Materials Literature
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Easily accessible liquid crystals of 1-alkylimidazolium salts having a bilayer structure, are good solvents providing a partially ordered reaction environment.
This perspective on blood- materials interactions is intended to introduce the set of papers stemming from the symposium, "Devices and Diagnostics in Contact with Blood: Issues in Blood Compatibility at the Close of the 20th Century," organized on August 4-6, 1999 at the University of Washington by the University of W…
Little data exist on how twist changes the properties of high-performance continuous fiber yarns. For this reason, a study was conducted to determine the influence of twist on the strength and stiffness of a variety of high-performance continuous polymeric fiber yarns. The materials investigated include Kevlar 29®, Ke…
A novel partial discharge (PD) defect identification method is described. Starting with PD data on different families of specimens, a suitable set of parameters are determined and then used as input variables to a neural network for the purpose of identifying the defects within the insulation. In this procedure the st…
Low molecular weight Poly(ethylene glycol) (PEG) (< 20,000)-drug conjugates, prepared over a 20-year period, have been scrutinized and their properties and efficacy reviewed. No commercial products have thus far been reported for these types of compounds. However, during the past 5 years a renaissance in the field of…
The objective of this paper is to compare the performance of thyristor-controlled reactors (TCR) and shunt-connected PWM voltage source inverters (PWM-VSI) for compensation of flicker caused by arc furnaces. First of all, arc-furnace principles are presented in order to explain the main characteristics of the problem.…
Palladium(II)-supported hydrotalcite acts as a reusable catalyst for the oxidation of alcohols to aldehydes and ketones in the presence of pyridine under atmospheric pressure of oxygen.
Chemical-surface modification of coir fibers was done by dewaxing, using an alkali treatment (5% and 10% NaOH), vinyl grafting with methyl methacrylate (MMA) and cyanoethylation. The chemically modified fibers were characterized by Fourier transform infrared (FTIR) spectroscopy. In addition, the surface features of un…
The crystal structures of two forms of the enzyme dimanganese catalase from Thermus Thermophilus (native and inhibited by chloride) were studied by X-ray diffraction analysis at 1.05 and 0.98 Å resolution, respectively. The atomic models of the molecules were refined to the R factors 9.8 and 10%, respectively. The thr…
Alkanethiolate-protected gold nanoclusters are solublized through place exchange reaction with ω-thiocarboxylic acids.
The anodic behavior of ( S‐phase ) samples in 0.1 M NaOH solution was investigated. Critical potential behavior typical of dealloying was observed while sweeping the potential from open circuit in the anodic direction. Theoretical estimates based on curvature effects in alloy dissolution suggested the development of a…
NMR on ${}^{57}\mathrm{Fe}$ nuclei was measured in two single crystals of magnetite between 4.2 and 135 K (temperature of the Verwey transition ${T}_{V}=121.5$ and 123.9 K). We were able to register all lines detected at 4.2 K also at higher temperatures up to ${T}_{V}.$ The spectra are compatible with the space group…
Mesostructured silica functionalised with the dye moiety, (2,4-dinitrophenylamine), has been prepared with bimodal pore size distribution. Co-condensation of tetraethoxysilane and 3-(2,4-dinitrophenylamino)propyltriethoxysilane was used to covalently couple the organic chromophore into the wall structure of a silica m…
We report that ``ferroelectric relaxor'' behavior is induced by doping Bi in quantum paraelectric ${\mathrm{SrTiO}}_{3},$ and doping Ce in typical ferroelectric ${\mathrm{BaTiO}}_{3}.$ The present results show that the ``ferroelectric relaxor'' state may exist no matter whether the matrix is ferroelectric or paraelect…
The cellular silicon, nitrogen, and carbon content and the kinetics of silicic acid use were determined for Thalassiosira weissflogii grown under nutrient-replete, iron-deficient, and zinc-deficient conditions to assess the effect of metal deficiency on dlatom silicon metabolism. Iron-and zinc-deficient T weissflogi~…
Automotive emissions are severely regulated. Since 1980, a three-way catalyst (TWC) has been used to convert harmful emissions of hydrocarbons, carbon monoxide, and oxides of nitrogen into less harmful gases in order to meet these regulations. The TWC's efficiency of conversion of these gases is primarily dependent on…
The cell size of DVB–VBC PolyHIPEs decreases with increasing VBC content, which appears to be due to the adsorption of VBC at the emulsion interface leading to a lower interfacial tension and a smaller droplet size.
Research Article| January 01, 2000 Solid-Solution Solubilities and Thermodynamics: Sulfates, Carbonates and Halides Pierre Glynn Pierre Glynn U.S. Geological Survey, 432 National Center, Reston, Virginia 20192 Search for other works by this author on: GSW Google Scholar Author and Article Information Pierre Glynn U.S.…
Pt and Pd nanoparticles can be modified with surface-attached cyclodextrin receptors leading to water-soluble materials that exhibit catalytic activity for the hydrogenation of allylamine.
A new UV-blocking material consisting of cerium oxide (ceria) and turbostratic boron nitride (t-BN) has been synthesized. The surface of the ceria powders was coated with a t-BN layer by means of reaction between boric acid and urea on the surface of ceria. The thickness of the t-BN layer estimated by high resolution…