Chin‐Ping Yang、Yaping Chen、Eamor M. Woo2004-05-19Journal of Polymer Science Part A Polymer Chemistry
Abstract A CF 3 ‐containing diamine, 1,4‐bis(4‐amino‐2‐trifluromethylphenoxy) benzene ( I ), was prepared from hydroquinone and 2‐chloro‐5‐nitrobenzotrifluoride. Imide‐containing diacids ( V a–h and VI a,b ) were prepared through the condensation reaction of amino acids, aromatic diamines, and trimellitic anhydride. T…
Epoxy Resin Curing ProcessesSynthesis and properties of polymersSilicone and Siloxane Chemistry
Jing Tao、Jian‐Min Zuo2004-05-19Physical Review B
We show that strain has a large effect on charge ordering (CO) formation in ${\mathrm{La}}_{0.33}{\mathrm{Ca}}_{0.67}{\mathrm{MnO}}_{3}$ by in situ high-resolution electron microscopy. CO forms inside the orthorhombic domains of the distorted perovskite structure and results further strain. Inside a single domain upon…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
D. D. Borole、U. R. Kapadi、Pramod P. Mahulikar 等 4 位作者2004-05-19Polymers for Advanced Technologies
Abstract A simple technique is described for constructing a glucose sensor by the entrapment of glucose oxidase (GOD) in a polyaniline (PA), poly( o ‐toluidine) (POT) and their copolymer poly(aniline‐co‐ o ‐toluidine) (PA‐co‐POT) thin films, which were electrochemically deposited on a platinum plate in phosphate and a…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
Michael E. DeRosa、Mingqian He、Jeffrey S. Cites 等 5 位作者2004-05-19The Journal of Physical Chemistry B
We present the photostability results of seven novel electro-optic chromophores made to be used in high-speed fiber optic signal modulators. We measured the photobleaching rate of the chromophores at room temperature by using a fiber optic pump−probe technique. Thin polymer film guest−host samples were deposited on th…
Photonic and Optical DevicesAdvanced Fiber Laser TechnologiesNonlinear Optical Materials Research
J. Bradley Holmes、Jerry Tsai2004-05-19Protein Science
We have investigated some of the basic principles that influence generation of protein structures using a fragment-based, random insertion method. We tested buildup methods and fragment library quality for accuracy in constructing a set of known structures. The parameters most influential in the construction procedure…
Protein Structure and DynamicsGlycosylation and Glycoproteins ResearchEnzyme Structure and Function
Malte Henkel、Matthias Paeßens、Michel Pleimling2004-05-19Physical Review E
The time-dependent scaling of the thermoremanent and zero-field-cooled susceptibilities in ferromagnetic spin systems undergoing aging after a quench to a temperature at or below criticality is studied. A recent debate on their interpretation is resolved by showing that for systems with a short-ranged equilibrium spin…
Material Dynamics and PropertiesTheoretical and Computational PhysicsNonlinear Dynamics and Pattern Formation
Ju‐Yeon Lee、Ju‐Yeon Lee、Han‐Bae Bang 等 8 位作者2004-05-19Journal of Polymer Science Part A Polymer Chemistry
Abstract 2,5‐Bis‐(3,4‐dicarboxyphenylcarboxyethoxy)‐4′‐nitrostilbene dianhydride was prepared and reacted with 1,4‐phenylenediamine, 4,4′‐oxydianiline, 4,4′‐diaminobenzanilide, and 4,4′‐(hexafluoroisopropylidene)dianiline to yield unprecedented novel T‐type polyimides ( 4 – 7 ) containing 2,5‐dioxynitrostilbenyl group…
Nonlinear Optical Materials ResearchPhotorefractive and Nonlinear OpticsSynthesis and properties of polymers
Richard M. Laine、S. G. Kim、Jason Rush 等 8 位作者2004-05-19Macromolecules
We report here studies directed toward the synthesis and characterization of cross-linked poly(ethylene oxide) gels for use as drug delivery platforms. These gels were prepared by anionic ring-opening polymerization of diepoxy PEO 400, PEO 3400, and PEO 8000 using t -BuOK as the initiator. The diepoxy PEO 3400 and PEO…
Advanced Sensor and Energy Harvesting Materialsbiodegradable polymer synthesis and propertiesSilicone and Siloxane Chemistry
John A. Duffy2004-05-19The Journal of Physical Chemistry B
The optical basicity treatment of oxidic network systems, for example silicates, has been successful in correlating a range of properties; since the method has the advantage of avoiding such problems as those associated with “single ion” activities, it allows comparisons between many different systems. However, severa…
Geological and Geochemical AnalysisHigh-pressure geophysics and materialsGlass properties and applications
Niangui Wang、Lina Zhang、Yongshang Lu2004-05-19Industrial & Engineering Chemistry Research
Two kinds of aqueous dispersions were prepared from waterborne polyurethane (WPU) and its prepolymer by mixing (M) and grafting (G) with 10 wt % casein, respectively. The resulting dispersions were characterized by using a rotary viscometer and a particle size distribution meter, indicating that the viscosity, Z avera…
biodegradable polymer synthesis and propertiesMicroplastics and Plastic PollutionPolymer composites and self-healing
