Tarimala Seshadri、H.‐J. Haupt1998-01-01Journal of Materials Chemistry
Ferrocene-based derivatives such as 4-{3-[4-(octyloxy)benzoyl]thioureido}phenyl 4-ferrocenylbenzoate and other higher homologues (n=12,16 and 18; n=length of alkoxy chain) were prepared by reacting 4-alkoxybenzoyl isothiocyanates with the corresponding amines containing the ferrocenyl moiety. Their mesomorphic propert…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesSurfactants and Colloidal Systems
Paola Marianelli、Alessandro Sbrana1998-01-01CINECA IRIS Institutial research information system (University of Pisa)
EDS analysis on standard samples of minerals and glasses. In this paper is reported the setting up of a EDS microanalitic system present at the laboratory of elec tron microscopy and microanalysis at the Dipartimento di Scienze della Terra of Pisa University. Pure element inten sity factors for the standardless softwa…
Extraction and Separation ProcessesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
Katsumi Ura1998-01-01Journal of Electron Microscopy
The main features of negatively charged images are: bright regions are always accompanied by a dark region, which corresponds to the region above connecting lines in LSI, and dark regions seem to encroach the bright region. These features are explained by a new model, which contains redistribution and multiplication o…
Electron and X-Ray Spectroscopy TechniquesNon-Destructive Testing TechniquesSurface and Thin Film Phenomena
S. Anfang、Klaus Harms、F. Weller 等 7 位作者1998-01-01Zeitschrift für anorganische und allgemeine Chemie
Die Titelverbindungen werden durch Reaktion der Cyclopentadienidchloride [M(C5H5)2Cl]2 mit LiNPPh3 in siedendem Toluol hergestellt und durch Kristallstrukturanalysen charakterisiert. Alle drei Verbindungen kristallisieren isotyp miteinander in der orthorhombischen Raumgruppe Pbca mit Z = 8. Zwei der drei Phosphanimina…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesSynthesis and characterization of novel inorganic/organometallic compounds
B.R. Varlow、D.W. Auckland1998-01-01IEEE Transactions on Dielectrics and Electrical Insulation
Emphasis is placed on the growing body of evidence demonstrating the importance of mechanical factors in the initiation and growth of electrical trees in solid polymeric insulating materials. Specimens using point-plane electrode geometries in homogeneous resins, with and without barrier inserts, have been investigate…
High voltage insulation and dielectric phenomenaStructural Health Monitoring TechniquesPower Transformer Diagnostics and Insulation
Albert Escuer、Ramón Vicente、Sujit Baran Kumar 等 4 位作者1998-01-01Journal of the Chemical Society Dalton Transactions
A new tetranuclear nickel compound, showing µ-CO3 bridges and butterfly topology has been synthesised and structurally characterised. The complex [Ni4(µ-CO3)2(aetpy)8][ClO4]4, where aetpy corresponds to (2-aminoethyl)pyridine, crystallises in the tetragonal system, space group P4(2)2(1)2 (no. 94), a = 14.523(4), c = 1…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Miho Yanagisawa、Satoshi Uchida、Yoshinobu Fujishiro 等 4 位作者1998-01-01Journal of Materials Chemistry
Titania pillared H 4 Nb 6 O 17 has been synthesised by the intercalation of [Ti(OH) x (CH 3 CO 2 ) y ] z+ followed by photodecomposition with UV light irradiation. The incorporation of TiO 2 in the interlayer of H 4 Nb 6 O 17 has been confirmed by powder X-ray diffraction, DTA, UV-VIS reflectance and BET measurements.…
Advanced Photocatalysis TechniquesPerovskite Materials and ApplicationsPolyoxometalates: Synthesis and Applications
C. Boulle、Piétrick Hudhomme、Michel Cariou 等 8 位作者1998-01-01Chemical Communications
A new and unexpected tetrathiafulvalene (TTF) core building process is observed via reaction of a 1,3-dithiole phosphonate anion with a 2-oxo-1,3-dithiole functionality.
