Cobalt may be released to the environment by human activities, as well by weathering of rocks and soil. The primary anthropogenic sources of cobalt in the environment are from the burning of fossil fuels, application of cobalt-containing sludge or phosphate fertilizers, mining and smelting of cobalt-containing ores, processing of cobalt-containing alloys, and industries that use or process coba...

T HE essentiality of cobalt in the diet of sheep has been proved by Underwood and Filmer (I93~), Marston et al. (I938), Bowstead and Sackville (i939), Bowstead et el. (I94z), Pope et al. (1947), and by Keener et al. (I948). Numerous workers in this country and abroad also have identified cobalt deficiency m cattle. Little progress appears to have been made, however, in determining the function ...

Practical chemistry courses at universities very frequently propose the synthesis and characterization of [Co(CO3)(NH3)4]NO3, but this goal is never achieved since students only obtain the hemihydrated form. The anhydrous form can be prepared, however, and its structure is presented here. Similar to the hemihydrate form, the anhydrous phase contains the Co(III) ion in an octahedral O2N4 coordin...

The crystal structure of the title compound, [Co(CO(3))(C(12)H(8)N(2))(2)]NO(3)·H(2)O, consists of Co(III) complex cations, nitrate anions and uncoordinated water mol-ecules. The Co(III) cation is chelated by a carbonate anion and two phenanthroline ligands in a distorted octa-hedral coordination geometry. A three-dimensional supra-molecular structure is formed by O-H⋯O and C-H⋯O hydrogen bondi...

The chemical name and formula in the paper by Castillo, Luque, De la Pinta & Román [Acta Cryst. (2001), E57, m384-m386] is corrected.[This corrects the article DOI: 10.1107/S1600536801012909.].

In the title compound, [Co(C20H14N2O2)(C5H6N2)2]NO3, the Co(III) atom is coordinated in a slightly elongated octa-hedral geometry by the N2O2 donor set of the tetra-dentate Schiff base ligand and by the pyridine N atoms of two trans-arranged monodentate 4-amino-pyridine mol-ecules. The pyridine rings are aligned nearly perpendicularly to each other [dihedral angle = 82.28 (13)°]. The phen-oxy r...

An extensive study of Fischer-Tropsch synthesis (FTS) on alumina-supported cobalt catalysts with different amounts of cobalt is reported. Up to 40 wt % of cobalt, is added to the catalysts by impregnation method. The effect of the cobalt loading on the reducibility of the cobalt oxide species, dispersion of the cobalt, average clusters size, water-gas shift (WGS) activity and activity and s...

Cobalt is a well-established inducer of hypoxia-like responses, which can cause gene modulation at the hypoxia inducible factor pathway to induce erythropoietin transcription. Cobalt salts are orally active, inexpensive, and easily accessible. It is an attractive blood doping agent for enhancing aerobic performance. Indeed, recent intelligence and investigations have confirmed cobalt was being ...

The Co ion in the title salt, [Co(NO(3))(H(2)NCH(2)CH(2)NH(2))(2)](OH)(NO(3)), has oxidation state + III and is coordinated by four N atoms from two ethyl-enediamine mol-ecules and two O atoms from a nitrate anion in a distorted octa-hedral geometry. The charge of the complex cation is balanced by a hydroxide anion and a nitrate anion. The cations and anions are connected by N-H⋯O and O-H⋯O hyd...

The chemical formula in the paper by Wojciechowska & Daszkiewicz [Acta Cryst. (2007), E63, m2975-m2976] is corrected.[This corrects the article on p. m2975 in vol. 63.].