Joachim Pickardt、P. Wischlinski1999-06-01Zeitschrift für Naturforschung B
Crystals o f the complex [K (benzo-18-crown-6][Zn(CN) 3 ] H 2 O were obtained from a solution o f Zn(CN) 2 , KCN, and benzo-18-crown-6 in water/methanol. The compound crystallizes in the triclinic space group PI (no. 2),: Z = 2, a = 818,6(5), b = 1236,7(8), c = 1359,6(6) pm, a = 67,02(4), β = 87,38(4), 7 = 75,46(5). E…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesInorganic Chemistry and Materials
Hanno Priebe、A. Aukrust、Hans‐René Bjørsvik 等 5 位作者1999-06-01Journal of Clinical Pharmacy and Therapeutics
BACKGROUND: During the production process of the X-ray contrast agent iodixanol the drug substance may be exposed to acid, base, air, heat and daylight, conditions that may cause decomposition products. OBJECTIVE: To investigate the chemical stability of iodixanol under accelerating conditions. METHOD: Chemometrical s…
Lanthanide and Transition Metal ComplexesOxidative Organic Chemistry ReactionsChemical Reactions and Mechanisms
R. S. Lillard、Darryl P. Butt、Neil Baker 等 5 位作者1999-06-01Surface Engineering
Plasma source ion implantation (PSII) is a non-line of sight process for implanting complex shaped targets without the need for complex fixturing. The breakdown initiation of materials coated with diamondlike carbon (DLC) produced by PSII occurs at defects in the DLC, which expose the underlying material, thus establi…
Metal and Thin Film MechanicsDiamond and Carbon-based Materials ResearchIon-surface interactions and analysis
Jianxia Gao、Lirong Zheng、Zhitang Song 等 7 位作者1999-06-01Philosophical Magazine B
PbZr0.52Ti0.48O3 (PZT)/YBa2Cu3O7−δ (YBCO) structures were fabricated on LaAlO3 and Y2O3-stabilized ZrO2 (YSZ) substrates by a pulsed-excimer-laser deposition method. The total dose effects on the Au/PZT/YBCO ferroelectric capacitors were considered by measuring the capacitance-voltage (C-V) characteristics and the ret…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesElectronic and Structural Properties of Oxides
Difei F. Wang、Benjamin D. Shaw、Albert Yang1999-06-01AIChE Journal
Abstract Experimental results on gasification behaviors of freely‐falling spent alkylation sulfuric acid droplets in high‐temperature environments are presented, as well as baseline data on evaporation of water droplets and sulfuric acid droplets. Low evaporation constants have been measured for sulfuric acid droplets…
Thermochemical Biomass Conversion ProcessesCombustion and Detonation ProcessesThermal and Kinetic Analysis
Hyun-Jin Koo、Moon W. Suh1999-06-01Textile Research Journal
As a new method for maximizing yarn and fabric strengths, an exploratory blending experiment is completed in a 4-week period by processing 2117 bales of three different cottons in a textile mill to produce 94.4 tex (6.3/1 Ne) open-end spun yarns, and weaving them into a denim fabric. Bale selection is done in such a w…
Mechanical Behavior of CompositesTextile materials and evaluationsStructural Analysis and Optimization
M. C. Foster、D. J. Arbogast、Panos Photinos 等 5 位作者1999-06-01Journal of Applied Crystallography
The atomic coordinates of K 2 (NbO) 2 Si 4 O 12 reported in space group P 4 bm satisfy the structural criteria for ferroelectricity. The estimated phase-transition temperature, T c = 2230 (250) K, is substantially in excess of T melting = 1476 (5) K; the hypothetical paraelectric phase in space group P 4/ mbm is hence…
Crystal Structures and PropertiesSolid-state spectroscopy and crystallographyInorganic Fluorides and Related Compounds
R. Rajya Lakshmi、S. K. Athithan1999-06-01Polymer Composites
Abstract The Polar Satellite Launch Vehicle (PSLV) makes use of hydroxy terminated polybutadiene (HTPB) based solid propellant in the booster stages, strap‐ons, and the third stage. An empirical model that describes the change in viscosity of various formulations of propellant slurry with time and temperature has been…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesEpoxy Resin Curing Processes
Hisashi Shimakage、Akira Kawakami、Z. Wang1999-06-01IEEE Transactions on Applied Superconductivity
Epitaxial growth of YBCO thin films with a MgO buffer layer on Si[100] substrate is reported. The MgO thin film was deposited by RF magnetron sputtering, using a single crystal MgO target. The crystallization of the MgO thin films was found to be dependent on the substrate temperature and the sputtering gas mixture. T…
Physics of Superconductivity and MagnetismZnO doping and propertiesSemiconductor materials and devices
Prashant Patel、B. T. Thaker、S. Zele1999-06-01INDIAN JOURNAL OF CHEMISTRY- SECTION A
The complexes of the composition [Ln(PMVP)3.Hp.C2H50H].H20 (where Ln = trivalent lanthanides such as La, Ce, Nd, Sm, Gd, Dy, Er and PMVP = l-phenyl-3-methyl-4-valeroyl-2-pyrazoline-5-one) have been synthesised. These have been characterised on the basis of elemental analyses, conductance, magnetic measurement, electro…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMolecular spectroscopy and chirality
