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第 153420 / 164638 页 · 当前展示 3,068,381–3,068,400 / 3,292,748 条匹配结果 · 摘要仅作预览

Highly dichroic benzo-2,1,3-thiadiazoledyes containing five linearly π-conjugated aromatic residues, with fluorescent emission ranging from green to red, in a liquid crystal guest–host system

Xuelong Zhang、Rumiko Yamaguchi、K. Moriyama 等 8 位作者2005-12-02Journal of Materials Chemistry

A number of fluorescent benzothiadiazole dyes have been synthesised and their optical properties, when dispersed in a liquid crystal host phase, examined. These dyes have five linearly π-conjugated aromatic ring systems (both with and without ethene and 1,3-butadiene spacers). The liquid crystalline host medium, used…

Liquid Crystal Research AdvancementsPhotochromic and Fluorescence ChemistryPhotopolymerization techniques and applications

First Hyperpolarizabilities of 1,3,5‐Tricyanobenzene Derivatives: Origin of Larger β Values for the Octupoles than for the Dipoles

Sang Hae Lee、Jo Ryoung Park、Mi‐Yun Jeong 等 9 位作者2005-12-02ChemPhysChem

A series of donor-acceptor substituted stilbene and diphenylacetylene derivatives and their octupolar analogues have been synthesized and the linear and nonlinear optical properties (beta) studied by both experiments and theoretical calculation. The lambda(max) of the dipoles increases with the conjugation length and…

Nonlinear Optical Materials ResearchSynthesis and Properties of Aromatic CompoundsBioactive Compounds and Antitumor Agents

Structure and thermal expansion of multi-walled carbon nanotubes before and after high temperature treatment

Fangshun Wu、Hui–Ming Cheng2005-12-02Journal of Physics D Applied Physics

The structure and thermal expansion of multi-walled carbon nanotubes (MWNTs) with different diameters, prepared through the catalytic decomposition of vaporized benzene, were studied by x-ray diffraction at different temperatures, combined with scanning electron microscopy, transmission electron microscopy and electro…

Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications

Reactive-templated grain growth processing for lead free piezoelectric ceramics

Toshihiko Tani、Takeshi Kimura2005-12-02Advances in Applied Ceramics Structural Functional and Bioceramics

Texture engineering using reactive-templated grain growth (RTGG) is reviewed as a key processing technique for lead free piezoelectric ceramics. Bismuth layer structured ferroelectric ABi4Ti4O15 (A=Na0·5Bi0·5, Ca, Sr) ceramics with a highly preferred {001} orientation were fabricated with enhanced piezoelectric proper…

Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesMicrowave Dielectric Ceramics Synthesis

Optical Magnetoelectric Effect in Multiferroic Materials: Evidence for a Lorentz Force Acting on a Ray of Light

Kei Sawada、Naoto Nagaosa2005-12-02Physical Review Letters

We theoretically propose that the optical analog of a Lorentz force acting on a ray of light is realized in multiferroic materials such as ${\mathrm{GaFeO}}_{3}$ showing the magnetoelectric effect. The toroidal moment $\stackrel{\ensuremath{\rightarrow}}{T}=\ensuremath{\sum}_{j}{\stackrel{\ensuremath{\rightarrow}}{r}}…

Photonic Crystals and ApplicationsMultiferroics and related materialsMagneto-Optical Properties and Applications

Sorption of ethyl acetate and d‐limonene in poly(lactide) polymers

Rafael Auras、Bruce Harte、Susan E. M. Selke2005-12-02Journal of the Science of Food and Agriculture

Abstract Poly(lactide) (PLA) polymers have garnered increased attention in the last few years as food packaging materials because they are environmentally friendly polymers. As the production of PLA increases and price per pound drops, PLA is becoming a growing alternative as a green food packaging material. In this r…

biodegradable polymer synthesis and propertiesMicroplastics and Plastic PollutionCarbon dioxide utilization in catalysis

