Materials Literature
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As well known, the surface conditions of solid materials strongly affect the flashover phenomena under high electric field. The artificial doping ingredients could change the energy distribution and the density of electron and hole traps. The trapping parameters in the surface layer have some influences on the surface…
Wave propagation approach of single- and double-walled carbon nanotubes conveying fluid is presented through the use of the continuum mechanics. A simplified Flügge shell equations are proposed as the governing equations of motion for carbon nanotubes studied here. For the double-walled nanotubes, the deflection of ne…
Abstract A field-mapping and crystal-chemical study of two alunite- and halloysite-rich deposits in the Turplu area, situated northwest of Balıkesir on the Biga Peninsula of northwest Turkey reveals a mineralogically diverse and a potentially economic clay deposit. The mineral assemblage along fault zones is dominated…
Abstract Species of Scenedesmus and Desmodesmus are ubiquitous in freshwater ecosystems. However, phenotypic plasticity coupled with the minute variations between named species make the identification of taxa by light microscopy extremely difficult, especially from field samples. As a result, the actual level of diver…
A number of silicone rubber composite insulators have been examined following 15 years of service on a coastal 400 kV transmission line in the UK. Extensive measurements of their hydrophobicity, as determined by contact angle, are given along with a description of their appearance. The hydrophobicity change varied fro…
The effective 'one-pot' microwave-assisted synthesis of several substituted 5,10,15,20-tetraarylporphyrins is reported. The microwave-assisted insertion of five different transition metals into the 5,10,15,20-tetraphenylporphyrin, 5,10,15,20-tetrakis(4-chlorophenyl)porphyrin and 5,10,15,20-tetrakis(3-hydroxyphenyl)por…
Abstract Some preliminary studies on epoxidation, hydroxylation, acrylation and urethanation of Linum usitatissimum seed oil (LO) and its derivatives have been carried out. Epoxidation and hydroxylation were performed in situ using H 2 O 2 and acetic acid to develop epoxidized oil (LOE) and epoxy polyol (EP). EP was m…
The controllable synthesis of hexagonal Zn-doped CdS (Cd 1 - x Zn x S, x = 0−0.3) nanorods from a class of solid air-stable single-source molecular precursors (cadmium zinc bis( N, N -diethyldithiocarbamate), Cd 1 - x Zn x -(DDTC) 2 ) has been achieved by two facile steps: first, Cd 1 - x Zn x -(DDTC) 2 ( x = 0−0.3) w…
In this article, we have demonstrated one-step solid-phase transformation from high-quality cadmium carbonate microcrystals into highly nanoporous cadmium oxide. The high crystal quality of cadmium carbonate is critical for the successful fabrication of porous nanoarchitectures with predetermined morphology and well-c…
Abstract Thermogravimetric analysis combined with mass spectrometry was used to study H 2 O bound to samples of illite-1 M , illite-2 M 2 and leucophyllite-1 M . Samples were heated in a helium atmosphere at different temperatures and after heating at each given temperature were cooled to 35°C. Each cycle in the mass…
For pt.I see ibid., p.3-14, (2007). Insulation assessment of HV cables requires continuous partial discharge (PD) monitoring to identify the nature of insulation defects and to determine any degradation trends. However to recover PD signals with sufficient sensitivity to determine such insulation degradation in substa…
Cholesteric liquid crystals (CLCs) selectively reflect light when the wavelength matches the helical pitch. The reflectance is limited to 50% of ambient, unpolarized light because only circularly polarized light of the same handedness as the helix is reflected. Here the elaboration procedure and the properties of a CL…
The water absorption of wood plastic composites (WPCs) prepared from sawdust and virgin and/or recycled plastics (HDPE and PP) was studied. Wood flour was prepared from sawdust and mixed with different virgin or recycled plastics at 50% by weight fiber loading. The mixed materials were compression molded into panels.…
Vascular bypass grafting is a commonly performed procedure for ischemic heart disease and peripheral vascular disease. However, approximately one in fourteen patients do not have suitable autologous arteries or veins available for grafting. Synthetic vascular grafts were introduced in the 1960s to overcome these probl…
[structure: see text] Three phosphorus(V) porphyrins with axial carbazole-based dendritic substituents (D-A-D) have been designed and synthesized, which are nonfluorescent due to their effective electron transfer from the carbazole dendron to the excited porphyrin within the dendritic matrix. The incident photon to cu…
Red luminescence emission from chromium doped β-Ga2O3 nanowires has been studied by means of photoluminescence (PL) techniques. PL excitation shows several bands in the ultraviolet-visible region. Time decay values, obtained by time resolved PL, at different temperatures fit a three level model with thermal population…
Poly(o-methoxyaniline) hollow spheres with holes in their surfaces have been successfully prepared in aqueous solution in the absence of doping acid. By simply changing the monomer concentrations, the size of hollow sphere and the size of hole can be tuned in a wide range.
The crystal structure of a terrestrial 6H-SiC moissanite has been refined in the P6 3 mc S.G. from area detector single crystal X-ray data, down to an R-index on the observed reflections of 0.0205. The cell parameters refined over all the collected reß ections are a = 3.0810(2) and c = 15.1248(10) Å. The average Si-C…
Glycerol droplets at a nematic-liquid-crystal-air interface form two different lattices--hexagonal and dense quasihexagonal--which are separated by the energy barrier and can coexist. Director distortions around each droplet form an elastic dipole. The first order transition between the two lattices is driven by a red…
The mechanism and kinetics of Cu corrosion in anoxic aqueous chloride solutions containing sulfide (10−3 mol/L) have been investigated electrochemically and under natural corrosion conditions. Under these conditions Cu is thermodynamically unstable in anoxic water, and the anodic growth of a chalcocite (Cu2S)/digenite…