Javier Garı́n、J. Orduna、Santiago Uriel 等 8 位作者1994-01-01Synthesis
All articles of this category Reproducible, high-yielding synthesis of the title compounds 2-4 , which are important precursors of highly functionalised tetrathiafulvalene derivatives and multistage redox assemblies, are described. This is demonstrated by the subsequent reactions of 3 and 4 to prepare compounds 9-16 ;…
Magnetism in coordination complexesOrganic and Molecular Conductors Research
Steven R. Craig、Gerard P. Hastie、Kevin J. Roberts 等 4 位作者1994-01-01Journal of Materials Chemistry
High-resolution X-ray powder diffraction using synchrotron radiation has been used to determine the unit-cell parameters of some of the n-alkanes within the range C13H28–C60H122. These have, in general, been found to conform to the structural patterns predicted by Nyburg and Potworowski (Acta Crystallogr., Sect. B, 19…
Crystallography and molecular interactionsX-ray Diffraction in CrystallographyPolymer Synthesis and Characterization
P. Czarnecki、W. Nawrocik、Z. Pająk 等 4 位作者1994-01-01Physical review. B, Condensed matter
The differential thermal analysis of a single crystal of pyridinium tetrafluoroborate was performed revealing two solid-solid phase transitions at 205 and 240 K. The real part of the dielectric permittivity was measured between 190 and 290 K. The large anomaly at the higher phase transition is interpreted as the Curie…
Nonlinear Optical Materials ResearchAcoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallography
Derck Schlettwein、Dieter Woehrle、E. Karmann 等 4 位作者1994-01-01Chemistry of Materials
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConduction type of substituted tetraazaporphyrins and perylene tetracarboxylic acid diimides as detected by thermoelectric power measurementsD. Schlettwein, D. Woehrle, E. Karmann, and U. MelvilleCite this: Chem. Mater. 1994, 6, 1, 3–6Publication Date (Print):January 1, 1994…
Porphyrin and Phthalocyanine ChemistryMolecular Junctions and NanostructuresPhotochemistry and Electron Transfer Studies
Leonard Hollaway1994-01-01Woodhead Publishing Limited eBooks
I. Introduction Fibre Reinforced Polymers History of fibre reinforced polymer materials Resins Additives to resins Reinforcements Properties of composite materials Health and safety II. Techniques for Manufacture of Composites Manufacturing Processes Introduction Open mould processes Closed mould processes Continuous…
Material Properties and ApplicationsMechanical and Thermal Properties Analysis
J.M. Benedetto、R.A. Moore、F. B. McLean1994-01-01Journal of Applied Physics
The fast-decay component of the retained polarization in lead zirconate titanate ferroelectric capacitors was examined as a function of write/read voltage, number of cycles (fatigue), and temperature. The percentage of polarization loss within 1 s after the write pulse was found to be independent of the write/read vol…
Ferroelectric and Piezoelectric MaterialsPolymer crystallization and propertiesConducting polymers and applications
Masayuki Ieda、M. Nagao、Masayuki Hikita1994-01-01IEEE Transactions on Dielectrics and Electrical Insulation
We review the results of electrical conduction and breakdown research reported mainly after 1980 in Japan, and comment on the present situation and future prospect of research work in this field. Effects of introduction of polar groups into polymers on electric strength F/sub b/ are summarized. Influences of copolymer…
Advanced Sensor and Energy Harvesting MaterialsHigh voltage insulation and dielectric phenomenaPower Transformer Diagnostics and Insulation
Xichen Zhang、U.P. Wyss、David R. Pichora 等 4 位作者1994-01-01Journal of Bioactive and Compatible Polymers
To elucidate the degradation mechanism of poly(lactic acid), the decrease in the intrinsic viscosity of poly(D,L-lactide) in a homogeneous water/ acetone solution was investigated. The hydrolysis of poly(D,L-lactic acid) in water/acetone solution can be catalyzed by protons. The molecular weight degradation of solid p…
Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesBiopolymer Synthesis and Applications
S.S. Lopatin、Irina Lopatina、I. V. Lisnevskaya1994-01-01Ferroelectrics
The PZT/ferrite composite materials of different types of connectivity were prepared and investigated. The firing of powder mixtures, hot pressing, alternative slicing of piezoelectric ceramic and ferrite and other techniques were used to produce the magnetoelectric composites. The most high values of the magnetoelect…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Phenomena ResearchMultiferroics and related materials
Naoto Oku、Yukihiro Namba1994-01-01PubMed
Liposomes have been investigated for use as drug carriers, and many previous studies have demonstrated enhanced efficacy of encapsulated drugs and the reduction of the side effects of drugs so entrapped. In many cases liposomal drugs are administered via the bloodstream. The stability in the bloodstream, clearance, an…
