Materials Literature
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This paper concentrates on the modeling of a Silicon based p-i-n solar cell and analyze the performance of it at different doping concentrations, light intensity and temperature. In this paper a virtual structure of Silicon based p-i-n solar cell was modeled and then a major analysis was done to increase the efficienc…
In order to extend the pH stability optimum for NAD + -dependent formate dehydrogenase (FDH, EC 1.2.1.2) from the bacterium Pseudomonas sp. 101 (PseFDH), four mutant enzymes with Lys112Pro, Lys231Ala, Lys231Ser, and Lys317Asn substitutions were obtained by site-directed mutagenesis. The choice of the mutation sites an…
Background Xenotransplantation leads to hyperacute or acute graft reaction due to interaction of preformed human antibodies, mainly αGal‐antibodies, with carbohydrate structures present on non‐human tissue. By removing these carbohydrate structures from porcine decellularized pulmonary heart valves (PHV), grafts might…
The kinetics of dissolution of ceramic UO 2 in aqueous solutions of Fe(III) nitrate in the presence of TBP in supercritical CO 2 was studied. Quantitative recovery of U into solutions of Fe nitrate in combination with its extraction from the solution into the fluid occurs under these conditions within ∼2 h, which is b…
Selective oxidation of methane into fuels and chemicals has attracted significant attention from researchers worldwide. However, because of its high stability, methane conversion involves multistep reactions. Hence, several catalytic approaches including homogeneous, heterogeneous biological and photocatalytic methods…
We evaluated the effects of Fe3O4 magnetic nanoparticle (NP) films on the electrical characteristics of superconducting quantum interference devices (SQUIDs) at 4.2 K to enhance the performance of superconducting circuits. The NP films were formed directly on the SQUIDs. For SQUIDs with 5-nm-NP films, the SQUID induct…
Abstract In this study, Ni-SiC composite coatings were electroplated on the 5xxx series aluminium alloy substrate. The effect of the quantity (25g/l i 50g/l) and the size (3μm, 0,41μm and 50nm) of SiC particles introduced into the bath as a dispersed phase on properties of the coatings was tested. The influence of the…
In industry, core components such as crushers, miner feeder devices and impact stone breakers are exposed to heavy wear which involves mechanisms such abrasive wear and / or impact abrasion. The purpose of this work is to identify complex wear mechanisms that occur in such conditions and to correlate them with the pro…
Abstract The topic of the study was to verify in vivo survival of in vitro cultured autologous and allogenous chondrocytes suspended in a fibrin glue Beriplast® or seeded on Collagen type I-Hyaluronan (Col type I-HYA) scaffolds for the regeneration of articular cartilage defects in rabbits. The study was carried out o…
Dynamic mechanical spectroscopy and differential scanning calorimetry were used to study the effect of various fillers (carbon fiber, glass fiber, and aramid fiber) on the kinetic characteristics of glass transition in polymer composite materials based on epoxy resin. It is shown that the composite based on carbon fib…
The alkaline activation of aluminosilicates materials has been motivated by their enhanced thermomechanical properties. Despite the majority of studies comprise the evaluation industrial byproduct of precursors (fly ash and slag), metakaolin (Al2O3.2SiO2) is acknowledged to have structure and chemical composition char…
This paper presents development distribution voltage restorer (DVR) using three-level diode-clamped converter for creating voltage to compensate using power electronics switching device. Converter is controlled the injection voltage by using voltage regulations without transformer connected to the power system. Low-pa…
Increasing the concentration of indium atoms and hydrogen was found in the α-phase of the foil of a Pd-In alloy (with 5.3 and 5.0 at % In) after its electrolytic hydrogenation and 500-h relaxation. It is shown that the structural variations in the foil during the β → α transformation are nonmonotonic.
Abstract The possibility of employing high temperature milling (600°C) for the production of highly coercive Nd-Fe-B powders was examined. The materials were the Nd12Fe82B6, alloy which was subjected to mechanical milling and the powders of the constituent elements of this alloy which were processed by mechanical allo…
Advancing climate change poses an increasing threat to humanity, together with the higher demand for energy around the world. New ‘cleaner’ technologies for the production of energy from solid fuels (coal or biomass) via thermo-chemically viable routes are required. Chemical looping combustion (CLC) is a process conce…
ABSTRACT: An efficient method for purification of Yard-Glass Shaped Boron Nitride NanoTubes (YG-BNNTs) fabricated via a Chemical Vapour Reaction (CVR) route has been developed. Impurities including carbon, Boron Nitride (BN), and Fe species in the pristine YG-BNNT sample are removed by a combined physical and chemical…
The exchange interactions of the nearest-neighbor exchange constant between tetrahedral and octahedral sublattices (J AB (x)), nearest-neighbor exchange constant inside tetrahedral sublattice ( J AA ( x )) and nearest-neighbor exchange constant inside octahedral sublattice ( J BB ( x )) in cobalt and zinc chromites ar…
Рассмотрено влияние добавок Fe2O3, MgO, SiO2 на формирование α-Al2O3 в волокнах оксида алюминия, получаемых по золь-гель технологии. Показано влияние указанных оксидов на размер кристаллитов α-Al2O3, распределение их по размерам, на скорость роста зерен при увеличении температуры термообработки
A density functional theory (DFT) study was performed on distribution of skeletal aluminum and Brønsted acid (B-acid) sites as well as the acid strength in ZSM-48 zeolite. The correlation between Si / Al molar ratio and the general acid strength was also investigated. The calculations were performed based on 51T and 9…
Ruthenium-promoted cobalt nanocatalysts that are supported by carbon nanotubes (CNTs) are prepared using impregnation and microemulsion techniques. Ruthenium loadings were varied from 0 to 1 wt% while the amount of cobalt was fixed at 15 wt%. The nanocatalysts were extensively characterized by different methods and th…