Materials Literature
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Hyperbranched polyamidoamine–grafted silica was prepared according to dendrimer synthesis methodology. The modified silica was dispersed uniformly in epoxy resin, and the curing of epoxy resin proceeded successfully by heating in the presence of the modified silica; the gel fraction of the epoxy resin cured by the hyp…
The performances of high-concentration Er/sup 3+/-doped phosphate fiber amplifiers are reported. The amplifiers are characterized in terms of gain, noise figure, and signal saturation power in a co-propagating pump configuration. A net gain of 21 dB and a gain per unit length 3 dB/cm are achieved in a 71-mm Er/sup 3+/…
composite electrodes with various molybdenum oxide content were prepared using activated carbon with high surface area by impregnation of activated carbon in methanolic solutions of The supercapacitive behavior of the composite material was characterized by cyclic voltammetry. An increase in capacitance compared to pr…
Carbodiimide cross-linking of bioprosthetic materials has been shown to provide tissue stabilization equivalent to that of glutaraldehyde cross-linking, but without the risk of the release of unreacted or depolymerized cytotoxic reagent after implantation. In this study, the effects of 1-ethyl-3-(3-dimethylaminopropyl…
Well-aligned nanowire arrays have been synthesized by anodic oxidative hydrolysis of within a hexagonal close-packed nanochannel alumina on an Au substrate. X-ray diffraction spectrum, Raman scattering spectrum, scanning electron microscopy, and transmission electron microscopy analysis show that the single-crystallin…
The limit of ultraviolet transparency of glass, in the absence of metal ion impurities such as Fe 3+ or Pb 2+ , is discussed in terms of how the glass composition drastically modifies the properties of the constituent oxygen atoms. Two distinct approaches are made, one based on band theory and the other on electronic…
A two-dimensional breakdown model based upon the continuity equations for electrons and ions and the Poisson equation is employed to examine the influence of surface charges upon the partial discharge behavior of a short metallic-dielectric plane-parallel electrode gap of 0.05 cm in an air-like mixture at atmospheric…
The approach developed previously to assign the major π → π* and π* → π* bands in the optical spectra of metallophthalocyanine radical species [ MPc (−n)] (n−2)− (n = 1–6), which was based on spectral band deconvolution analyses of the UV-vis absorption and magnetic circular dichroism (MCD) spectra and ZINDO calculati…
The cooperation between cellobiohydrolase (CBHI) and endoglucanase (EG) is necessary for biodegradation of native cellulose, but its mechanism is still poorly understood. The present paper report at the first time that an isolated component, the cellulose binding domain with its linker sequence of cellobiohydrolase I…
In this, Part I of a two-part study, a generalized model for the oxidation of the ternary compounds, where and X is carbon and/or nitrogen, is proposed. In all cases, the oxidation products in the 800-1100°C temperature range are rutile in which some Al is dissolved, i.e. , where and The oxidation occurs by the inward…
w h e re, V = Dissolution medium vo l u m e C S = Sat u rated solubility of the co m pound in the medium Sink = Sink condition facto r To increase the maximum dissolvable dose,o n e needs to increase the dissolution media vo l u m e, change the media to increase the sat u ration solub i l i ty of the co m po u n d,or…
The thermal step method (TSM) is a nondestructive technique which measures the distribution of the electric field and space charge density across solid insulating materials. This work first reviews the principle and the basic equations of the TSM when used on a short circuited flat insulating structure (film or plate)…
Gold nanoparticles have been functionalized with thiol dendrons containing three redox active amidoferrocenyl or silylferrocenyl units; using cyclic voltammetry, these dendronized gold nanoparticles recognize H2PO4-.
Wet chemistry methods known as “chimie douce” bring together organic and inorganic chemists. They offer new opportunities for the chemist’s imagination and lead to the synthesis of novel hybrid or bio-inspired materials.
This work establishes a method for obtaining the viscosity-temperature curve for glasses on the basis of the characteristic points obtained by hot stage microscopy and the comparison with the viscosity-temperature curves measured with a high temperature viscometer. Viscosity-temperature curves were determined for thre…
An all solid-state thin film supercapacitor (TFSC) was fabricated with an amorphous ruthenium oxide thin film electrode and an amorphous (Lipon) thin film electrolyte. The electrochemical behavior of the was characterized by a charge-discharge technique in the potential range of 0-2 V. The exhibited a behavior of a bu…
The reaction of Pr(NO3)3·6H2O with 4,4′-bipyridine N,N′-dioxide (L) and K3[M(CN)6] [M = FeIII, CoIII] gives isomorphous heteropolynuclear complexes with formula [{(H2O)5LPr–NC–M(CN)5 }(μ-L)]·0.5L·4H2O, which exhibit a novel supramolecular architecture created by the interplay of coordinative, hydrogen bonding and π–π…
A series of novel polymeric compounds of formula [M(btzb)3][ClO4]2 (MII = Fe, Ni or Cu) with btzb = 1,4-bis(tetrazol-1-yl)butane have been prepared and their physical properties investigated. The btzb ligand has been prepared and its crystal structure determined, together with a tentative crystal structure of the 3-D…
A series of magnesia-supported palladium catalysts (Pd loading in the range 0.5–7.0 wt.%) has been prepared by impregnation from aqueous solutions of PdCl2 , Pd(NH3)4Cl2 and Pd(CH3COO)2 and characterised by X-ray diffraction (XRD), CO chemisorption and high resolution transmission electron microscopy (HRTEM). The gas-…
The intercalation mechanism of lithium ions into graphite layers has been studied in organic solvents employing nuclear magnetic resonance (NMR) and electrochemical impedance spectroscopy (EIS) experiments. The lithium ions solvated with these solvent molecules were shown to intercalate into the graphite lattices by N…