Materials Literature
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Abstract The new multicomponent Co-based catalysts with additives of group 8 metal and rare earth elements and supported on alumina have been tested in the dry and steam conversion of a model biogas. The processes were carried out in a flow quartz reactor under the following conditions: atmospheric pressure, a gas hou…
This study demonstrates the accumulation of electron-induced secondary electrons by utilizing a simple geometrical configuration of two branches of a charged insulating biomaterial. The collective motion of these secondary electrons between the branches has been visualized by analyzing the reconstructed amplitude imag…
Abstract Addition of halides (KCl, KBr and KI) to corrosion inhibitor systems is intended to enhance their inhibition efficiency due to the synergetic effect. Halides ions have been proven to be good corrosion inhibitor intensifiers in acidic or basic media and for both steel and aluminum. The halides ions themselves…
The structural characteristics, electronic properties, and nonlinear optical properties of borazine-based conjugated derivatives have been explored at B3LYP/6-311G( d,p ) level. The effects of various electron donor and acceptor substituents (H, F, Cl, Br, Me, CF 3 , NH 2 , OH, COOH, CHO, NO 2 ) on the structure, pola…
Abstract Use of chemical corrosion inhibitors is quite common in production and processing operations. Depending on the type of acids used, different inhibitors have been developed to minimize corrosion and enhance the life of metal tubulars. Development of new chemicals and chemistries, which maintain good protection…
In the present work a simple and quick technique for cell seeding into tubular-shaped scaffolds, which allows a homogeneous cell distribution, was tested. The poly-L-lactide (PLLA) scaffolds, prepared via diffusion induced phase separation (DIPS), were filled with fibrin gel in order to obtain a hybrid scaffold for Va…
In this study, in order to improve interfacial strength between β-tricalcium phosphate (β-TCP) and poly(L-lactic acid) (PLLA), the surfaces of β-TCP were modified. L-lactic acid was used for an interfacial treatment agent, and effects of the amount of L-lactic acid on mechanical properties of the composites were exami…
We have characterized the charge transport properties of the electronic state at the interface between tetrathiofulvalene and 7,7,8,8-tetracyanoquinodimethane organic crystals as a function of pressure. At low temperature and for all studied pressures, the conductance and the current through the interface exhibit a po…
We report the effects of the addition of Sb 2 O 3 on the superconducting properties of Bi-2223 system. Samples with composition Bi 1.7 Pb 0.3 Ca 2 Sr 2 Cu 3 Sb x O y (x=0,0-0.8 wt.%) are prepared by the solid-state reaction method. Ac susceptibility and high harmonic response of polycrystalline superconductors are mea…
YSZ buffer layers and YBCO superconducting layers were grown on biaxially textured NiW tapes by a reel-to-reel pulsed laser deposition (PLD) technique. It was found that orientation and surface morphology of YSZ buffer layers were very sensitive to deposition parameters, especially to oxygen pressure and laser repetit…
We studied the method to grow a smooth and flat CaF 2 layer on NdFeAsO thin films since CaF 2 is a promising candidate material for the barrier layer of a superconducting junction. When the CaF 2 layer was grown at 800°C, the surface was very rough because {111} facets had grown preferentially. However, when CaF 2 was…
Cross-linking of the polyethylene was performed with a high-energy electron beam. Electron paramagnetic resonance spectroscopy was used to study the lifetime of unpaired electron in the irradiated samples. Time-dependent electrical parameters are investigated for the cross-linked low-density polyethylene. Both dielect…
ABSTRACT The healing variable and enhancement variable were first defined by the fatigue ductility, and then based on the relationship of the damage variable, the healing variable and the enhancement variable, a nonlinear fatigue damage‐healing model was proposed for predicting the fatigue life of the healed copper fi…
Abstract. Electricity is a major cost for cotton gins, representing approximately 20% of variable costs. Fans used for pneumatic conveying consume the majority of electricity at cotton gins. Development of control systems to reduce the air velocity used for conveying seed cotton could significantly decrease electricit…
Optical ridge waveguides were fabricated in 4H-SiC single crystal by combination of 15 MeV C5+ ion irradiation and femtosecond laser ablation. The near-field modal intensity distributions exhibit the well-confined light propagation in the waveguides. A propagation loss as low as 5.1 dB/cm has been achieved at 632.8 nm…
As a supplier to the furniture industry, the particleboard industry is searching for opportunities to reduce costs, weight, and formaldehyde emissions. One such opportunity is to use monocotyledons such as straw and hemp, as well as grasses like reed canary grass. A major problem when using reed canary grass or other…
Density functional theory (DFT) calculations were carried out to investigate the second-order nonlinear optical (NLO) properties of a series of proposed porphyrin-polyoxometalate-based complexes related to [5-(3,5-dimethyl-4-hexamolybdate amino-phenyl-ethynyl)-15-(4-nitrophenyl-ethynyl)porphinato]zinc(II) which have d…
We have investigated random telegraph noise (RTN) observed in individual metallic carbon nanotubes (CNTs). Mean lifetimes in high- and low-current states, τhigh and τlow, have been studied as a function of bias-voltage and gate-voltage as well as temperature. By analyzing the statistics and features of the RTN, we sug…
We have investigated the crystal structure and superconducting properties of the new layered superconductor NdO 1− x F x BiS 2 . Bulk superconductivity with a T c above 4.5 K was observed. It was found that the T c depended on both F concentration and crystal structure. Uniaxial compression along the c axis upon F sub…
We propose a model of spin-polarized current state for electrons in bilayer graphene. The model resolves the puzzles as revealed by experiments that (a) the energy gap ${E}_{\mathrm{gap}}$ of the insulating ground state at the charge neutrality point (CNP) can be closed by a perpendicular electric field of either pola…