dc Biasing with a pulse train enabled us to follow the process of solid-state anodization of aluminum on silver metaphosphate glass, a silver-ion conductor. Anodization induced formation of a dielectric oxide in which the capacitance (around 10−7 F/cm2) decreased with increasing bias field, caus...

We observed photo-induced conduction in silver- or gold-electroded silver metaphosphate glass by illumination from a mercury lamp. Photo-illumination caused photoelectron emission from the electrode surface. The silver or gold ions thus generated were neutralized by the electrons from the outsid...

Comparison is made between sodium metaphosphate glass and silver metaphosphate glass with regard to electrical response to biasing with a dc pulse train. Both glasses show polarization and depolarization peaks at the onsets of biasing and off biasing, respectively. The polarization for the forme...

A novel unique tetraimine Schiff-base macrocyclic barium complex, derived by the template reaction of 4-chloro-2,6-diacetylpyridine with 1,2-diaminoethane, was formed. In the solid state this barium complex exhibits trinuclear motifs with a triangular ring of the macrocyclic ligands and encapsul...

The technology of structuring arrays of multilayer carbon nanotubes using pulsed laser radiation is presented. Arrays of two types nanotubes (long and short) with different morphologies were synthesized on a silicon substrate by the method of plasma enhanced chemical vapor deposition from the ga...

Anhydrous bulk barium nitrate decomposes over the temperature range 500–700 °C, with the main decomposition taking place at 630 °C. The gaseous products were oxygen and nitric oxide that were evolved simultaneously. Minor amounts of nitrogen dioxide, nitrogen, and nitrous oxide were also dete...

A phase transition has been observed at 211 K in crystalline barium nitrite hemihydrate by DTA and dielectric measurements. A dielectric relaxation phenomenon was also found and the activation energies governing the relaxation were determined to be 23 kJ mol−1 and 41 kJ mol−1 below and above the...

The globally-observed relationship between oceanic barium and the macronutrient silicic acid results from the shared influence of large-scale ocean circulation and mixing on the two elements, and the inherent link between barium and organic matter formation and dissolution. A detailed examinatio...

In 2010, the Directive on undesirable substances in animal feed entered into force and for the first time was laid down a maximum limit for nitrite content in sugar industry feed materials such as molasses and beet pulp. Due to a lack of suitable analytical methods for nitrite determination, thi...

Barium cycling in the ocean is associated with a number of processes, including the production and recycling of organic matter, freshwater fluxes, and phenomena that affect alkalinity. As a result, the biogeochemical cycle of barium offers insights into past and present oceanic conditions, with ...

We diagnose the relative influences of local-scale biogeochemical cycling and regional-scale ocean circulation on Atlantic barium cycling by analysing four new depth profiles of dissolved Ba concentrations and isotope compositions from the South and tropical North Atlantic. These new profiles ex...

The phase relation and the dehydration behavior of barium nitrite hydrates have been examined by DTA under various external pressures, and by TG-DTA in air. The equilibrium water vapor pressures of the mono-, hemi-, and 13-hydrates have been measured. The temperatures of III-II and II-I phase tr...

Diel variations in the concentrations of a number of constituents have the potential to substantially affect the appropriate sampling regimen in acidic streams. Samples taken once during the course of the day cannot adequately reflect diel variations in water quality and may result in an inaccur...

A comparative study of ionic conductivity in a series of alkali metal nitrites was carried out. Experimental results were interpreted in terms of the classical model of Schottky defect formation in ionic crystals when the cationic vacancies are the dominating charge carriers. The point defect fo...

Laboratory polymerization of pyrrole was carried by chemical oxidation method with zinc tungstate (ZnWO4) ceramic to synthesize polypyrrole/zinc tungstate nano composite in presence of ammonium persulphate [(NH4)2S2O8] as an oxidizing agent. The synthesis was made with 10 to 50 wt %. of (ZnWO4) ...

The ternary heterojunction of silver [email protected] tungstate/tungsten trioxide ([email protected]2WO6/WO3) was designed and synthesised by hydrothermal and deposition–precipitation approaches. The composites were characterised by X-ray diffraction, transmission electron microscopy and X-ray...

A photocatalytic reaction mechanism that involves multielectron reduction of molecular oxygen (O2), as a key step, in photocatalytic decomposition of acetic acid by pristine bismuth tungstate (Bi2WO6; BWO) particles is proposed on the basis of results of studies on (i) comparison of photocatalyt...

We demonstrate the utilization of bismuth tungstate (Bi2WO6, BW) as a sintering aid and reinforcement component into neodymium-doped ceria (Nd0.2Ce0.8O3-δ, NDC) to fabricate bismuth tungstate/neodymium-doped ceria composite electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOF...

The development of enhanced optical devices relies on key materials properties. In this context, researchers have investigated the effects of metal nanoparticles incorporation in active rare-earth materials. Here, we discuss the effects of Silver nitrate addition (0.5%, 1.0% and 2.0% mol%) into ...

Silver tungstate (α-Ag2WO4) microcrystals have shown encouraging results regarding their antimicrobial activity. However, in addition to the promising outcomes in fighting oral disease, cytotoxic tests are mandatory for screening new materials for biological applications. Here, we developed a b...