Power losses under sinusoidal, trapezoidal and distorted induction waveform
A setup has been developed by which one can measure magnetic power losses under arbitrary induction waveforms in the frequency range 1 Hz>
Materials Literature
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Diffusion of Xe in UO2
In this paper we present the results of atomistic simulation studies regarding aspects of the diffusion behaviour of Xe in UO2. The effects of a variable lattice stoichiometry and the charge state of the Xe are considered. It is found that although the sites at which Xe atoms are trapped differ markedly with stoichiom…
A novel series of heterotrinuclear complexes with a tris(dimethylglyoximato)metal( II ) anion as bridging ligand. Structure of the Fe III Cu II Fe III complex with S= 9/2 ground state
A series of linear heterotrinuclear complexes with a tris(dimethylglyoximato) metal(II) as bridging ligand, [LFeIII{µ-(dmg)3MII}FeIIIL](ClO4)2(M = Zn, Cu, Ni, Co, Fe, Mn), where L represents the cyclic triamine 1,4,7-trimethyl-1,4,7-triazacyclononane, has been synthesized and characterized by X-ray crystallography and…
Charge-transfer complexes of tetracyanoethylene with cycloalkanes, alkenes, and alkynes and some of their aryl derivatives
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharge-transfer complexes of tetracyanoethylene with cycloalkanes, alkenes, and alkynes and some of their aryl derivativesJohn E. Frey, Anne M. Andrews, Daniel G. Ankoviac, Douglas N. Beaman, Louis E. Du Pont, Thomas E. Elsner, Susan R. Lang, Marian A. Oosterbaan Zwart, Rona…
Solubility of hydrogen in metals
Abstract
Thermodynamic investigation of the CaO-Al_2O_3-CaCO_3-H_2O closed system at 25℃ and the influence of Na_2O
The solubilities of calcium hemicarboaluminate, calcium monocarboaluminate and calcium tricarboaluminate have been determined and the equilibrium phase diagram for the CaO-Al 2 O 3 -CaCO 3 -H 2 O closed system at 25°C has been calculated. Six isothermally invariant points have been located involving six stable hydrate…
A facile preparation of a self-doped conducting polymer
A self-doped conducting polymer having alkanesulphonic acid groups on polythiophene has been directly synthesized from sodium 3-(3-thienyl)propanesulphonate 3 by chemical polymerization with FeCl3 in an aqueous medium; the resulting acid form of this polymer after work-up shows highly self-doped behaviour both in wate…
4,10-Dinitro-2,6,8,12-tetraoxa-4,10-diazatetracyclo[5.5.0.05,903,11]dodecane
Glyoxal condensed with 1,4-diformyl-2,3,5,6-tetrahydroxypiperazie in the presence of sulfuric and nitric acids to give the title compound.We wish to repon 4.10-diniuo-2,6,8,12-letraoxa-4,lO-diazatetracyclo[5.5.0.~~~O~~'~ldodecan (2) as the fxst example of a dioxaazepane and the densest dinitramine (including dinitrami…
Kinetics of diamagnetic phase transitions
The kinetics of first-order diamagnetic phase transitions into a Condon domain phase, which may occur in normal metals under a strong magnetic field, is considered. Expressions for profile, velocity, and width of the interface between the homogeneous and diamagnetic domain phase are obtained. Critical sizes of cluster…
Fission gas release during post irradiation annealing of BWR fuels.
Uranium dioxide fuels irradiated in a commercial BWR during 1 to 4 cycles (burn-up: 6–28 GWd/t) have been annealed in an out-of-pile condition and the release rate of 85Kr was measured continuously. The annealing temperature ranged 1,500–1,800°C. The effects of temperature and burn-up have been studied on burst releas…
The influence of morphology on electrical tree initiation in polyethylene under AC and impulse voltages
AC and impulse voltages were applied to needle electrode specimens modeling the interface of the semiconducting layer and insulation of XLPE (cross-linked polyethylene) cables. TEM (transmission electron microscope) photographs of minute trees (>
Structure and behaviour of Ru3(CO)12 supported on inorganic oxide surfaces, studied by EXAFS, infrared spectroscopy and temperature-programmed decomposition
The structure and behaviour of Ru3(CO)12 supported on inorganic oxides such as V2O5, SiO2, TiO2, Al2O3, K-Al2O3, MgO and MnO2 have been studied by means of EXAFS, IR and TPD. Ru3(CO)12 was physisorbed on V2O5, SiO2, and TiO2, whereas [Ru3(CO)10(µ-H)(µ-O)] and [HRu3(CO)11]– were formed on Al2O3 and the basic supports M…
Synthesis and properties of biodegradable aliphatic polyesters
Abstract The ring‐opening polymerization of D, L ‐dilactide and an equimolar dilactide‐diglycolide mixture has been investigated. Conversion and molecular weight in the lactide bulk polymerization are determined not only by the kinetics of the primary ring‐opening reaction, but also by the concentration and extent of…
Active form of 12-vanadomolybdophosphoric acids in n-butane selective oxidation
The catalytic behaviour of H5PV2Mo10O40 heteropoly acid in the oxidation of n-butane to maleic anhydride is analysed in relation to that of its partially salified Cs salt and their FTIR spectra, UV–VIS diffuse reflectance spectra, thermogravimetry and reducibility tests as well as solid state 51V NMR and EPR character…
Detection of partial discharges (Corona) in electrical apparatus
The development of the various partial-discharge test methods as applied to cables, capacitors transformers, and rotating machines is examined in an historical context. Special emphasis is placed on various discharge pulse analysis techniques, although it is pointed out that integrated charge measurements should recei…
Corrosion Between a Graphite/Polymer Composite and Metals
A graphite/polymer composite material was directly coupled with: 2014 aluminum (bare and hard-anodized), pure grade titanium, 316 stainless steel and monel. Samples were then immersed in natural seawater. The titanium couple was inactive. Stain less steel and monel changed behavior from noncorroding to crevice and pit…
Catalytic and asymmetric oxidation of sulphides with iron complexes of chiral ‘twin coronet’ porphyrins
Iron porphyrins that are modified on both faces by chiral binaphthalenes catalysed asymmetric oxidation of sulphides in fair to good enantiomeric excesses and excellent turnover numbers of the catalysts in the presence of 1-methylimidazole.
Kraft lignin in polyurethanes. III. Effects of the molecular weight of PEG on the properties of polyurethanes from a kraft lignin–PEG–MDI system
Abstract Polyurethane (PU) films were prepared by solution casting using a three‐component system consisting of a low molecular weight fraction of softwood kraft lignin (KL), polyethylene glycol (PEG) of various molecular weights, and crude diphenylmethane diisocyanate (MDI) as starting materials. All films were prepa…
The Illite/Smectite Geothermometer—Concepts, Methodology, and Application to Basin History and Hydrocarbon Generation
Abstract Clay minerals provide information on the burial and thermal history of sedimentary rocks that is useful in the exploration, evaluation, and production of hydrocarbons. In particular, changes in clay minerals may be used as geothermometers that record temperatures corresponding to various stages of hydrocarbon…
In situ structural studies of the passive film on iron and iron/chromium alloys using X-ray absorption spectroscopy
The structure of the passive film that protects iron and iron/chromium alloys from corrosion has been investigated in situ in an aqueous environment using X-ray absorption spectroscopy, with fluorescence yield detection. From an analysis of the EXAFS and XANES it has been shown that the film formed on iron consists of…