Materials Literature
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InGaPBi crystalline thin films with up to 2.1% bismuth concentration have been grown on GaAs substrates by molecular beam epitaxy. Rutherford backscattering spectrometry confirms that the majority of Bi atoms are located at substitutional lattice sites. The films exhibit good surface, structural, and interface quality…
Norit active carbon-supported Ni–Pd catalysts were prepared, by incipient wetness impregnation, from the metal chlorides NiCl2·6H2O and PdCl2. The catalysts were characterized by temperature-programmed reduction, X-ray diffraction, and scanning electron microscopy, and by temperature-programmed hydrogenation (TPH) of…
Este trabajo comprende una revisión de la aplicación de la inducción de ultra-alta frecuencia (UHFIS) en la sinterización de aleaciones pulvimetalúrgicas de base hierro para diferentes ambientes. Los tres ambientes estudiados son: atmósfera, argón y vacío aplicados a material ya consolidado. Aleaciones base hierro ya…
Abstract Objective: The aim of the study was to determine the amount of radiation exposure in the orthopedic operating theater, to show that the radiation dose was decreased with distance from the tube, and to inform personnel about protective measures. Methods: Ionised radiation was measured in the orthopedic operati…
The straightforward large-scale synthesis and the ability to adjust the properties of polymers make polymers very attractive materials. Polymers have been used in numerous applications and an increased demand is foreseeable. However, a serious issue is the accumulation of enormous amounts of end-of-life polymers, whic…
Trivalent americium has a nonmagnetic (J=0) ground state arising from the cancellation of the orbital and spin moments. However, magnetism can be induced by a large molecular field if Am^{3+} is embedded in a ferromagnetic matrix. Using the technique of x-ray magnetic circular dichroism, we show that this is the case…
The residual low-angle grain boundary (GB) network is still the most important current-limiting mechanism operating in biaxially textured rare-earth barium-copper-oxide (REBCO) coated conductors. While Ca doping is well established to improve supercurrent flow across low-angle GBs in weak fields at high temperatures,…
Long-term application of sewage sludge resulted in soil cadmium (Cd) and zinc (Zn) contamination in a pot experiment conducted to phytoextract Cd/Zn repeatedly using Sedum plumbizincicola and Apium graceolens in monoculture or intercropping mode eight times. Shoot yields and soil physicochemical properties changed mar…
Molar reaction Gibbs function change, molar reaction enthalpy change, equilibrium constant, and the equilibrium partial pressure of SO2 and NO for the reaction of simultaneous removal of SO2 and NO by using aqueous KMnO4/ammonia solution are calculated based on the principle of chemical thermodynamics. The results sho…
Two types of reversible addition-fragmentation chain transfer molecularly imprinted polymers (RAFT-MIPs) were synthesized using different monomers, which were methacrylic acid functionalized β-cyclodextrin (MAA-β-CD) and 2-hydroxyethyl methacrylate functionalized β-cyclodextrin (HEMA-β-CD), via reversible addition-fra…
Abstract To reclaim a limestone quarry, 200 and 400 Mg/ha of municipal sewage sludge were mixed with an infertile calcareous substrate and spread as mine soil in 1992. Soil samples were taken 1 week later and again after 17 yr of mine soil rehabilitation so as to assess changes in the amount and persistence of soil or…
Abstract Microstructural evolution and compressive properties of two-phase Nb-Fe binary alloys based on the C14 Laves phase NbFe2 were characterized at both the hypo- and hypereutectic compositions. The experimental results indicated that the microstructures of the two alloys consisted of fully eutectics containing Fe…
The annihilation processes of positrons with medium electrons are investigated in details. We solved the main problem of creation of nanoundulators, which have very large lifetimes, and by which we can control. The lifetime of a positron in the regime of channeling is estimated s, which on a times is bigger than at us…
The tensile behavior of plain round reinforcing bars corroded with various radius losses along their length is investigated experimentally and analytically. In the experiments, various corrosion topographies are simulated through accelerated electric corrosion tests using bare rebar specimens and different cathode arr…
An analytical method was applied to investigate the effects of strain rate, low temperature, and impact direction on the energy absorption of composite specimens. The performance of an analytical model was found to be adequate for modeling composites before failure initiation. Results indicated that impact performance…
Human umbilical cord derived mesenchymal stem cells (hUC-MSCs) are known for self-renewal and differentiation into cells of various lineages like bone, cartilage and fat. They have been used in biomedical applications to treat degenerative disorders. However, to exploit the therapeutic potential of stem cells, there i…
The positron surface state and the energetics for positron reemission are investigated using two-component density functional theory (TC-DFT) in the projector augmented-wave framework. Trapping of positrons by the surface image potential and the effect of the positron band-shift energy in the surface region are approp…
A smart design: Magnetically recoverable catalysts that use dendritic ligands to remain either directly on the surface of iron oxide nanoparticles, or on a silica intermediary layer, allow the fabrication of catalysts with significantly enhanced catalytic properties for a wide range of reactions.
This study deals with the development of interpenetrating polymer network (IPN) microspheres of acrylamide (AAm) grafted onto a chitosan (CS) backbone and methylcellulose (MC). Chitosan-graft-polyacrylamide (CS-g-PAAm) was synthesized by cerium (IV) ammonium nitrate-induced free radical graft polymerization. The graft…
The present study evaluated the effect of whey protein isolate (WPI) coating enriched with thyme essential oil (EO; 3, 5, and 7%, v/v) on whole trout chemical and microbial quality during refrigerated storage at 4 ± 2°C. As a result of this study, the addition of thyme essential oil to WPI coatings enhanced quality si…