Materials Literature
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Calcined Mg-Al hydrotalcite (Mg/Al = 4) has been conveniently employed as a heterogeneous base catalyst in the synthesis of 2-amino-3-cyanothiophenes adopting a one pot Gewald aminothiophene methodology.
Considerable interest has been generated in the use of lignocellulosic fibers and wastes (both agricultural and wood based) as fillers and reinforcements in thermoplastics. In general, present technologies limit fiber loading in thermoplastics to about 60 percent by weight of fiber. To produce high fiber content compo…
Hydrosilylation reactions have been used to functionalise the exterior surfaces of octavinyloctasilsesquioxane molecules to provide routes to octaaldehyde molecules. These have been characterised by NMR and MALDI (matrix assisted laser desorption/ionisation)-TOF mass spectroscopy. Further reactions of the molecules to…
In this paper focus is given to the insulation co-ordination of a closed system with integrated surge arresters. The calculations of transient overvoltages are made with typical applications of the integration of GIL in the 400 kV net of overhead lines. The overvoltages in the system are calculated and discussed for s…
A mannose isomerase from Agrobacterium radiobacter M-1 (formerly Pseudomonas sp. MI) was purified to electrophoretic homogeneity and characterized. A cell-free extract was separated by ammonium sulfate fractionation, Butyl-Toyopearl 650M, DEAE-Sepharose and hydroxylapatite column chromatography. Its molecular mass was…
Local modifications to the electronic structure during the bending deformation of carbon nanotubes are probed by in situ electron energy-loss spectroscopy. Reversible changes in the carbon K(1s) absorption near-edge fine structures are detected at the inner bending side for a multiwalled carbon nanotube and attributed…
This paper explores the solubility process from a number of perspectives, including the second law of thermodynamics and ideal solubility, real solutions and activity coefficients, intermolecular forces, and theories of gases or liquids or solids dissolving in liquids.
Breast cancer marker T-antigen (Gal(β1-3)αGalNAc) was prepared as an allyl glycoside that was transformed into an active ester and coupled to a series of poly(amidoamine) dendrimers showing strong binding to mouse monoclonal IgG antibodies and serving as useful coating antigens in microtiter plates.
Aldehyde oxidase is a molybdenum-containing enzyme distributed throughout the animal kingdom. Although this enzyme is capable of metabolizing a wide range of aldehydes and N-heterocyclic compounds, there is no reported detailed study of physicochemical requirements of the enzyme-substrate interactions. The aim of this…
Carotenoid assemblies were produced by aqueous dilution of ethanolic solutions. UV/VIS and CD spectroscopy revealed the formation of J- and H-types of aggregates of both right- and left-handed kinds. Simulation of UV/VIS spectra of the aggregates showed characteristic differences between the two types. 6'-Epimers of c…
This study describes a visualization and data analysis method for quantitatively analyzing the migration behavior of staple fiber yarns. The fiber migration of ring spun yarns with different levels of twist is measured and analyzed, and the results confirm the usefulness of the proposed method. The analysis shows repr…
Domain switching behavior is studied under pulse field conditions in (1−x)Pb(Zn1/3Nb2/3)O3–xPbTiO3 single crystals oriented at various crystallographic directions. The activation energy, critical field, and domain wall mobilities are determined from simple methods earlier employed to ferroelectric single crystals by M…
Rice husk flours were analyzed by chemical composition and thermogravimetric methods in nitrogen atmosphere to discuss its feasibility as a raw material for manufacturing agricultural lignocellulosic fiber-thermoplastic polymer composite. It was revealed in the chemical composition analysis that rice husk flour was co…
A polycrystalline BaTiO3 bulk ceramic with a preferred ‹111› orientation was fabricated by the reactive templated grain growth method. A green compact was made by tape-casting of slurry containing plate-like Ba5Ti17O40 template particles and BaCO3 powder. Single phase BaTiO3 was obtained by calcining the green compact…
A brief review of silicon etching and electrochemistry provides an introduction to galvanic cell formation in silicon/metal contacts in aqueous electrolyte solutions. It is shown that such gal- vanic cells, which operate under open-circuit conditions, can be used to perform most of the functions of anodic etching and…
In situ high temperature EPR measurements of the growth of the signal of substitutional Fe(III) ions have been used to study the diffusion of Fe in the rutile form of titanium dioxide. Two preparations, characteristic of the two main processes employed for the production of titanium dioxide have been studied. The firs…
Poly(ethylene-2,6-naphthalene dicarboxylate) (PEN), a new aromatic polyester, presents high-performance physical and chemical properties and may be considered as a worthy substitute for polyethylene terephthalate (PET). Dynamic dielectric measurements were performed under isochronal conditions for twelve different fre…
This paper presents a methodical and comparative survey of magnetic force calculation methods found in literature and their relations. Further, on the basis of their physical background and of the force distributions they produce, some remarks on the use of these methods for calculating the deformation of magnetized m…
Single crystals of the sialon Ce N-phase Ce3Si8 − xAlxN11 − xO4 + x (x ≈ 1.75) were obtained via a novel route, i.e. by first preparing a fully compacted body with phase constitutions far away from thermal dynamic equilibrium by means of a fast densification technique, spark plasma sintering, and then heat treating th…
A method for representing structures of laminated electric steel is investigated. The average behavior of laminates, including eddy current effects, is approximately represented using a rate-dependent constitutive law. The accuracy of the method is studied by comparing the homogenized description with finite differenc…