Materials Literature
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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.
In the present study, a 10% ethanolic extract of Caralluma arabica, at the doses of 200 and 400 mg/kg, was evaluated for the antigastric ulcer activity using experimental gastric ulcer models induced by phenylbutazone or indomethacin and 80% ethanol or 0.2N NaOH, and cold restraint stress. Some experiments were carrie…
Material design has recently become one of the key topics in the development of smart adaptive composites. In particular, different material constituents of the hybrid polymer composites with embedded Shape Memory Alloy elements (SMA composites) have to be combined and positioned in such a way that predetermined funct…
A new series of dendrimers containing a central cavitand core with four appended Fréchet-type dendrons, linked to the core through 4,4'-bipyridinium (viologen) subunits, have been synthesized, characterized and their electrochemical properties investigated using cyclic voltammetric measurements.
A sharp luminescence peak from Sm doped ZnS at 650 nm which can be assigned as 4G5/2–6H9/2 transition of Sm3+ ion was observed; however, no luminescence peak related to Eu3+, which can have luminescence in the similar spectral region, was observed from Eu doped ZnS. A defect level situated at about 0.36 eV above the v…
In order to investigate the effect of deuteration on the ferroelectric properties of glycine phosphite, single crystals with various deuteration ratio x (0 ∼ 0.78) have been prepared. The crystal form is not affected by the deuteration. Internal bias fields influenced hysteresis loops in all samples cut from crystals.…