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Origin of the electrocatalytic properties for oxygen reduction of some heat-treated polyacrylonitrile and phthalocyanine cobalt compounds adsorbed on carbon black as probed by electrochemistry and x-ray absorption spectroscopy

Maria do Carmo Martins Alves、J. P. Dodelet、Daniel Guay 等 5 位作者1992-12-01The Journal of Physical Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrigin of the electrocatalytic properties for oxygen reduction of some heat-treated polyacrylonitrile and phthalocyanine cobalt compounds adsorbed on carbon black as probed by electrochemistry and x-ray absorption spectroscopyM. C. Martins Alves, J. P. Dodelet, D. Guay, M. L…

Fuel Cells and Related MaterialsConducting polymers and applicationsElectrochemical Analysis and Applications

Dopants in Vapor‐Phase Synthesis of Titania Powders

M. Kamal Akhtar、Sotiris E. Pratsinis、S. V. R. Mastrangelo1992-12-01Journal of the American Ceramic Society

Gas‐phase synthesis of titania by TiCl 4 oxidation in the presence of dopants (SiCl 4 , POCl 3 , and BCl 3 ) was investigated in an aerosol reactor as a function of temperature (1300–1700 K) and dopant concentration (0–25 mol% of TiCl 4 ). The addition of dopants, most notably silicon and phosphorus, drastically alter…

Advanced ceramic materials synthesisRecycling and utilization of industrial and municipal waste in materials productionNuclear materials and radiation effects

A numerical investigation of non-spherical rebounding bubbles

John P. Best、Adam Kučera1992-12-01Journal of Fluid Mechanics

The motion of buoyant transient cavities with non-condensible contents is investigated numerically using a boundary-integral method. The bubble contents are described by an adiabatic gas law. Motion is considered in the neighbourhood of a rigid boundary, in an axisymmetric geometry. We investigate whether the non-cond…

Fluid Dynamics and MixingUltrasound and Cavitation PhenomenaOil Spill Detection and Mitigation

Stress Singularities at the Interface in Bonded Dissimilar Materials Under Mechanical and Thermal Loading

D. Münz、Yajun Yang1992-12-01Journal of Applied Mechanics

Stress singularities occur at the free edge of the interface of bonded dissimilar materials. General relations for a compound with 90-degree angles of the two materials are given for the parameters which describe the stress field. Differences between mechanical and thermal loadings are discussed.

Mechanical Behavior of CompositesHigh-Velocity Impact and Material BehaviorMaterial Properties and Applications

Biodegradation of polyhydroxyalkanoates

Joris Mergaert、C. S. Anderson、A. Wouters 等 5 位作者1992-12-01FEMS Microbiology Letters

Degradation of poly(3-hydroxybutyrate) and copolymers with 3-hydroxyvaleric acid was investigated in natural environments, and the microorganisms involved were isolated and identified. The influence of abiotic and biotic factors on the degradation is discussed.

biodegradable polymer synthesis and propertiesElectrospun Nanofibers in Biomedical ApplicationsMicroplastics and Plastic Pollution

Solitons in a box: the organic chemistry of electrically conducting polyenes

Laren M. Tolbert1992-12-01Accounts of Chemical Research

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolitons in a box: the organic chemistry of electrically conducting polyenesLaren M. TolbertCite this: Acc. Chem. Res. 1992, 25, 12, 561–568Publication Date (Print):December 1, 1992Publication History Published online1 May 2002Published inissue 1 December 1992https://pubs.ac…

Electrochemical sensors and biosensorsConducting polymers and applicationsElectrochemical Analysis and Applications

Consolidation Behavior of Flocculated Alumina Suspensions

Lennart Bergström、Christopher H. Schilling、İlhan A. Aksay1992-12-01Journal of the American Ceramic Society

The consolidation behavior of flocculated alumina suspensions has been analyzed as a function of the interparticle energy. Consolidation was performed by a centrifugal force field or by gravity, and both the time‐dependent and equilibrium density profiles were measured by a gamma‐ray absorption technique. The interpar…

Material Dynamics and PropertiesGranular flow and fluidized bedsClay minerals and soil interactions

Structure and properties of tris[bis(ethylenedithio)tetrathiafulvalenium]tetrachlorocopper(II) hydrate, (BEDT-TTF)3CuCl4.H2O: first evidence for coexistence of localized and conduction electrons in a metallic charge-transfer salt

Peter Day、Mohamedally Kurmoo、Talal Mallah 等 9 位作者1992-12-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and properties of tris[bis(ethylenedithio)tetrathiafulvalenium]tetrachlorocopper(II) hydrate, (BEDT-TTF)3CuCl4.H2O: first evidence for coexistence of localized and conduction electrons in a metallic charge-transfer saltP. Day, M. Kurmoo, T. Mallah, I. R. Marsden, R…

Magnetism in coordination complexesOrganic and Molecular Conductors ResearchSolid-state spectroscopy and crystallography

In vitro and in vivo studies on bioabsorbable ultra‐high‐strength poly(L‐lactide) rods

Yoshitaka Matsusue、Takao Yamamuro、Masanori Oka 等 6 位作者1992-12-01Journal of Biomedical Materials Research

Ultra-high-strength poly(L-lactide) (PLLA) rods were fabricated using a drawing technique. Rods with a diameter of 3.2 mm and a draw ratio of 2.5:1 showed initial bending strength and modulus values of 240 MPa and 13 GPa, respectively. The purpose of this study was to investigate the in vitro and in vivo degradation o…

