Materials Literature
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The inhibition effect of 3-bromo-2-phenylimidazol[1,2- a]pyridine on the corrosion behaviour of C38 steel in 0.5M H2SO4 solution was investigated using weight loss, potentiostatic polarization and electrochemical impedance spectroscopy methods. The inhibition efficiency increased as the concentration of the inhibitors…
Abstract Power transmission factors (PTF) through the sheath of helium plasmas with hot electron component against two kinds of tungsten wall, virgin as well as nanostructured one due to helium irradiation are studied theoretically and experimentally. In the present theory the ion‐induced electron emission in addition…
Cardiovascular system is the primary organ to develop and reach a functional state, which underscores the essential role of the vasculature in the developing embryo. The vasculature is a highly specialized organ that functions in a number of key physiological works including the carrying of oxygen and nutrients to tis…
The electronic structure of the perovskite LaCoO3 at room temperature structure (293 K) was calculated by using PBE, PBE+U and HSE. Different spin configurations have been considered. Our calculations showed that the choice of the Hubbard U parameter in DFT+U and mixing factor α in HSE significantly influenced the ban…
It has been said that, once a bomb casing has fractured, “detonation gases will then stream around the fragments or bypass them, and the acceleration process stops there.” However, while apparently copious gas flow through casing fractures indicates some pressure release, it is also an indication of significant gas dr…
Abstract ADvanced Super Dimension Switch (ADS) mode LCD device with negative dielectric anisotropy LC was known to exhibit bad image sticking and reliability performance. Recently we have developed ADS device with negative LC optimization and special polyimide material matching. We obtained high performance ADS LCD wi…
Efforts have been made to turn empty water sachet (commonly called pure water nylon), palm kernel shell and iron filings, which are all wastes released into the environment from different sectors of production in Nigeria into a useful material of good physical and mechanical properties. These wastes, especially the em…
In this study, we observed a space charge accumulation behavior in the covering materials (Polyamideimide: PAI, Polyester-imide: PEI) for motor windings under applied voltage of square wave. In these days, the inverter-fed motor drive using pulse width modulation control is applied to many electric devices for industr…
The Raman spectra of films of samarium-doped As-Se-S three-component chalcogenide vitreous semiconductors are studied. It is shown that the spectra are constituted by four bands in the frequency ranges 10–100, 195–290, 290–404, and 420–507 cm −1 , which strongly vary with doping. The structural units in As-Se-S and th…
In this research, green synthesis of silver nanoparticles using elaeis guineensis leaves extract was investigated and the effect of reaction time in reduction mechanism and particle size is studied. UV-visible sprectrophotometer was used to monitored the reduction reaction of silver ions to silver nanoparticles and fo…
Caged compounds are light-sensitive molecules with temporarily inactivated biological function. The active compound is released upon irradiation, in which exact spatial and temporal control is accomplished. Beyond this inherently irreversible concept of triggering, the idea of multi-wavelength uncaging provides experi…
The use of chelating agents in the oil well stimulation processes has been proposed as an alternative to the acid treatment when the formations damage do not allow the usage of strong chemical attack. However, this procedure can arouse the corrosion of the steel used in the infrastructure of the oil production. In thi…
We report the microphoto-luminescence band redshifts with individual and multi-Mn(II) ion emissions within CdS microwires. The localized exciton magnetic polarons (LEMPs) corresponding to the d—d optical transitions of Mn(II) account for this shift. This LEMP emission from the double-, three- and four-Mn(II) ions with…
A supercritical technique was proposed to synthesise cerate–zirconate ceramic compound by a high-pressure–high-temperature batch-wise reactor system. TG thermogram of the dried powders for all samples showed three stages of weight loss. Each stage is corroborated by one or two exothermic peaks as shown in DTG signal.…
In Nature, calcium carbonate biomineralizations are the most abundant mineralized structures of biological origin. Because many exhibit remarkable characteristics, several attempts have been made to use them as substitution materials for bone reconstruction or as models for generating biomimetic composites that exhibi…
A design methodology for a multi-band phase shifter using a metamaterial-based transmission line was developed. This method is different in that the loaded-line phase shifter has a phase shift of 90° at the center frequencies of both bands (ISM bands: 902-928 MHz and 2400-2498 MHz) instead of -90° and -270°. The metho…
Abstract We propose a novel approach to achieve a homogeneous alignment of nematic liquid crystal (LC). Two bare substrates are rubbed in antiparallel direction and a mixture of LC and reactive mesogen (RM) is filled into the cell using capillary injection, and then UV is exposed after confirming the clear homogenous…
The mechanism of formation of a cellular dislocation structure in face-centered cubic (fcc) metal crystals subjected to shock compression at strain rates $\dot \varepsilon $ > 106 s−1 has been considered theoretically within the dislocation kinetic approach based on the kinetic equation for the dislocation density (di…
Pre-breakdown phenomena in liquid nitrogen (LN2), often referred as streamers, are the precursor of total breakdown due to the more conductive nature of density-change channels compared to the liquid. The paper characterizes streamer behavior in LN2 under AC voltages using ultra high frequency (UHF) and radio frequenc…
In order to improve the DC dielectric properties of cross-linked polyethylene (XLPE) insulation materials, carbon black (CB)/ XLPE nanocomposites were prepared with the melt blending method. The pulsed electro-acoustic (PEA) method was used to measure the space charge distribution of XLPE and CB/XLPE nanocomposites. T…