Crystallography and molecular interactionsOrganic and Molecular Conductors ResearchSolid-state spectroscopy and crystallography
Z. Ali-Adib、Guy J. Clarkson、Neil B. McKeown 等 6 位作者1998-01-01Journal of Materials Chemistry
The synthesis and liquid crystalline properties of unsymmetrically substituted Pcs which contain both alkyl and hydroxy terminated tetra(ethyleneoxy) side-chains are described. Despite poor Langmuir-Blodgett film forming properties, the amphiphilic Pcs are of interest as they display a variety of columnar mesophases a…
Porphyrin and Phthalocyanine ChemistryPhotochromic and Fluorescence ChemistryOrganic Chemistry Cycloaddition Reactions
Mikio Ishiyama、Masato Mikami、Hitoyata Shimokawa 等 4 位作者1998-01-01Archivum histologicum japonicum
In the snake, Elaphe quadrivirgata, the occurrence of amelogenin was immunohistochemically demonstrated in the enamel of developing tooth germs. Teeth of the snake are covered with a thin true enamel layer about 1-2 microns in thickness. Light and electron microscopic immunohistochemistry indicated an intense amelogen…
Antimicrobial Peptides and ActivitiesSilk-based biomaterials and applications
Mark A. Cook、J. F. Harper1998-01-01Advances in Polymer Technology
Two magnesium hydroxide fillers of different morphology, but almost identical surface area, were incorporated into polypropylene to assess their nucleation properties. The platelet filler was found to reside parallel to the flow direction, whereas the pseudospherical filler resided isotropically within the matrix. The…
Polymer Nanocomposites and Propertiesbiodegradable polymer synthesis and propertiesFlame retardant materials and properties
Kazuko Yoshikawa、Koji Matsuchika、Shigenobu Arihara 等 5 位作者1998-01-01Chemical and Pharmaceutical Bulletin
The structural elucidation of six new related polyoxypregnane glycosides, gymnepregosides A (1), B (2), C (3), D (4), E (5) and F (6), together with two known compounds, from the roots of Gymnema alternifolium (Asclepiadaceae) was achieved through on a detailed study of 1H- and 13C-NMR spectral data and chemical means…
Phytochemistry and Biological ActivitiesPhytochemistry and Bioactive Compounds
H.F. van den Berg、J. O. Thomas、Wen Liu 等 4 位作者1998-01-01Solid State Ionics
X-ray acid neutron powder diffraction studies have been made on phase-pure LiNixMn2-xO4 (x = 0, 0.04, 0.18 and 0.33) substituted materials solely to establish how Ni substitutes into the spinel structure. Rietveld refinement showed all the materials to ha
Advancements in Battery MaterialsMagnetic Properties and Synthesis of FerritesX-ray Diffraction in Crystallography
Christopher L. Cahill、Biagio Gugliotta、John B. Parise 等 4 位作者1998-01-01Chemical Communications
A novel layered indium sulfide inorganic/organic composite material has been synthesized under solvothermal conditions and characterized via single crystal X-ray diffraction.
Perovskite Materials and ApplicationsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Mingliang Du、R. L. Opila、C. Case1998-01-01Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
The continuing trend toward miniaturization of integrated circuits is driving the development of low dielectric constant materials (k<3) and their integration with copper metallization. In this work, the interface formed between copper or titanium and low dielectric constant polymer was explored. Fluorinated po…
Semiconductor materials and devicesCopper Interconnects and ReliabilitySilicone and Siloxane Chemistry
Takeo Oku、Koichi Niihara、Katsuaki Suganuma1998-01-01Journal of Materials Chemistry
Carbon nanocapsules with SiC nanoparticles were produced by thermal decomposition of polyvinyl alcohol with SiC clusters at 500 °C in Ar gas atmosphere. High-resolution electron microscopy also showed the formation of carbon hollow structures such as nanoparticles, polyhedra, and clusters. The present work indicates t…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Muhammad Fiaz、M. Gilbert1998-01-01Advances in Polymer Technology
In this study the use of three different types of aminosilanes for crosslinking plasticized PVC was investigated. The processing techniques used were milling, followed by press molding and extrusion. The processing conditions were carefully adjusted to minimize premature crosslinking. Crosslinking was carried out by i…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesPolymer Science and PVC
Frank Mucha、Uwe Böhme1998-01-01Chemical Communications
Hexacoordinate silicon compounds and polymers with the tetradentate azomethine ligand N,N′-ethylenebis(2-hydroxyacetophenoneiminate) (H2salen*) have been prepared and characterized; the X-ray structure analysis of (salen*)SiF2 clearly demonstrates the octahedral coordination of the silicon atom.
Semiconductor materials and devicesSynthesis and characterization of novel inorganic/organometallic compoundsSilicone and Siloxane Chemistry
S. L. Bassner、Eric H. Klingenberg1998-01-01American Ceramic Society bulletin
PVA is a highly effective and versatile formulating tool because of its solution stability, its compatibility with many common formulation ingredients and its wide range of grades.
biodegradable polymer synthesis and properties
Alexandru Stancu、Leonard Spînu1998-01-01IEEE Transactions on Magnetics
In this paper, a dynamic (time and temperature dependent) Preisach model is described. In the Preisach plane one uses a double well potential distribution calculated with the Stoner-Wohlfarth model. Both static and dynamic interactions for a ultrafine particulate system are taken into account in order to simulate vari…
Magnetic properties of thin filmsShape Memory Alloy TransformationsMagnetic Properties and Applications