Bone Tissue Engineering MaterialsOrthopaedic implants and arthroplastybiodegradable polymer synthesis and properties

The influence of grain boundary inclination on the structure and energy of σ = 3 grain boundaries in copper

U. Wolf、F. Ernst、T. Muschik 等 5 位作者1992-12-01Philosophical magazine. A/Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties

In a combined theoretical and experimental study, the energies and structures of σ = 3, [011] tilt boundaries in Cu were investigated. Equilibrium atomistic structures and grain-boundary energies were calculated by static energy minimization using an embedded-atom potential. Cu bicrystals of the same boundary orientat…

Microstructure and mechanical propertiesMetal and Thin Film MechanicsMicrostructure and Mechanical Properties of Steels

Accuracy and precision in protein structure analysis: restrained least-squares refinement of the structure of poplar plastocyanin at 1.33 Å resolution

J.M. Guss、H.D. Bartunik、H. C. Freeman1992-12-01Acta Crystallographica Section B Structural Science

The structure of the electron-transfer protein, plastocyanin (99 amino acids, one Cu atom, 10,500 Da) from poplar leaves, has been refined at 1.33 A resolution to a residual R = 0.15. The space group is orthorhombic, P2(1)2(1)2(1), a = 29.60 (1), b = 46.86 (3), c = 57.60 (3) A. The 14,303 reflections used in the refin…

Genomics and Phylogenetic StudiesPhotosynthetic Processes and MechanismsEnzyme Structure and Function

Morphology development in polymer blends

Uttandaraman Sundararaj、Christopher W. Macosko、Richard J. Rolando 等 4 位作者1992-12-01Polymer Engineering and Science

Abstract The major morphological changes during polymer blending occur during the initial softening stage. This work explains the evolution of phase morphology of polymer blends from pellets to submicron particles in a co‐rotating twin‐screw extruder. The extruder was opened and blend samples were taken along its leng…

Polymer crystallization and propertiesRheology and Fluid Dynamics StudiesPolymer Foaming and Composites

Synthesis and ion selectivity of all conformational isomers of tetrakis[(ethoxycarbonyl)methoxy]calix[4]arene

Koji Iwamoto、Seiji Shinkai1992-12-01The Journal of Organic Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and ion selectivity of all conformational isomers of tetrakis[(ethoxycarbonyl)methoxy]calix[4]areneKoji Iwamoto and Seiji ShinkaiCite this: J. Org. Chem. 1992, 57, 26, 7066–7073Publication Date (Print):December 1, 1992Publication History Published online1 May 2002P…

Molecular Sensors and Ion DetectionSupramolecular Chemistry and ComplexesLanthanide and Transition Metal Complexes

Molecular basis for biosynthesis and accumulation of polyhydroxyalkanoic acids in bacteria

Alexander Steinbà ⁄ chel、Eilert Hustede、Matthias Liebergesell 等 6 位作者1992-12-01FEMS Microbiology Letters

The current knowledge on the structure and on the organization of polyhydroxyalkanoic acid (PHA)-biosynthetic genes from a wide range of different bacteria, which rely on different pathways for biosynthesis of this storage polyesters, is provided. Molecular data will be shown for genes of Alcaligenes eutrophus, purple…

biodegradable polymer synthesis and propertiesChromium effects and bioremediationBiopolymer Synthesis and Applications

Calculation and electronic description of quadratic hyperpolarizabilities. Toward a molecular understanding of NLO responses in organotransition metal chromophores

David R. Kanis、Mark A. Ratner、Tobin J. Marks1992-12-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalculation and electronic description of quadratic hyperpolarizabilities. Toward a molecular understanding of NLO responses in organotransition metal chromophoresDavid R. Kanis, Mark A. Ratner, and Tobin J. MarksCite this: J. Am. Chem. Soc. 1992, 114, 26, 10338–10357Publica…

Nonlinear Optical Materials ResearchOrganic and Molecular Conductors ResearchSynthesis and Characterization of Heterocyclic Compounds

Synthesis and comparative reactivity and electronic structural features of [MFe3S4]z+ cubane-type clusters (M = iron, cobalt, nickel)

Jian Zhou、Michael J. Scott、Zhengguo Hu 等 6 位作者1992-12-01Journal of the American Chemical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and comparative reactivity and electronic structural features of [MFe3S4]z+ cubane-type clusters (M = iron, cobalt, nickel)Jian Zhou, Michael J. Scott, Zhengguo Hu, Gang Peng, E. Munck, and R. H. HolmCite this: J. Am. Chem. Soc. 1992, 114, 27, 10843–10854Publicatio…

Iron-based superconductors researchInorganic Chemistry and MaterialsInorganic Fluorides and Related Compounds

Regulation by proteolysis: energy-dependent proteases and their targets

Susan Gottesman、Michael R. Maurizi1992-12-01Microbiological Reviews

A number of critical regulatory proteins in both prokaryotic and eukaryotic cells are subject to rapid, energy-dependent proteolysis. Rapid degradation combined with control over biosynthesis provides a mechanism by which the availability of a protein can be limited both temporally and spatially. Highly unstable regul…

Ubiquitin and proteasome pathwaysEndoplasmic Reticulum Stress and DiseaseEnzyme Structure and Function