Materials Literature
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Acoustic techniques are accepted generally for diagnostics of gas-insulated systems (GIS). This paper addresses the problem of risk assessment of moving particles. The main part of the paper gives a general understanding of internal particle movement and excitation of external acoustic signals, leading to signature an…
We studied the physicochemical, piezoelectric and dielectric properties of collagen–chitosan films, with regard to the development of new biomaterials which have potential applications in the coating of cardiovascular prostheses, support for cellular growth and in systems for controlled drug delivery. The piezoelectri…
The high proton conductivities of doped barium and strontium cerates has led to their consideration as electrolytes in fuel cells operating at intermediate temperatures (600-800°C). The electrochemical properties of Pr-doped barium gadolinium cerate [ Ba ( Ce 0.8 − y Pr y Gd 0.2 ) O 2.9 ] have been investigated as par…
Abstract—We have constructed mimetic finite difference methods for both the TE and TM modes for 2-D Maxwell’s curl equations and equations of magnetic diffusion with discontinuous coefficients on nonorthogonal, nonsmooth grids. The discrete operators were derived using the discrete vector and tensor analysis to satisf…
All articles of this category Catalytic enantioselective Baeyer-Villiger oxidations of 3-substituted cyclobutanones with cumene hydroperoxide as oxidant have successfully been performed in the presence of chiral magnesium catalysts. The combination of enantiopure BINOL and a variety of Mg reagents is able to promote t…
Copper corrosion rate and corrosion products originating from acetic acid vapors have been studied using gravimetric, scanning electron microscopy, X-ray photoelectron spectroscopy, and argon-ion sputtering techniques. Copper specimens were exposed to the action of 10, 100, and 300 ppm acetic acid vapors generated in…
Compositionally homogeneous indium tin oxide (ITO) ceramics with low porosity were obtained successfully by sintering hydrothermally prepared powders. The fabrication technique began with the preparation of microcrystalline, homogeneously tin‐doped (5 wt%) indium oxyhydroxide powder, under hydrothermal conditions. Low…
A new rate law for the growth of anodic passive films on metal surfaces is derived from the point defect model (PDM). The model recognizes both the growth of the barrier oxide layer into the metal via the generation of oxygen vacancies at the metal/film interface and the dissolution of the barrier layer at the film/so…
In this research, the carbides of as-cast AISI M7 high-speed steel, in which different amounts of V and W were replaced by equivalent Ti and Nb, were investigated using light and electron microscope. EDX and WDX analysers were used in order to recognize the type and formulae of carbides. The volume fractions of each t…
The influence of the polymerization time and rate as well as the solution's ionic strength on the morphology, conductivity, and molecular structure of the polypyrrole (PPy) microtubule [synthesized by the template-free method in the presence of β-naphthalene sulfonic acid (β-NSA) as the dopant] were investigated. It w…
An esterase hydrolyzing phthalate esters has been purified from Micrococcus sp. YGJ1. The enzyme, a monomeric protein (Mr = 56 kDa) with a pI of 4.0, hydrolyzes various aliphatic and aromatic carboxylesters. The medium chain (C3-C4) esters are the most preferred substrates. The enzyme is inhibited by HgCl2 and p-chlor…
Characteristic dark domains are observed around the tips of electrodes in in-plane switching-mode liquid crystal displays. In these domains, the liquid crystal molecules rotate in the reverse direction because of the radially distorted electric field. We found that these domains extend toward the central area when a h…
In Sweden, high level radioactive waste will be disposed of in a canister with a copper outer and a cast iron or carbon steel inner. If the iron insert comes into contact with anoxic geological water, anaerobic corrosion leading to the generation of hydrogen will occur. This paper presents a study of the anaerobic cor…
CdS nanoparticles have been synthesised by thermolysing Cd(SCNHNH2)2Cl2 in tri-n-octylphosphine oxide (TOPO) at 230 °C. The optical properties and structural characteristics of the particles are reported.
Superplastic behavior was examined in fine-grained (∼2 \\micron) WE43 magnesium alloy, that contained, within its grains, spherical precipitates with a diameter of ∼200 nm. The material exhibited superplasticity with an elongation-to-failure of over 1000% at a temperature of 673 K and a strain rate of 1×10−4 s−1. Larg…
Electrochemical oxidation of PTMA[MIII(Pc)(CN)2] (PTMA = phenyltrimethylammonium, Pc = phthalocyaninato, and M = Co or Fe) gives partially oxidized salts (PTMA)x[MIII(Pc)(CN)2]·y(solvent) (solvent = acetonitrile or acetone). The obtained crystals in which the solvent molecules partially occupy the cationic sites are i…
Regenerated cellulose (RC)/alginic acid (AL) blend membranes were satisfactorily prepared from 6 wt % NaOH/4 wt % urea aqueous solution by coagulating with 5 wt % CaCl2 aqueous solution, and then treated with 3 wt % HCl. Morphology, crystallinity, mechanical properties, and thermal stability of the membranes were inve…
Electrode Reaction of La1 − x Sr x CoO3 − d Cathodes on La0.8Sr0.2Ga0.8Mg0.2 O 3 − y Electrolyte in Solid Oxide Fuel Cells , Horita, Teruhisa, Yamaji, Katsuhiko, Sakai, Natsuko, Yokokawa, Harumi, Weber, André, Ivers-Tiffée, Ellen
The effect of adding dilute electrolytes to the synthesis of non-ionically templated [Si]-MSU-X mesostructures has been investigated. An assembly process, (N0M+)(X−I0), is described that takes into account both the non-ionic template/electrolyte and the silicate/electrolyte interactions. Monovalent cations (H+, Li+, N…
Research Article| January 01, 2001 Zeolites in Soil Environments Douglas W. Ming; Douglas W. Ming Mail Code SN2, NASA Johnson Space Center, Houston, Texas 77058 Search for other works by this author on: GSW Google Scholar Janis L. Boettinger Janis L. Boettinger Department of Plants, Soils, and Biometeorology, Utah Sta…