Tanja Weil、Erik Reuther、Kläus Müllen2002-06-03Angewandte Chemie International Edition
Dendritic multichromophores based on a rigid polyphenylene scaffold contain up to three different types of rylene chromophores incorporated at the focal point, the scaffold, and the periphery of the dendrimer. An energy gradient between the periphery and the core is thus generated and allows an efficient transfer of e…
Dendrimers and Hyperbranched PolymersSynthesis and Properties of Aromatic CompoundsLuminescence and Fluorescent Materials
P. Chandra、M. Dawber、P. B. Littlewood 等 4 位作者2002-06-03arXiv
For forty years researchers on ferroelectric switching have used the Kay-Dunn theory to model the thickness-dependence of the coercive field; it works surprisingly well, despite the fact that it is based upon homogeneous nucleation and a small-field expansion, neither of which is realized in thin films. Here we demons…
Materials Science
A. Troupis、Anastasia Hiskia、E. Papaconstantinou2002-06-03PubMed
Fine metal nanoparticles of Ag, Au, Pd, and Pt were obtained at room temperature, by simple mixing of the corresponding metal ions with reduced polyoxometalates (POMs) that serve both as photocatalysts and stabilizers, according to the cycle shown.
Polyoxometalates: Synthesis and ApplicationsPigment Synthesis and PropertiesNanomaterials for catalytic reactions
Nicolas Keller、Nadezhda I. Maksimova、Vladimir Roddatis 等 8 位作者2002-06-03Angewandte Chemie International Edition
The microstructure is appealing: Onion-like carbon forms are used for the first time in the field of catalysis and thus open new routes for the potential applications of nonplanar carbon materials. An example is given with the oxidative dehydrogenation of ethylbenzene to styrene (see scheme).
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisCatalysis and Oxidation Reactions
A. Troupis、Anastasia Hiskia、E. Papaconstantinou2002-06-03Angewandte Chemie International Edition
Fine metal nanoparticles of Ag, Au, Pd, and Pt were obtained at room temperature, by simple mixing of the corresponding metal ions with reduced polyoxometalates (POMs) that serve both as photocatalysts and stabilizers, according to the cycle shown.
Polyoxometalates: Synthesis and Applications
Adam C. Durst、R. N. Bhatt、P. A. Wolff2002-06-03arXiv
The magnetic behavior of insulating doped diluted magnetic semiconductors (DMS's) is characterized by the interaction of large collective spins known as bound magnetic polarons. Experimental measurements of the susceptibility of these materials have suggested that the polaron-polaron interaction is ferromagnetic, in c…
Advanced Condensed Matter PhysicsMagnetic and transport properties of perovskites and related materialsZnO doping and properties
Robert Aveyard、Bernard P. Binks、John H. Clint 等 13 位作者2002-06-03OpenAlex
Using a laser tweezers method, we have determined the long-range repulsive force as a function of separation between two charged, spherical polystyrene particles (2.7 microm diameter) present at a nonpolar oil-water interface. At large separations (6 to 12 microm between particle centers) the force is found to decay w…
Pickering emulsions and particle stabilizationElectrostatics and Colloid InteractionsSurfactants and Colloidal Systems
Lina Zhang、Dong Ruan、Shanjun Gao2002-06-03OpenAlex
Abstract A novel cellulose solvent, 1.5 M NaOH/0.65 M thiourea aqueous solution, was used to dissolve cotton linters having a molecular weight of 10.1 × 10 4 to prepare cellulose solution. Regenerated cellulose (RC) films were obtained from the cellulose solution by coagulating with sulfuric acid (H 2 SO 4 ) aqueous s…
Lignin and Wood ChemistryAdvanced Cellulose Research Studiesbiodegradable polymer synthesis and properties
Won Il Park、D. H. Kim、Soonwook Jung 等 4 位作者2002-06-03OpenAlex
We report metalorganic vapor-phase epitaxial growth and structural and photoluminescent characteristics of ZnO nanorods. The nanorods were grown on Al2O3(00⋅1) substrates at 400 °C without employing any metal catalysts usually needed in other methods. Electron microscopy revealed that nanorods with uniform distributio…
ZnO doping and propertiesCopper-based nanomaterials and applicationsGa2O3 and related materials
Andreas Hirsch2002-06-03OpenAlex
Through chemical functionalization of single-walled carbon nanotubes, the prerequisites for possible applications of such nanostructures are established. The derivatized tubes differ from the crude materials in their good solubility, which enables both a more extensive characterization and subsequent chemical reactivi…
Fullerene Chemistry and ApplicationsGraphene research and applicationsCarbon Nanotubes in Composites
Damir Viličić、Ivona Marasović、Daniela Mioković2002-06-02University of Zagreb University Computing Centre (SRCE)
