Zhi Fang、T. S. Andy Hor、K.F. Mok 等 6 位作者1993-04-01Organometallics
[Mn3(CO)9(μ3-S)2] - has been isolated from the reaction between [Mn(CO)5]- and 5-substituted 1,3,4-oxathiazol-2-one (RCNSCO(O); R = phenyl, methyl, 3,5-dinitrophenyl) in THF. X-ray analysis revealed a D3h equilateral triangular cluster with three Mn(CO)3 units (Mn-Mn = 2.7680(16)-2.7918(13) Å) apically bicapped by two…
Organometallic Complex Synthesis and CatalysisMetal complexes synthesis and propertiesMagnetism in coordination complexes
Tapan Ganguly、Luc J. Farmer、W. Li 等 6 位作者1993-04-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysics of a 2,7-dimethoxy-N-methylcarbazole-based polysiloxaneT. Ganguly, L. Farmer, W. Li, J. Y. Bergeron, D. Gravel, and G. DurocherCite this: Macromolecules 1993, 26, 9, 2315–2322Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Pub…
Organic Light-Emitting Diodes ResearchConducting polymers and applicationsPhotochemistry and Electron Transfer Studies
Michael A. Schwartz、Brian F. Link、Anthony F. Sammells1993-04-01Journal of The Electrochemical Society
A series of new brownmillerite solid electrolytes of composition have been synthesized and incorporated into small laboratory fuel cells. Ionic conductivities for both the phases were measured and conductivities up to at 600°C were observed. An activation energy for ionic conduction of 0.35 eV was measured for the pha…
Advancements in Solid Oxide Fuel CellsZeolite Catalysis and SynthesisSolid-state spectroscopy and crystallography
Pawel Keblinski、Wen-Jong Ma、Amos Maritan 等 5 位作者1993-04-01Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
The results of molecular-dynamics simulations of the phase separation of binary fluids in narrow channels are presented. Two channel widths allowing for one or two fluids layers are considered. The one-layer case does not exhibit good scaling. The two-layer case does and the growth exponents are the same as that found…
Block Copolymer Self-AssemblyFluid Dynamics and Thin Filmsnanoparticles nucleation surface interactions
Z. Yahia、S. Turrell、J.P. Mercurio 等 4 位作者1993-04-01Journal of Raman Spectroscopy
Abstract Raman microprobe and diffuse‐reflectance Fourier transform IR spectra of a series of seven metal hexaborides show that the basic cubic symmetry of these systems is lowered owing to lattice vacancies. The resulting wave vector is oriented along the C 4 axis of the first Brillouin zone. Studies of enriched boro…
Metal and Thin Film MechanicsAluminum Alloys Composites PropertiesBoron and Carbon Nanomaterials Research
A. Jabłoński1993-04-01Surface and Interface Analysis
Abstract The accuracy of quantitative XPS analyses using relative sensitivity factors is increased if matrix effects are accounted for in calculations of surface composition. This requires knowledge of the energy dependence of the inelastic mean free path (IMFP) for a given sample. It is sufficient for routine analyse…
Advancements in Photolithography TechniquesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
F. Gingl、Parasuraman Selvam、K. Yvon1993-04-01Acta Crystallographica Section B Structural Science
density. Such a temperature effect would only be noticeable for elements with closely spaced partially occupied energy levels, like the 3d metals, but not for first-to third-row elements. This is consistent with the observation that the water densities are virtually identical at the two temperatures. If the above inte…
Magnesium Alloys: Properties and ApplicationsMagnetic Properties of AlloysMetallurgical and Alloy Processes
Wolfgang Meyer1993-04-01Advanced Materials
Developments in polymeric materials in 1992 were characterized by small but important steps achieved as the result of much detailed work. Increasing attention is being paid to the supramolecular structure of the materials with the aim of producing ever smaller well‐defined systems. Examples cited in the review include…
Conducting polymers and applicationsPolymer composites and self-healing
Paul Diehl、Bruce A. McFadden1993-04-01Journal of Bacteriology
By a newly developed double-stranded mutagenesis technique, histidine (H), glutamate (E), arginine (R) and leucine (L) have been substituted for the lysyl 193 residue (K-193) in isocitrate lyase from Escherichia coli. The substitutions for this residue, which is present in a highly conserved, cationic region, signific…
Bacterial Genetics and BiotechnologyAdvanced biosensing and bioanalysis techniquesEnzyme Structure and Function
Kenji Ema、Takashi Uematsu、Atsushi Sugata Atsushi Sugata 等 4 位作者1993-04-01Japanese Journal of Applied Physics
A complex calorimeter has been developed. This calorimeter, which can be operated both in the ac mode and the relaxation mode using the same sample cell and the same apparatus settings, uses only a small amount (30-50 mg) of sample. An application to measurements in the vicinity of the antiferroelectric phase transiti…
