Materials Literature
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Addition of iron sulfate to Pt-promoted tungstated zirconia increases the activity and selectivity of the catalyst for isomerization of n-pentane in the presence of H2; selectivities >98% have been observed.
Polypyrrole (PPy)/ion-conducting polymer electrolyte (PE) composites are prepared by in situ electropolymerization of pyrrole in a solvent-free PE matrix which is formed by photocross-linking of triacrylated poly(ethylene oxide- co -propylene oxide) (TA). X-ray photoelectron spectroscopy measurements reveal the gradie…
The characterization of the structure of mumbaistatin (1), an effective inhibitor of the glucose-6-phosphatase system (EC 3.1.3.9), is reported. Isolation of mumbaistatin from cultures of Streptomyces sp. DSM 11641 was achieved by anion-exchange and reversed-phase chromatography. The acid-labile inhibitor was methylat…
While for intercalation compounds of natural smectites 2D long range order of the interlamellar space was never observed, in-plane order can be detected using a homogeneously charged synthetic fluorohectorite as host material. With these intercalates distinct 2D structures for enantiopure and racemic [Ru(bpy)3]2+-inte…
The dynamics of excited state indole–(NH 3 ) n clusters has been investigated with two-color two-photon ionization. Mass spectra recorded with delayed ionization indicate that a hydrogen transfer reaction indole(S 1 )–(NH 3 ) n → C 8 H 6 N • + NH 4 (NH 3 ) n – 1 occurs for n = 3, 4, 5.
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…