Robson M. Matos、John G. Verkade2003-01-01Journal of the Brazilian Chemical Society
Herein we report the syntheses and characterization of the novel title mono- and dinuclear compounds from pentacarbonyliron. They were obtained in a stepwise manner by UV irradiation of [Fe(CO)5] with the appropriate ligand in THF and were characterized by ¹H, 13C, 13C{¹H} 31P and 31P{¹H} NMR spectroscopy, by IR spect…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesPorphyrin and Phthalocyanine Chemistry
V. A. Gunyakov、S. M. Shibli̇2003-01-01Liquid Crystals
The infrared absorbance and the dispersion of the refractive indices in the region 0.49–0.63 μm of the discotic mesogen 2,3,6,7,10,11-hexaheptyloxytriphenylene were studied for the columnar and isotropic phases. The temperature dependence of the orientational order parameter S and the local field parameters of a light…
Liquid Crystal Research AdvancementsMolecular spectroscopy and chiralityChemical Thermodynamics and Molecular Structure
Irfan Ahmad Ansari、G. C. East、D. J. Johnson2003-01-01Journal of the Textile Institute
This is the fourth and final part in a series of research papers featuring structure-property relationships in natural cellulosic fibres; this part gives a comparative study made of the biodegradability of various fibres when buried in soil. The weight loss of the fibres after burial for different lengths of time was…
Natural Fiber Reinforced CompositesAdvanced Cellulose Research StudiesLignin and Wood Chemistry
Tiago H. Silva、Sérgio V. P. Barreira、Cosme Moura 等 4 位作者2003-01-01Portugaliae electrochimica acta
Polyelectrolyte thin films constructed using the method proposed by Decher and coworkers are studied using several electrochemical techniques, such as cyclic voltammetry and linear sweep voltammetry with rotative disc electrode. The main goal of this work is to evaluate the influence of the number of layers and the ch…
Conducting polymers and applicationsPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers
Mohamed Elaatmani、Abdelouahad Zegzouti、Francesco Capitelli 等 6 位作者2003-01-01Zeitschrift für Kristallographie - Crystalline Materials
Abstract Typical crystals Pb 0.75 K 1.80 Li 1.70 Nb 5 O 15 , belonging to tetragonal tungsten bronze materials, were grown by the slow cooling technique. The crystals were characterized at room temperature by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HREM). The structure, solved com…
Ferroelectric and Piezoelectric MaterialsSolid-state spectroscopy and crystallographyX-ray Diffraction in Crystallography
Mingjun Li、Kosuke Nagashio、Kazuhiko Kuribayashi2003-01-01The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics
Employing an aero-acoustic levitator, the Fe2O3-16.5 mol% La2O3 eutectic alloy was levitated, melted, undercooled and then solidified under a containerless condition when a continuous laser beam heating system was incorporated. By revealing the surface and cross-sectional microstructures, copious nucleation is confirm…
Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaMetallurgical Processes and Thermodynamics
Koichiro Fukuda、Shinji Inoue、Hideto Yoshida2003-01-01Journal of the American Ceramic Society
Four types of tricalcium aluminate solid solutions with different concentrations of Na 2 O and SiO 2 were prepared and examined using an electron probe microanalyzer. The atomic ratios, including those determined in a previous study, were derived from the oxide compositions and provided excellent correlations between…
Concrete and Cement Materials ResearchGlass properties and applicationsNuclear materials and radiation effects
Dietmar Janietz2003-01-01Molecular Crystals and Liquid Crystals
Supramolecular assemblies of radial multialkynylbenzene derivatives are presented which arise either from specific interactions with interfaces or from the covalent linkage of different molecular fragments. Surface-assisted molecular orientation control was investigated at the air/water interface, on photo-oriented az…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsSynthesis and Properties of Aromatic Compounds
Huadong Tang、Jin Sun、Xiaoshu Zhou 等 6 位作者2003-01-01Macromolecular Chemistry and Physics
Abstract A novel stereo‐regular organo‐bridged ladder‐like polymethylsiloxane ( LPMS ) was synthesized by a stepwise coupling polymerization on the basis of an amido H‐bonding‐assisted self‐assembling template. The monomer N,N′ ‐bis{4‐[3‐(diethoxymethylsilyl)propoxy]‐phenyl}terephthalamide ( M ), prepared by hydrosily…
Organoboron and organosilicon chemistryChemical Synthesis and ReactionsSilicone and Siloxane Chemistry
Tilak Dias、D Yahathugoda、Anura Fernando 等 4 位作者2003-01-01Journal of the Textile Institute
A theoretical model is proposed for prediction of the interface-pressure profile applied by plain-knitted elastomeric structures used in compression therapy. Compression therapy may be applied through pressure garments to prevent and reduce venous reflux and peripheral oedema. The interface pressure induced by a compr…
