Materials Literature
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Objective(s): In this study, the effect of electrospun fiber orientation on proliferation and differentiation of mesenchymal stem cells (MSCs) was evaluated. Materials and Methods: Aligned and random nanocomposite nanofibrous scaffolds were electrospun from polylactic acid (PLA), poly (vinyl alcohol) (PVA) and calcium…
Objective: To evaluate and compare the particle and tableting properties of a new sorbitol (SOR) and anhydrous calcium diphosphate (ACD) composite with common excipients used for the preparation of tablets by direct compression such as polyvinylpyrrolidone (Ludipress ® ), lactose (Cellactose 80 ® ) and microcrystallin…
Electrical failure due to surface discharge on the insulation material will cause material degradation and eventually lead to system failure. The flow of leakage current (LC) on the insulator surface under wet contamination is used to determine the material degradation level. According to IEC 60587 standard, LC exceed…
This paper aims to compute the high-frequency parameters of an inset permanent magnet synchronous machine. A homogenization technique for the computation of the eddy currents and the identification of the d-q model at high-frequency of the synchronous machine are briefly recalled. The simulation strategy for the Inset…
Using Tetraethyl orthosilicate (TEOS) and P123 as silicon source and template, mesoporous SBA-15 with high content of surface hydroxyl were prepared by hydrothermal and extraction method via adding HAc and adjusting pH of the reaction system. Amino-functionalized materials were obtained by immersing TEPA onto the surf…
We present a study of the performance degradation of electromagnetic absorbers when applied to doubly curved surfaces. The scattering from a perfectly conducting sphere coated with different types of single- and multilayer absorbers has been evaluated using analytic recursion expressions. A comparison of the effect of…
Nanoparticles hold huge potentials for supporting gene therapy to reach its full potential by supporting targeted delivery of growth factors and DNA into cells for regenerative therapies. The present study fabricates silk fibroin (SF) and hydroxyapatite (HA) nanoparticles (NPs) by electrospraying to mimic the native e…
The patella (kneecap) is commonly described as a flat, triangular bone, situated on the front of the knee‐joint. It is usually regarded as a sesamoid bone, developed in the tendon of the Quadriceps femoris (QF), serving to protect the front of the joint, and increase the leverage of the QF by making it act at a greate…
One of the directions of decrease in power consumption of soil cultivation is change of a form and parameters of elements of a plow body like a plough share and a moldboard. Known mathematical expressions for determination of traction resistance of plows do not allow to consider various degree of loading of different…
The previous studies have explored the effects of Styrene-Butadiene-Styrene (SBS) as the most prevalent modifier for asphalt mixtures. The current study intends to compare stiffness modulus of control and SBS modified asphalt mixtures under different traffic loadings. To this end, resilient modulus tests were performe…
International audience
Researchers at Pohang University of Science and Technology (POSTECH) in Korea have developed a micro solid oxide fuel cell to replace lithium-ion batteries in smartphones, laptops, and even in drones.
The European Commission's Joint Research Centre (JRC) is proposing a test methodology for testing polymer electrolyte membrane (PEM) fuel cells. The resulting harmonised test protocols allow evaluation of the performance and durability of PEM fuel cells by focusing on the membrane-electrode assemblies (MEAs) at the he…
Hostilities in contemporary armed conflicts are increasingly being conducted in population centres, thereby exposing civilians to heightened risks of harm. This trend is only likely to continue with growing urbanization and is compounded by the fact that belligerents often avoid facing their enemy in the open, intermi…
Corrosion of the steel and iron pipes has a great impact on water quality and pipelines lifetime in water distribution systems. Uniform corrosion increases iron content in drinking water and tuberculation dramatically increases hydraulic flow resistance. Also pitting corrosion affects pipe durability and is regarded a…
There is no doubt that the modern scientific studies must keep pace with the era of technology and openness of knowledge has brought about nanotechnology and its applications tremendous leap in various branches of science, especially in the field of industries, including textile contained in the introduction of nano-…
Laser micromachining has proven to be a useful tool for precision processing of semiconductors. For Silicon Carbide (SiC) single crystals, ablation with ultraviolet wavelength laser could lead to the maximum absorption efficiency of incident energy. In this paper, laser ablations were performed on 6H-SiC single crysta…
A novel fluorescent waterborne polyurethane retanning agent (FWPRA) was prepared through chemically incorporation of fluorescer, disodium 4, 4’-bi s[4 - a n i l i no - 6 - hydroxyethylamino-6-(2-choloronilino-1,3,5 triazin-2-yl) amino]stilbene-2,2’-disulphonate (RSW), into polyurethane backbone as a chain extender. Th…
Titanium/aluminum oxide (Ti/Al2O3) composites were fabricated by a vacuum hot-pressing sintering technique at the sintering temperature in the range of 1420–1480°C. The dependence of the sintering temperature on the mechanical properties of the composites was discussed. The results showed that the mechanical propertie…
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