Homogeneous complexes of Ti (IV) bearing sterically hindered bidentate diols such as 1,1′-binaphthalene 2,2′ diol (Binol) and substituted Binol were prepared and characterized. These catalyst precursors formulated as [Ti(O∧O)2] or [Ti(O∧O)X2] are found to be active in polymerization of ethyl...

A family of cobalt(II) complexes supported on tridentate dibenzimidazolyl ligands having a general formula: [N(CH3)(CH2)2(Bm–R)2]CoCl2 (where Bm = benzimidazolyl, R = H; –Me; –Bz), have been prepared by the condensation of o-phenylene diamine with methyliminodiacetic acid. The Co(II) complexe...

The reactions of K[Pt(R2SO)X3] with R′CN in water, substitution of acetonitrile in cis-[Pt(MeCN)2Cl2] for sulfoxides and the bridge-cleavage reactions of [Pt(R2SO)(μ-Cl)Cl]2 with R′CN lead to isolation of cis-[Pt(R2SO)(R′CN)X2] (R=Me, R′=Me, X=Cl, Br; R=Et, Ph, R′=Me, X=Cl; R=Me, R′ =CH2P...

The fire retardant effects of natural mixtures of huntite and hydromagnesite have been investigated. As well as being entirely natural these mixtures of minerals can be considered “greener” and more environmentally friendly in their production methods than alternatives such as aluminium hydrox...

The thermal decomposition of natural mixtures of huntite and hydromagnesite has been investigated. Hydromagnesite decomposes endothermically giving off water and carbon dioxide, the mechanism is dependent on heating rate. Mass losses measured by TGA are consistent with the loss of four water mol...

Rare earth element (REE) and strontium isotope data (87Sr/86Sr) are presented for hydromagnesite and surface waters that were collected from Dujiali Lake in central Qinghai-Tibet Plateau (QTP), China. The goal of this study is to constrain the solute sources of hydromagnesite deposits in Dujiali...

To assess the viability of micro-sized hydromagnesite as a precursor in refractory castables bonded with calcium aluminate cement, the volumetric stability and thermo-mechanical properties of high-alumina castables containing different micro-sized hydromagnesite amounts (0–1.6 wt%) after firing...

The mineral hydromagnesite, Mg5(CO3)4(OH)2·4H2O, is a common form of hydrated Mg-carbonate in alkaline lakes, yet the processes involved in its formation are not well understood. This study focuses on Dujiali Lake, in the central Qinghai-Tibetan Plateau (QTP), which is one of the few environmen...

This study provides experimental evidence of the resetting of the magnesium (Mg) isotope signatures of hydromagnesite in the presence of an aqueous fluid during its congruent dissolution, precipitation, and at equilibrium at ambient temperatures over month-long timescales. All experiments were p...

The hydration of reactive periclase (MgO) in the presence of hydromagnesite (Mg5(CO3)4(OH)2·4H2O) was investigated by a variety of physical and chemical techniques. Hydration of pure MgO-water mixtures gave very weak pastes of brucite (Mg(OH)2), but hydration of MgO-hydromagnesite blends gave p...

Huntite and hydromagnesite are important minerals in the synthesizing of fire-safe composites. They are mostly not pure and associated with gangue minerals like magnesite, dolomite, aragonite and calcite. In this study, run of mine ore was subjected to the physicochemical treatment as a function...

Neurological complications as well as movement disorders are relevant symptoms in animals and humans chronically exposed to dithiocarbamates. Using rat pheochromocytoma cells differentiated by NGF (PC12), we investigated whether propineb affects acetylcholine (Ach) release and the molecular mech...

A new copper doped natural montmorillonite modified carbon paste electrode (Cu2 +-Mt-CPE) was developed as a new highly sensitive and selective voltammetric sensor for on-line monitoring of propineb fungicide. The optimization and evaluation of the developed sensor were performed using square wa...

Casting oxide dispersion strengthened (ODS) steel is difficult due to the coarsening and agglomeration of oxide particles during melting and solidification. In the present paper, a new method was developed to prepare 9Cr-ODS steel via the in situ reaction between elemental yttrium in molten Fe a...

12Cr ferritic/martensitic steels with 0, 0.1 wt%, 0.2 wt% and 0.3 wt% theoretical yttrium (Y) additions were fabricated by vacuum inducting melting and casting method. Solubilities of Y in the 12Cr steels are 0.027, 0.078 and 0.17 for 12Cr-0.1Y, 12Cr-0.2Y and 12Cr-0.3Y, respectively. Phase trans...

We have studied the electronic, structural, and elastic properties of scandium carbide and yttrium carbide by means of accurate first principles total energy calculations using the full-potential linearized plane wave method (FP-LAPW). We have used the generalized gradient approximation (GGA) fo...

Yttrium silicate powders were synthesised through acid catalysed sol-gel route using Y(NO3)3.6H2O and tetra ethyl ortho silicate (TEOS) as precursors. The crystallographic phases evolved from the prepared gel on calcination at 1100°C were correlated with the experimental parameters used for syn...

Reactive elements such as yttrium are known to have beneficial effects on oxidation resistance of high-temperature materials. This paper focuses on the effects of yttrium on a single crystal nickel-based superalloy. The evolution of microstructure and mechanical properties are analyzed by compar...

The yttrium carbide Y2C and two related deuterides Y2CD2.55 and Y2CD2.0, were studied by powder neutron and synchrotron X-ray diffraction. During deuteration the Y sublattice undergoes a transformation from cubic (ABCA…) to the hexagonal (ABA…) close packing of the Y layers. Carbon atoms order...

Yttrium monosilicate (YMS) is a candidate environmental barrier coating material. It is a line compound, and its synthesis requires strict stoichiometric control of the starting materials. In this work, YMS was synthesised by the sol-gel method. Yttrium oxide and tetraethyl orthosilicate (TEOS) ...