Materials Literature
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Dendrimers based on polyhedral oligomeric silsesquioxanes (POSS) cores with 16 PPh2 arms give much higher linear selectivities (14∶1) than their small molecule analogues (3–4∶1) in the hydroformylation of oct-1-ene.
The database reported here is derived using the Combinatorial Extension (CE) algorithm which compares pairs of protein polypeptide chains and provides a list of structurally similar proteins along with their structure alignments. Using CE, structure-structure alignments can provide insights into biological function. W…
A simple one-pot synthesis of size and shape controlled ZnTe nanocrystals using a monomeric molecular precursor, [Zn(TePh)2][TMEDA], has been studied by varying the growth temperature or the templating surfactants.
The polycrystalline La1−xCexMnO3 manganites do not exist in single phase in bulk under the preparation conditions so far employed, but their polycrystalline and epitaxial films deposited by the pulsed laser deposition (PLD) technique form readily in single phase. The cerium oxide (CeO2) remains partially unreacted whe…
We present evidence in favor of the possibility of treating an out-of-equilibrium supercooled simple liquid as a system in quasiequilibrium. Two different temperatures, one controlled by the external bath and one internally selected by the system, characterize the quasiequilibrium state. The value of the internal temp…
A new method for the quantitative determination of the hydrosilylation inhibitor 1-ethynyl-1-cyclohexanol in a poly(dimethyl siloxane) matrix is presented. The method is based on headspace gas chromatography directly from the semisolid sample without solvent addition. The method was found to be both selective and sens…
Дан обзор результатов по постановке и решению задач изгиба и задачи оптимизации конструкции упругого элемента протеза стопы. Протез моделируется в виде консольно закрепленной многолистовой рессоры с искривленными в естественном состоянии листами. Между листами имеет место контакт с возможным отставанием; задача изгиба…
To clarify the delamination mechanism of high-voltage coil insulators made from mica flakes and epoxy resin due to static mechanical stress, the relationships between the shear strength of the insulator and the physical properties of the component materials were studied. The mechanism of their delamination was thought…
Haruhiko, F. (2001). Notomi Kaijiro: An Industrial Art Pioneer and the First Design Educator of Modern Japan. Design Issues, (2), 17. doi:10.2307/1511873
The Jominy end-quench test is used to measure the hardenability of a steel, which is a measure of the capacity of the steel to harden in depth under a given set of conditions. This article considers the basic concepts of hardenability and the Jominy test.
The morphology of barium sulfate (BaSO4), synthesized using the hydrothermal reaction of BaII–aminocarboxylate chelating precursors, was investigated. The precursors ethylenediaminetetraacetic acid (EDTA), bis(2-aminoethyl)ethyleneglycoltetraacetic acid (EGTA) and nitrilotriacetic acid (NTA) were dissolved by heating,…
This paper discusses methods to minimise density gradients in moulded rigid polyurethane foams of densities 0.35 g/cc and 0.80 g/cc. Methods examined were changing the nature and concentration of the amine catalyst, the use of high functionality isocyanates and varying the mould temperature. All methods can reduce the…
© 2001 The Electrochemical Society. All rights reserved.
Une loi de distribution d’orientation aléatoire des fibres du composite SMC R42 a pu être établie par une analyse d’images des structures au MEB. Cette distribution explique les modestes caractéristiques mécaniques du matériau et en l’occurrence une limite d’endurance à 106 cycles voisine de 60 MPa déterminée expérime…
The fractal characteristics of dendrite and cellular structure of nickel-based superalloy K5 are investigated under directional solidification. Results show that the fractal dimension of the dendrite increases from 1.228 to 1.418 as the withdraw speeds change from 40 to 264 µm/s, whereas the fractal dimension of the c…
The dielectric spectra of CuInP2Se6, a new ferroelecric, is presented. Dielectric dispersion caused by diffuse soft modeis observed above 1 MHz. The soft mode softens down to 0.7 GHz at the phase transition temperature Tc = 234 K.
Research Article| January 01, 2001 Molecular Dynamics Simulations of Silicate Glasses and Glass Surfaces Stephen H. Garofalini Stephen H. Garofalini Department of Ceramics and Materials Engineering Rutgers University Piscataway, New Jersey, 08854, U.S.A. Search for other works by this author on: GSW Google Scholar Aut…
The miscibility and crystallization behavior of poly(ether ether ketone ketone) (PEEKK)/poly(ether imide) (PEI) blends prepared by melt-mixing were investigated by differential scanning calorimetry. The blends showed a single glass transition temperature, which increased with increasing PEI content, indicating that PE…
While Vortex Spinning is hailed as a revolutionary new technology it can also be viewed as a natural development in the technology of fasciated yarn production. From the earliest inception of fasciated yarns it was evident that there were limitations, which precluded its wide acceptance. From an understanding of the f…
Metal deposition and dissolution on diamond and diamond-like materials have different characteristics than on metallic electrodes and typical graphitic carbons. The behavior of copper on the recently developed tetrahedral amorphous carbon incorporating nitrogen (taC:N) film materials is addressed with quantitative spe…