Materials Literature
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Transient electromagnetic fields produced by supply voltage application in an electromechanical converter with nonlinear solid core containing thin radial slots have been investigated. Electric circuit equations and the equation of motion of some core parts have also been dealt with. The electromagnetic field is consi…
Abstract Die Kinetik der Auflösung und der Passivierung von Legierungen des Typs FeCrXCuY (X = 5; 7; 9; 11%; Y = 0; 0,5; 1%) wurde an rotierenden Scheibenelektroden (RDE) sowie an hydrodynamisch modulierten rotierenden Ring‐Scheiben‐Elektroden (HMRRDE) in 1 N H 2 SO 4 (pH 0,3) bzw. 0,5 M Na 2 SO 4 (pH 3) untersucht. N…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation W. H. Han, A. D. Rey; Simulation and validation of nonplanar nematorheology. J. Rheol. 1 Septembe…
The impression creep behaviour of acrylonitrile-butadiene-styrene (ABS) polymers with various butadiene contents was investigated under punching stresses of 10–120 MPa and at temperatures from 330 to 390 K (Tg = 376 K). It was found that the creep resistance of the ABS polymers decreased with increasing butadiene cont…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of Cyclo- and Polyphosphazenes with Pyridine Side GroupsUrsula Diefenbach and Harry R. AllcockCite this: Inorg. Chem. 1994, 33, 20, 4562–4565Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published inissue 1 September 1994ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of O-(2'-Bromopropionyl)glycolic Acid and Its Polymerization: Synthesis of an Alternating Lactic and Glycolic Acid CopolymerNelson W. RebertCite this: Macromolecules 1994, 27, 20, 5533–5535Publication Date (Print):September 1, 1994Publication History Published onli…
Manufacturers and users of transformers are nowadays capitalising the core losses while considering the costings. Therefore a software package which enables an engineer to predict within a short period the approximate core loss in a transformer of any rating and geometry will be very useful. This paper describes how s…
Reconstruction of a clean surface of a platinum catalyst and a platinum surface covered with gold during ammonia oxidation was studied by SEM observations. It was found that the process of catalytic etching had two sequential stages in which different crystal structures with different rates of growth formed on the sur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSorption and Dilation of Poly(1-(trimethylsilyl)-1-propyne) by Carbon Dioxide and MethaneD. S. Pope, W. J. Koros, and H. B. HopfenbergCite this: Macromolecules 1994, 27, 20, 5839–5844Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Publ…
Abstract Electrospray mass spectrometry has been applied to ionic inorganic systems such as heteropolyacids in methanol + water (1/1) or acetonitrile + water (1/1) solutions. Negative‐ion mass spectra were obtained on four different heteropolyacids. Heteropolymolybdates H 3 PMo 12 O 40 and H 4 PMo 11 VO 40 and heterop…
Abstract The effect of the support in constraining the formation and defining the structure of bimetallic particles has been considered. Alumina and NaY zeolite supported platinum and cobalt bimetallic catalysts are illustrated to rationalize this effect. The surface composition and dispersion of the bimetallic partic…
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The structure and electronic state of fine Pt particles on the carbon electrode were investigated by XANES and extended x‐ray absorption fine structure (EXAFS) spectroscopies. The white line intensities were processed into the parameter representing the density of unoccupied 5d state. They were described as kinds of v…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalyst Influence on the Molar Mass Distribution of Hydrolyzed (3-Glycidoxypropyl)trimethoxysilane and (3-Methacryloxypropyl)trimethoxysilaneKarin Piana and Ulrich SchubertCite this: Chem. Mater. 1994, 6, 9, 1504–1508Publication Date (Print):September 1, 1994Publication His…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical and Spectroelectrochemical Investigations of [(TpTP)MvL2]+Cl- Where TpTP Is the Dianion of Tetra-p-tolylporphyrin, M = P or Sb, and L = Cl- or OCH3-Y. H. Liu, M.-F. Benassy, Stephen Chojnacki, Francis D'Souza, Tanya Barbour, Warwick J. Belcher, Penelope J. Br…
Abstract X-Ray analyses revealed that bis(hexafluoroacetylacetonato)manganese(II) forms with 1-[3- and 4-(N-tert-butyl-N-oxyaminophenyl)]imidazoles cyclic dimer complexes in cis coordination. The long-range magnetic couplings between the two spin 4/2’s resulting from the strongly antiferromagnetic short-range interact…
This paper deals with magnetostatic element formulations for modelling narrow gaps in an iron core, as well as thin iron shells. These special elements have been developed for gaps in transformers or motors. Nodal elements are used with magnetic scalar potentials as state variable. The principle and the formulations o…
Threonine dehydratase is the key enzyme in L-isoleucine synthesis, since it is allosterically feedback-inhibited by L-isoleucine. With the aim of obtaining regulatorily altered mutants of the threonine dehydratase of Corynebacterium glutamicum, amino acids were specifically exchanged and a new biological system of mut…
The improved T-/spl Omega/ method is applied to the computation of the three dimensional eddy current field in a 360 MVA/500 kV large power transformer, the structure of which is complicated. The different cases of tank wall with magnetic shunt, aluminium screen or without any shield are analyzed. The relations betwee…
Accurate X-ray integrated-intensity data collected from an extended-face crystal of GaAs are analysed to provide detailed information on the thermal vibrations of atomic species, including cubic anharmonicity, at room temperature. The values obtained for the thermal parameters are BGa = 0.622 (3) Å2, BAs = 0.483 (5) Å…