With thiocyanate, zinc(II), cobalt(II) and copper(II) ions form stable anion, [M(SCN)4] . This anion in turn with methylene blue (MB) forms ion-pair of the type MB2[M(SCN)4] and turns methylene blue to violet. The stoichiometry and stability constants of the ion-association complexes were determined using BenesiHildebrand method and the stoichiometry was confirmed by Job’s continuous variation ...

In this research, infiltration behavior of W-Ag composite compacts with Nickel and Cobalt as additives has been investigated. Nickel and Cobalt were added to Tungsten powder by two distinct methods: mixing elementally and reduction of salt solution. The coated Tungsten powders were compacted under controlled pressures to make porous skeleton with 32-37 vol. % porosity. Infiltration process was ...

Cobalt nanoparticles were synthesized using the gamma radiolytic technique, and particle size was found to be reduced from 12±1 7±1 nm by increasing dose 10 60 kGy. The UV-visible absorption spectra measured exhibited a steady maxima at 517 in UV region, which blue-shifted toward lower wavelength with decrease size. By taking conduction electrons of an isolated that are not entirely free but in...

Cobalt nanostructures with different size and morphology, i.e., spherical nanoparticles, nanorods, and particles arranged into elongated structures, were prepared using micelles and microemulsions as confined reaction media. The syntheses were carried out using three types of systems: aqueous surfactant solutions, oil-in water (O/W), and water-in-oil (W/O) microemulsions. The influence of the s...

Glutamate mutase catalyses an unusual isomerization involving free-radical intermediates that are generated by homolysis of the cobalt-carbon bond of the coenzyme adenosylcobalamin (coenzyme B(12)). A variety of techniques have been used to examine the interaction between the protein and adenosylcobalamin, and between the protein and the products of coenzyme homolysis, cob(II)alamin and 5'-deox...

Any archaeological artefact made from recyclable material may have been recycled before deposition. Three approaches are presented which identified recycling in the record: (1) application of log ratio analyses to investigate compositional data indicates that Roman glass was and reapplied as a glaze on Parthian pottery, thereby suggesting paucity Sasanian record is due recycling; (2) linear mix...

The active centers of carbon catalysts doped with cobalt, nickel, copper, manganese, zinc, and chromium were modeled by density functional theory methods. Likewise, the thermodynamics oxygen reduction reaction (ORR) on model determined. features chemical properties chromium-containing material, namely its spontaneous oxidation into hydroxo form, revealed. In addition, it was established that am...