Biodegradable Nanoparticles for Direct or Two-Step Tumor Immunotargeting

Leila Nobs、Franz Buchegger、Robert Gurny 等 4 位作者2005-12-02Bioconjugate Chemistry

In this study, selective cancer cell targeting of biodegradable poly(lactic acid) (PLA) nanoparticles (NPs) has been investigated in vitro. SKOV-3 (HER2 positive) ovarian cancer and Daudi (CD20 positive) lymphoma cell targeting was mediated by anti-HER2 (trastuzumab, Herceptin) and anti-CD20 (rituximab, Mabthera) mono…

Nanoparticle-Based Drug DeliveryRNA Interference and Gene DeliveryMonoclonal and Polyclonal Antibodies Research

Magnetic properties of Sr_2Fe_1+xMo_1-xO_6 with -1 <= x <= 0.25

Dinesh Topwal、D. D. Sarma、H. Kato 等 5 位作者2005-12-02arXiv

We have synthesized the solid solution, Sr_2Fe_1+xMo_1-xO_6 with -1 <= x <= 0.25, the composition x = 0 corresponding to the well-known double perovskite system Sr2FeMoO6. We report structural and magnetic properties of the above system, exhibiting systematic variations across the series. These results restrict the ra…

Materials ScienceStrongly Correlated Electrons

Direct Phenol Synthesis by Selective Oxidation of Benzene with Molecular Oxygen on an Interstitial‐N/Re Cluster/Zeolite Catalyst

Rajaram Bal、Mizuki Tada、Takehiko Sasaki 等 4 位作者2005-12-02Angewandte Chemie International Edition

Remarkable selectivity (88 % in the steady-state reaction and 94 % in the pulse reaction) is observed in the direct synthesis of phenol from benzene with molecular oxygen over a Re/zeolite catalyst prepared by chemical-vapor deposition. The novel interstitial-N/Re clusters are formed with NH3 and are essential for the…

Catalytic Processes in Materials ScienceMesoporous Materials and CatalysisCatalysis and Oxidation Reactions

Ab initiostructural energetics ofβ−Si3N4surfaces

Juan Carlos Idrobo、Hakim Iddir、Serdar Öğüt 等 6 位作者2005-12-02Physical Review B

Motivated by recent electron microscopy studies on the ${\mathrm{Si}}_{3}{\mathrm{N}}_{4}∕\text{rare}\text{\ensuremath{-}}\text{earth}$ oxide interfaces, the atomic and electronic structures of bare $\ensuremath{\beta}\text{\ensuremath{-}}{\mathrm{Si}}_{3}{\mathrm{N}}_{4}$ surfaces are investigated from first principl…

Advanced ceramic materials synthesisMetal and Thin Film MechanicsSemiconductor materials and devices

The safety of gadolinium in patients with stage 3 and 4 renal failure

İhsan Ergün、Kenan Keven、Irfan Uruç 等 7 位作者2005-12-02Nephrology Dialysis Transplantation

BACKGROUND: Although there is a well-documented risk of acute renal failure (ARF) with the iodinated contrast agents, intravenous gadolinium-based contrast agents are considered non-nephrotoxic and have been widely used for magnetic resonance imaging (MRI). However, debate continues regarding the safety issue of gadol…

Acute Kidney Injury ResearchLanthanide and Transition Metal ComplexesMRI in cancer diagnosis

Exchange enhanced anisotropy in ferromagnetic/antiferromagnetic multilayers: dynamic consequences

R. L. Stamps、K. Usadel2005-12-02arXiv

The phenomena of exchange anisotropy is well known in terms of static magnetization properties such as enhanced coercivity and magnetization loop shifts. These effects are primarily associated with effective anisotropies introduced into the ferromagnet by exchange coupling with a strongly anisotropic antiferromagnet.…

Materials Sciencecond-mat.stat-mech

Cholesterol‐Aided Supramolecular Control over Chromophore Packing: Twisted and Coiled Helices with Distinct Optical, Chiroptical, and Morphological Features

Ayyappanpillai Ajayaghosh、Chakkooth Vijayakumar、Reji Varghese 等 4 位作者2005-12-02Angewandte Chemie International Edition

Good cholesterol: Oligo(p-phenylenevinylene)s (OPVs) that are mono- or disubstituted with cholesterol moieties form pseudo-J and pseudo-H aggregates, respectively (see picture), which lead to coiled and twisted helical structures with distinct optical, chiroptical, and morphological properties.

