Materials Literature
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Using first principles calculations within the generalized gradient approximation, the structural stability of compound Mo-S clusters at subnanometer level is discussed based on results obtained for various Mo5Sn isomers with n=5–15. The symmetrical Mo-S bonds generally lead to higher stability, while the formation of…
Data on the synthesis of bifunctional octasubstituted phthalocyanines are reported. Some specificities of their electronic absorption spectra, thermal stability, and other properties, depending on the substituent nature and central metal ion, are revealed.
Surirella bifrons var. intermedia O.Mull. and Surirella fuellebornii O.Mull., including its infraspecific taxa, were re-evaluated using historical East African material collected in the early 20 th century from which Otto Muller described more than 100 new diatom taxa. In addition, mate- rial from the Hustedt Diatom C…
The surfaces of medical materials are coated with polymer molecules or drugs in order to functionalize the surfaces in ways such as imparting biocompatibility. However, in the case where the medical materials are inorganic, there is the problem that they will have poor adhesiveness to polymers and be liable to peel. F…
Ellipsometric characterization on the basis of multi-layered modeling is proposed to describe the optical and electrical property transients of hydrogenated films. In particular, two-step modeling is developed to make ellipsometric characterization on the yttrium film and the palladium capped yttrium film deposited on…
We report here the first electrochemically prepared surface-enhanced Raman scattering (SERS)-active silver substrates containing visible light-responsible TiO2 nanoparticles. The SERS-active Ag substrates with TiO2 nanoparticles were prepared by roughening the substrates using electrochemical oxidation–reduction cycle…
This report assesses various elements of the Washington State Department of Transportation (WSDOT) hot-mix quality assurance (QA) specification. Current WSDOT QA specifications contain measures of in-place density, asphalt content, and aggregate gradation for contractor pay and special provisions allow for additional…
Agglomeration and ignition of aluminum particles coated by nickel have been investigated. A controlled chemical deposition technique for coating aluminum particles by nickel was developed. Coated Al particles with nickel content from 1 to 15 wt% were produced. Investigations of the behavior of the nickel-coated Al par…
Grain size distributions and average grain sizes in the longitudinal direction of the Cu interconnect in 50-, 70- and 80-nm-wide Cu interconnects were evaluated and compared with the resistivities of each interconnect. After annealing, the standard deviation of grain sizes for 50-nm Cu interconnect increased to 27.5,…
MgZn4.3Y0.7 alloy powders were prepared using an industrial scale gas atomizer, followed by warm extrusion. The powders were almost spherical in shape. The microstructure of powders as atomized and bars as extruded was examined as a function of initial powder size distribution using Scanning Electron Microscope (SEM),…
The glide of a single edge dislocation in an elastic field of point defects randomly distributed over a crystal is investigated taking into account the influence of the phonon subsystem of the crystal. The force of retardation of the dislocation motion is calculated, and the velocities at which this force has a local…
In the existing literature dealing with flashover simulation or theoretical studies, the discharge is considered to have a tubular form of uniform diameter, and its evolution is simply its foot displacement at the surface of the pollution or of the ice, while it maintains its tubular form. After presentation of the eq…
The aim of this paper is to better understand the material behaviour involved in machining operations. During machining, the workpiece experiences large strains, high strain rate, high temperatures, complex loading histories, and recovery. To reproduce these loadings and to understand the behaviour of 100Cr6 bearing s…
Functionalization and multiplication of porphyrins by transition metal-mediated reactions (Sonogashira coupling, Negishi coupling, Stille coupling, Mizoroki-Heck alkenylation, Buchwald-Hartwig reaction, Suzuki-Miyaura coupling, cobalt-mediated [2+2+2] cyclization, Grubbs' metathesis reaction, etc.) are reviewed. When…
The improvement of the dielectric strength of SF6 insulated systems by using a thin dielectric coating to change the surface state of electrodes was studied. The paper deals with the breakdown probability of a coaxial aluminium electrode arrangement with different surface roughness in pressurized SF6. Thin epoxy resin…
A new, low-cost, enhanced pulsed-DC PACVD deposition system was designed and tested to evaluate its capacity to produce quality DLC films. The main focus of the study was to attain DLC films with low friction coefficients, low total stress, a high degree of hardness, and very good adherence to the substrates on deposi…
2,6-Pyridinediylbisalkanamides were synthesized, using diaminopyridine (DAP) as a linker and alkyl chains of varying lengths, that upon self-assembly form submicron-sized sheets and their uptake into the cytoplasm of HeLa cells was studied by confocal microscopy.
The anti-inflammatory effect of seed powder [SPP I (100 mg/kg) and II (200 mg/kg) p.o.] and aqueous extract [SPE I (100 mg/kg) and II (200 mg/kg) p.o.] of Strychnos potatorum. Linn (Loganiaceae) seeds was studied in carrageenin-induced hind paw edema and cotton pellet granuloma models. In carrageenin-induced rat paw e…
A new polymer composite material and textile product has been developed. The main constituents of this composite are thermoplastic polymer and embedded carbonyl iron powder. Through an extrusion process, endless flexible fibers having diameters of 200 and 500 mm have been produced. The fibers show a very high degree o…
The Al–Cu–Fe quasicrystal (QC) has been shown to reveal high catalytic activity and thermal stability for steam reforming of methanol (SRM: CH3OH + H2O → 3H2 + CO2), after leaching with NaOH aqueous solution. To investigate the origin of the high catalytic performance, cross-sectional transmission electron microscopy…