Materials Literature
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The influence of surface energy and structural properties of carbon coated polyethylene (PE) on the human platelet adhesion was studied. Three types of amorphous carbon coating were obtained by plasma pulse discharge, with the number of pulses grading as 10, 50, 100. Human serum albumin adsorption experiments have bee…
Polyolefin plastomer films formulated with slip and antiblock were blown on a wide die gap with and without two DynamarTM polymer processing additives (PPAs). A wide die gap was used so that melt fracture-free film could be obtained with no PPA present for comparison purposes. The films were analyzed for the following…
Raman spectra of layered intercalation compounds FexNbS2 (0.159 ≤ x ≤ 0.325) are measured at room temperature. When the hydrostatic pressures are applied to the sample with x = 0.239, the phonon energies are increased linearly with increasing the pressure up to 7.7 GPa. We revealed that the A1g mode at 170.4 cm—1 and…
More than 150 t of diamond grits (China makes and uses about half of the world supply) are consumed each year in sawing constructional materials (eg concrete, granite, marble). These diamond grits are typically synthesised under high pressure and high temperature with graphite as the source material and a molten metal…
In this research, the effect of isothermal physical aging on creep behavior of stainless-fiber/poly-phenylene ether (PPE) composites was investigated. Metal-fiber/PPE composites are non-crystalline thermoplastics and often used in engineering plastics, which have been developed for Electro-Magnetic-Interference (EMI)…
In this paper, the friction and wear behavior of a carbon composite is studied. Friction tests were performed under constant friction mode. The power inputs were increased gradually to study their effects on friction transition at ambient air environment. Friction surfaces were examined using various macro and nanosco…
The effects of temperature and strain rate on elongation of Al–4.5Mg alloy were investigated at 10−4–10−2 s−1 and at 573–773 K . The elongation depended on the temperature and strain rate even in the solute-drag creep region; as a result, a large elongation of 352% was attained at 653 K and at 10−3 s−1. Necking develo…
A comprehensive testing programme was undertaken to evaluate the effects of irradiation, thermal ageing, specimen orientation, and test temperature on the fracture oughness and tensile behaviour of a Type 309L/308L stainless steel strip clad deposit. Specimens were irradiated in the high flux reactor (HFR) Petten to n…
The Accelerator Production of Tritium (APT) project proposes to use a 1.0 GeV, 100 mA proton beam to produce neutrons via spallation reactions in a tungsten target. The neutrons are multiplied and moderated in a lead/aluminum/water blanket and then captured in 3He to form tritium. The materials in the target and blank…
Yttrium-iron garnet, Y3Fe5O12 (YIG), is formed via the peritectic reaction of YFeO3 (YIP) and liquid phases. The direct growth of YIG from a highly undercooled melt with stoichiometric YIG composition was studied using an aero-acoustic levitator with a CO2 laser heating system. Although a YIG droplet was successfully…
Full size and sub-size tensile test specimens were machined from well characterized, specially cast, alloy 718 test material. Hydrogen was charged into the test specimens by the exposure to a pure 100 bar hydrogen atmosphere at 600 O C during 24 hours, leaving 35 ppm H in the full size test bars and 6 ppm in the sub-s…
2-(N-pyrrolyl)ethylvinyl ether (2-NEVE) was synthesized from 2-chloroethylvinyl ether (2-CEVE) via a phase catalysis reaction. Cyclic voltammetric studies were carried out to check for the electroactivity of 2-NEVE. Poly(2-(N-pyrrolyl)ethylvinyl ether) [poly(2-NEVE)] was synthesized via chemical methods. Graft copolym…
+ and 33mM glucose polyhydroxybutyrate (PHB) formation reached its maximum - up to 20% per cell dry weight. Polyhydroxyalkanoate (PHA) inclusion bodies were detected either qualitatively after Nile Blue staining or quantitatively by high pressure liquid chromatography (HPLC). After ten hours of cultivation, 50.7 mg pu…
Polyurea microcapsules containing pesticide (Dursban trade name for 0,0- 3,5,6-trichloro-2-pyfidyl phosphorothioate, C91-I11C13NO5PS) as an active agent were prepared by reaction of polyisocyanate (such as toluene diisocyanate) and polyamine (such as diethylene triamine) as the monomers . The first step gives rise to…
Detecting and locating incipient failure in underground cables before electrical faults occur has significant benefits in terms of customer satisfaction and quality of supply statistics particularly for worst served customers and investment targeting. Timely location and targeted replacement of specific sections of un…
Epitaxial thin films of the spinels Mg2TiO4 and Mg2GeO4 are grown by a solid-state reaction between MgO(001) single-crystal substrates and vapours or thin films of the oxides TiO2 and GeO2 respectively. Cubic-to-tetragonal phase transitions in the Mg2TiO4 films are studied by transmission electron microscopy including…
The transport of octamethylcyclotetrasiloxane (D4), one of the major constituents of silicone fluids and rubbers, and low viscosity polydimethylsiloxane oil into a silica filled cross-linked silicone elastomeric rubber was measured as a function of temperature, cross-link density of the rubber, and concentration of th…
A mixed vanadium manganese oxide was synthesized through a chimie douce route. The synthesis proceeds via a cationic exchange reaction occurring between the layers of a synthetic rancieite, a lamellar manganic acid. The vanadium atoms were found to be at a distance from Mn close to the Mn–Zn distance in chalcophanite,…
Abstract Antiaromatic isophlorin with N21,N22-(1,2-diphenyletheno) and N23,N24-(carboethoxymethano) double bridge was dioxygenated at the Cmeso–Cpyrrole-α double bond of the dipyrrylmethene moiety having the N21,N22-(1,2-diphenyletheno)-bridge, leading to an isobilirubin derivative that was characterized by X-ray crys…
Thermal expansion behaviors in a- and c-axes in quartz are formulated in terms of the rotational motions of the corner-linked rigid SiO4 units around the <100>hex and the expansion of the tetrahedral units. Collective transfer motions of atoms between the double-wells of potential energies, observed in a previous mole…