Jaume Veciana、Concepció Rovira、M. Crespo 等 6 位作者1991-03-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStable polyradicals with high-spin ground states. 1. Synthesis, separation, and magnetic characterization of the stereoisomers of 2,4,5,6-tetrachloro-.alpha.,.alpha.,.alpha.',.alpha.'-tetrakis(pentachlorophenyl)-m-xylylene biradicalJaume Veciana, Concepcio Rovira, Maria I. C…
Magnetism in coordination complexesSynthesis and Properties of Aromatic CompoundsAdvanced NMR Techniques and Applications
Judi Bryant、Michael T. Blanda、Marco Vincenti 等 4 位作者1991-03-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHost-guest complexation. 55. Guest capture during shell closureJudi A. Bryant, Michael T. Blanda, Marco Vincenti, and Donald J. CramCite this: J. Am. Chem. Soc. 1991, 113, 6, 2167–2172Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Publish…
Radioactive element chemistry and processingCalcium Carbonate Crystallization and InhibitionCrystallization and Solubility Studies
Anne George、Arthur Veis1991-03-01Biochemistry
The assembly of type I collagen molecules into native fibrils can be accomplished in vitro in solutions at physiological ionic strength and pH by raising the temperature above 30 degrees C. The thermal self-assembly reaction exhibits a distinct lag phase. This lag phase has been proposed to be evidence for a conformat…
Meat and Animal Product QualityMarine Biology and Environmental ChemistryCollagen: Extraction and Characterization
Brad Lee Holian、Arthur F. Voter、Norman J. Wagner 等 9 位作者1991-03-01Physical Review A
We propose a model embedded-atom (many-body) potential and test it against an effective, density-independent, pairwise-additive potential in a variety of nonequilibrium molecular-dynamics simulations of plastic deformation under high stress. Even though both kinds of interactions have nearly the same equilibrium equat…
Microstructure and mechanical propertiesHigh-pressure geophysics and materialsIon-surface interactions and analysis
M. Slaughter、R. J. Hill1991-03-01Journal of Sedimentary Research
Abstract We hypothesize that the decomposition of organic debris derived from plants, planktonic animals, and algae by sulfate-reducing bacteria, and specifically by the enzymatic degradation of protein, is vital to organogenic dolomitization. The role of this degradation is to increase both alkalinity and pH of the p…
Paleontology and Stratigraphy of FossilsCalcium Carbonate Crystallization and InhibitionMinerals Flotation and Separation Techniques
M. J. Forrestal、N. S. Brar、V.K. Luk1991-03-01Journal of Applied Mechanics
We developed engineering models that predict forces and penetration depth for long, rigid rods with spherical noses and rate-independent, strain-hardening targets. The spherical cavity expansion approximation simplified the target analysis, so we obtained closed-form penetration equations that showed the geometric and…
High-pressure geophysics and materialsEnergetic Materials and CombustionHigh-Velocity Impact and Material Behavior
J.J. Schoenau、W.Z. Huang1991-03-01Communications in Soil Science and Plant Analysis
Three techniques were evaluated as soil P tests for western Canadian soils: anion‐exchange membrane (AEM), water, and bicarbonate extraction. The AEM, water, and bicarbonate‐extractable total P represented novel approaches to compare to the widely used bicarbonate‐extractable inorganic P (traditional Olsen) soil test.…
Soil Carbon and Nitrogen DynamicsSoil and Water Nutrient DynamicsClay minerals and soil interactions
Samo Kralj、S. Žumer、D. W. Allender1991-03-01Physical Review A
Possible phases in a nematic liquid crystal confined to a spherical submicrometer droplet embedded in a solid polymer are analyzed in terms of a Landau--de Gennes theory. For a droplet with a radial structure we show that the strength of the nematic-polymer interfacial interaction affects the nematic-paranematic (part…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesSurfactants and Colloidal Systems
Douglas D. Dischino、Edward J. Delaney、John Emswiler 等 7 位作者1991-03-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of nonionic gadolinium chelates useful as contrast agents for magnetic resonance imaging: 1,4,7-tris(carboxymethyl)-10-substituted-1,4,7,10-tetraazacyclododecanes and their corresponding gadolinium chelatesD. D. Dischino, E. J. Delaney, J. E. Emswiler, G. T. Gaugha…
Medical Imaging Techniques and ApplicationsLanthanide and Transition Metal ComplexesRadiopharmaceutical Chemistry and Applications
Masa‐aki Sato、Hisayuki Morii1991-03-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNuclear magnetic resonance studies on electrochemically prepared poly(3-dodecylthiophene)Masaaki Sato and Hisayuki MoriiCite this: Macromolecules 1991, 24, 5, 1196–1200Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 Mar…
