Stéphane A. Baudron、Narcis Avarvari、Patrick Batail 等 7 位作者2003-08-27Journal of the American Chemical Society
The deliberate design of a series of single crystals of conducting two-dimensional radical cation salts of o-bis(amide)-appended ethylenedithiotetrathiafulvalene, beta'-[EDT-TTF-(CONH(2))(2)](2)X (X = HSO(4)(-), ClO(4)(-), ReO(4)(-), or AsF(6)(-)) and of their parent monocomponent solid EDT-TTF-(CONH(2))(2) is demonst…
Crystallography and molecular interactionsOrganic and Molecular Conductors ResearchSolid-state spectroscopy and crystallography
M.W. Vetting、Steven L. Roderick、Michael Yu 等 4 位作者2003-08-27Protein Science
Mycothiol is the predominant low-molecular weight thiol produced by actinomycetes, including Mycobacterium tuberculosis. The last reaction in the biosynthetic pathway for mycothiol is catalyzed by mycothiol synthase (MshD), which acetylates the cysteinyl amine of cysteine-glucosamine-inositol (Cys-GlcN-Ins). The cryst…
Enzyme Structure and FunctionPolyamine Metabolism and ApplicationsBiochemical and Molecular Research
David M. Anstrom、Karen Kallio、S. James Remington2003-08-27Protein Science
Malate synthase, an enzyme of the glyoxylate pathway, catalyzes the condensation and subsequent hydrolysis of acetyl-coenzyme A (acetyl-CoA) and glyoxylate to form malate and CoA. In the present study, we present the 1.95 A-resolution crystal structure of Escherichia coli malate synthase isoform G in complex with magn…
Enzyme Structure and FunctionPorphyrin Metabolism and DisordersBiochemical and Molecular Research
Keith A. Oberg、Jean‐Marie Ruysschaert、Erik Goormaghtigh2003-08-27Protein Science
Protein basis sets have been extensively used as reference data for the determination of protein structure with optical methods such as circular dichroism and infrared spectroscopies. We have taken a new approach to basis protein selection by utilizing three crystal structure classification databases: CATH, SCOP, and…
Protein Structure and DynamicsMass Spectrometry Techniques and ApplicationsEnzyme Structure and Function
Qian Zhao、Edward T. Samulski2003-08-27Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSupercritical CO2-Mediated Intercalation of PEO in ClayQian Zhao and Edward T. SamulskiView Author Information Curriculum in Applied and Materials Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27…
Carbon Nanotubes in CompositesIonic liquids properties and applicationsPolymer Nanocomposites and Properties
Kristoffer K. Stokes、Karine Heuzé、Richard D. McCullough2003-08-27Macromolecules
Here we present the synthesis of both regioregular amphiphilic polythiophenes carrying a phosphonic acid on alternating side chains ( 8 ) and a regioregular polythiophene polyelectrolyte carrying a phosphonic acid side chain ( 14 ). We present the cation self-assembly and colorimetric changes of these regioregular pol…
Synthetic Organic Chemistry MethodsDendrimers and Hyperbranched PolymersOrganophosphorus compounds synthesis
Jeffrey J. Rack、Nicholas V. Mockus2003-08-27Inorganic Chemistry
We report on phototriggered Ru-S --> Ru-O and thermal Ru-O --> Ru-S intramolecular linkage isomerizations in cis- and trans-[Ru(bpy)2(dmso)2]2+. The cis complex features only S-bonded sulfoxides (cis-[S,S]), whereas the trans isomer is characterized by S- and O-bonded dmso ligands. Both cis-[S,S] and trans-[S,O] exhib…
Molecular Sensors and Ion DetectionPorphyrin and Phthalocyanine ChemistryPhotochromic and Fluorescence Chemistry
Fulvio Bisi、Eugene C. Gartland、Riccardo Rosso 等 4 位作者2003-08-27Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
Within the Landau-de Gennes theory of liquid crystals, we study the equilibrium configurations of a nematic cell with twist boundary conditions. Under the assumption that the order tensor Q be uniaxial on both bounding plates, we find three separate classes of solutions, one of which contains the absolute energy minim…
Liquid Crystal Research AdvancementsNonlinear Dynamics and Pattern FormationAdvanced Differential Equations and Dynamical Systems
Aldo Boglietti、Andrea Cavagnino、Luca Ferraris 等 4 位作者2003-08-27OpenAlex
The paper presents a method to determine the deterioration effects due to the punching process on soft magnetic materials used in electrical machines. Furthermore the possibility to recovery the magnetic and energetic original properties by mean of subsequent annealing treatments is reported too. The proposed methodol…
Electric Motor Design and AnalysisMicrostructure and Mechanical Properties of SteelsMagnetic Properties and Applications
Patrick A. Gerin、M. Genet、A. J. Herbillon 等 4 位作者2003-08-27European Journal of Soil Science
Summary The surface composition of particles present in the fine earth (< 2 mm) of 50 soil horizons differing in composition and pedogenetic origin (13 soil profiles) was analysed by X‐ray photoelectron spectroscopy (XPS) to assess the capability and limitations of this technique and to gain better knowledge of the…
