The corrosion resistance of 2024-T3 aluminum alloy was improved by anodizing treatment in a mixed electrolyte containing 10% sulfuric acid, 5% boric acid and 2% phosphoric acid. Electrochemical impedance spectroscopy (EIS) technique was used to study the corrosion behavior of the anodized alloy....

Electrocoagulation (EC) using metallic aluminum as anode and cathode for boron removal from solution was studied. The electrolytic parameters included pH, current density, and initial boron concentration for optimizing the EC process. Experimental results showed that removal efficiency was incre...

A systematic investigation was conducted on the extraction of boric acid from salt lake brine using 2-butyl-1-n-octanol dissolved in sulfonated kerosene. The extraction parameters, including the concentration of extractant, phase ratio and pH value of the brine, were optimized. The salting-out e...

The effect of cerium salt as an inhibitor in anodising of the 2024-T3 aluminium alloy was studied. Scanning electron microscopy equipped with energy dispersive X-ray spectroscopy was used to study the surface composition of the alloy before and after surface preparation. A mixed electrolyte of 1...

GaAs/Ge/GaAs and AlAs/Ge/AlAs heterostructures were grown both on (1 1 3)B and (1 1 3)A GaAs substrates by molecular beam epitaxy. Sublattice reversal in these heterostructures were identified by comparing the anisotropic etching profile of the epitaxy sample with that for reference (1 1 3)B and...

During T cell-dependent (TD) germinal center (GC) responses, naïve B cells are instructed to differentiate towards GC B cells (GCBC), high-affinity long-lived plasma cells (LLPC) or memory B cells (Bmem). Alterations in the B cell-fate choice could contribute to immune dysregulation leading to t...

New preparative methods are reported for telluric acid complexes, Na5[Cr(TeO4(OH)2)2(H2O)2], Na6[Zn(TeO4(OH)2)2(H2O)2], Na6[Pd(TeO4(OH)2)2], Na5[M(TeO4(OH)2)2] (M(III) = Cu, Ag, Au) and K6TeM6′O24 (M′(VI) = Cr, Mo, W). Their structures were characterized on the basis of spectroscopic, crystall...

A novel telluric hyaluronic acid (TeHA) compound was synthesized to imitate the antioxidant enzyme glutathione peroxidase (GPX). The GPX activity of the mimic was found to be 164 U/μmol, which is 165 times as active as Ebselen [PZ51], a well-known GPX mimic. Antioxidant activity was studied by ...

Tellurium-130 has the highest natural abundance of any double-beta decay isotopes. Recently it has been developed as a promising candidate for loading in liquid scintillator to explore the Majorana or Dirac nature of the neutrino through a search for neutrinoless double beta decay (0νββ). To ...

Experimental studies are reported concerning polarization reversal in the single crystal of telluric acid ammonium phosphate (TAAP). The switching currents have been measured under various temperatures and external electric fields. The experimental results have been used in order to obtain the e...

The mechanochemical reactions of telluric acid, Te(OH)6 with alkaline fluorides (Na and K) have been studied using IR and XRD techniques. The reactions lead to the formation of hydrogen-bonding complexes, NaF.Te(OH)6 and 2KF.Te(OH)6. The reactions are free from side products such as alkali tellu...

An efficient method for the stereoselective synthesis of various linearly fused bicyclic acetals using 2-hydroxymethyl glycals, involving Ferrier type rearrangement and ring-closing metathesis as the key steps, is revealed. The methodology was shown to be very general by applying it to various s...

W–Al2O3 nanostructured composite has been produced by mechanical milling of ammonium paratungstate (APT) and Al powder mixture at room temperature. The milled products have been characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM) equipped with energy dispersive spec...

Tungsten carbide powder is conventionally produced by carburization of tungsten powder by carbon black in a solid–solid reaction. This paper reports the carburization of ammonium paratungstate by methane to yield tungsten carbide at low temperature in short times. The carbide powder is fine gra...

In this research, the possibility of mechanochemical decomposition of ammonium paratungstate (APT) has been studied, and compared with thermal decomposition method. For this purpose, APT powders were milled using a planetary ball mill up to 36 h and under air atmosphere. For thermal decompositio...

The thermal decomposition of ammonium paratungstate tetrahydrate has been studied in oxidising atmosphere at four heating rates employing the analytical techniques TG, DTG, DSC, and MS. In total, three endothermic and two exothermic effects have been detected. From the combined thermal and kinet...

In this study, the thermal decomposition of ammonium paratungstate hydrate was investigated in dynamic air and inert gas (nitrogen and argon) atmospheres by simultaneous thermo-gravimetric analysis (TGA), differential thermal analysis (DTA) and mass spectroscopy (MS). The intermediate and end pr...

The solid–gas phase heterogeneous reaction between tungsten oxide powder, ammonia and water vapors was studied with the aim of preparing ammonium paratungstate (APT, (NH4)10[H2W12O42]·xH2O (X = 4, 10)). The effects of the composition, crystal structure and particle size of the WO3 powder were ...

In this study, the reduction-carbonization property of WO3 obtained by thermal decomposition of ammonium paratungstate (APT) under N2 and air atmosphere in a fluidized bed was investigated. The decomposition property of APT in N2 and air was analyzed by TG analyzer. Phase, morphology, deoxidatio...

The effects of temperature, ammonia concentration and ammonium carbonate concentration on the dissolving behavior of ammonium paratungstate were studied in (NH4)2CO3–NH3·H2O–H2O system. The results show that rising temperature, prolonging duration, increasing ammonia concentration and decreas...