Eileen M. Skelly Frame、Egidius E. Uzgiris1998-01-01The Analyst
The quantitative determination of Gd-containing magnetic resonance imaging (MRI) contrast agents in animal tissues is performed by both ICP-AES and ICP-MS. While ICP-AES has been used to determine Gd-containing contrast agents by other workers, no published methodology has been found. An accurate and precise method us…
Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesMRI in cancer diagnosis
P.D. Nellist、J. M. Rodenburg1998-01-01Acta Crystallographica Section A Foundations of Crystallography
A solution to the phase problem of electron diffraction is described which allows an aberration-free atomic resolution image of Si〈110〉, showing the expected dumbbell contrast, to be reconstructed at a resolution of 3 times the point resolution and 2.5 times the information limit of the scanning transmission electron…
Advanced Electron Microscopy Techniques and ApplicationsAdvanced X-ray Imaging TechniquesElectron and X-Ray Spectroscopy Techniques
A.T. Bulinski、J.‐P. Crine、B. Noirhomme 等 5 位作者1998-01-01IEEE Transactions on Dielectrics and Electrical Insulation
In order to determine whether or not oxidation of polymer influences water treeing, more than 200 vented and bow-tie trees from 31 field-aged cables were investigated. Micro-IR spectroscopy analysis has not shown any consistent excess of carbonyl content in water trees as compared with the adjacent non-treed regions o…
High voltage insulation and dielectric phenomenaPower Transformer Diagnostics and InsulationDielectric materials and actuators
Nuo Wang、Xue Wu1998-01-01Journal of Biomaterials Science Polymer Edition
Previously synthesized lactic/glycolic acid (PLGA) oligomers with different compositions (i.e. different ratio of lactic to glycolic acid in the oligomers) were further studied regarding their biodegradation and drug delivery application. The PLGA oligomers have fast biodegradation characteristics. They degrade to wat…
biodegradable polymer synthesis and propertiesMicrobial Metabolites in Food BiotechnologyBiopolymer Synthesis and Applications
Marc Mézard1998-01-01OpenAlex
The recently proposed strategy for studying the equilibrium thermodynamics of the glass phase using a molecular liquid is reviewed and tested in details on the solvable case of the p-spin model. We derive the general phase diagram, and confirm the validity of this procedure. We point out the efficacy of a system of tw…
Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesTheoretical and Computational Physics
Hervé Cartier、Guo‐Hua Hu1998-01-01Polymer Engineering and Science
Abstract This paper shows for the first time that when a monomer is to be grafted onto a polymer backbone by a free radical mechanism in a twin screw extruder, the grafting process occurs mainly, if not exclusively, in the plastification (melting) zone. For this purpose, the free radical grafting of glycidyl methacryl…
Polymer crystallization and propertiesNatural Fiber Reinforced Compositesbiodegradable polymer synthesis and properties
JJC Hoo、WB Green1998-01-01OpenAlex
Description This publication will advance the knowledge of those simple, yet complicated, devices known as anti-friction bearings, be they ball, roller, or needle. 33 peer-reviewed papers present the work of researchers from Austria, Belgium, China, France, Germany, Greece, Japan, Netherlands, Russia, Sweden, UK, and…
Metal Alloys Wear and Properties
Mohamed I. Zaki、Muhammd A. Hasan、Lata Pasupulety 等 4 位作者1998-01-01New Journal of Chemistry
α-Mn2O3 (containing a minor proportion of Mn5O8) was obtained by calcination of pure MnO2 at 700°C for 2 h. It was alkalized by impregnation of the parent dioxide with potassium and barium nitrate solutions prior to the calcination. K-Mn2O3 (α-Mn2O3+KMn8O16) and Ba-Mn2O3 (α-Mn2O3) thus respectively produced were subje…
Catalytic Processes in Materials ScienceMesoporous Materials and CatalysisIron oxide chemistry and applications
Roberto Paolesse、Tristano Boschi、Silvia Licoccia 等 5 位作者1998-01-01Chemical Communications
Reaction of 8,12-diethyl-2,3,7,13,17,18-hexamethylcorrole (1) with POCl3 in pyridine affords the first non-metal derivative of corrole; in this compound, 2, the phosphorus is in a pentavalent state and is different from analogous complexes of porphyrins.
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent Materials
Guo‐Cong Guo1998-01-01Chemical Communications
In the novel double salt Ag2C2·2AgClO4·2H2O, the C22– dianion [bond length 1.217(7) Å] is encapsulated inside an octahedral Ag6 cage, and the resulting cationic [C2@Ag6] units share corners to generate metallic layers between which the perchlorate anions and aqua ligands are accommodated.
