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Preparation and physical properties of trinuclear oxo-centered manganese complexes of general formulation [Mn3O(O2CR)6L3]0,+ (R = methyl or phenyl; L = a neutral donor group) and the crystal structures of [Mn3O(O2CMe)6(pyr)3](pyr) and [Mn3O(O2CPh)6(pyr)2(H2O)].cntdot.0.5MeCN

John B. Vincent、H.‐R. CHANG、Kirsten Folting 等 6 位作者1987-09-01OpenAlex

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and physical properties of trinuclear oxo-centered manganese complexes of general formulation [Mn3O(O2CR)6L3]0,+ (R = methyl or phenyl; L = a neutral donor group) and the crystal structures of [Mn3O(O2CMe)6(pyr)3](pyr) and [Mn3O(O2CPh)6(pyr)2(H2O)].cntdot.0.5MeCN…

Magnetism in coordination complexesOrganometallic Complex Synthesis and CatalysisMetal-Catalyzed Oxygenation Mechanisms

Spectroscopic analysis of phase separation behavior of model polyurethanes

Han Sup Lee、Ying Kang Wang、Shaw Ling Hsu1987-09-01OpenAlex

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic analysis of phase separation behavior of model polyurethanesHan Sup Lee, Ying Kang Wang, and Shaw Ling HsuCite this: Macromolecules 1987, 20, 9, 2089–2095Publication Date (Print):September 1, 1987Publication History Published online1 May 2002Published inissue 1…

Polymer composites and self-healing

Prediction of the glass transition temperature of polymers: A model based on the principle of corresponding states

A. T. Dibenedetto1987-09-01OpenAlex

Abstract The application of corresponding state principles to describe the properties of polymers is implicit in many of the fundamental studies of polymeric behavior. The seminal works of Prigogine, Hildebrand, Eyring, Flory, Gibbs, and DiMarzio in which multidimensional lattice representations and refined statistica…

Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesMaterial Dynamics and Properties

Introduction to microelectronic fabrication

R.C. Jaeger1987-09-01OpenAlex

(NOTE: Each chapter concludes with Summary, References, and Problems.) Preface. 1. An Overview of Microelectronic Fabrication. A Historical Perspective. An Overview of Monolithic Fabrication Processes and Structures. Metal-Oxide-Semiconductor (MOS) Processes. Basic Bipolar Processing. Safety. 2. Lithography. The Photo…

Copper Interconnects and ReliabilityAdvanced Surface Polishing TechniquesElectronic Packaging and Soldering Technologies

How Chemistry and Physics Meet in the Solid State

Roald Hoffmann1987-09-01OpenAlex

Abstract To make sense of the marvelous electronic properties of the solid state, chemists must learn the language of solid‐state physics, of band structures. An attempt is made here to demystify that language, drawing explicit parallels to well‐known concepts in theoretical chemistry To the joint search of physicists…

Catalysis and Oxidation ReactionsMachine Learning in Materials ScienceCrystallography and molecular interactions

A Stable Quasicrystal in Al-Cu-Fe System

A.‐P. Tsai、Akihisa Inoue、Tsuyoshi Masumoto1987-09-01OpenAlex

A thermodynamically stable quasicrystalline single phase with an icosahedral structure was found to be formed at an atomic composition of Al 65 Cu 20 Fe 15 in a fully annealed state as well as in a conventionally solidified state. The stable quasicrystal consisted of large grains with an average size of 0.2 mm after a…

Mineralogy and Gemology StudiesQuasicrystal Structures and PropertiesMicrostructure and mechanical properties

Photochemistry of colloidal semiconductors. 20. Surface modification and stability of strong luminescing CdS particles

Lubomír Spanhel、Markus Haase、Horst Weller 等 4 位作者1987-09-01OpenAlex

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemistry of colloidal semiconductors. 20. Surface modification and stability of strong luminescing CdS particlesLubomir Spanhel, Markus Haase, Horst Weller, and Arnim HengleinCite this: J. Am. Chem. Soc. 1987, 109, 19, 5649–5655Publication Date (Print):September 1, 198…

