Materials Literature
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Mold powder is generally made of SiO 2 and CaO with little amount of calcium fluoride (CaF 2 ) and carbon. Basically, F − has a crucial effect on viscosity and crystallization of the powder. However, emission of toxic materials containing F − constituent such as HF and SiF 4 leads to serious environmental pollution. O…
The UV irradiation of the Pt complex in aqueous solutions results in its photoaquation by a heterolytic metal-to-ligand bond cleavage mechanism.
Through the addition of inorganic salts as porogens during an alcohol-based sol–gel process high surface area silica glasses and aerogels with varying pore sizes are synthesized. In the presence of ZnCl2 and CaCl2 respectively, tetraethyl orthosilicate (TEOS) dissolved in ethanol hydrolyzes also in the absence of any…
Abstract This paper provides analysis of losses in the hysteresis-driven three-phase power converter with IGBTs and free-wheeling diodes. The converter under consideration is part of the self-excited induction generator (SEIG) vector control system. For the analysis, the SEIG vector control system is used in which the…
The trajectory of motion of a copper shell, the velocity of its flight, and the pressure of the explosion products on the inside of the copper shell were simulated. It was found that there is a significant difference in pressure behavior between experiments and calculations performed using the standard equations of st…
Experimental results on the partial oxidation of methane-ethane and C 1 –C 4 alkane gas mixtures are reported. The effect of the parameters of the process on the methanol-to-carbon monoxide ratio in the reaction products is examined and the possibility to control this ratio, important for the subsequent carbonylation…
In order to enhance the surface properties of steel substrates, nanoNi-TiN composite coatings were prepared using ultrasonic-electrodeposition technology in this paper. The effects of ultrasonic on composite coatings were studied. The X-ray diffraction (XRD) study had been utilized to detect the crystalline and amorph…
Changes in permeability and magnetic losses in non-oriented electrical steel sheets resulting from compressive stress have been investigated using a single-sheet tester. A compressive stress of up to 20 MPa is uniformly applied normal to the sheet surface. It is demonstrated that a stress beyond 5 MPa can decrease mag…
Eye is the most unique organ of the body. Various drug delivery systems are used to deliver drug into the eyes but there are various limitations of conventional systems, so various novel approaches like nanovesicular systems were used to improve ocular contact time, bioavailability, residence time and dosing frequency…
There is a quantum spin Hall state in the inverted HgTe quantum well, characterized by the topologically protected gapless helical edge states lying within the bulk gap. It has been found that for a strip of finite width, the edge states on the two sides can couple together to produce a gap in the spectrum. The phenom…
The bamboo speciesGuadua angustifoliais a natural functionally graded material with a high potential to help solving the housing deficit in Latin American countries. Bamboo plantations also play an important role to help reducing the devastation of tropical forests. Many studies have demonstrated the excellent mechani…
Functional sensing materials with desirable responses to a particular quantity of interest can be an enabling technology for successful development of sensors that can be deployed in a wide variety of applications. Au nanoparticle–incorporated metal oxide–based sensing layers have recently shown significant promise as…
The structure of the diffusion regions in antiparallel magnetic reconnection is investigated by means of a theory and a Vlasov simulation. The magnetic diffusion is considered as relaxation to the frozen-in state, which depends on a reference velocity field. A field-aligned component of the frozen-in condition is prop…
This paper describes investigations of Eurofer97 and oxide dispersion strengthened version of this steel, in as received state and after annealing. Vickers hardness test was performed on the as received specimens and after annealing at various temperatures to obtain information about development of the strength of stu…
Metasurfaces presenting a phase-gradient are designed at 10 GHz and are proposed to steer an antenna's radiated beam from broadside towards endfire direction. The metasurfaces are composed of both inductive and capacitive grids and the phase-gradient is achieved by modifying the elements in the inductive grid. Such ph…
This study aimed to examine the relationships between the characteristics of charcoal from Qualea parviflora Mart. using canonical correlation analysis. Five trees were analyzed in such way that 5-cm thick discs were removed from each tree at the base, DBH (1.30 m), middle and top sections. The wood was carbonized in…
Farooq A ShiekhAvalon University School of Medicine, Curaçao, Netherlands AntillesCancer is not one, but many heterogeneous diseases1 with complex genetic and epigenetic alterations2,3 that annually afflict millions of people worldwide. Despite the progress in understanding the molecular mechanics of cancer,4 its trea…
Due to the necessity of obtaining a surface that is resistant to wear and oxidation, hydraulic cylinders are typically coated with hard chrome through the process of electroplating process. However, this type of coating shows an increase of the area to support sealing elements, which interferes directly in the lubrica…
Xiaomin Yi, Fuli Wang, Weijun Qin, Xiaojian Yang, Jianlin Yuan Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China Abstract: Near-infrared fluorescence (NIRF) imaging is an attractive modality for early cancer detection with high sensitivity and multi-…
The present investigation shows the wear behaviour of as-cast and heat treated, A356 aluminium alloy reinforced with SiC and Graphite particles subjected to different ageing durations. The liquid metallurgy technique was used to fabricate the composites. The reinforcement content was varied from 0 to 9 % by weight in…