Materials Literature
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As is well known, the unit element of a warp-knitted structure is the loop. It is therefore necessary to have either a physical or a geometrical description of warp-knitted loop configuration to represent it on the computer screen. In the work reported in this paper, a method was developed to obtain a three-dimensiona…
This paper presents experimental results relating the initial austenite grain size to bulk hardness, compressive yield stress (σ0.2%) and volume fraction of stress-induced ε martensite. It is shown that the bulk hardness obeys quite closely the Hall-Petch equation while the yield stress, σ0.2%, decreases with decrease…
Electric Double Layer Capacitance Performance of Porous Carbons Prepared by Defluorination of Polytetrafluoroethylene with Potassium , Yamada, Yoshio, Tanaike, Osamu, Liang, Tien-Tzu, Hatori, Hiroaki, Shiraishi, Soshi, Oya, Asao
The magnetic behaviour of Co–Al, Ni–Al, and Mg–Al hydrotalcites (HTlc) with a M2+/Al3+ molar ratio of 3 and carbonates in the interlayer, as well as the mixed oxides obtained after calcination at 823 K for 5 h, has been investigated by DC and AC magnetic susceptibility measurements and isothermal magnetisation. The sa…
The superplastic behavior of an Al–4.1%Mg–2.0%Li–0.16%Sc–0.07%Zr alloy (1421 Al) subjected to intense plastic straining by equal-channel angular extrusion (ECAE) was studied in the temperature interval 250–450°C at strain rates ranging from 1.4×10−5 to 1.4 s−1. The grain size after ECAE was about 0.8 \\micron and the…
A despolimerização de poli (tereftalato de etileno) -- PET - em água pura e em soluções aquosas 7,5M de ácido acético, ácido sulfúrico, acetato de sódio e hidróxido de sódio foi testada a 100ºC e pressão atmosférica, com o objetivo de obter ácido tereftálico. Foram ainda quantificadas diferenças relativas à influência…
Abstract We present the first package of Java classes specifically aimed at the handling of structural and biophysical problems. To enable object-oriented programming a basis of fundamental Java classes is required which deals with basic operations of vectors, matrices, amino acid sequences, crystal symmetries and PDB…
Dibenzo[g,p]chrysene, a new π-conjugated polycyclic aromatic hydrocarbon, has been found to function as the core fragment for the preparation of discotic liquid crystals. First two derivatives of this novel core were prepared by a palladium-catalyzed annulation reaction of diphenylacetylenes with 2-iodobiaryls, follow…
The crystal structure and magnetic analysis of a cyclic tetranuclear copper(II) complex with formula [Cu4(phen)4(glyOH)4](NO3)4·2H2O, where phen = 1,10-phenanthroline and glyOH = glycolate are described. Copper atoms are connected through bridging carboxylate groups from chelated glycolate units, forming a butterfly-t…
Fuel cell hybrid power systems have potential for the highest electrical power generation efficiency. Fuel cell gas turbine hybrid systems are currently under development as the first step in commercializing this technology. The dynamic interdependencies resulting from the integration of these two power generation tec…
Dynamic birefringence and dynamic viscoelasticity of polystyrene/tricresyl phosphate solutions were measured over a wide reduced frequency region from the rubbery to the glassy zone for concentrations ranging from 0.20 g cm -3 to bulk. The rubbery (polymeric) component of the modulus whose molecular origin is attribut…
The effectiveness of the combination of thermosensitive liposomes of plumbagin and hyperthermia is described. Small-sized, thermosensitive liposomes were prepared by thin film hydration and subsequent sonication. The liposomes were characterized for size, phase transition temperature, in vitro drug release and stabili…
A model previously shown to provide physically meaningful interpretation of a wide range of polymer−penetrant relaxation-induced non-Fickian (including case II) sorption kinetics, is used here as a basis for a deeper understanding of fundamental case II kinetic features. In particular, we report and discuss model calc…
The first generation of molecular engineering studies whereby a one-dimensional bipolar donor–acceptor conjugated system had served, since the early 1970s, as a quasi-exclusive template, had failed to take into account the tensorial dimension attached to the β quadratic hyperpolarizability tensor. We review here the o…
Most EPDM applications require cross-linking, which is commonly achieved via accelerated sulphur vulcanization. Co-agent-assisted peroxide cure is applied for improving the thermal stability and/or the compression set of EPDM. Activated resol cure is only used for the dynamic vulcanization of PP/EPDM blends, i.e. for…
Temperature dependence of the electrochemical and hydrogen transport kinetic performance of metal hydride electrode have been systematically investigated in the temperature range to The results show that temperature has pronounced effects on a series of characteristics of the electrode. With the increase of temperatur…
The nuclei of spheroidal graphite (abbreviated SG) were studied using an FE-SEM and an EDS. Many kinds of SG irons with different sulfur contents were prepared for the observation of the nucleus-like core materials. The Mg-treated SG iron was cast into a thin CO2 sand mold and a chilled test piece that is usually used…
SiC/SiC continuous fiber-reinforced ceramic matrix composite (CFCC) combustor liners having protective environmental barrier coatings (EBCs) applied to the liner working surfaces have been field-tested in a Solar Turbines’ Centaur 50S SoLoNOx engine at the Chevron, Bakersfield, CA engine test site. This latest engine…
This paper describes tensile properties of a peak-aged Mg–4Y–3RE alloy at room temperature to 823 K with 10−5–10−1 s−1. The Mg alloy exhibited high strength (> 250 MPa) at room temperature to 473 K . However, the strength rapidly decreased at 573 K . It is suggested that a large decrease in strength at 573 K is attrib…
The crystal structure of a new Cu(III) complex with the ligand pds2− (pds, pyrazine-2,3-diselenolate) shows a unique packing pattern with segregated stacks of complex molecules interconnected through the pyrazine N coordination to Na counterions, which complete their coordination environment with four water molecules.