Materials Literature
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The present investigation aims at studying and modelling the flow behaviour of the AZ31 magnesium alloy by means of torsion tests performed in extended ranges of temperature and strain rates. Two types of rheological models were considered. The former is based on the power law equation, whilst the latter is based on t…
The high strain rate superplastic deformation properties and characteristics of a rolled AZ91 magnesium alloy at temperatures ranging from 623 to 698 K (0.67Tm−0.76Tm) and high strain rates ranging from 10−3 to 1 s−1 were investigated. The rolled AZ91 magnesium alloy possesses excellent superplasticity with the maximu…
The interaction of NO (900 ppm NO/N 2, 2 × 10 5 Pa, RT) with a hydroxylated alumina surface was investigated by in situ polarization modulation infrared reflexion absorption spectroscopy (PM-IRRAS). The resulting spectra reveal two distinct periods, namely 0-1 day and 1-13 days of exposure. During the first period, NO…
The effect of pH value on the adsorption behavior and inhibition mechanism of dodecylamine for carbon dioxide corrosion of carbon steel was investigated by electrochemical methods and scanning electron microscopy (SEM). The results indicated that the pH value of the solution played the crucial role to the adsorption b…
Well-aligned ZnO nanorods and nanopins are synthesized on a silicon substrate using a one-step simple thermal evaporation of a mixture of zinc and zinc acetate powder under controlled conditions. A self-assembled ZnO buffer layer was first obtained on the Si substrate. The structure and morphology of the as-synthesize…
Hybrid materials with nanoscale structure that incorporates inorganic and organic phases with electronic properties offer potential in an extensive functional space that includes photovoltaics, light emission, and sensing. This work describes the nanoscale structure of model hybrid materials with phases of silica and…
BACE (beta-site APP cleaving enzyme) or beta-secretase, the enzyme responsible for processing APP to give the N-terminal portion of the Abeta peptide, is a membrane bound aspartyl protease consisting of an ectodomain catalytic unit, a C-terminal transmembrane segment and a cytoplasmic domain. Three BACE constructs, pE…
The tensile properties, deformation and fracture behavior of an electrodeposited Cu with an average grain size of ∼ 90 nm were investigated. Compared with other nanostructured Cu documented in the literature, this material exhibits a combination of high yield strength (356 MPa), good tensile elongation (18.2 %) and du…
The possibility, in principle, of using tertiary phosphine oxides with different structures as fire retardants for polyvinyl chloride plastisols was examined, and their ability to reduce the flammability of these materials was analyzed.
The luminescence spectra of aluminum oxide with an ordered system of through pores have been studied. The diameter and density of pores were ≈ 50 nm and 1.2 × 10 10 cm −2 , respectively. Amorphous aluminum oxide formed by anodization of aluminum foil in an oxalic acid electrolyte shows intense luminescence in the blue…
Ultra-thin epitaxial NbN layers are a key component of Superconducting Single Photon infrared Detectors. Efforts devoted to the layer growth aim at improving their critical temperature and critical current density, while keeping their thickness close to 5 nm and Tc above 10 K, which insure a large bandwidth, large SNR…
Abstract Summary: We carried out a systematic study of the electrical properties of carbon nanotube‐based polymeric composite materials. Our purpose was the production and characterization of a light, thin and mechanically strong new composite material able to cover electric circuits against external electromagnetic i…
We investigate the stability and dissociation of methane, which is the most abundant organic molecule in the universe, using diamond anvil cell (DAC) with in situ Raman spectroscopy up to 903 K and 21 GPa. At the temperatures of 793 and 723K and the corresponding pressures of 16.15 and 20.30 GPa, methane dissociates t…
Abstract We have studied the Raman spectroscopic signatures of nanodiamonds from the Allende meteorite in which some portions must be of presolar origin as indicated by the isotopic compositions of various trace elements. The spectra of the meteoritic nanodiamond show a narrow peak at 1326 cm −1 and a broad band at 15…
Biomolecular templates provide an excellent potential tool for bottom-up device fabrication. Self-assembling α -synuclein protein fibrils, the formation of which has been linked to Parkinson's disease, have yet to be explored for potential device fabrication. In this paper, α -synuclein fibrils were used as a template…
Four new salts of the P2Se8(2-) anion have been prepared, starting from easily available reagents using different reaction strategies including reaction of the elements, oxidation of P4Se3 with alkalimetal diselenides and elemental selenium, and the use of an ionic liquid as a reaction medium. Multinuclear NMR investi…
The phase transformations of five binary iron-manganese (Fe-Mn) alloys with manganese contents ranging from 1 to 21 weight percent have been characterized in the temperature range between room temperature and 1250 °C. Differential scanning calorimetry and dilatometry were used to experimentally characterize both the p…
Neurotrophic factors comprise a broad family of secreted proteins that have growth promoting, survival promoting and differentiation inducing activities. Disruption of neurotrophic factor signalling is a characteristic of many central and peripheral nervous system disorders, such as Alzheimer's disease, Parkinson's di…
A novel, online-joining of C/SiC-C/SiC method, precursor infiltration and pyrolysis, was used to obtain high temperature stable joining SiC composition, while joining process was highly consistent with C/SiC preparation process. The compositions of joining ingredients and process parameters were investigated to determ…
Polymer blends of chitosan (CHI) with poly(vinyl pyrrolidone) (PVP) have been prepared by solution blending, and their miscibility studies were carried out by using physical techniques over an extended range of concentration and composition in buffer solution. The viscosity, ultrasonic velocity, density, and refractiv…