Liquid Crystal Research AdvancementsAnalytical Chemistry and ChromatographyMolecular spectroscopy and chirality
H.‐U. HUMMEL、Edmund Fischer、Tobias Fischer 等 5 位作者1993-04-01Zeitschrift für anorganische und allgemeine Chemie
Abstract Gd 2 (SO 4 ) 3 · 8 H 2 O kristallisiert monoklin in der Raumgruppe C2/c mit den Gitterkonstanten a = 13,531(7), b = 6,739(2), c = 18,294(7) Å und β = 102,20(8)°. In der Struktur ist Gd von je 4 Sauerstoffatomen des Hydratwassers und der Sulfationen in Form eines stark verzerrten quadratischen Antiprismas umge…
Glass properties and applicationsCrystal Structures and PropertiesX-ray Diffraction in Crystallography
Nico M. Keulen1993-04-01Journal of the American Ceramic Society
Time‐dependent deformation behavior was investigated for soda–lime silicate glass with various water contents, using a nanoindentation technique. The complete indentation curve, loading and unloading part, is analyzed. It is shown that this deformation behavior may be represented in terms of a simple mechanical model…
Advanced ceramic materials synthesisMetal and Thin Film MechanicsAdvanced Surface Polishing Techniques
Xiaoguang He、Manijeh Razeghi1993-04-01Journal of Applied Physics
Two GaAs/GaInP superlattices grown on GaAs substrates by low-pressure metalorganic chemical vapor deposition have been studied using high resolution x-ray diffraction measurements and simulations by solving Tagaki–Taupin equations. The strained layers at both interfaces of the GaAs well are identified from the simulat…
Semiconductor Quantum Structures and DevicesSemiconductor materials and devicesOptical Coatings and Gratings
Y. Liu、Günter Reiter、K. Kunz 等 4 位作者1993-04-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the interdiffusion between poly(methyl methacrylate) films by marker movementY. Liu, G. Reiter, K. Kunz, and M. StammCite this: Macromolecules 1993, 26, 8, 2134–2136Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published…
Polymer crystallization and propertiesMaterial Dynamics and PropertiesRheology and Fluid Dynamics Studies
Hajime Tanaka1993-04-01Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
Here we demonstrate the evolution of an unusual phase-separated pattern caused by a double quench: a first quench from a one-phase to a two-phase region and a subsequent second quench within the two-phase region. The resulting pattern evolution strongly depends upon the type of a double-quench sequence. A deeper secon…
Material Dynamics and PropertiesTheoretical and Computational PhysicsBlock Copolymer Self-Assembly
Jacques Pécaut、R. Masse1993-04-01Acta Crystallographica Section B Structural Science
The orthorhombic crystal structure of 2C 5 H 6 N 3 O 2 + .- Cr 2 O 7 2- (a=22.454 (6), b=15.129 (2), c=5.189 (2) A, Z=4, orthorhombic, P2 1 nb, D x =1.866 g cm -3 ] has been solved using direct methods and refined to wR=0.029 for 2514 reflections. This study provides a step towards a new route to obtain non-linear opt…
Crystal structures of chemical compoundsNonlinear Optical Materials ResearchPhotochromic and Fluorescence Chemistry
Priyanka Tyagi、B. D. Gupta、Harpal Singh1993-04-01Journal of Macromolecular Science Part A
Antimicrobial sutures were prepared by the radiation grafting of 2-hydroxyethyl methacrylate (HEMA) monomer on polypropylene monofilament. It was found that the inherent characteristics of monofilaments are considerably influenced by the grafting of poly(HEMA). The grafting decreases the crystalline/amorphous ratio in…
Hydrogels: synthesis, properties, applicationsElectrospun Nanofibers in Biomedical ApplicationsSurgical Sutures and Adhesives
J. Felts1993-04-01Journal of Plastic Film & Sheeting
SiO x thin films continue to be developed for polymeric flexible substrates. During the past year significant progress has been made on plasma deposition onto PET, LDPE, BOPP and BON polymer films. In addition, the first two 1.5 meter wide plasma roll coaters were completed and installed. The current state of the roll…
Surface Modification and SuperhydrophobicityMetal and Thin Film MechanicsDiamond and Carbon-based Materials Research
Thomas Sauer1993-04-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHexagonal-columnar mesophases in substituted phthalocyaninatopolysiloxanesThomas SauerCite this: Macromolecules 1993, 26, 8, 2057–2063Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://pubs.acs.org/doi/10…
Porphyrin and Phthalocyanine Chemistry
Poopathy Kathirgamanathan1993-04-01Advanced Materials
Cables are shielded from electromagnetic interference by wrapping them in conductive tapes such as aluminum polyester laminates, μ‐metals, or metal‐coated non‐wovens. Inherently conducting polymer (ICP) based tapes would be a lightweight option, but these are difficult to produce continuously in large quantities. This…
Advanced Battery Technologies ResearchElectromagnetic wave absorption materialsRecycling and Waste Management Techniques