Materials Literature
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The photoluminescence (PL) intensity of (MGM) nanophosphors synthesized by glycothermal reaction are times higher than that of (ZGM) nanophosphors. We discuss this reason from the following points of view: ( i ) Mn contents, ( ii ) particle size, ( iii ) crystallinity, ( iv ) spontaneous pressure, ( v ) emission mecha…
The interaction of trimethyltin(IV) and dimethyltin(IV) with dehydroacetic acid was investigated at 25°C and 0.1 M ionic strength in 20% dioxane–water mixture. The stepwise formation constants of the complexes formed in solution were calculated using the non-linear least-square program MINIQUAD–75. The concentration d…
Semiconductor ZnS nanoparticles have been successfully synthesized from solutions containing a nonionic surfactant, Triton X-100 (t-octyl-(OCH2CH2)x OH, x = 9,10). The particle size was estimated as 7.7 nm. The optical spectra enabled to conclude that these nanoparticles exhibit quantum size effects. The prepared nano…
We studied pattern characteristics in randomly perturbed structures exhibiting continuous symmetry breaking. A Lebwohl–Lasher‐type lattice model was used which described well the onset of orientational ordering of a system of rod‐like objects. For example, such systems mimic the orientational ordering tendency in liqu…
The abrasion behavior of high manganese steel is investigated under three levels of impact energy in acid‐ironstone slurry. The wear test was carried out by an MLDF‐10 tester with impact energy of 0.7 J, 1.2 J, and 1.7 J. The impact abrasion property of high manganese steel in corrosive condition was compared accordin…
Sulfolobus acidocaldarius 2-keto-3-deoxygluconate aldolase (SacKdgA) displays optimal activity at 95 degrees C and is studied as a model enzyme for aldol condensation reactions. For application of SacKdgA at lower temperatures, a library of randomly generated mutants was screened for improved synthesis of 2-keto-3-deo…
Enzymatic and carbene catalysed ring opening polymerisation can be combined in a one-pot reaction for the metal-free synthesis of degradable block copolymers.
Purpose: Purpose of this paper is to determine the effect of Equal Channel Angular Pressing (ECAP) processing on the microstructure and hardness of α+β brasses. The effect of deformation temperature and number of passes was investigated particularly on the shape and size of grains of both phases. Design/methodology/a…
Low temperature crystallization of CSD-derived ferroelectric thin films was aimed by laser assisted annealing in this paper. Pb(ZrxTi1-x)O3(PZT) thin films with a MPB composition (Zr/Ti = 53/47) and LaNiO3 (LNO) thin film electrodes were deposited by the chemical solution deposition (CSD) method on a Si wafer. The thi…
In order to improve the mechanical properties of Zr55Al10Ni5Cu30 metallic glass, tungsten-reinforced Zr55Al10Ni5Cu30 was developed. Tungsten particles with a diameter φ=100 μm were uniformly distributed into the matrix, exhibiting good wettability with the Zr55Al10Ni5Cu30 metallic glass matrix. Due to the extremely hi…
Subsea cable applications for the offshore power distribution systems create technical challenges in the system design, operation, and maintenance. Harmonic parallel resonance introduced by subsea cables is one of the main concerns. In this paper, parallel resonance is investigated for an offshore distribution system…
Abstract The objective of this paper is to present a kinetic model for simulating the nitroxide controlled radical polymerization initiated with mono‐ and bifunctional alkoxyamines. The model approach was validated by experimental data. The simulated product composition mainly depends on the equilibrium constants K (=…
The modular synthesis and self-assembly behavior of a set of peptide-polymer hybrid amphiphiles is described. Gly-Gly-Arg derivatives were conjugated to one of the ends of hetero-telechelic polystyrene (PS) via either the Cu-catalyzed azide-alkyne 1,3-dipolar cycloaddition (CuAAC) reaction or conventional peptide coup…
The enthalpies of formation of δ-hexanolactone and δ-nonanolactone were determined by combustion calorimetry. Conformational analysis and quantum-chemical calculations of equilibrium structures, fundamental vibrations, moments of inertia, and total energies were performed for δ-pentanolactone ( I) , δ-hexanolactone (…
Important energy and time savings can be achieved with the thermal treatment of materials by replacing conventional heating methods with microwave heating. The nanocrystallization of Co-Fe-W-B amorphous alloy powders under microwave irradiation was followed for the first time by in situ time-resolved synchrotron radia…
The present paper deals with full-field strain measurement on open-hole tensile specimens submitted to high strain rate through a Hopkinson bar device. After having briefly explained the methodology (using an Ultra-High speed camera), the strain results obtained on a first test are shown leading to a discussion on the…
An icosahedral quasicrystal (i-phase) and its 1/1 crystal approximant (1/1-phase) have been found to form in Al-Pd-Sc system. The formation areas of the i-phase and the 1/1-phase are limited to very small areas around the compositions of Al54Pd30Sc16 and Al56Pd29Sc15, respectively. The valence electrons per atom ratio…
Influences of high-oxygen-pressure (350 MPa) annealing on the properties of leakage current, polarization, and strain were investigated for single crystals of (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3-BaTiO3 with P4mm tetragonal structure The oxygen annealing led to a marked increase in leakage current, showing that the oxidiz…
In this paper, for the first time, an experimental investigation is presented of five successive loadings of reactant alkaline solution of sodium borohydride (NaBH4) for hydrogen generation, using an improved nickel-based powder catalyst, under uncontrolled ambient conditions. The experiments were performed in two bat…
Blue-violet luminescence was observed in a mineral oil, which appeared under hydrodynamic cavitation conditions in a channel orifice 1 mm in diameter in a transparent throttling device at inlet pressures higher than 2 MPa. The appearance of electric pulses when a dielectric liquid flew through a thin channel orifice w…