Materials Literature
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Статья посвящена вопросу оценки заедания в спироидных передачах. Описаны требования для проведения исследования задиростойкости спироидного зацепления на физической модели. На основе факторного анализа определен безразмерный критерий заедания, характеризующий взаимосвязь между факторами, оказывающими влияние на процес…
Предлагается инженерный метод расчета местных главных напряжений, упруговязкопластических деформаций и удельных энергий в зонах концентрации при длительном растяжении элементов конструкций. Рассмотрен пример использования метода при кратковременном и длительном растяжении стержня с кольцевым надрезом. Показано, что ув…
Background: Surgery is the treatment of choice in the management of primary pterygium. Recurrence following excision is frustrating to both the surgeons and patients alike. India being a tropical country is an ideal home for pterygium.Methods: This study was carried out in a tertiary care hospital. A comparative prosp…
A series of polyoxometalate silver salts (AgnPOM) with low solubility were prepared by mechanically grinding the dry solid mixture of Keggin-type polyoxotungstates with different central heteroatoms and the silver nitrate. The as-prepared AgnPOM solids were further UV-irradiated, resulting in the generation of metalli…
A TiAlSiN coating was deposited on H13 hot work mould steel using a cathodic arc ion plating (CAIP). The friction-wear performances of the obtained coating under different loads were characterized on an HT-1000 type high temperature tribological tester at 800[Formula: see text]C. The morphologies and chemical composit…
The impact on the surface, such as damage, must be considered when cleaning the workpiece by high-pressure water jet. If the impact force for cleaning is too strong, it will damage the surface quality of the workpiece. And it will have a negative impact on the precision fit, so that the workpiece can’t meet the requir…
Tungsten as the most effective carbide-forming element was added in the Fe–Cr13–C hardfacing alloy to precipitate WC particles. Optical microscope (OM), scanning electron microscope (SEM) and energy-dispersive spectrometer (EDS) were used to investigate the microstructures of the hardfacing alloy. The wear resistance…
Metal‐supported silica membranes are attractive candidates for CO2capture from the exhaust of coal‐fueled power plants. Compared to their full ceramic counterparts, the introduction of the metal support facilitates sealing of the membrane by established technologies, such as welding, and enhances the robustness of the…
biotechnology open access journals Advances in biotechnology and microbiology is an Open Access, peer reviewed scientific journal focused towards publishing a complete and reliable source of information on the innovations and ongoing developments in the field of Biotechnology & Microbiology.
The new triplesalophen ligand H6kruseBr was synthesized as a variation of the triplesalophen ligands H6baronR by replacing a phenyl by a methyl group at the terminal ketimine in order to allow closer contacts of trinuclear complexes due to less steric hindrance by the smaller methyl group. The ligand H6kruseBr was use…
INTRODUCTION: Labeling using iron oxide particles enables cell tracking through magnetic resonance imaging (MRI). However, the magnetic field can affect the particle-labeled cells. Here, we investigated the effects of a clinical MRI system on primary human hepatocytes labeled using micrometer-sized iron oxide particle…
Due to the mismatch between ZnO film and [Formula: see text]-Si lattice, there are a large number of interface states which seriously affect the photoelectric properties of ZnO/[Formula: see text]-Si heterojunction optoelectronic devices. In this research, ZnO thin films were deposited on [Formula: see text]-Si by mag…
Magnesium phosphate-doped hydroxyapatite and magnesium hydrogen phosphate-doped dicalcium phosphate dihydrate superhydrophobic coatings were electrolytically deposited on an AZ91D alloy. The contact angles of water/oil were 155°/141°, respectively. In comparison with the bare substrate, electrochemical measurements of…
Phase equilibria in diphenyl ether– n -tetradecane and diphenyl– n -tetradecane systems are investigated calorimetrically. The phase diagrams of these systems are calculated using the Schröder–Le Châtelier equation. Based on the calculated data, an experimental study of phase equilibria by means of differential scanni…
NaLaX, NaX + Co, and NaPdX catalysts are synthesized by modification of NaX zeolite with transition metals (La, Co, Pd). The activity of the prepared materials in catalytic ethanol oxidation is studied in the temperature range of 423–723 K. It is shown that NaPdX and NaX + Co accelerate the reactions of partial and co…
We investigated the electronic and optical properties of ZnO under the circumstances of isovalent anionic doping by sulfur. A pseudopotential implementation of density functional theory is applied within the local density approximation to examine the modification of band structure in wurtzite ZnO by sulfur substitutio…
Tunneling of the spins in the ${\mathrm{Fe}}_{8}$ molecular magnet from a metastable ground state to an excited state is accompanied by a decay of these spins to the global ground state and an increase of the crystal temperature. We measured this temperature using two thermometers, one strongly coupled and the other w…
When an immiscible oil is dispersed in an aqueous solution of a surfactant, emulsions consisting of various-sized oil droplets are generated. Micrometer-sized oil droplets exhibit exotic dynamics such as self-propelled motion in the surfactant solution. Transfer of the surfactant from the aqueous solution phase to the…
Abstract Electrical sheets of electrical machines are laminated to reduce eddy current loss. However, a series of punching and pressing processes form random galvanic contacts at the edges of the sheets. These galvanic contacts are random in nature and cause an additional eddy current loss in the laminated cores. In t…
In this paper we study the problem of the heat and diffusion of one substance through the pores of two layered material of gypsum board products, which may absorb and immobilize some of the diffusing substances with the evolution or absorption of heat. This paper proposes a thermal conductivity model for gypsum plate…