Thermoregulation and physiological responsesTextile materials and evaluationsBody Contouring and Surgery
Takeshi Kobayashi、Toru Maruyama、Tsutomu Yasuda2003-01-01MATERIALS TRANSACTIONS
Intake of lead is harmful to the human body. Therefore, it is necessary to substitute other alloying elements for lead in Cu alloys. Using a Cu–9.5 mass%Sn alloy powder and CaF2, which has sliding properties equal to lead, a composite sprayed coating (by flame spraying) was developed. The results were as follows. A co…
Tribology and Wear AnalysisMetal Alloys Wear and PropertiesPolymer Science and Applications
Nadège Pantoustier、Michaël Alexandre、Philippe Degée 等 8 位作者2003-01-01Composite Interfaces
Poly(ε-caprolactone) layered silicate nanocomposites were synthesized by in situ intercalative ring-opening polymerization (ROP) of ε-caprolactone. The polymerization was promoted by thermal or catalytic initiation starting from either non-modified natural sodium-montmorillonite (MMT-Na) or montmorillonite modified by…
Polymer Nanocomposites and Propertiesbiodegradable polymer synthesis and propertiesSilicone and Siloxane Chemistry
Wataru Kinase、Koji Harada2003-01-01Ferroelectrics
The ferroelectricity of the ABO 3 type perovskite-crystals CaTiO 3, SrTiO 3, BaTiO 3 and PbTiO 3 the local fields acting on the Ti ions are discussed. It is shown that the ferroelectricity in the last two crystals is related to the large electronic polarizability of Ba and Pb.
Acoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallography
V. F. Reutov、A. S. Sokhatskii2003-01-01Technical Physics
Thin transparent (for transmission electron microscopy, TEM) self-supported Si(001) films are irradiated on the (110) end face by low-energy ( E =17 keV) He + ions at doses ranging from 5×10 16 to 4.5×10 17 cm −2 at room temperature. The TEM study of the irradiated Si films along the ion range shows that an a-Si layer…
Thin-Film Transistor TechnologiesSilicon Nanostructures and PhotoluminescenceIon-surface interactions and analysis
Feng Cao、Xiaodong Li、Jae-Ho Ryu 等 4 位作者2003-01-01Journal of Materials Chemistry
Infusible but soluble polycarbosilane (PCS) was obtained by heating Yajima PCS at 300 °C for 1 h with 1– wt.% of polyborazine (PBN). The simple addition of PBN to PCS and subsequent heat treatment produced multiple effects on thermal conversion. It improved the ceramic yield of the polymers from 64% to 78%, and increa…
Advanced ceramic materials synthesisBoron and Carbon Nanomaterials ResearchAdvanced materials and composites
Toshio NAKATANI、Takahiro Wakita、Rikuo OTA 等 5 位作者2003-01-01Journal of the Ceramic Society of Japan
Powders in the CeO2-ZrO2-MOx system were prepared by coprecipitation method. Influence of adding a third components MOx of transition metal oxides and rare earth metal oxides on the specific surface area (SA) and oxygen storage capacity (OSC) were investigated. It was found that transition metal oxides decrease drasti…
Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsThermal and Kinetic Analysis
Djalma Medeiros、D.S. dos Santos、Tereza Neuma de Castro Dantas 等 6 位作者2003-01-01LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas)
Polyaniline (PAni) has been classified as an intractable polymer, particularly in its conducting form, the emeraldine salt (ES). Therefore one can consider the mixture of water and PAni as a suspension. The conducting form of PAni can be obtained by a doping process known as acid doping, in which a strong acid turns P…
Conducting polymers and applicationsSynthesis and properties of polymers
Michael E. Brown、P.K. Gallagher2003-01-01Medical Entomology and Zoology
1.INTRODUCTION 2.IMMERSION CALORIMETRY 3.THERMOPOROMETRY 4.SAMPLE CONTROLLED THERMAL ANALYSIS (SCTA) 5.ISOTHERMAL ADSORPTION MICROCALORIMETRY
Thermal and Kinetic Analysis
Slipenyuk、Glinchuk、Быков 等 8 位作者2003-01-01Condensed Matter Physics
ESR study of BaTiO 3 ferroelectrics doped with cerium or with niobium and strontium, both types of samples being doped with manganese, was performed at room temperature. In the samples of the first type the most intensive line with g-factor 1.9612 was shown to originate from paramagnetic center Ti 3+ -Ce 3+ . The smal…
Acoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallographyAdvanced Physical and Chemical Molecular Interactions
Kedyulich、Slivka、Gerzanich 等 5 位作者2003-01-01Condensed Matter Physics
Temperature dependences of longitudinal and transverse dielectric permeability of KDP and DKDP crystals are studied at different values of hydrostatic pressure in order to determine the pressure behaviour of the isotropic point for these crystals. The isotropic point temperature in KDP crystals at atmospheric pressure…
Inorganic and Organometallic ChemistrySolid-state spectroscopy and crystallography