Mehmet Kandaz、Sarah L. J. Michel、Brian M. Hoffman2003-10-01Journal of Porphyrins and Phthalocyanines
We report here for the first time a new and improved approach to the complete synthesis and characterization of the unsymmetrical metallo- and metal-free phthalocyanine/porphyrazine (Pz/Pc) hybrids bearing peripheral nitro or amine functionality, H 2 [ Pz (n- Pr ) 6 ( BzNO 2 )] or H 2 [ Pz (n- Pr ) 4 ( BzNO 2 ) 2 ], w…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryPorphyrin Metabolism and Disorders
Yoshiharu Okamoto、A Inoue、K Miyatake 等 6 位作者2003-10-01Macromolecular Bioscience
Abstract The effects of chitin/chitosan and their oligomers/monomers on the migrations of mouse peritoneal macrophage (PEM) and the rat macrophage cell line (rMp) were evaluated in vitro. In direct migratory assay using the blind well chamber method, the migratory activity of PEM was enhanced significantly by chitin a…
Nanocomposite Films for Food PackagingAdvanced Drug Delivery Systems
D. Wolf、V. Yamakov、Simon R. Phillpot 等 4 位作者2003-10-01International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde)
Abstract It is widely accepted that for the very smallest grain sizes (typically below 20–30 nm), dislocations play no significant role in the deformation of nanocrystalline materials. However, the grain-boundary mechanisms responsible for the reported decrease in strength with decreasing grain size in this regime (th…
Microstructure and mechanical propertiesMicrostructure and Mechanical Properties of SteelsForce Microscopy Techniques and Applications
K.G. Balmain、Andrea Lüttgen、P.C. Kremer2003-10-01IEEE Transactions on Antennas and Propagation
The metamaterial considered is a planar wire-grid network loaded with closely spaced, orthogonal capacitors and inductors, positioned over a ground plane and parallel to it. Excited by a single-frequency point source, this metamaterial exhibits conical high-field regions called "resonance cones" which extend outward f…
Antenna Design and AnalysisMetamaterials and Metasurfaces ApplicationsAdvanced Antenna and Metasurface Technologies
Yu Liu、Zhi Fan、Heng‐Yi Zhang 等 9 位作者2003-10-01The Journal of Organic Chemistry
A series of 6-O-(p-substituted phenyl)-modified beta-cyclodextrin derivatives, i.e., 6-O-(4-bromophenyl)-beta-CD (1), 6-O-(4-nitrophenyl)-beta-CD (2), 6-O-(4-formylphenyl)-beta-CD (3), 6-phenylselenyl-6-deoxy-beta-CD (4), and 6-O-(4-hydroxybenzoyl)-beta-CD (5), were synthesized, and their inclusion complexation behavi…
Drug Solubulity and Delivery SystemsCrystallography and molecular interactionsCrystallization and Solubility Studies
F. Laeri、Ferdi Shuth、Ulrich Simon 等 4 位作者2003-10-01Wiley-VCH eBooks
Ever since the discovery of ZSM-5 in the sixties, the templated synthesis of microporous materials has been a booming research field. More than one hundred structure types of microporous zeolites and aluminium phosphates have been synthesized and described. The templates are organic molecules with a carefully designed…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisPolyoxometalates: Synthesis and Applications
Jessica E. Wagenseil、Tetsuro Wakatsuki、Ruth J. Okamoto 等 5 位作者2003-10-01Journal of Biomechanical Engineering
Bio-artificial tissues are being developed as replacements for damaged biologic tissues. Their mechanical properties are critical for load bearing applications. Current testing protocols for bio-artificial tissues vary widely and often do not consider viscoelasticity. Uniaxial stretch tests were performed on fibroblas…
Bone Tissue Engineering MaterialsElasticity and Material ModelingCollagen: Extraction and Characterization
Stephen H. Garofalini、Weiwei Luo2003-10-01Journal of the American Ceramic Society
Molecular dynamics simulations were used to study the structure of calcium silicate intergranular films (IGFs) formed between the basal planes of silicon nitride crystals. A multibody potential was used to describe the interactions between ions. Samples with different film thickness and CaO contents were studied. Epit…
Ferroelectric and Piezoelectric MaterialsAdvanced ceramic materials synthesisAcoustic Wave Resonator Technologies
Martin Kilo、Robert A. Jackson、Günter Borchardt2003-10-01The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics
Defect structure and migration pathways of cations in cubic zirconia (ZrO2) have been calculated using two computer modelling techniques. The first is based on the Mott–Littleton method, which considers defects to be embedded in an otherwise perfect crystal, and the second is the supercell approach, which allows finit…
Advancements in Solid Oxide Fuel CellsNuclear Materials and PropertiesNuclear materials and radiation effects
Shui‐Ming Lu、Howard Alper2003-10-01Journal of the American Chemical Society
Rhodium-complexed dendrimers supported on a resin were evaluated as catalysts for the hydroformylation of aryl olefins and vinyl esters. The results showed the reactions proceeded very efficiently at room temperature with excellent yields. Outstanding selectivity for the branched aldehydes was also observed in all cas…
Chemical Synthesis and AnalysisSynthetic Organic Chemistry MethodsDendrimers and Hyperbranched Polymers
