Materials Literature
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The behavior of methoxy species on dimethyl ether (DME) adsorbed CeO 2 was investigated using temperature-programmed desorption (TPD) and infrared (IR) spectroscopy. TPD experiments showed that the thermal desorption peaks at 470−500 and 570 K are all DME from DME/CeO 2 adsorbed at 300 K. These DME desorptions are att…
The porosity, composition, and temperature dependence of thermal properties in porous Ni/yttria-stabilized zirconia (YSZ) cermets has been investigated at high temperatures by the laser flash diffusivity method. At a temperature range of 1073 to 1273 K, there is no temperature dependence of thermal diffusivity of the…
Laminated metal composites (LMCs) are a unique form of composite material in which alternating metal or metal containing layers are bonded together with discrete interfaces. The mechanical properties of these materials are reviewed. The tensile properties at low and high temperatures are described. At low temperature,…
The synthesis and dopant properties of both the (R,R,R,R,R)- and (S,S,S,S,S)-hexadecyloxy{pentakis [4-(1-methylheptyloxy)-phenylethynyl]} benzene enantiomers are described. Although the materials were found not to be liquid-crystalline, it was found possible to induce left [for the (R,R,R,R,R)-enantiomer] and right ha…
Reactions of MCl3(M = As, Sb or Bi) and 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3[9]aneN3= L) gave the respective 1 : 1 adducts as white-yellow microcrystalline solids which were characterised by microanalytical and spectroscopic (IR and 1H NMR) data. Addition of water to AsCl3L under controlled stoichiometry in ac…
Cysteine is one of the 20 amino acids, and one of the two sulfur-containing amino acids. The highly reactive sulfhydryl group is often used for conjugating proteins to other entities. Furthermore, in a thin film, measurement of chemical shifts of the constituent atoms of cysteine are important in determining its inter…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTSurface Analysis: X-ray Photoelectron Spectroscopy and Auger Electron SpectroscopyNoel H. Turner and John A. SchreifelsView Author Information Chemistry Division, Naval Research Laboratory, Washington, D.C. 20375-5342 Department of Chemistry, George Mason University, Fairfax,…
A kinetic study of the solid-state reaction between the polyimide precursor monomers PMDA and ODA has been carried out in the temperature range between −50 and +23 °C, using molecular beam deposition (MBD) for film growth and transmittance infrared spectroscopy (FTIR) for reaction monitoring. The product of this react…
The aim of the present work is to study the influence of the sequential or competitive adsorption of anti-HSA (Human Serum Albumin) IgG and RSA (Rabbit Serum Albumin) onto a negatively charged polystyrene latex on the colloidal stability of the immunoiatex (IgG-RSA/latex). Anionic (1-2) latex was prepared by surfactan…
In certain applications, a reinforced composite is used as an adhesive layer. In this study, the bulk mechanical behaviour of composite films based on a poly(vinyl acetate) (PVAc) matrix and various calcium carbonate (CaCO3) fillers was investigated. The interactions depend on the morphology and chemical structure of…
Hexamethylhydrazinocyclotriphosphazene N3P3 (NMe-NH2)6 1 is a useful precursor for the synthesis of functionalized hexahydrazones (3a-f), multicyclic (5) and multimacrocyclic (7) species, and small dendrimers (8 and 10). © 1996 John Wiley & Sons, Inc.
Polymer blends, mixtures, or block copolymers can be cross-linked in a homogeneous state forming a multicomponent network. Upon cooling such network, the repulsion between different components may lead to a microphase separation into regions rich in each of these components. The main difference of the microphase separ…
Abstract The concepts of fracture mechanics are basic ideas for developing the methods of predicting the load-carrying capabilities of structures and components containing cracks. This article provides an introduction to the methodology for computing the onset of fracture and describes plane strain fracture toughness,…
The effects of surface orientation on dissolution rate of type 310S and Alloy 600 single crystals were investigated by potentiostatic etching in the active region in H2SO4–NaCl solution. (100) and (111) planes were prepared by cutting at the given angles of single crystals. The dissolution rate changed with etching po…
In order to evaluate the thermal conductivity of oxidized fuel pellets of leaker fuel rods, UO2+x samples with x between 0.00 and 0.20 were prepared by an oxidation or a sintering method. Sample thermal diffusivities were measured by using a laser flash method from 300 to 1,400 K and their thermal conductivities were…
P. T. Gallagher, Contemp. Org. Synth., 1996, 3, 433 DOI: 10.1039/CO9960300433
A method is presented for the preparation of stable model dispersions of paramagnetic silica particles. A specially designed silane coupling agent containing Ni 2+ ions is grafted onto silica particles which are either commercially obtained or prepared by the Stöber synthesis. A wet process is described which avoids a…
BACKGROUND: To develop a new green approach for biosynthesis of silver nanoparticles, myconanotechnology has been represented as a novel field of study in nanotechnology. In this study, we have reported the extracellular synthesis of highly stable silver nanoparticles using three species of dermatophytes: Trichophyton…
Crystals of 2,4,6-trinitrotoluene (TNT) have been grown from a wide range of organic solvents under various conditions. The structural nature and morphology of these crystals were systematically characterised using a number of techniques. The crystals were found to exist in two basic forms having monoclinic and orthor…
This paper presents the main kinetic parameters for aluminothermic reduction of MnO2 and Fe2O3. Aluminothermic reduction which in fact is a redox reaction requires an initial input of heat which is obtained through external reaction and/or oxidation of aluminium. In a system where oxidation as well as reduction take p…