Materials Literature
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The ultra high-lime with aluminum process (UHLA) has the ability to remove sulfate and chloride in addition to other scale-forming materials from recycled cooling water. Laboratory experiments have demonstrated that the UHLA process can achieve high chloride removal from recycled cooling water, and an equilibrium mode…
Abstract Three cobalt(II) complexes, [Co(X)2(4NOpy)4] (X = NCO−, NCS−, and Br−; 4NOpy = 4-(N-tert-butylaminoxyl)pyridine) were prepared, and their molecular structures were characterized by X-ray structure analysis. The molecular geometry of [Co(X)2(4NOpy)4] (X = NCO− and NCS−) is a compressed octahedron, in which the…
A lasing condition is formulated in matrix form for optically anisotropic thin films. Lasing behavior of liquid-crystal slabs is analyzed. In particular, it is shown that if the spatial extent of a liquid crystal slab is much larger than its thickness, then laser emission is feasible not only along the normal to the s…
Purpose To study the effect of concentration, voltage, take‐over distance and diameter of pinhead, etc. on precursory poly(phenylene vinylene) (PPV) electrospinning, in order to improve uniformity and achieve desired ultra‐fibre. Design/methodology/approach Various ultra‐fibres were prepared under different conditions…
The degree of colour shift depending on viewing direction in the in‐plane switching (IPS) mode has been investigated. The IPS cell with pure twist deformation exhibits a stronger colour shift than that of the IPS cell with tilt as well as twist deformation, although the former has better luminance uniformity in the br…
Densely packed and well-aligned coaxial (core-shell) CdS-CdO and ZnS-ZnO nanorod arrays were prepared with a one-step, non-catalytic, template-free metalorganic chemical vapour deposition (MOCVD) process by using single-source molecular precursors Cd(O-EtXan)(2) and Zn(O-EtXan)(2), respectively (O-EtXan = S(2)COCH(2)C…
A novel controlled drug delivery system was fabricated by coating chitosan/PAA multilayer onto magnetic hollow spheres via a "Layer-by-Layer" (LBL) assembly approach. Cefradine was used as a model drug to evaluate the drug release characteristics of this core-shell hollow structure and the results show that it exhibit…
The authors have fabricated thin films of alpha tantalum (α-Ta) with crystalline and amorphous structures by nonequilibrium pulsed laser deposition techniques, and compared their electrical properties and diffusion characteristics with those of polycrystalline beta tantalum (β-Ta) films produced by magnetron sputterin…
A polymer dispersion consisting of soft latex spheres with a diameter of 135 nm was used to produce a crystalline film with face-centered cubic (fcc) packing of the spheres. Different from conventional small-molecule and hard-sphere colloidal crystals, the crystalline latex film in the present case is soft (i.e., easi…
A utilização de polímeros bioreabsorvíveis na área médica tem aumentado a cada ano. Dentre os polímeros bioreabsorvíveis mais estudados, encontra-se o poli (L-ácido láctico-co-ácido glicólico), PLGA, cuja principal característica é apresentar curto tempo de degradação e por isso, aplicado como suturas, dispositivos pa…
The experimental investigation was carried out to study the weld microstructure of resistance spot welding of AZ31 Mg alloy 1 mm thick. A fine and homogeneous non-equilibrium microstructure of globular α grains, surrounded by eutectic mixtures of α and β (Mg 17 Al 12 ), was achieved. The thermal–electrical–mechanical…
Permanganate coatings show promise as replacements for chromate conversion coatings on aluminum alloys used in the aerospace industry. The development of permanganate conversion coatings on AA2024-T3 (UNS A92024) from acid solution was followed for up to 240 s using scanning electron microscopy (SEM), x-ray photoelect…
Phonon wavepacket propagation in defective carbon nanotubes has been investigated through molecular dynamics simulations. We have demonstrated that the wavepacket scattering method enable the phonon transmission function of carbon nanotubes to be determened with high accuracy. We have also found that the influence of…
Abstract Two new poly(amide‐imide)s containing cinnamoyl and azobenzene units have been synthesized by direct polycondensation reaction of two diacids having cinnamoyl units and a diamine incorporating azobenzene group, using triphenyl phosphite and pyridine as condensing agents. The polymers were readily soluble in v…
Abstract The hydrogen effect on dislocation nucleation in Ni single crystals with (111) surface orientation has been examined with the aid of a specifically designed nanoindentation set-up for in situ electrochemical experiments. The effect of the electrochemical potential on the indent load–displacement curve, especi…
A novel route was investigated for the preparation of metal injection moulding (MIM) titanium alloys by TiH2 powder. It can be known from the analysis of thermodynamics and kinetics of dehydrogenation reaction that decomposition occurs when hydrogen partial pressure is ∼10−2 Pa at 300°C. The temperature range of dehyd…
Two essential concepts for students to grasp in the undergraduate organic chemistry sequence are substitution chemistry and elimination chemistry (S N 1/S N 2 and E1/E2). However, students are often confounded by the seemingly endless series of structure–reactivity relationships. This dualistic relationship of concept…
The methods to prepare mesoporous silica materials and their derivatization by catalytically active functional groups covalently anchored to the surface are summarized. A short description of the major characterization techniques is also given. The transformations induced by solids with anchored basic functions mainly…
Hydrogen sulfide is a colorless and flammable gas under room temperature. Usually hydrogen sulfide is considered to be toxic; however, the recent research revealed that hydrogen sulfide in the cardiovascular system plays the role of a vascular dilator. The physiological role of hydrogen sulfide depends on its in vivo…
Abstract To undertake the development of technology to increase consumption of aluminum in passenger cars for improved fuel economy through lightweighting of cars as a measure to control global warming. More specifically, R&D is conducted on the following R&D themes to develop a material with a high formabilit…