Materials Literature
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A state variable electromagnetic (EM) analysis technique called rigorous wave coupled theory (RCWT) (used for the EM and optical analysis of planar diffraction gratings) is applied to determine the radiation and scattering that arises from phi-periodic circular cylindrical dielectric systems which have arbitrary radia…
The simultaneous determination in aqueous media of the gadolinium ion (Gd3+) and the macrocyclic chelate Gd–DOTA (DOTA = 1,4,7,10-tetraazacyclododecane- 1,4,7,10-tetraacetic acid) used in magnetic resonance imaging (MRI) is described. The proposed approach combines a reversed-phase high-performance liquid chromatograp…
Abstract Über eine gekoppelte Reaktion konnten aus Aluminiumoxid und Platin im Wasserstoffstrom bei Temperaturen um 1200°C platinreiche Aluminium‐Platin‐Legierungen synthetisiert werden. Als aluminiumreichste Phase wurde die im AuCu 3 ‐Typ kristallisierende Legierung‐ Al 1,16 Pt 2,84 erhalten. Entsprechend der Zusamme…
In the hyperthermophilic bacterium Thermotoga maritima, the two glycolytic enzymes phosphoglycerate kinase (PGK) and triosephosphate isomerase (TIM) are covalently connected forming a tetrameric single-chain PGK-TIM fusion protein. A frameshift allows the translation of PGK alone, whereas TIM activity exclusively resi…
Nous proposons dans cet article une famille d'algorithmes pour le calcul de configurations d'equilibre stables de cristaux liquides nematiques en utilisant le modele d'Oseen-Frank ou les constantes peuvent etre arbitrairement choisies. Ces algorithmes sont d'abord etudies dans un cadre abstrait puis implantes numeriqu…
This study was intended to support the development of new test technology and requirements for possible inclusion in the 1997 edition of NFPA 1971, Standard on Protective Ensemble for Structural Fire Fighting. The particular focus of this study was to examine test methods related to the thermal protection of fire figh…
A study of bench top tests for thermal protective fabrics was undertaken to answer questions about the interpretation of data from these tests, and to evaluate suggested modifications to existing tests. Fixed duration tests using either skin simulant or copper disk heat flux sensors may be a useful alternative to exis…
The coordination environments of Ti in two fully metamict zirconolite samples and two partially metamict titanite samples were determined using high-resolution, X-ray absorption near-edge structure (XANES) spectroscopy at the Ti K edge. Fivefold-coordinated Ti is the dominant Ti species in the zirconolite samples (~80…
Covalently grafting proteins with varying numbers (n) of poly(ethylene glycol) molecules (PEGs) often enhances their biomedical and industrial usefulness. Partition between the phases in aqueous po ...
The magnesium alloys are high in specific strength. Mg-Al-Zn alloys, in particular, have the excellent balance between strength and ductility. A magnesium alloy containing over 5% aluminum yields the cellular structures through the grainboundary reaction. AZ91D is modified for the heat treatment with killing the gaseo…
The purpose of this work is to present thermoelectric and mechanical properties of Bi-Te polycrystalline materials. Semiconducting ceramics of p- and n-type bismuth telluride were prepared by a hot press method. High purity row materials of Bi, Sb, Te and Se were used for the alloy preparation and the sample with a di…
Some Unusual Reactions of Disodium 2-Oxo-1,3-dithiole-4,5-dithiolates with Biselectrophiles Reaction of disodium 2-oxo-1,3-dithiole-4,5-dithiolate (3) with dichloro-maleic anhydride (4), Mucobromic acid (7) and its pseudoester 9 leads to the formation of the 1,3-dithiolo[4,5-b]-1,4-dithiins 6, 8 and 10. 3 condenses wi…
The influence of the 1-adamantyl group on the structure and the proton transfer dynamics of N-unsubstituted pyrazoles has been determined. Four compounds have been labelled with 15 N and studied by variable temperature 15 N CP MAS NMR spectroscopy: 3(5)-(1-adamantyl)pyrazole 2, 4-(1-adamantyl)pyrazole 3, 3,5-dimethyl-…
The transconductance of an electrochemical transistor-like sensor device derived from coating and connecting three closelyspaced microelectrodes with polyaniline film has been shown to be effectively controlled by an electrocatalytic reaction (e.g. SO2 oxidation in acid media) occurring at the surface of the electropo…
A lateral test structure with metalized film electrodes is shown to have distinct advantages over a conventional solid electrode structure for studying the HV characteristics of solid insulators in vacuum. The paper presents results of streak photography and spectral analysis of surface discharge luminosity, and of pr…
On présente une théorie des phases condensées formées d'objets uniaxes basée sur l'hypothèse que le désordre orientationnel est, à toute température, un phénomène essentiellement collectif, associé à des modes visco-élastiques thermiquement excités. Sous cet aspect, cette théorie peut être considérée comme une général…
The optical properties of amorphous Ga20Se80−xBix (a-Ga20Se80−xBix) thin films (where x = 0, 5, 10, 15 and 20) have been studied in the wavelength range (450-1400 nm). It is found that the optical bandgap decreases with increasing bismuth content in the a-Ga20Se80−xBix system. The value of the refractive index n decre…
These proceedings publish about eighty papers presented at the symposium. They are spread over four main subjects: binder properties, mixture properties, mix design and field topics. In addition the first chapter is devoted to the analyses of the RILEM TC (Technical Committee) inter-laboratory tests. Recommendations a…
Emulsions can improve the emollient property of lipsticks because of the introduction of hydrophilic ingredients. A lipophilic emulsifier (Span 60 or Span 80) or a hydrophilic emulsifier (Tween 20) was used to prepare emulsion lipsticks. The experimental results show that a hydrophilic emulsifier is as good as a lipop…
The fracture toughness and fatigue crack growth properties of carbon steel (S35C) were investigated in 1.1MPa argon gas and in high pressure hydrogen gas up to 9.9MPa at room temperature. The effect of hydrogen on the crack growth was discussed. The results obtained are as follows;(1) JIH value in hydrogen was smaller…