Conducting polymers and applicationsForce Microscopy Techniques and ApplicationsElectrochemical Analysis and Applications
Atsushi Takahara、Arthur J. Coury、Robert W. Hergenrother 等 4 位作者1991-03-01Journal of Biomedical Materials Research
A series of segmented polyurethanes (SPUs) containing various polyol soft segments was prepared and their resistance to oxidative degradation was investigated after aging in AgNO3 solution. The SPU with the polyether soft segment showed a large reduction in mechanical strength after exposure to the oxidative environme…
biodegradable polymer synthesis and propertiesPolymer composites and self-healingMarine Biology and Environmental Chemistry
M. Igarashi、M. Khantha、V. Vítek1991-03-01Philosophical Magazine B
Finnis-Sinclair (F-S) type many-body potentials have been constructed for eight hexagonal metals: Co, Zr, Ti, Ru, Hf, Zn, Mg and Be. The potentials are parameterized using cubic splines and fitted to the cohesive energy, unrelaxed vacancy formation energy, five independent second-order elastic constants and two eauili…
High-pressure geophysics and materialsRare-earth and actinide compoundsBoron and Carbon Nanomaterials Research
Donald L. Koch、Eric S. G. Shaqfeh1991-03-01Journal of Fluid Mechanics
Caflisch & Luke (1985) showed that, owing to the long range of the hydrodynamie interactions, the variance of the sedimentation velocity in a random suspension with uniform probability for the positions of the particles is divergent in the sense that it grows without bound as the macroscopic linear dimension of th…
Material Dynamics and PropertiesHeat and Mass Transfer in Porous MediaElectrostatics and Colloid Interactions
R. A. M. Hikmet1991-03-01Liquid Crystals
Two component mixtures containing liquid crystalline diacrylates and liquid crystal molecules with no reactive groups have been made. Upon photopolymeriz-ation of the mixtures anisotropic networks containing liquid crystal molecules which were not chemically attached to the networks were created. In these systems the…
Liquid Crystal Research AdvancementsAdvanced Polymer Synthesis and CharacterizationPhotopolymerization techniques and applications
Mark W. Ellsworth、Bruce M. Novak1991-03-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMutually interpenetrating inorganic-organic networks. New routes into nonshrinking sol-gel composite materialsMark W. Ellsworth and Bruce M. NovakCite this: J. Am. Chem. Soc. 1991, 113, 7, 2756–2758Publication Date (Print):March 1, 1991Publication History Published online1 M…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisPolyoxometalates: Synthesis and Applications
César A. Barbero、M.C. Miras、Otto Haas 等 4 位作者1991-03-01Journal of The Electrochemical Society
Probe beam deflection (PBD) was used to monitor the ion exchange between polymer film and bulk electrolyte during the redox reaction in polyaniline in aqueous electrolyte ( , , ). The PBD results clearly show that protons as well as anions are exchanged during the first oxidation process. Protons are exchanged at pote…
Fuel Cells and Related MaterialsConducting polymers and applicationsAnalytical Chemistry and Sensors
Donald A. Tomalia、David M. Hedstrand、Michael S. Ferritto1991-03-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComb-burst dendrimer topology: new macromolecular architecture derived from dendritic graftingDonald A. Tomalia, David M. Hedstrand, and Michael S. FerrittoCite this: Macromolecules 1991, 24, 6, 1435–1438Publication Date (Print):March 1, 1991Publication History Published onl…
Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesDendrimers and Hyperbranched Polymers
Alexander Steinbüchel、H. G. Schlegel1991-03-01Molecular Microbiology
The Alcaligenes eutrophus genes for beta-ketothiolase, NADPH-dependent acetoacetyl-CoA reductase and poly(beta-hydroxybutyric acid) synthase (PHB synthase) which comprise the three-step PHB-biosynthetic pathway, were cloned. Molecular studies revealed that these genes are organized in a single operon. The A. eutrophus…
biodegradable polymer synthesis and propertiesMicrobial Metabolic Engineering and BioproductionEnzyme Production and Characterization
Francisca Puertas、Ángel Palomo、M.ª Teresa Blanco1991-03-01Materiales de Construccion
This paper constitutes a compilation as well as an interpretation of the present state of knowledge about the different microstructures developed in the interface areas of concrete, that is, the cement paste-aggregates, the cement paste-reinforcement, the cement paste-fiber, etc. The Chemical reactions taking place in…
José Antonio Coto1991-03-01Materiales de Construccion
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