نتایج جستجو برای: potassium dichromate
تعداد نتایج: 77815 فیلتر نتایج به سال:
The structure of potassium dichromate (P , Z = 4) consists of two layers parallel to (001), between which no crystallographic symmetry relation exists. These layers are nearly coincident with each other when rotated through 90° about c*. One question remained unanswered: do the crystals grow parallel to {001} with d(002) or d(001) layers? The pseudo-fourfold axis does not run parallel to a crys...
. The absorbances of five concentrations of potassium dichromate in 0.001 ]l.f perchloric aCid have been determined at eight wavelengths in the ultraviolet on the National Bureau of Standards Institute for Materials Research high-accuracy spectrophotometer. Four of the wavelengths-235, 257, 313, and 3.50 nm-correspond to absorbance maxima or minima in the HCrO,spectrum and are useful wavelength...
Attempts to improve formulation of topical products are a continuing process and the development of microandnanovesicular systems as well as polymeric microparticles has led to marketing of topical drugs and cosmetics usingthese technologies. Encapsulation of some well-known contact allergens in ethanolic liposomes have been reportedto enhance allergenicity compared with the all...
Hexavalent chromium is an environmental contaminant which may be associated with reproductive abnormalities in male rats. In the present study, we examined the effect of hexavalent chromium on male reproductive function of rats. Male Wistar rats received a daily intraperitoneal injection of potassium dichromate (1 or 2 mg/kg body weight) for fifteen consecutive days. A decrease in testis weight...
Hexavalent chromium [Cr(IV)], a well-known industrial waste product and an environmental pollutant, is recognized as a human carcinogen. But its mechanisms of carcinogenicity remain unclear, and recent studies suggest that DNA methylation may play an important role in the carcinogenesis of Cr(IV). The aim of our study was to investigate the effects of Cr(IV) on cell cycle progress, global DNA m...
BACKGROUND Data regarding occupational contact dermatitis (OCD) and its effect on quality of life (QOL) in India are limited. OBJECTIVES/AIMS To evaluate patients with OCD and record the outcome of treatment. PATIENTS/MATERIALS/METHODS All patients with OCD were evaluated for severity of disease (by the use of physician global assessment) and its effect on QOL (by use of the Dermatology Lif...
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