According to recent insights, the phytoplankton of the eastern Adriatic Sea is composed of 888 determined species. The diatoms were composed of 518 species (330 pennates, 176 centric diatoms), dinoflagellates 254, prymnesiophyceae101, chrysophyceae 2, raphidophyceae 1 and euglenophyceae 2 species. The list is accompan…
Marine Biology and Ecology ResearchMarine and coastal ecosystemsDiatoms and Algae Research
C. Riverol、Henrik K. Hansen、William E. Acree2002-06-01The Canadian Journal of Chemical Engineering
Abstract The solubility of diuron (3‐(3,4‐dichlorophenyl)‐1, 1 ‐dimethyl urea) and monuron (3‐(4‐chlorophenyl)‐1, 1 ‐dimethyl urea) in 49 and 43 different organic non‐electrolyte solvents, respectively, have been calculated. It was found that Modified UNIFAC described well the solubilities both in polar solvents like…
Thermodynamic properties of mixturesPhase Equilibria and ThermodynamicsCrystallization and Solubility Studies
Silvia Alessandra Truffi、Celso Augusto Clemente2002-06-01Scientia Agricola
A região de Piraju -- SP é caracterizada geologicamente por apresentar uma grande distribuição de rochas básicas e ácidas da Formação Serra Geral. Os processos e produtos de alteração das rochas básicas são apresentados em muitos trabalhos, mas estudos envolvendo alteração de rochas vulcânicas ácidas são raros. Aprese…
Clay minerals and soil interactionsIron oxide chemistry and applicationsGeography and Environmental Studies
Gene A. Niles、Sandra E. Morgan、William C. Edwards2002-06-01The Bovine Practitioner
A central nervous system disease occurred in a group of beef steers placed into confinement feeding pens during a period of prolonged drought and high environmental temperatures in Oklahoma, USA (September 2000). The steers began exhibiting neurological signs during the 3rd week after placement into the pens. Microsco…
Metallurgy and Material ScienceHeterotopic Ossification and Related Conditions
Talaat M. Hammad2002-06-01Annalen der Physik
Abstract A complete infrared study of the mixed crystal system of NaNO 3 and NaNO 2 is carried out in the region 600—3000 cm —1 at room temperature. The study includes fundamental internal normal vibrations of the NO — 2 and NO — 3 ions. The IR spectra, spectral band shape intensities, combination modes, and frequenci…
Nonlinear Optical Materials ResearchSolid-state spectroscopy and crystallographyLuminescence Properties of Advanced Materials
Fernando dos Santos Ortega、M. D. M. Innocentini、Fernando A. Valenzuela 等 4 位作者2002-06-01Cerâmica
A produção de espumas cerâmicas através da aeração de suspensões associada ao processo "gelcasting" pode proporcionar cerâmicas porosas celulares com excelentes propriedades mecânicas, em uma ampla faixa de densidades. Entretanto, o uso deste material em aplicações específicas, como filtragem, isolamento térmico e sup…
Fluid Dynamics and Heat TransferPolymer Foaming and CompositesPickering emulsions and particle stabilization
Masahiro Mikuriya、Hiroshi Azuma、Jianmin Sun 等 5 位作者2002-06-01Chemistry Letters
Abstract Copper(II) complexes of 4-carboxyl-2,2,6,6,-tetramethyl-piperidinyloxy (Hcatempo) and 3-carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxy (Hcaproxy), [Cu2(catempo)4(H2O)2] (1) and [Cu2(caproxy)4(H2O)2] (2), have been synthesized and characterized by X-ray crystallography, electronic spectroscopy and magnetic susc…
Metal-Catalyzed Oxygenation MechanismsMetal complexes synthesis and propertiesMagnetism in coordination complexes
Douglas R. MacFarlane、Peter J. Newman、Alice T. Voelkel2002-06-01Journal of the American Ceramic Society
High‐purity zirconium tetrafluoride (ZrF 4 ) has been produced using sublimation and distillation techniques. The transition‐metal impurities have been determined in these purified samples, and it has been found that distillation is the preferred method of purification using a number of criteria. A detailed descriptio…
Material Science and ThermodynamicsGlass properties and applicationsSilicone and Siloxane Chemistry
Masako Niwa2002-06-01International Journal of Clothing Science and Technology
This paper outlines the history of clothing and modern textile production, from manual systems to modern line‐production systems, and notes that this has been affected by the mechanical properties of fabrics. It also focuses on the roles of textile scientists and the clothing industry to meet the needs of society.
Fashion and Cultural TextilesTextile materials and evaluationsDyeing and Modifying Textile Fibers
Muncheul Lee、Myung Sun Lee、Tomiji Wakida 等 6 位作者2002-06-01Textile Research Journal
Desized and scoured nylon 6 fabric is treated with liquid ammonia (NH 3 ) at -33.4°C. and the effects of the treatment on crystallinity, density, birefringence, DSC thermogram, moisture regain, water absorption, dyeability, and mechanical properties are investigated. The NH 3 treatment increases crystallinity and dens…
Material Properties and ProcessingTextile materials and evaluationsDyeing and Modifying Textile Fibers