Nanocluster Synthesis and ApplicationsQuantum Dots Synthesis And Properties

A Continuum Model for Void Nucleation by Inclusion Debonding

A. Needleman1987-09-01OpenAlex

A cohesive zone model, taking full account of finite geometry changes, is used to provide a unified framework for describing the process of void nucleation from initial debonding through complete decohesion. A boundary value problem simulating a periodic array of rigid spherical inclusions in an isotropically hardenin…

Metal Forming Simulation TechniquesNumerical methods in engineeringMaterial Properties and Failure Mechanisms

Low-temperature properties and localized electronic states of glasses

M.I. Klinger1987-08-31Soviet Physics Uspekhi

The basic ideas and a number of results of the theory of low-energy excitations and localized electronic states, which are responsible for the universal low-temperature anomalies in glasses and unusual electronic properties of nonmetallic glasses, primarily glassy semiconductors, are reviewed. The basic hypotheses and…

Advanced Materials and Semiconductor TechnologiesAdvanced Energy Technologies and Civil Engineering InnovationsElectrical and Electromagnetic Research

Beneficial effect of Co substitution on the magnetic properties of rapidly quenched Nd-Fe-B

J. Wecker、L. Schultz1987-08-31Applied Physics Letters

Isotropic Nd15(Fe1−xCox)77B8 ribbons are produced by conventional melt spinning. For moderate Co additions the coercivity HcI increases while the remanence Jr remains almost constant. Co contents above x=0.3 lead to decreasing HcI and Jr values. The beneficial effect of Co on coercivity is ascribed to the occurrence o…

Magnetic Properties of AlloysRare-earth and actinide compoundsMetallic Glasses and Amorphous Alloys

Submicrosecond electro-optic switching in the liquid-crystal smectic A phase: The soft-mode ferroelectric effect

Gunnar B. J. Andersson、Ingolf Dahl、Patrick Keller 等 7 位作者1987-08-31Applied Physics Letters

A new liquid-crystal electro-optic modulating device similar to the surface-stabilized ferroelectric liquid-crystal device is described. It uses the same kind of ferroelectric chiral smectics and the same geometry as that device (thin sample in the ‘‘bookshelf ’’ layer arrangement) but instead of using a tilted smecti…

Phase-change materials and chalcogenidesLiquid Crystal Research AdvancementsMolecular spectroscopy and chirality

Two-dimensional quasicrystal with eightfold rotational symmetry

Ning Wang、Hongsong Chen、K. H. Kuo1987-08-31Physical Review Letters

A 2D quasicrystal with an eightfold rotational axis has been found in rapidly solidified V-Ni-Si and Cr-Ni-Si alloys by means of transmission electron microscopy. The electron diffraction pattern taken along this axis shows no periodicity but a clear eightfold orientation symmetry. The corresponding high-resolution el…

Quasicrystal Structures and PropertiesMineralogy and Gemology Studies

Rate Laws and Rate Constants in Crystal Growth

Arne E. Nielsen1987-08-25University of Zagreb University Computing Centre (SRCE)

The mechanisms controlling the growth rate of electrolyte crystals precipitating from aqueous solution may be classified in eight types.Most of these are associated with a specific kinetics -linear, parabolic or exponential, -and composites of these kinetics are also found.A linear kinetics is found when the crystal g…

Crystallization and Solubility Studies

Microcrystals of tryptophan synthase .alpha.2.beta.2 complex from Salmonella typhimurium are catalytically active

Syed Ashrafuddin Ahmed、C. Craig Hyde、Gunter Thomas 等 4 位作者1987-08-25Biochemistry

An improved and efficient method has been developed for the purification of the tryptophan synthase alpha 2 beta 2 complex (EC 4.2.1.20) from Salmonella typhimurium containing a multicopy plasmid. Microcrystals prepared in 12% poly(ethylene glycol) 8000 containing 2.5 mM spermine are shown by scanning electron microsc…

