Conventional electroless nickel–boron deposits are produced using solutions that contain lead or thallium, which must be eliminated due to their toxicity. In this research, were in a stabilizer-free bath does not include any toxic heavy metal. During processing, the plating rate increased from 10 14.5 µm/h by decreasing concentration of reducing agent, leading stability. The thickness, composit...

New methods of diffusion metallization AISI W1-7 steel have been developed. The paper proposes a comparative analysis the properties and characteristics after three chemical heat treatment: nitriding, nitrogen titration by physical deposition from gas phase, chromium plating with subsequent titanium alloys. results are presented as comprehensive coatings: metallographic, micro-X-ray spectral, X...

The in vivo binding of chromium to whole chromatin, polynucleosomes, DNA, and cytoplasmic RNA-protein fraction from liver and kidney was examined after treatment of rats with sodium dichromate and chromium(III) chloride. Significant amounts of chromium were bound to DNA and the nonhistone proteins of chromatin and to cytoplasmic RNA-protein fraction. The binding of chromium to the nuclear and c...

Chromium is present in the environment in several different forms. The most common forms are chromium(0), chromium(III) (or trivalent chromium) and chromium(VI) (or hexavalent chromium). Chromium(III) occurs naturally in the environment and is an essential nutrient that helps the human body utilize sugar, protein and fat. Chromium(VI) and chromium(0) are generally produced by industrial process...

It has been recognized that chromium is an essential trace element associated with carbohydrate metabolism, and chromium deficiency causes an impaired glucose tolerance. Recently, however, Vincent et al. have reported that chromium is not an essential trace element. In the present report, the author evaluated the nutritional essentiality of chromium by reviewing several previous reports. In alm...

Water pollution is a major problem that impacts financial growth and socio-ecological sustainability of country as well health the population. The presence toxic heavy metals in wastewater such chromium (Cr) (VI), copper, arsenic, lead, mercury, cadmium, etc. may lead to serious issues. Therefore, this paper aims synthesise natural hydroxyapatite (HAp) from black tilapia fish scales investigate...

Contaminants in plating wastewater are hard to remove, especially hexavalent chromium ions. This waste stream contains a large amount of Cr6+, highly toxic metal, potential cause cancer. To reduce this pollution, sludge from supply water treatment plant (DWTS) has been used make adsorbent. was denaturized by thermal method. After that, synthetic contained Cr6+ treated batch adsorption model wit...

AIMS/INTRODUCTION The present study was designed to evaluate the effect of chromium malate on glycometabolism, glycometabolism-related enzyme levels and lipid metabolism in type 2 diabetic rats, and dose-response and curative effects. MATERIALS AND METHODS The model of type 2 diabetes rats was developed, and daily treatment with chromium malate was given for 4 weeks. A rat enzyme-linked immun...