Properties of electrorheological fluids based on nanocrystalline cerium dioxide

Effect of conditions of nanocrystalline cerium dioxide preparation from aqueous solutions on its composition and physicochemical properties and on dielectric characteristics of CeO₂ suspensions in polydimethylsiloxane PMS-20 and the magnitude of electrorheological effect for these suspensions has been analyzed. Relationship between physicochemical properties of CeO₂ nanopowders and polarization and functional characteristics of electrorheological fluids derived therefrom has been established.     

Sorption and cytotoxicity of zinc on hydroxyapatite

The preparation, physicochemical properties, and cytotoxicity of zinc-containing hydroxyapatites (HAP) were considered for further using HAP as carriers for zinc-containing drugs and radiopharmaceuticals.     

Influence of annealing at temperatures above the solidus temperature on the structure and galvanomagnetic properties of Bi<Subscript>92</Subscript>Sb<Subscript>8</Subscript> solid-solution thin films

The influence of the annealing temperature from the interval between the solidus and liquidus temperatures of Bi₉₂Sb₈ solid solution on its structure and galvanomagnetic and thermoelectric properties has been studied. It has been shown that films of bismuth–antimony solid solution grown by thermal evaporation in a vacuum will have a large-grained structure after annealing at temperatures higher than the solidus temperature of the solid solution. It has been found that these films offer the lowest resistivity, the highest relative magnetoresistance, and the highest mobility of charge carriers. As the annealing temperature approaches the liquidus temperature, the probability that a dendritic structure will form and antimony-enriched regions will appear grows. This causes an increase in the charge carrier concentration and a decrease in the resistivity with a decrease in the relative magnetoresistance and charge carrier mobility.     

Hydrothermal Microwave Synthesis of MnO<Subscript>2</Subscript> in the Presence of Melamine: The Role of Temperature and pH

Nanocrystalline manganese dioxide have been prepared by hydrothermal microwave treatment of mixed solutions of potassium permanganate and 2,4,6-triamino-1,3,5-triazine (melamine) in pH range 0.5–3. Phase and chemical composition and morphology of the samples was studied by XRD, Raman spectroscopy, and SEM. Conditions (solution pH and temperature) for the formation of single phase MnO₂ powders (α-MnO₂, γ-MnO₂, δ-MnO₂, and δ*-MnO₂) under hydrothermal microwave treatment were determined.     

Mechanism of Galactocerebroside Adsorption on Silicalite-1

Russian Journal of Physical Chemistry A - The maximum adsorption capacity of bovine brain galactocerebroside on samples of silicalite-1 synthesized on solid supports (in powder form and applied to...     

Cd(II) and Cd(II)–Eu(III) Complexes with Pentafluorobenzoic Acid Anions and N-Donor Ligands: Synthesis and Structures

Russian Journal of Coordination Chemistry - The reactions of cadmium(II) and europium(III) pentafluorobenzoates ([Cd(Pfbz) $$left( {{{{text{H}}}_{{text{2}}}}{text{O}}} right)_{{text{4}}}^{ +...     

Acid–Base Properties of Polyhalogenated Tetraphenylporphyrins

Russian Journal of Organic Chemistry - [2,3,7,8,12,13,17,18-Octabromo-5,10,15,20-tetrakis(2,6-dichlorophenyl)porphyrinato]zinc(II) and...     

Dielectric Spectra of TGS + Сr Crystals in the Vicinity of Phase Transition

Crystallography Reports - Dependencies of the complex permittivity of chromium-doped ferroelectric triglycine sulfate crystals (TGS + Cr) have been measured using dielectric spectroscopy method in...