Adel Rahmani、Patrick C. Chaumet、Garnett W. Bryant2004-05-19The Astrophysical Journal
We investigate the influence of local-field effects on the electromagnetic response of a collection of dipoles. We derive the local-field corrected static polarizability for a collection of dipoles in the case of a scatterer with uniform depolarization. We then use this correction within the discrete dipole approximat…
Metamaterials and Metasurfaces ApplicationsPlasmonic and Surface Plasmon ResearchAdvanced Antenna and Metasurface Technologies
John B. Gruber、U. Vetter、H. Hofsäß 等 5 位作者2004-05-19Physical Review B
We report crystal-field splitting investigations of ${\mathrm{Gd}}^{3+}{(4f}^{7})$ energy levels determined from high resolution energy (Stark) level cathodoluminescence (CL) spectroscopy of Gd-implanted 2H-aluminum nitride (AlN) in the wavelength range 250 to 320 nm and at temperatures 12, 77, and 300 K. The CL spect…
Luminescence Properties of Advanced MaterialsSemiconductor materials and devicesAcoustic Wave Resonator Technologies
Matthias Ballauff、Christos N. Likos2004-05-19Angewandte Chemie
Abstract Eine Vielzahl von theoretischen Untersuchungen und Experimenten zeigt, dass gelöste Dendrimere sich wie flexible Polymere in guten Lösungsmitteln verhalten und daher am besten als Makromoleküle mit einem dichten Kern und fluktuierenden Monomerbausteinen beschrieben werden. Wir zeigen hier mithilfe von analyti…
Advanced Polymer Synthesis and CharacterizationPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers
Sinue Gómez、Óscar Giraldo、Luis J. Garces 等 5 位作者2004-05-19Chemistry of Materials
The present work describes a new way to synthesize manganese species within the channels of mesoporous MCM-48 silica using permanganate as manganese precursor agent. For the first time permanganate ions were incorporated within the as-synthesized mesoporous host by ion-exchange process. The resulting materials were ch…
Supercapacitor Materials and FabricationZeolite Catalysis and SynthesisMesoporous Materials and Catalysis
U‐Ser Jeng、Ya‐Sen Sun、Hsin‐Yi Lee 等 7 位作者2004-05-19Macromolecules
CdS nanoparticles with surfaces modified by mercaptoethanol have been synthesized for greater solubility in dimethylformamide (DMF) and the ability to preferentially bind to the poly(ethylene oxide) (PEO) blocks of polystyrene- block -poly(ethylene oxide) (PS- b -PEO) copolymer. The size of the surface-modified CdS na…
Organic Electronics and PhotovoltaicsQuantum Dots Synthesis And PropertiesBlock Copolymer Self-Assembly
A. Srinivasan、Tomoya Ishizuka、Hiromitsu Maeda 等 4 位作者2004-05-19Angewandte Chemie International Edition
Adding to the confusion: [3+2] coupling of confused tripyrrane and confused dipyrromethane dicarbinol, followed by oxidation, results in the synthesis of meso-pentafluorophenyl-substituted, doubly N-confused, oxo-substituted pentaphyrins (see X-ray crystal structure; green: F, blue: N, red: O). The oxopyrrole moieties…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Sanghak Kim、Jason Gislason、R. W. Morton 等 6 位作者2004-05-19Chemistry of Materials
We report here the synthesis of (TiO 2 ) x (Al 2 O 3 ) 1 - x nanopowders with molar ratios that span the TiO 2 −Al 2 O 3 composition range. The nanopowders were synthesized using liquid-feed flame spray pyrolysis (LF−FSP) of mixtures of N(CH 2 CH 2 O) 3 TiOiPr (titanatrane isopropoxide) and N(CH 2 CH 2 O) 3 Al (alumat…
Catalytic Processes in Materials ScienceFlame retardant materials and propertiesThermal and Kinetic Analysis
Inna Levin、G. Meiri、Moshe Peretz 等 5 位作者2004-05-19Protein Science
Pseudomonas aeruginosa alcohol dehydrogenase (PaADH; ADH, EC 1.1.1.1) catalyzes the reversible oxidation of primary and secondary alcohols to the corresponding aldehydes and ketones, using NAD as coenzyme. We crystallized the ternary complex of PaADH with its coenzyme and a substrate molecule and determined its struct…
Protein Structure and DynamicsEnzyme Structure and FunctionAmino Acid Enzymes and Metabolism
Chiara Carbonera、Andrea Dei、Jean‐François Létard 等 5 位作者2004-05-19Angewandte Chemie
Stimmig: Ein Material, das eine Valenztautomerisierung eingeht, wurde durch das Abstimmen der elektronischen Eigenschaften eines zweikernigen Cobalt-Polyoxolen-Komplexes (schematisch gezeigt) erhalten, der ein dreiwertiges Metallion als Hilfspartner enthält. Die thermisch oder durch Licht induzierbare Tautomerisierung…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Mehmet Çopuroğlu、Murat Şen2004-05-19Polymers for Advanced Technologies
Abstract In this comparative study, the effect of carbon black (CB) on the thermal ageing characteristics of poly(ethylene‐co‐vinyl acetate) (EVA) was investigated. EVA, containing 13% vinyl acetate (VA), and poly(ethylene‐co‐vinyl acetate)/carbon black mixture (EVA/CB) containing 13% VA and 1% CB were aged at 85°C in…
Polymer Nanocomposites and PropertiesThermal and Kinetic AnalysisPolymer Science and PVC