Nanoparticle-Based Drug DeliveryCancer, Hypoxia, and MetabolismRadiopharmaceutical Chemistry and Applications
J.L. Nowiński、Philip Lightfoot、Peter G. Bruce1994-01-01Journal of Materials Chemistry
The crystal structure of lithium bis(trifluoromethanesulfonimide)[LiN(CF3SO2)2] has been solved from X-ray powder diffraction data and refined by the Rietveld method. The salt crystallises in the orthorhombic system, space group Pnaa, a= 9.6351(2)Å, b= 5.4154(1)Å, c= 16.2639(3)Å. The anion, previously uncharacterised…
Chemical Synthesis and CharacterizationInorganic Chemistry and MaterialsX-ray Diffraction in Crystallography
Vivi Ziv、Stephen Weiner1994-01-01Connective Tissue Research
Bone crystals are particularly small and hence estimating their sizes have proved to be difficult and values obtained inconsistent. Here we use rat bone crystals of different ages, as well as different synthetic carbonate apatite crystals, to compare two methods commonly used for determining bone crystal sizes. One me…
Calcium Carbonate Crystallization and InhibitionCrystallization and Solubility StudiesX-ray Diffraction in Crystallography
Claude Binet、Ahmed Badri、Magali Boutonnet-Kizling 等 4 位作者1994-01-01Journal of the Chemical Society Faraday Transactions
CO has been adsorbed in doses at room temperature by ceria which had been reduced with CO and then evacuated at 873 K, or only evacuated at this temperature, as well as by a Pd/CeO2 catalyst, H2-reduced and evacuated at 823 K. From comparison of the observed IR spectra with literature results concerning matrix-isolate…
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
Bert M. Weckhuysen、An Verberckmoes、An L. Buttiens 等 4 位作者1994-01-01The Journal of Physical Chemistry
The diffuse reflectance spectra of a series of chromium-supported silica aluminas, with varying SiO2 content, have been investigated before and after drying and after calcination, successive CO reductions, and recalcination. The molecular structure of chromium before drying is influenced by the isoelectric point (IEP)…
Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
Daniele Hoffmann、Walter Bauer、Frank Hampel 等 10 位作者1994-01-01Journal of the American Chemical Society
The metalation of toluene (PhCH3) with a 1: 1 mixtureof n-BuLi/MOtBu (M = K, Rb) at ambient temperature affords orange-red powders of benzylpotassium or benzylrubidium. On addition of N,N,N’,N“,N“-pentamethyldiethylenetriamine (PMDTA) the precipitates dissolve to give burgundy-red solutions, from which needles of [PhC…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
A. Christou1994-01-01Wiley eBooks
Reliability and Electromigration Degradation of GaAs Microwave Monolithic Integrated Circuits (A. Christou). Simulation and Computer Models for Electromigration (P. Tang). Temperature Dependencies on Electromigration (M. Pecht & P. Lall). Electromigration and Related Failure Mechanisms in VLSI Metallizations (A. Chris…
Electronic Packaging and Soldering TechnologiesCopper Interconnects and ReliabilitySemiconductor materials and interfaces
Min Yang、Daming Huang、Pinghai Hao 等 6 位作者1994-01-01Journal of Applied Physics
The correlation between the Raman peak shift and the linewidth of porous silicon is studied. The experimental result does not fit with the relationship predicted by the phonon confinement model. By taking into account both the phonon confinement and the effect of strain, the calculated Raman line shape coincides fairl…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Hae Jin Park、J. M. Bunn、Curtis L. Weller 等 5 位作者1994-01-01Transactions of the ASAE
Grain protein-based films containing mixtures of glycerin and polyethylene glycol (PEG) as plasticizers were prepared and evaluated for water vapor permeability (WVP), tensile strength (TS), and elongation (E). Changes in mechanical properties during storage were also studied. The PEG produced opposite trends in E of…
Nanocomposite Films for Food PackagingConducting polymers and applicationsElectrospun Nanofibers in Biomedical Applications
Claudio Migliaresi、Luca Fambri、Daniel Cohn1994-01-01Journal of Biomaterials Science Polymer Edition
The in vitro degradation of samples of L- and D,L-lactic acid polymers, P(L)LA and P(DL)LA respectively, having different molecular weights, morphology and/or geometry, has been studied through the determination of viscometric molecular weight, mass and mechanical properties as function of the immersion time in Ringer…
Bone Tissue Engineering MaterialsAdvanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and properties
M. W. Matsen、M. Schick1994-01-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLamellar phase of a symmetric triblock copolymerM. W. Matsen and M. SchickCite this: Macromolecules 1994, 27, 1, 187–192Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://pubs.acs.org/doi/10.1021/ma00…
Block Copolymer Self-AssemblyLubricants and Their AdditivesElectrostatics and Colloid Interactions