Radioactive element chemistry and processingIron oxide chemistry and applicationsElectron and X-Ray Spectroscopy Techniques
Wonwoo Nam、So-Young Oh、Ying Sun 等 7 位作者2003-08-27The Journal of Organic Chemistry
The catalytic epoxidation of cyclohexene by iron(III) porphyrin complexes and H2O2 has been investigated in alcohol solvents to understand factors affecting the catalyst activity in protic solvents. The yields of cyclohexene oxide and the Fe(III/II) reduction potentials of iron porphyrin complexes were significantly a…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsHeme Oxygenase-1 and Carbon Monoxide
Wen-Rong Chang、Yean-Kuen Fang、S.F. Ting 等 7 位作者2003-08-27IEEE Electron Device Letters
A visible-blind ultraviolet (UV) photodetector (PD) with metal-semiconductor-metal (MSM) structure has been developed on a cubic-crystalline SiCN film. The cubic-crystalline SiCN film was deposited on Si substrate with rapid thermal chemical vapor deposition (RTCVD). The optoelectron performances of the SiCN-MSM PD ha…
ZnO doping and propertiesGaN-based semiconductor devices and materialsGa2O3 and related materials
Seung Chul Lyu、Bao Chun Liu、Cheol Jin Lee 等 6 位作者2003-08-27Chemistry of Materials
High-quality double-walled carbon nanotubes (DWNTs) have been produced by catalytic decomposition of benzene over Fe−Mo/Al 2 O 3 catalyst at 900 °C. The produced carbon materials are DWNT bundles free of amorphous carbon covering on the surface. DWNTs have inner tube diameters in the range of 0.69−2.53 nm and outer tu…
Carbon Nanotubes in CompositesGraphene research and applicationsFiber-reinforced polymer composites
A.A. Oliner2003-08-27OpenAlex
Until now, structures that exhibited negative-refractive-index properties were 3D in form and employed resonant elements. It is widely believed that such resonant elements are essential. The present paper introduces two new features: non-resonant elements in the periodic array, and the adaptation of these ideas to pla…
Metamaterials and Metasurfaces ApplicationsPhotonic Crystals and ApplicationsAdvanced Antenna and Metasurface Technologies
Anton V. Persikov、John A. M. Ramshaw、Alan Kirkpatrick 等 4 位作者2003-08-27Journal of the American Chemical Society
Peptide models have proved important in defining the structural features of the collagen triple-helix. Some models are based on multiple repeats of a given tripeptide unit, while a host-guest design includes an individual tripeptide unit substituted within a constant repeating Pro-Hyp-Gly framework. In the present stu…
Protein Hydrolysis and Bioactive PeptidesEnzyme Production and CharacterizationCollagen: Extraction and Characterization
Liming Dai、Pingang He、Sinan Li2003-08-27Nanotechnology
It has been long recognized that surface properties are of paramount importance for a broad range of materials and a large variety of devices. The recent development of nanoscience and nanotechnology has opened up novel fundamental and applied frontiers in surface functionalization and characterization. At the nanomet…
Carbon Nanotubes in CompositesGraphene research and applicationsGraphene and Nanomaterials Applications
Tapan Chatterji、François Fauth、B. Ouladdiaf 等 5 位作者2003-08-27Physical review. B, Condensed matter
We have investigated the Jahn-Teller transition accompanied by the orbital order-disorder transition in ${\mathrm{LaMnO}}_{3}$ by high temperature x-ray powder diffraction with synchrotron radiation and also neutron powder diffraction. The unit cell volume of ${\mathrm{LaMnO}}_{3}$ decreases with increasing temperatur…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
I.-H. Lin、Christophe Caloz、T. Itoh2003-08-27OpenAlex
A branch-line coupler (BLC) working at two arbitrary frequencies using left-handed (LH) transmission lines (TLs) is presented. The analysis of the structure is based on the even-odd mode analysis of the conventional BLC as well as a recently developed model for the LH-TL. We demonstrate that the two operating frequenc…
Metamaterials and Metasurfaces ApplicationsMicrowave Engineering and WaveguidesAdvanced Antenna and Metasurface Technologies
Xiaobo Tan、John S. Baras2003-08-27OpenAlex
The rate-dependent hysteresis existing in magnetostrictive actuators presents a challenge in control of these actuators. In this paper we propose a novel dynamical model for the hysteresis in a thin magnetostrictive actuator. The model features the coupling of the Preisach operator with an ordinary differential equati…
Electric Motor Design and AnalysisMagnetic Properties and ApplicationsPiezoelectric Actuators and Control
B. I. Belevtsev2003-08-27arXiv
It is suggested that extrinsic inhomogeneities in mixed-valence manganites deserve more attention and they should be taking into account on equal footing with hypothetical phase separation while examinating experimental data and developing the theoretical models of influence of stoichiometric and other types of inhomo…
Materials ScienceStrongly Correlated Electrons