunohistochemical (IHC) technique has been debated for years. Toluidine blue is a simple stain for microbiological studies and is easily ...

a simple, rapid and sensitive method has been developed for determination of trances of tellurium (vi) (0.096-1.250 mg/ml) based on its catalytic effect on the reduction reaction of toluidine blue by sulfide ion at ph 4. the reaction is monitored spectrophotometrically by measuring the decrease in absorbance of the dyestuff at 628 nm by the fixed time method. the detection limit is 80 ng/ml and...

Cultured fibroblasts from the genetic mucopolysaccharidoses store higher than normal amounts of the polyanionic glycosaminoglycans (mucopolysaccharides); histochemical staining with the cationic dyes toluidine blue O and Alcian blue detects such intracellular accumulation. With these stains as phenotypic markers, correction of the cellular abnormality by fibroblasts derived from different patie...

Toluidine blue stain is used as a marker to differentiate lesions at high risk of progression in order to improve early diagnosis of oropharyngeal carcinomas. This study focused on 45 oral mucosal lesions in 32 patients (13 female, 19 male). In 9 cases, multiple biopsies were collected. Of the 45 lesions examined, 26 (57.0%) were defined clinically benign, while 19 (42.3%) were defined as suspe...

BACKGROUND Hematoxylin and eosin (H&E) is not an optimal stain to discriminate chief cells from parietal cells in gastric biopsies MATERIALS AND METHODS Fifteen sets of biopsies from the gastric corpus were consecutively stained with H&E and toluidine blue stains; chief cells stained deep blue with toluidine blue, thus contrasting with lightly-stained parietal cells. In well-oriented sections...

Hydrogen peroxide is an important mild oxidant which is widely used in various applications including remediation of waste waters and drinking water resources. The safe level of H2O2 residue has to be controlled through accurate and precise measurement methods. A facile spectrophotometric method for the determination of hydrogen peroxide is based on the reaction of iodine ...

Single crystalline MoO(3) and Cu(0.33)MoO(3) nanorods have been synthesized in large quantities via hydrothermal route, which exhibit unprecedented photocatalytic performance for the decomposition of Toluidine blue "O" (TBO) and chlorobenzene both under visible and UV light irradiation.

Fig. 1: Section of an RNase indicatorplate. After overnight incubation at 37°C an RNase secreting colony (left) showed pink halos against blue medium. An E. coli colony not secreting RNase is shown as a control (right). The lest agar contained toluidine blue O (SO mg/1, Merck, Darmstadt: FRG) and yeast RNA (2 g /1 , Boehringer, Mannheim; FRG) in solid LB medium (1.5 % Agar). RNA stock solution ...