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesNanocluster Synthesis and Applications
Stokroos、Kalicharan、J.J.L. van der Want 等 4 位作者1998-01-01Journal of Microscopy
Visualization of structural details of specimens in field emission scanning electron microscopy (FE-SEM) requires optimal conductivity. This paper reports on the differences in conductive layers of Au/Pd, Pt and Cr, with a thickness of 1.5–3.0 nm, deposited by planar magnetron sputtering devices. The coating units wer…
Semiconductor materials and devicesElectron and X-Ray Spectroscopy TechniquesIon-surface interactions and analysis
C. León、M. L. Lucı́a、J. Santamarı́a 等 4 位作者1998-01-01Physical review. B, Condensed matter
We present complex admittance measurements on single-crystal yttria-stabilized zirconia and polycrystalline ${\mathrm{Li}}_{0.5}{\mathrm{La}}_{0.5}{\mathrm{TiO}}_{3}$ over the frequency range 5 Hz to 30 MHz and at temperatures ranging between 150 and 650 K. Electric-field relaxation in both fast ionic conductors can b…
Material Dynamics and PropertiesIonic liquids properties and applicationsThermodynamic properties of mixtures
R.H.E. van Doorn、H. Kruidhof、Arian Nijmeijer 等 5 位作者1998-01-01Journal of Materials Chemistry
Perovskite powders of La0.3Sr0.7CoO3–δwere prepared by the thermal decomposition of precursor complexes derived from nitrate solutions using ethylenediaminetetraacetic acid (EDTA) as a complexing agent. The calcination temperature is 920 °C. Powders thus obtained have a low carbon contamination. Dense ceramics with a…
Catalytic Processes in Materials ScienceMagnetic and transport properties of perovskites and related materialsCatalysis and Oxidation Reactions
C.H. de Groot、K.H.J. Buschow、F.R. de Boer 等 4 位作者1998-01-01Journal of Applied Physics
Magnetic and structural properties of sintered NdFeB magnets with addition of various amounts of DyGa as a separate powder are studied and compared with single-powder magnets of the same nominal composition. When the magnets are annealed above 640 °C, the coercivity decreases strongly as compared to magnets annealed b…
Magnetic properties of thin filmsHydrogen Storage and MaterialsMagnetic Properties of Alloys
A. Vijayalakshmi、N. S. Gajbhiye1998-01-01Journal of Applied Physics
Nanosize particles of SrFe12O19 have been synthesized by a citrate precursor technique with various Fe/Sr ratios of 12.0 to 9.0. X-ray diffraction (XRD) studies showed the formation of ultrafine, monophasic SrFe12O19 particles with comparable unit cell parameters. Magnetic clusters were observed by scanning electron m…
Multiferroics and related materialsMagnetic Properties and Synthesis of FerritesIron oxide chemistry and applications
Makoto Ogawa1998-01-01Annual Reports Section C (Physical Chemistry)
M. Ogawa, Annu. Rep. Prog. Chem., Sect. C: Phys. Chem., 1998, 94, 209 DOI: 10.1039/PC094209
Advanced Photocatalysis TechniquesMesoporous Materials and CatalysisPorphyrin and Phthalocyanine Chemistry
Iwona B. Beech、Vttaly Zinkevich、R. Tapper 等 4 位作者1998-01-01Geomicrobiology Journal
A thermostable polysaccharide‐protein complex capable of accelerating the deterioration of mild steel was produced by a marine strain of sulfate‐reducing bacterium of the genus Desulfovibrio, and partially purified using low‐pressure chromatography. This complex induced pitting of steel in oxic aqueous solution. The i…
Corrosion Behavior and InhibitionCalcium Carbonate Crystallization and InhibitionBuilding materials and conservation
John M. Sweeten、C. B. Parnell、Bryan Shaw 等 4 位作者1998-01-01Transactions of the ASAE
The cattle feedlot industry is under increased scrutiny and regulatory involvement at state and national levelswith regard to particulate matter (PM) emissions from fugitive sources. Concentrations of total suspended particulatematter (TSP) and PM less than 10 micrometers (PM10) aerodynamic equivalent diameter (AED) w…
Cyclone Separators and Fluid DynamicsEngineering and Material Science ResearchNuclear and radioactivity studies
G.R Tomlinson、W.A Bullough1998-01-01Smart Materials and Structures
Hysteresis is present to varying degrees in virtually all dynamic smart material systems. In many applications, it can be limited through the choice of materials and operating regimes so that linear, anhysteretic models are applicable. With the advent of new high performance materials and more strin gent performance…
Solidification and crystal growth phenomenaMagnetic Properties and ApplicationsPiezoelectric Actuators and Control
Adel A. El‐Azhary、H. U. Suter、Jan Kubelka1998-01-01The Journal of Physical Chemistry A
Optimized geometries, vibrational frequencies, scale factors, and IR absorption intensities were calculated for the 1,2,3-triazole anion ( 1 ) at the B3LYP, LDA, BLYP, BVWN, HF, and MP2 levels of theory using the 6-31G** (BS1), 6-31++G** (BS2), cc-pVDZ (BS3) and aug-cc-pVDZ (BS4) basis sets and for 1,2,4-triazole ( 2…
Nonlinear Optical Materials ResearchSynthesis of Tetrazole DerivativesSynthesis and Characterization of Heterocyclic Compounds