Materials Literature
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Estimation of the degree of aging and the remaining lifetime of composite insulators is an important issue. In this paper, one shed of a 500 kV AC composite insulator that has operated for three years on a transmission line was studied. The insulator shed was cut longitudinally into four layers from the upper surface…
The EsxB protein from Bacillus anthracis belongs to the WXG100 family, a group of proteins secreted by a specialized secretion system. We have determined the crystal structures of recombinant EsxB and discovered that the small protein (∼10 kDa), comprised of a helix-loop-helix (HLH) hairpin, is capable of associating…
Catastrophic circumstances and equipment failures in electrical networks are mostly caused by emerging unidentified phenomena. Resonance and Ferroresonance are those phenomena, which have been investigated since, many years ago. Manitoba Hydro 230 kV electrical network has experienced Ferroresonant states several time…
Various morphologies of monoclinic CuO powders were synthesized by hydrothermal treatment of copper nitrate, copper acetate or copper sulfate. The synthesized samples were characterized by scanning electron microscopy, X-ray diractometry, the Fourier transform infrared spectroscopy, and diuse reectance spectrophotomet…
Abstract Three Far East diatomites, Puzanov (Kunashir Island, Kuril Islands), Sergeevskii, and Terekhovka (Southern Primorye) are characterized in detail. Rock-forming taxa are identified (Puzanov—Aulacoseira subarctica (O. Müll.) Hawort and Stephanodiscus niagarae var. pusanovae Genkal et Cherepanova; Sergeevskii—Sta…
Abstract Dielectric ceramics samples of barium titanium oxide doped with samarium, having a complex structural formula of Ba2-xSm4+2x/3Ti8O24 (referred to as BST), were fabricated by a high temperature solid-state reaction technique with varying x (0.0, 0.2, 0.4, 0.6). X-ray diffraction technique was used to check the…
It is generally accepted that optimal particle sizes are key for efficient nanocatalysis. Much less attention is paid to the role of morphology and atomic arrangement during catalytic reactions. Here, we unravel the structural, stoichiometric, and morphological evolution of gas-phase produced and partially oxidized co…
With the adoption of composite insulators in the field of high voltage transmission, it is essential to focus on its safety performance. Our study paid attention to the extensive heating within HV ending of 500-kV AC composite insulators in southern China with high level of humidity and proposed corresponding counterm…
The optical properties of colloidal solutions of quantum dots based on cadmium sulfide semiconductor nanoparticles with different concentrations of the initial components have been studied. The absorption and fluorescence spectra are strongly affected by the presence of local energy states formed by crystal-lattice de…
In this paper, we present the design of a flat-base Luneburg type of lens antenna, designed for wide-angle scan. The antenna consists of a 11-layer lens, fed at its base by a array of waveguides. The lens is broadband and has a high aperture efficiency, only 1 dB below that of a reference aperture antenna with uniform…
Nanocrystalline metals with average grain sizes of only a few nanometers have recently been observed to fail through the formation of shear bands. Here, we investigate this phenomenon in nanocrystalline Ni which has had its grain structure stabilized by doping with W, with a specific focus on understanding how strain…
Abstract The paper presents an innovatory low-energy detonation-spraying method suitable for the metallization of ceramic materials, in which the energy necessary for joining the metallic coating with the ceramic is delivered in a mechanical way. In the proposed method, the metallic particles, shot from the spraying g…
The efficiency of two natural naphthenate surfactants (Naphthenic-dimethylamine and Naphthenic-diethylamine complexes), as corrosion inhibitors for mild steel in CO2-saturated 1% NaCl solution, has been determined by linear polarization resistance corrosion rate and potentiodynamic polarization measurements. These com…
The corrosion performance of Carbon steel in HCl solution with different concentration of synthesized Pyridazinium-based Ionic liquids namely: 1-(2-(4-nitrophenyl)-2-oxoethyl)pyridazinium bromide NPEPB, was investigated by electrochemical measurements and weight loss. The obtained results reveal that NPEPB performs ex…
Abstract Treatment of antiaromatic nickel(II) norcorrole with potassium cyanide provided nickel(II) 3‐cyanonorcorrole with perfect regioselectivity without the help of a catalyst. The reaction of the nickel(II) norcorrole with phenol or thiophenol in the presence of a base also yielded substitution products. The antia…
Abstract The new mineral shilovite, the first natural tetrammine copper complex, was found in a guano deposit located on the Pabellón de Pica Mountain, near Chanabaya, Iquique Province, Tarapacá Region, Chile. It is associated with halite, ammineite, atacamite (a product of ammineite alteration) and thénardite. The ga…
In this paper, we present a newly developed near-isothermal X-ray transparent furnace for in situ imaging of solidification processes in thin metallic samples. We show that the furnace is ideally suited to study equiaxed microstructure evolution and grain interaction. To observe the growth dynamics of equiaxed dendrit…
Summary form only given. In this abstract, multi-layer MoS2field-effect transistors (FET)[1]with record short 10 nm nominal channel length (Lch) and ultrathin gate dielectric (EOT~2.5 nm) have been demonstrated. These aggressively scaled devices show high performances including a drain current of 0.52 mA/μm, an on/off…
The review reports studies of polyhydroxyalkanoate (PHA) biodegradation behavior in natural soils of different climatic zones. Degradation of different types of PHA is strongly influenced by the temperature, humidity, type of soil, amount of precipitation and the density of microbial populations.
Spiders utilize fine adjustment of the physicochemical conditions within its silk spinning system to regulate spidroin assembly into solid silk fibers with outstanding mechanical properties. However, the exact mechanism about which this occurs remains elusive and is still hotly debated. In this study, the effect of ac…