Materials Literature
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Abstract Three pyrotechnic compositions based on ytterbium /polytetrafluoroethylene/Viton® (YTV) 77/18/5, 82/13/5 and 87/8/5 wt.‐% were compared to a baseline magnesium /polytetrafluoroethylene/Viton® (MTV) 60/35/5 wt.‐% composition. YTV though energetically inferior to MTV both gravimetrically and volumetrically exhi…
A novel Co(phen) 2 /C catalyst was prepared by coating cobalt(II) phenanthroline (phen) chelate on BP2000 carbon black and then heat treating in an inert atmosphere. The obtained Co(phen) 2 /C product with 1.0 wt% cobalt loading exhibits similar morphology and porosity characteristics to those of the bare BP2000. X-ra…
Silver nanoparticles (SNPs) are among the most commercialized nanoparticles because of their antibacterial effects. Besides being employed, e.g. as a coating material for sterile surfaces in household articles and appliances, the particles are also used in a broad range of medical applications. Their antibacterial pro…
We recently reported on the synthesis of a new pentadentate N(4)O ligand, tBuL(-), together with the X-ray diffraction structure of the corresponding mononuclear manganese(III)-hydroxo complex namely [(tBuL)Mn(III)OH](ClO(4)), (1 (ClO(4))). [El Ghachtouli et al. Energy Environ. Sci. 2011, 4, 2041.] In the present work…
In this study, pure titanium powder with an average size of 20 μm was treated by electroless nickel plating to obtain titanium–nickel composite/duplex powder. Two plating procedures were applied; continuous short period (CSP) and discontinuous long period (DLP) processes. The plated titanium powder particles as well a…
X-ray diffraction (XRD) techniques including stress measurement were applied to untreated, low temperature plasma nitrided and low temperature plasma carburised AISI 304 austenitic stainless steels treated at 425°C for 12 h in H2/N2 and H2/CH4 gases respectively. Relationships between surface microhardness and XRD pea…
We report the intrinsic exchange bias in structurally single phase Cr2Te3 thin film grown by low temperature molecular beam epitaxy. The hysteresis loop shift is confirmed due to the ferromagnet/antiferromagnet coupling rather than surface spin disorder effect or minor loop effect. The AFM component attributing to the…
This study presents a novel high-speed de-excitation system for brushless synchronous machines, where the de-excitation time constant can reach values of several seconds. In these conditions, despite the proper operation of the protection system, the slow de-excitation time constant may produce severe damage in the ev…
The present work refers to a method to selectively modify the crystal habit of acetylsalicylic acid (ASA) through the use of the cyclic oligosaccharide derivatives 2-hydroxybutyl-β-cyclodextrin (HB-β-CD) and 2,6-di- O -methyl-β-cyclodextrin (DM-β-CD) as a growth inhibitor. ASA crystallized in plate crystals in solutio…
Interface-formation processes in atomic layer deposition (ALD) of Al₂O₃ on InGaAs surfaces were investigated using on-line Auger electron spectroscopy. Al₂O₃ ALD was carried out by repeating a cycle of Al(CH₃)₃ (trimethylaluminum, TMA) adsorption and oxidation by H₂O. The first two ALD cycles increased the Al KLL sign…
In this study, the properties of nitrided electroless Ni–B coating prepared by conventional plasma nitriding (CPN), were compared with those of annealed one. For this purpose, electroless Ni–B coatings were deposited from an alkaline bath on AISI 4140 substrates. Then some of the prepared coatings were annealed under…
Abstract The aim of this work was to study the spectroscopic and magnetic properties of copper(II) o-, m-, p-aminobenzoates, o-, m-, p-methoxybenzoates and o-, m- and p-nitrobenzoates. The complexes were synthesized and their compositions were evaluated by elementary analysis. The infrared and Raman spectra for Cu(II)…
Nanostructured alumina coatings have been deposited on SS 304 substrate using atmospheric plasma spray process. In the present work, nanostructured feed powder is obtained by manual granulation of nano-Al2O3 powder particles followed by exhaustive sieving, which is helpful in their proper consolidation. The tribologic…
Efficiency of atmospheric pressure plasma treatment can be highly enhanced by simultaneous high power ultrasonic irradiation onto the treating surface. It is because ultrasonic waves with a sound pressure level (SPL) above ∼140 dB can reduce the thickness of a boundary gas layer between the plasma and the material sur…
Ni–P composite coatings containing SiC nanoparticles or carbon nanotubes (CNTs) were deposited on steel substrates via electroless plating technique. An electrochemical polarisation technique was employed to measure the porosity of Ni–P and composite coatings in as plated condition. The technique was based on the chan…
Capsule structures are often regarded as mimics of living cells and have attracted attention within bio-related fields. In addition, their use in other practical applications has become important. The demands of practical applications have stimulated recent developments in capsule science and technologies. In this rev…
New catalysts for liquid phase nitrate reduction were recently synthesized using multiwalled carbon nanotubes as a support. The most promising catalyst (1%Pd–1%Cu/CNT) was used in this kinetic study. The catalyst experimentally showed high selectivity to nitrogen, between 80 and 89%. A mechanistic model was applied to…
The dynamic and thermal processes of an Mg-Zn-Y alloy droplet's spreading and solidification are investigated using the level set method in order to understand their effects on the phase change process in a uniform droplet spray process. The level set method, driven with the solidification velocity predicted by a free…
BACKGROUND: The kinome is made up of a large number of functionally diverse enzymes, with the classification indicating very little about the extent of the conserved kinetic mechanisms associated with phosphoryl transfer. It has been demonstrated that C8-H of ATP plays a critical role in the activity of a range of kin…
Azadirachta indica A. Juss., Meliaceae, or Indian neem is a plant used to treat inûammatory disorders. Total polysaccharide (TPL) and FI (fractioned by ion exchange chromatography) from the seed tegument of A. indica were evaluated in models of acute inflammation (paw edema/peritonitis) using Wistar rats. Paw edema (m…