F. Schucht、A. Dascoulidou、Ralf Müller 等 7 位作者1999-01-01Zeitschrift für anorganische und allgemeine Chemie
An den Alkalimetall-Manganpnictiden KMnP, RbMnP, CsMnP, RbMnAs, KMnSb, KMnBi, RbMnBi und CsMnBi wurden Messungen der magnetischen Suszeptibilität sowie Neutronenbeugungsexperimente zur Bestimmung der Spinstrukturen und der magnetischen Momente des Mangans durchgeführt. Alle Verbindungen ordnen antiferromagnetisch. Für…
Synthesis and characterization of novel inorganic/organometallic compoundsIron-based superconductors researchInorganic Chemistry and Materials
Yutaka ISHIGAMI、Midori Goto、Takashi Masuda 等 5 位作者1999-01-01Journal of the Japan Society of Colour Material
クルクミンの分子および結晶構造を室温でX線結晶構造解析によって研究した。結晶は単斜晶系, 空間群はZ=4でP2/nで, 結晶格子はα=12.688 (3) Å, b=7.2061 (5) Å, c=19.897 (5) Å, β=95.28° (1) であった。低温でなされたTΦnnesenらの求めた構造と炭素骨格において大きな違いはないが, 結晶構造においてO1-O4の距離が長く, この間での分子間水素結合は弱いと思われる。分子はエノール型の構造をとっているがTφnnesenらの求めた構造より水素の局在化がみられる。結晶クルクミンはその蛍光特性および極性物質 (特にアルカリ性物質) と相互作用し, 固体表面特性の評価が可能であっ…
Mesoporous Materials and CatalysisPorphyrin and Phthalocyanine ChemistrySynthesis of Organic Compounds
Yiting Xu、Yanan He、Fanfan Zeng 等 4 位作者1999-01-01IEEE Transactions on Dielectrics and Electrical Insulation
The effect of accelerated weather aging on ethylene-propylene-diene monomer (EPDM) rubber used for outdoor insulation was studied by surface roughness measurement and X-ray photoelectron spectroscopy (XPS). The surface roughness of EFDM rubber changed with aging time. The surface oxygen and aluminum content were found…
High voltage insulation and dielectric phenomenaInfrastructure Maintenance and MonitoringConcrete Corrosion and Durability
Steve D. Pollington、Adam F. Lee、Tina Overton 等 9 位作者1999-01-01Chemical Communications
The catalytic reduction of NO has been studied over novel supported uranium oxide catalysts which exhibit comparable activity and selectivity to that of conventional supported Pt catalysts and for which in situ XRD identifies the active phase to be UOx (2 < x < 2.25).
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
Pierluigi Colli、Gianni Gilardi、Philippe Laurençot 等 4 位作者1999-01-01Discrete and Continuous Dynamical Systems
This paper is concerned with a conserved phase-field model with memory. Weinclude memory by replacing the standard Fourier heat law with a constitutive assumptionof Gurtin-Pipkin type, and the system is conservative in the sense that the initial mass ofthe order parameter as well as the energy are preserved during the…
Solidification and crystal growth phenomenaStability and Controllability of Differential EquationsMetallurgy and Material Forming
Cesare Oliva、Lucio Forni、Paolo Pasqualin 等 5 位作者1999-01-01Physical Chemistry Chemical Physics
A series of catalysts has been analysed before and after their use for methane flameless oxidation with air. In most cases, a g2, linearly temperature-broadened, Lorentzian-shaped EPR line was observed at T>Tmin, where Tmin is the temperature corresponding to the narrowest EPR line, ranging between 244 and 392 K, depe…
Catalytic Processes in Materials ScienceMagnetic and transport properties of perovskites and related materialsCatalysis and Oxidation Reactions
K. Parliński1999-01-01AIP conference proceedings
We report on a direct method which allows, making use of the full crystal symmetry, to calculate the phonon dispersion curves from known Hellmann-Feynman forces found by any ab initio program. For non-ionic crystals the direct method reproduces exactly the dispersion curves, provided the range of interaction is confin…
Ultrasonics and Acoustic Wave PropagationThermal properties of materialsThermodynamic and Structural Properties of Metals and Alloys
Lifeng Li1999-01-01Journal of Optics A Pure and Applied Optics
In the Fourier modal method (FMM) and Chandezon method for modelling diffraction gratings, the reduction method is used to obtain approximate numerical solutions of certain matrix eigenvalue problems in the infinite Fourier space. However, at least in the optics literature to date, the legitimacy of using the reductio…
Photonic and Optical DevicesPhotonic Crystals and ApplicationsOptical Coatings and Gratings
James H. Miners、A.M. Bradshaw、Peter Gardner1999-01-01Physical Chemistry Chemical Physics
The NO+CO reaction on Pt{100} has been studied using in-situ vibrational spectroscopy (IRAS) under low reaction rate, non-oscillatory conditions. Using a total pressure of 7.5×10-7 mbar and a NO:CO ratio of 2:1, isocyanate (NCO) formation, characterised by an infrared absorption band at 2180 cm-1, is observed over a n…
Catalytic Processes in Materials ScienceGas Sensing Nanomaterials and SensorsCatalysis and Oxidation Reactions
Weon‐Kyung Choi、Katsuhiro Yamataka、Shu Guo Zhang 等 5 位作者1999-01-01Journal of The Electrochemical Society
A alloy electrode was immersed in a boiling 6 M KOH solution for a short period of time, and the effect on electrochemical and physicochemical properties of the alloy electrode was investigated. As a result, charge‐discharge characteristics of the alloy electrode were found to be greatly improved with increasing immer…
Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials
STEVE THOMPSON1999-01-01Woodhead Publishing Limited eBooks
How to use this book Writing your weld procedure Identification of material Choosing your filler wire Heat control Weld techniques Equipment Basic TIG welding for beginners Appendices: Other steels and tool steels Elements and their symbols Millimetres to inches conversion table Temperature conversion table weld proce…
Manufacturing Process and OptimizationMetallurgy and Material FormingMetal Alloys Wear and Properties
Wei Wu、Xinfan Huang、K. J. Chen 等 7 位作者1999-01-01Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
Nanometer silicon crystallites were fabricated by annealing a-Si:H/a-SiNx:H multiquantum well (MQW) structures with an excimer laser. The films were prepared by rf plasma enhanced chemical vapor deposition. Visible electroluminescence (EL) has been observed at room temperature from the crystallized samples that had Si…
Thin-Film Transistor TechnologiesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
H. E. Howard-Lock1999-01-01Metal-Based Drugs
We review the crystal structures, electrospray ionization mass spectra (ESI-MS) data and chiral HPLC data for the racemic and optically pure mononuclear AuL2 complexes, and for racemic [AuLI]n and optically pure [AgLII]n polymers (LI = thiomalate, LII = D-penicillamine). We postulate an equilibrium between polymeric,…
Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesNanocluster Synthesis and Applications
Robert B. Jones、Ramzi Kutteh1999-01-01Physical Chemistry Chemical Physics
We describe a practical approach for computing the mobility matrix of a system of colloidal particles near a hard wall. The approach can be carried out in principle to arbitrary accuracy and number of particles. We make use of this approach to perform Stokesian dynamics computer simulations of colloidal suspensions in…
Material Dynamics and PropertiesCoagulation and Flocculation StudiesRheology and Fluid Dynamics Studies
Benoît Appolaire、Virginie Albert、Hervé Combeau 等 4 位作者1999-01-01ISIJ International
The present study deals with experiments carried out to assess the influence of the movement of equiaxed crystals on their growth kinetics. The principle of the experiments is based on the settling of crystals growing in melts of transparent alloy undercooled at constant temperature. Ammonium chloride-water mixtures h…
Crystallization and Solubility Studies
Erika Szilágyi、Éva Tóth、Ernő Brücher 等 4 位作者1999-01-01Journal of the Chemical Society Dalton Transactions
UV-Vis and lanthanide-induced 17O shift measurements on the complex [Eu(DOTA)]– (H4DOTA = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) have shown that the inner co-ordination sphere of the Ln3+ ion is not affected on protonation which suggests that the proton is attached to a non-co-ordinated oxygen atom…
Radioactive element chemistry and processingLanthanide and Transition Metal ComplexesAdvanced NMR Techniques and Applications
G.G. Karady1999-01-01OpenAlex
This paper investigates the feasibility of using dynamic arc modeling of polluted insulators to characterize approaching flashover. The leakage current (LC) simulation results are compared to the measured leakage current, digitized during flashover test. It was observed that the harmonic content of the leakage current…
High voltage insulation and dielectric phenomenaPower Transformer Diagnostics and InsulationElevator Systems and Control
Andrzej Rajca、Kan Lu、Suchada Rajca 等 4 位作者1999-01-01Chemical Communications
Rapid quenching of the title bis(aminoxyl) 1 in 2-methyltetrahydrofuran from ambient temperature to cryogenic temperatures (5 K or below) produces 1 in its singlet state, which slowly converts at low temperatures, with an S-shaped time-dependence, to the triplet ground state.
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryElectron Spin Resonance Studies
Jae Sang Lee、Toshio Suzuki1999-01-01ISIJ International
The phase-field model is applied to simulate microstructural evolution during isothermal dendritic growth of the δ-phase in undercooled Fe-C liquid. The parameters of phase-field equation are determined by a thin interface limit condition. Realistic dendritic structures at various temperatures and compositions of the…
Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaMetallurgy and Material Forming
Kenneth A. Murray、Andrew B. Holmes、Stephen C. Moratti 等 4 位作者1999-01-01Journal of Materials Chemistry
Regioregular polythiophene copolymers 10a-d containing hexyl and 11-hydroxyundecyl side chains have been synthesised, by nickel-catalysed cross-coupling of well-defined Grignard intermediates. The hydroxy groups were protected during the polymerisation as tetrahydropyranyl ethers, and subsequently transformed into azi…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsSynthesis and properties of polymers