The calcium aluminate hydrate AFm and AFt phases formed upon hydration of Portland cement have an important role in the stabilization solidification hazardous chromate ions hardened cement. monochromate (Ca4[Al(OH)6]2(CrO4)·12H2O), hemichromate (Ca4[Al(OH)6]2(CrO4)0.5(OH)·12H2O) chromate-containing phase, Ca6[Al(OH)6]2-(CrO4)3·24H2O, were synthesized investigated by 1H, 27Al, 53Cr MAS NMR spect...

Atmospheric pressure plasma (AP) treatment, using an open-air jet of ionized CO2, N2, or air, was applied to AZ91D Mg alloy surfaces investigate its effects on primer coating adhesion and corrosion resistance. The CO2 air AP treatments formed O- C-rich surface layer (Mg-O-C) consisting agglomerated nanoparticles pits with a depth few microns increasing the roughness by 6–8 times compared refere...

Chromium is a toxic heavy metal abundantly present in the environment, specifically groundwater. The groundwater Saudi Arabia was assessed for presence; chromium detected at high concentration Madinah. Many researchers have used various bioprocesses over last few decades to mitigate Cr(VI) toxicity. genus Pseudomonas member putida widely dispersed natural environment. P. chromate-resistant and ...

Maleimides are often used for biomolecular conjugation with thiols. An underappreciated aspect of the imido group in a maleimide conjugate is its susceptibility to spontaneous hydrolysis, resulting in undesirable heterogeneity. Here, a chromophoric maleimide is used to demonstrate that both molybdate and chromate catalyze the hydrolysis of an imido group near neutral pH. Tungstate and 4-(dimeth...

First descriptions of diseases attract tremendous interest because they reveal scientific insight even in retrospect. Max Schottelius, the pathologist contributing the first histological description of pheochromocytoma, remains anonymous. We reviewed the description by Schottelius and weighed the report in modern context. Schottelius described the classical diagnostic elements of pheochromocyto...

The crystal structure of (H(3)O)(2)Cr(4)O(13) is isotypic with K(2)Cr(4)O(13). The finite tetra-chromate anion in the title structure consists of four vertex-sharing CrO(4) tetra-hedra and exhibits a typical zigzag arrangement. The crystal packing is stabilized by hydrogen bonds between these anions and hydro-nium cations. The two different hydro-nium cations are surrounded by nine O atoms of t...

A facile, selective and high yielding bis(trimethylsilyl) chromate (BTSC) catalyzed selective oxidation of alcohols to aldehydes and ketones with periodic acid is reported.

The role of smart-release corrosion inhibitive pigments in preventing cathodic delamination organically coated hot-dip galvanized steel (HDG) is investigated. consisted hydrotalcite (HT) exchanged with a range inorganic and organic anionic species were dispersed model PVB coating. A scanning Kelvin probe (SKP) technique was used to determine rates, the inhibition efficiencies obtained for ions ...