Materials Literature
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In order to be able to simulate long time and large space scale properties of polymer melts one has to resort to coarse grained models, for example by subdividing all polymers into parts and restricting attention to the center of mass positions and velocities of these parts. The dynamics of these variables is governed…
Microstructure evolution during the rapid solidification of Fe-C and Fe-C-P alloys is simulated using the phase-field model for alloys with thin interface limit parameters. Heat transfer equation is solved simultaneously to study the heat flow and the effect of latent heat generation on the microstructure. The calcula…
The barrier effect for copper diffusion and the adhesion properties of copper seed layers were studied for sputtered TaSiN layers. The diffusion depth of copper following 400°C annealing is as deep as 25 nm using conventional tantalum nitride (TaN) barrier layers. With the doping of Si in this layer to form TaSiN, the…
Tensile properties of vascular smooth muscle cells (VSMCs) of synthetic and contractile phenotypes were determined using a newly developed tensile test system. Synthetic and contractile VSMCs were isolated from the rabbit thoracic aorta with an explant and an enzymatic digestion method, respectively. Each cell floated…
The effect of tautomerism on the aromaticity was studied for the free base triazoleporphyrazine at the Density Functional Theory level, using double-zeta double polarized basis sets. The porphyrazine (1), the three tautomers (2a, 2b and 2c) as well as the Ni complex (3) of triazoleporphyrazine were examined. Two indep…
We have purified collagen from two distinct sources; the vertebrate, rat tail tendon and an invertebrate, sea urchin adult tissue, the peristome. The collagenous nature of the purification products was confirmed by amino acid compositional analysis. Both preparations had high contents of glycine and proline residues a…
We present a simple model of a vibrated box of sand, and discuss its dynamics in terms of two parameters reflecting static and dynamic disorder, respectively. The fluidised, intermediate and frozen (“glassy”) dynamical regimes are extensively probed by analysing the response of the packing fraction to steady, as well…
A new model for copper sulfidation by gaseous is described. The analysis focuses on the transport of charged lattice defects in a growing product layer between the ambient gas and the substrate metal. This transport is postulated to occur via both diffusion and electromigration, and chemical reactions at the two phase…
Recording media (MD) was subjected to peeling with the disk having well-arranged pins, followed by acid leaching with HCl and HNO3 solutions, respectively, under irradiation of ultrasound to investigate Tb, Co and Fe from the MD sample. The result was compared with those in the leaching conducted at room temperature a…
Multiwalled nanotubes (MWNTs) composites with electrodeposited polypyrrole (PPy) have been proposed as electrode materials for supercapacitors. The total capacitance of the nanocomposite combines a pure electrostatic attraction of ions and the electrochemical redox reactions of the -conjugated system of PPy. A synergy…
Scanning thermal microscopy (SThM) is a relatively new technique based on atomic force microscopy in which the tip is replaced by an ultra-miniature temperature probe. This paper reports on a preliminary investigation of the application of SThM in the characterization of the thermal properties of carbon fibres and car…
Alfalfa (Medicago sativa L.) is primarily used as a source of forage and animal feed. Improving the economic value of alfalfa could be achieved by developing new uses of this perennial crop. To investigate the potential of alfalfa as a source of industrial materials, we employed a genetic transformation approach to pr…
Macrophytes are an important component of aquatic ecosystems and are requir within the Water Framework Directive (WFD) (2000/60/EC)], to facilitate the ecological status and the general monitoring of ecological status. In addition to macrophytes are indicators of ecological quality in running waters. In particul group…
The influence of cobalt and nickel on the formation of irradiation-induced defects was studied in fluoride, phosphate, silicate and borosilicate glasses. Sample plates of high-purity glasses, undoped and doped with 0.3 mol% CoO and NiO, respectively, were irradiated with UV lamps and with X-rays. The subsequent defect…
Based on the test results carried out on 160kN porcelain and glass AC insulators, a DC insulator and a 35kV composite insulator in the artificial climate chamber, this paper puts forward the flashover performance of the tested insulators in coexisting condition of high altitude, contamination and icing, and analyzes t…
In the present study, such mechanical properties of hydrogenated zirconium as sound velocities, elastic moduli, hardness and stress-strain curve have been evaluated by ultrasonic pulse-echo method, Vickers hardness test, tensile test and resonance method using cantilever beam specimens, and the influence of the hydrog…
Abstract A requirement for the determination of the solubility of minerals is to ensure that equilibrium has been reached. Recent constant composition dissolution studies of sparingly soluble calcium phosphates have revealed an interesting and unusual behavior in that the rates decreased, eventually resulting in effec…
The architecture of 2-D [Mn(H2O)3][W(CN)6bpy]·4.5H2O is controlled by CN-bridging of [W(CN)6bpy]2− to [Mn(H2O)3]2+, face-to-face π-stacking interactions within pairs of [W(CN)6bpy]2− and an extensive network of hydrogen bonds; it provides the first example of a cyano-bridged bimetallic supramolecular assembly of 4.82…
The goal of this work is to overcome the loss of bonding strength experienced by kraft fibres when they are dried and reslurried. Paper strength was compared in the presence or absence of chemical pretreatments of the refined, never-dried pulp. Polyelectrolytes of relatively high molecular mass had the greatest benefi…
The photochromic properties of thienyl- and thieno[3,2-b]thiophenyl-substituted cyclobutene-1,2-diones were examined.