Luminescence and Fluorescent MaterialsSynthesis and Properties of Aromatic CompoundsSupramolecular Self-Assembly in Materials

The frustration-based approach of supercooled liquids and the glass transition: a review and critical assessment

G Tarjus、S A Kivelson、Z Nussinov 等 4 位作者2005-12-02OpenAlex

One of the most spectacular phenomena in physics in terms of dynamical range is the glass transition and the associated slowing down of flow and relaxation with decreasing temperature. That it occurs in many different liquids seems to call for a ‘universal’ theory. In this article, we review one such theoretical appro…

Material Dynamics and PropertiesGlass properties and applicationsAdvanced Physical and Chemical Molecular Interactions

Immobilisation of radioactive waste in glasses, glass composite materials and ceramics

William Lee、Michael I. Ojovan、Martin C. Stennett 等 4 位作者2005-12-02OpenAlex

The basic principles of incorporating high level radioactive waste into glasses, ceramics (Synroc type) and glass composites including glass ceramics are described. Current UK technology uses glass wasteforms for the products of reprocessing, although many countries are temporarily storing the ceramic spent fuel for e…

Rock Mechanics and ModelingRecycling and utilization of industrial and municipal waste in materials productionNuclear materials and radiation effects

Thermal quenching of Eu 2+ 5d–4f luminescence in inorganic compounds

P. Dorenbos2005-12-02OpenAlex

The thermal quenching of Eu 2+ 5d–4f emission on Ba, Sr, or Ca sites in compounds is often attributed to a large displacement between the ground state and excited state in the configuration coordinate diagram. This work will demonstrate that the ionization of the 5d electron to conduction band states is the genuine qu…

Luminescence Properties of Advanced MaterialsRadiation Detection and Scintillator TechnologiesSolid-state spectroscopy and crystallography

A Novel Photon Radiation Detector System for In Vitro Biokinetic Measurements

Jenny Oddstig、Peter Bernhardt、Lars Jacobsson 等 4 位作者2005-12-01Cancer Biotherapy and Radiopharmaceuticals

OBJECTIVE: This study evaluates a novel photon radiation detector system for in vitro biokinetic measurements. METHODS: A cell-culture well can be considered to consist of two different compartments: the cells and the medium. By placing the well on a lead-collimated scintillation (NaI(T1)) detector, changes in activit…

Advanced Radiotherapy TechniquesRadiation Detection and Scintillator TechnologiesRadiation Shielding Materials Analysis

Electronic effects on carbon monoxide dissociation from iron(II) tetraphenylporhyrins

Marco A. Lopez、Martha A. De La Rosa2005-12-01Journal of Porphyrins and Phthalocyanines

We report the kinetics of CO binding to a series of substituted ferrous tetra(4-X-phenyl)porphyrins ( X = CF 3 , Cl , H , CH 3 , OCH 3 ) in DMSO solvent using a mixture of 1,2-DMI/1-MeIm as proximal base. The CO dissociation rate constant increases with electron donation of the substituent X; the aggregate Hammett ρ v…

Porphyrin and Phthalocyanine ChemistryHeme Oxygenase-1 and Carbon MonoxideHemoglobin structure and function

Synthesis and characterization of 4- and 6-arm star-shaped poly(ε-caprolactone)s

Michaël A. R. Meier、Ulrich S. Schubert2005-12-01e-Polymers

Abstract Star-shaped poly(ε-caprolactone) (PCL) polymers were synthesized and fully characterized by gel permeation chromatography, matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS) as well as 1 H NMR spectroscopy. First a series of four-armed PCLs with different molecular wei…

biodegradable polymer synthesis and propertiesElectrospun Nanofibers in Biomedical ApplicationsSilicone and Siloxane Chemistry