Yutaka Tokiwa、Amnat Jarerat2003-10-01Macromolecular Symposia
Abstract Polyester‐degrading ability of actinomycetes obtained from culture collections was investigated by the formation of clear zones on polyester‐emulsified agar plates. Using 41 genera (43 strains) of actinomycetes with phylogenetic affiliations based on 16S rRNA sequences, poly(L‐lactide) (PLA)‐degraders were fo…
biodegradable polymer synthesis and propertiesMicroplastics and Plastic PollutionCarbon dioxide utilization in catalysis
Finizia Auriemma、Claudio De Rosa2003-10-01Journal of the American Chemical Society
Syndiotactic polypropylene (sPP), despite high crystallinity, shows unusual elastic properties, associated with a reversible crystal-crystal phase transition. The mechanism behind the crystal-crystal phase transition involved during cyclic elongation and recovery and the time scale of this process is here investigated…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites
Xingxiang Li、Dianzhong Zhang、Valerie Lynch-Holm 等 5 位作者2003-10-01PLANT PHYSIOLOGY
The formation of calcium (Ca) oxalate crystals is considered to be a high-capacity mechanism for regulating Ca in many plants. Ca oxalate precipitation is not a stochastic process, suggesting the involvement of specific biochemical and cellular mechanisms. Microautoradiography of water lettuce (Pistia stratiotes) tiss…
Kidney Stones and Urolithiasis TreatmentsCalcium Carbonate Crystallization and InhibitionClay minerals and soil interactions
Radan Sedláček、Jan Kratochvı́l、Ewald Werner2003-10-01The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics
Evolution equations for scalar density and orientation of fields of curved dislocations formulated in the framework of the continuum theory of moving dislocations serve as the starting point for development of a non-local dislocation-based constitutive relation for crystal plasticity, on the length scale intermediate…
Microstructure and mechanical propertiesNonlocal and gradient elasticity in micro/nano structuresSurface Treatment and Residual Stress
Robert E. Melchers2003-10-01Journal of Offshore Mechanics and Arctic Engineering
In Part 1 of this paper, it was shown that statistical models using pooled data are of poor quality with very wide variability. The present paper considers probabilistic corrosion modelling based on corrosion mechanics principles and notes the effect of environmental and other factors that should be included in model…
Corrosion Behavior and InhibitionConcrete Corrosion and DurabilityStructural Integrity and Reliability Analysis
T. N. Ramesh、Ranga S. Jayashree、P. Vishnu Kamath2003-10-01Clays and Clay Minerals
Abstract Layered metal hydroxides exhibit non-uniform broadening of lines in their X-ray powder diffraction (XRPD) patterns, which cannot always be explained on the basis of crystallite size effects. In the case of hexagonal solids such as nickel hydroxide, DIFFaX simulations of the XRPD patterns show that: (1) stacki…
Zeolite Catalysis and SynthesisLayered Double Hydroxides Synthesis and ApplicationsChemical Synthesis and Characterization
Oleg Heczko、Ladislav Straka、K. Ullakko2003-10-01Journal de Physique IV (Proceedings)
Magnetic properties and magnetic shape memory effect of three Ni-Mn-Ga alloys representing three different martensitic phases; five-layered tetragonal (5M), seven-layered orthorhombic (7M), and non-modulated tetragonal (NM) martensite were studied at room temperature. Magnetization process occurs mostly by magnetizati…
Shape Memory Alloy TransformationsMagnetic Properties and Applications
Shuxiang Dong、Jiefang Li、D. Viehland2003-10-01IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control
It has been discovered that laminate composites of longitudinally magnetized magnetostrictive and transversely poled piezoelectric layers (a L-T laminate composite) have a giant magneto-electric (ME) effect under a low magnetic bias. The ME voltage coefficient is over 110 mV/Oe at a magnetic bias H=500 Oe. This value…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsAcoustic Wave Resonator Technologies
Kristian Mølhave、Dorte Madsen、Anne Marie Rasmussen 等 8 位作者2003-10-01Nano Letters
Direct writing with gold by electron beam deposition is a method for rapid fabrication of electrically conducting nanostructures. An environmental scanning electron microscope (ESEM) equipped with a source of the precursor gas dimethylacetylacetonate gold(III) was used to fabricate nanoscale tips and bridges. Transmis…
Carbon Nanotubes in CompositesAdvanced Electron Microscopy Techniques and ApplicationsIon-surface interactions and analysis
Xusheng Chen2003-10-01IEEE Transactions on Power Delivery
The first commercial demonstration of six-phase transmission, the Goudey-Oakdale three-phase/six-phase project, used two delta wye-grounded three-phase transformers to realize the required phase/voltage conversion. This paper proposes the usage of autotransformers for phase/voltage conversion for the actual three-phas…
Multilevel Inverters and ConvertersMagnetic Properties and ApplicationsAdvanced Electrical Measurement Techniques