Microbial Metabolic Engineering and BioproductionEnzyme Structure and FunctionProtein Structure and Dynamics

Infrared reflectivity and electronic states in perovskite-type oxides La1-xSrxFeO3and La1-xSrxCoO3

S. Tajima、A Masaki、S. Uchida 等 6 位作者1987-08-20Journal of Physics C Solid State Physics

Optical phonon spectra are investigated by infrared reflectivity measurements for La 1-x Sr x FeO 3 (x=0, 0.1, 0.25 and 0.4) and La 1-x Sr x CoO 3 (x=0, 0.02 and 0.1). Using the phonon parameters determined by Kramers-Kronig and oscillator analysis, the effective charges and the electron-phonon coupling constants are…

Thermal Expansion and Ionic ConductivityMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides

Computer simulation studies of anisotropic systems

David J. Adams、G. R. Luckhurst、R. W. Phippen1987-08-20Molecular Physics

We have simulated the behaviour of a collection of particles interacting via the anisotropic Gay-Berne potential, using the molecular dynamics technique. The system is found to exhibit both an isotropic liquid and a nematic liquid crystal; the approximate temperature at which the transition between these phases occurs…

Advanced Thermodynamics and Statistical MechanicsLiquid Crystal Research AdvancementsMaterial Dynamics and Properties

Thermal behavior, morphology, and the determination of the Flory–Huggins interaction parameter of polycarbonate–polystyrene blends

Woo Nyon Kim、Charles M. Burns1987-08-20Journal of Applied Polymer Science

Abstract Blends of bisphenol‐A polycarbonate (PC) and polystyrene (PS) prepared by screw extrusion and solution casting have been investigated with weight fractions of PC in the blends varying from 0.95 to 0.05. From the measured glass transition temperatures ( T g ) and specific heat increments (Δ C p ) at the T g ,…

Polymer crystallization and propertiesEpoxy Resin Curing ProcessesPolymer Nanocomposites and Properties

Immobilization of microorganisms by adhesion: Interplay of electrostatic and nonelectrostatic interactions

Nava Mozes、Frédéric Marchal、M. P. Hermesse 等 7 位作者1987-08-20Biotechnology and Bioengineering

The adhesion of three microorganisms (Saccharomyces cerevisiae, Acetobacter aceti, and Moniliella pollinis) to different materials has been studied using various supports (glass, metals, plastics), some of which were treated by an Fe(III) solution. The surface properties of the cells were characterized by the zeta pot…

Biocrusts and Microbial EcologyForce Microscopy Techniques and ApplicationsPolymer Surface Interaction Studies

Novel oxidation process in Ge+-implanted Si and its effect on oxidation kinetics

O. W. Holland、C. W. White、D. Fathy1987-08-17Applied Physics Letters

Thermal oxidation of Si is shown to be substantially affected by the implantation of Ge+ ions. A unique morphology develops during steam oxidation due to the rejection of Ge from the oxide at the growth interface. The Ge pile-up leads to the formation of a distinct layer of almost pure Ge between the oxide and the und…

Silicon and Solar Cell TechnologiesSilicon Nanostructures and PhotoluminescenceSemiconductor materials and devices

Collagen type IX: Evidence for covalent linkages to type II collagen in cartilage

David R. Eyre、Stephen Apon、Jiann-Jiu Wu 等 5 位作者1987-08-17FEBS Letters

A major site of pyridinoline cross-linking in bovine type IX collagen was traced to a tryptic peptide derived from one of the molecule's HMW chains. This peptide gave two amino acid sequences (in 2/1 ratio) consistent with it being a three-chained structure. The major sequence matched exactly that of the C-telopeptide…

Collagen: Extraction and CharacterizationOsteoarthritis Treatment and MechanismsCell Adhesion Molecules Research