Here we report the results of dissociative electron attachment (DEA) to gas-phase chromium(0) hexacarbonyl (Cr(CO)6) and benzene-chromium(0) tricarbonyl ((η6-C6H6)Cr(CO)3) in the energy range of 0-12 eV. Measurements have been performed utilizing an electron-molecular crossed beam setup. It was found that DEA to Cr(CO)6 results (under the given experimental conditions) in the formation of three...

Thionitrosyl Complexes, Nit rosy 1 Chromium Complexes A nitromethane solution of NS+PFe-, obtained in situ from N3S3CI3 and AgPF6 (1:3), reacts with benzene tricarbonyl chromium in acetonitrile solution to give the thionitrosylcontaining salt [Cr(NS)(NC-Me)s](PF6)2 (1)In the presence of Zerf-butyl isocyanide and Zn powder, 1 is reduced to [Cr(NS)(CN-CMe3)s]PF6 (3), while subsequent oxidation of...

Effects of water contamination with perchlorate and hexavalent chromium [Cr (VI)] on the mosquito Culex quinquefasciatus were assessed. The chronic (10-day) LC50s values for perchlorate and chromium were 74+/-8.0 mg/L and 0.41+/-0.15 mg/L, respectively. Relative Growth Index, a measure of growth and mortality rates in a population, was significantly reduced within 5 days for levels of perchlora...

OBJECTIVE Chromium has gained popularity as a nutritional supplement for diabetic patients. This study evaluated the effect of chronic administration of a chromium complex of D-phenylalanine (Cr(D-phe)(3)) on glucose and insulin tolerance in obese mice. The study tested the hypothesis that Cr(D-phe)(3) suppresses endoplasmic reticulum (ER) stress and insulin resistance in these animals. METHO...

OBJECTIVES Chromium VI (hexavalent chromium, Cr(VI)) is an established cause of lung cancer, but its association with gastrointestinal cancer is less clear. The goal of this study was to examine whether the current human epidemiological research on occupationally inhaled Cr(VI) supports the hypothesis that Cr(VI) is associated with human stomach cancer. METHODS Following a thorough literature...

A number of peptides containing methionine and glycine, such as Met-Met-Gly, Met-Met-Gly-Met, and Met-MetGly-Gly, were synthesized by conventional techniques. The growth response of Saccharomyces cerevisiae G1333, a methionine-requiring auxotroph, toward various di, tri, and tetrapeptides containing methionine was measured. The yeast mutant utilized and contained peptidase activity toward most ...

EXTENDED ABSTRACT Hexavalent chromium [Cr(VI)] has long been recognized as a potential carcinogen, via the inhalation route while nowadays, there is an increasing concern that Cr(VI) is also carcinogenic by the oral route of exposure. According to this, governments apply more stringent regulations for chromium species. There are several discussions and intentions to lower the current maximum pe...

Carcinogenic heavy metal chromium, in its hexavalent form (Cr(VI)), is spuriously used in various industrial operations because of its hardness and stability and is found in industrial effluents in concentrations much above WHO’s prescribed limit (50 mg/L). Conventional methods for removing toxic chromium ion (by chemical reduction followed by precipitation, ionexchange and adsorption on activa...

Micro/mesoporous chromium, aluminium-containing silicates of the type TUD-1 (Al-TUD-1, Cr-TUD-1, CrAl-TUD-1) and zeolite BEA, Cr-BEA, and related composites BEA/TUD-1 and Cr-BEA/TUD-1, were prepared, characterised, and tested as solid acids coupled with the ionic liquid (IL) 1-butyl-3-methylimidazolium chloride ([bmim]Cl) as solvent, in the transformation of D-glucose into 5-(hydroxymethyl)-2-f...