Steven J. Severtson、Prasad Y. Duggirala、Phillip W. Carter 等 4 位作者1999-06-01OpenAlex
Buildup of scale in the kraft digester and black-liquor evaporators is a major contributor to lost pulp mill productivity. Scale deposition occurs in areas such as the heaters and extraction screens of continuous digesters and the liquor side of heat-transfer surfaces in the evaporators. This reduces the efficiency an…
Calcium Carbonate Crystallization and InhibitionMinerals Flotation and Separation Techniques
Brigitta Frank、Albert Renken1999-06-01Chemical Engineering & Technology
The reduction of NO by CO on Pt has been extensively investigated in the past since it helps to eliminate NO of the exhaust gas of cars. However, the dissociation of NO in this reaction and the deactivation of the NO/CO reaction on Pt-supported catalysts still need to be discussed. In this work, the reduction of NO wi…
Catalytic Processes in Materials ScienceCatalysis and Hydrodesulfurization StudiesIndustrial Gas Emission Control
Ö. Işık Ece、Fazlı Çoban、Nurfer Güngör 等 4 位作者1999-06-01Clays and Clay Minerals
Abstract The clay mineralogy of an oxisol-saprolite overlying serpentinite and underlying basalt was studied with different techniques to evaluate the clay mineral transformation that occurred and to understand the origin of Fe 3+ -rich smectite. The saprolite zone of the oxisol, up to 30 m thick, contains smectites o…
Clay minerals and soil interactionsIron oxide chemistry and applicationsMineralogy and Gemology Studies
F. Martin、Sabine Petit、Olivier Grauby 等 4 位作者1999-06-01Clay Minerals
Abstract The deuteration technique was used to assign unknown infrared (IR) bands of Ge-bearing talcs. Procedures to achieve partial or complete H/D replacement in synthetic Ge-bearing (Mg, Ni and Co)-talcs have been investigated. From the spectral shift of IR absorption bands in the 4000–300 cm -1 region resulting fr…
Ferroelectric and Piezoelectric MaterialsAdvanced ceramic materials synthesisGlass properties and applications
Vishwas Acharya、A. Bhanumathi、Koduri Ramam1999-06-01Ferroelectrics Letters Section
This paper reports the Ferroelectric and Piezoelectric properties of lanthanum doped lead barium niobate ceramics with formula Pbx-3y/2 Ba1-x Lay Nb2 O6. Piezoelectric properties showed a strong enhancement at morphotrophic phase boundary between tetragonal and orthorhombic phases. d33 value of 350 pc/N obtained is hi…
Ferroelectric and Piezoelectric MaterialsPhotorefractive and Nonlinear OpticsAcoustic Wave Resonator Technologies
I. A. Ryzhkin1999-06-01Journal of Experimental and Theoretical Physics
A model of the ice proton system taking into account quantum-mechanical tunneling of protons along hydrogen bonds has been formulated and investigated. When the tunneling amplitude is small the quantum ground state of the proton system is degenerate, like the classical ground state. At higher tunneling amplitudes, how…
Solid-state spectroscopy and crystallographyQuantum, superfluid, helium dynamicsMolecular Spectroscopy and Structure
Jae Ho Yang、Woong Kil Choo、Jin Ho Lee 等 4 位作者1999-06-01Acta Crystallographica Section B Structural Science
The room-temperature crystal structure of the B-site ordered complex perovskite strontium ytterbium niobate, Sr(Yb(0.5)Nb(0.5))O(3) [monoclinic, Z = 2, P2(1)/n (set 2), a = 5.79095 (8), b = 5.82210 (7), c = 8.20358 (12) Å, beta = 90.126 (1) degrees, with final R(wp) = 0.0595, R(Bragg) = 0.0203 for the neutron profile…
Ferroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materialsMicrowave Dielectric Ceramics Synthesis
М. В. Цебренко、Н. М. Резанова、A. P. Nikolaeva 等 5 位作者1999-06-01Polymer Engineering and Science
Abstract The influence of sodium oleate additives on processing and morphology of polypropylene ‐ co ‐polyamide (PP/CPA) mixture melts has been investigated. It is shown that sodium oleate is located in the interphase of the components and acts at small additives (up to 3 wt%) as an interfacial tension agent, improvin…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites
Ali Assad、Maurice Chiron、J.C. Nimal 等 5 位作者1999-06-01Nuclear Science and Engineering
This study proposes a new approximating formula for calculating gamma-ray buildup factors in multilayer shields. The formula combines the buildup factors of single-layer shields with products and quotients. The feasibility of the formula for reproducing the buildup factors was tested by using point isotropic buildup f…
Nuclear Physics and ApplicationsRadiation Shielding Materials AnalysisGraphite, nuclear technology, radiation studies
A. N. Semenov1999-06-01Europhysics Letters (EPL)
The structure of a topological dipole (two nematic point defects with opposite charges) is considered theoretically both in an infinite space and in a capillary. It is shown that the Frank elastic energy tends to concentrate within a spheroidal string if the defects are not too far from each other. The string thicknes…
Liquid Crystal Research AdvancementsForce Microscopy Techniques and ApplicationsAdvanced Materials and Mechanics