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第 236709 / 240009 页 · 当前展示 4,734,161–4,734,180 / 4,800,171 条匹配结果 · 摘要仅作预览

Self assembly of isostructural copper( I )-silver( I ) butterfly clusters with 2-mercaptothiazoline; syntheses and structures of (PPh 3 ) 2 Cu 4 (C 3 H 4 NS 2 ) 4 , [(C 5 H 5 N)Cu 4 (C 3 H 4 NS 2 ) 4 ] n , (PPh 3 ) 2 Ag 4 (C 3 H 4 NS 2 ) 4 and (PPh 3 ) 2 Ag 2 Cu 2 (C 3 H 4 NS 2 ) 4

John P. Fackler、César A. López、Richard J. Staples 等 6 位作者1992-01-01Journal of the Chemical Society Chemical Communications

The crystal structures of tetranuclear butterfly clusters of CuI, AgI and the mixed metal AgI2CuI2 compound as obtained by reaction of the metal acetates with 2-mercaptothiazoline, and subsequent treatment of the insoluble polymeric clusters with organic bases are reported.

Metal complexes synthesis and propertiesMagnetism in coordination complexesNanocluster Synthesis and Applications

The Tungsten-Containing Aldehyde Oxidoreductase fromClostridium thermoaceticumand its Complex with a Viologen-Accepting NADPH Oxidoreductase

Gerhard STROBL、Richard Feicht、Hiltrud White 等 5 位作者1992-01-01Biological Chemistry Hoppe-Seyler

Purification of aldehyde oxidoreductase from C. thermoaceticum, the first detected enzyme able to reduce reversibly non-activated carboxylic acids to the corresponding aldehydes (White, H., Strobl, G., Feicht, R. & Simon, H. (1989) Eur. J. Biochem. 184, 89-96), results in the generation of multiple forms of the enzyme…

Enzyme Structure and FunctionMicrobial metabolism and enzyme functionAmino Acid Enzymes and Metabolism

Microstructure and Textures of Ods Ferritic Alloys Obtained by Mechanical Alloying

Jesús A. del Alamo、H. Réglé、Gérard Pons 等 4 位作者1992-01-01Materials science forum

The microstructure of two commercial alloys MA956 and MA957 obtained by mechanical alloying has been investigated. These Oxide Dispersion Strengthened (ODS) ferritic materials display particular microstructures and behaviours under heat treatments. Recrystallization phenomena depends on a lot of material processing pa…

High-Temperature Coating BehaviorsAdditive Manufacturing Materials and ProcessesMetal Alloys Wear and Properties

Preparation and characterization of superhydrophobic FEP-Teflon surfaces

H.J. Busscher、I. Stokroos、Henny C. van der Mei 等 5 位作者1992-01-01Journal of Adhesion Science and Technology

Abstraet-Supcrhydrophohic FEP-Teflon was prepared by argon ion etching followed by oxygen glow discharge treatment of commercially available FEP-Teflon sheet material. This combined treatment yielded an increase in water contact angle from 109° to > 140°. Ion etching alone caused a small increase in surface roughness…

Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsAdhesion, Friction, and Surface Interactions

Cluster structures and stabilities from solid-state potentials. Application to silicon clusters

Si‐Dian Li、Roy L. Johnston、J.N. Murrell1992-01-01Journal of the Chemical Society Faraday Transactions

An empirical potential-energy function comprising two- and three-body terms, whose parameters have been determined from the properties of solid silicon, is used to study the structures and energies of silicon microclusters. For small clusters, densely packed (non-diamond) structures are found which are in broad agreem…

Graphene research and applicationsSilicon Nanostructures and PhotoluminescenceChemical and Physical Properties of Materials

Characterization of microporous amorphous alumina–boria

A. Delmastro、Giuseppe Gozzelino、Daniele Mazza 等 6 位作者1992-01-01Journal of the Chemical Society Faraday Transactions

Alumina-boria samples with B : (B + Al) 0–50 atom% have been prepared by an unconventional procedure consisting of the reductive decomposition of the mixture of nitrates in the presence of glycerol X-ray diffraction (XRD)-amorphous samples having surface areas of 380–470 m2 g–1 were obtained after calcination at 673 K…

Advanced ceramic materials synthesisZeolite Catalysis and SynthesisMesoporous Materials and Catalysis

Action of compounds from Mandevilla velutina on croton oil‐induced ear oedema in mice. A comparative study with steroidal and nonsteroidal antiinflammatory drugs

José C. Zanini、Yara S. Medeiros、Alexandre Bella Cruz 等 5 位作者1992-01-01Phytotherapy Research

Abstract The antioedematogenic activity of two natural pregnane compounds from Mandevilla velutina was evaluated against croton oil‐induced ear oedema in mice. For comparison the effects of nonsteroidal (indomethacin, phenidone and BW 755C) and steroidal (dexamethasone) antiinflammatory drugs were analysed. The purifi…

Natural product bioactivities and synthesisPlant Toxicity and Pharmacological PropertiesPhytochemistry and Bioactive Compounds

Harmonic and transient overvoltage analyses in arc furnace power systems

S.R. Mendis、D.A. Gonzalez1992-01-01IEEE Transactions on Industry Applications

The authors present guidelines for analyzing harmonics and transient overvoltages generated by arc furnaces. Computer simulation techniques for creating accurate models for the analysis of arc furnace power systems are also discussed. Simulation guidelines are outlined in detail to assist the power systems engineer in…

Welding Techniques and Residual StressesMagnetic Properties and ApplicationsMetal Alloys Wear and Properties

Anomalies in the TA-Phonon Branches of SrTiO 3 in the Quantum Paraelectric Regime

R. Vacher、J. Pelous、B. Hennion 等 6 位作者1992-01-01Europhysics Letters (EPL)

Brillouin and neutron-scattering measurements of TA-phonon branches are reported for SrTiO 3 at small wave vectors and at temperatures well below the 105 K structural transition. Anomalous softening in the former measurements, and dispersion in the latter, are found in the quantum paraelectric regime. Furthermore, an…

Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesElectronic and Structural Properties of Oxides

Narrow-angle forward light scattering from individual algal cells: implications for size and shape discrimination in flow cytometry

Alexander Cunningham、Giovanni A. Buonnacorsi1992-01-01Journal of Plankton Research

Single-cell forward light scattering patterns have been examined for four algal species (one pennate diatom, two green flagellates and one filamentous cyanobacterium), mounted statically in a focused laser beam. In all cases, the distribution of light intensity at narrow angles (within the first scattering lobe) is we…

Marine and coastal ecosystemsAlgal biology and biofuel productionDiatoms and Algae Research

Bonding properties of calcium gallium arsenide, Ca14GaAs11: a compound containing discrete GaAs4 tetrahedra and a hypervalent As3 polyatomic unit

R. F. Gallup、C. Y. Fong、Susan M. Kauzlarich1992-01-01Inorganic Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBonding properties of calcium gallium arsenide, Ca14GaAs11: a compound containing discrete GaAs4 tetrahedra and a hypervalent As3 polyatomic unitR. F. Gallup, C. Y. Fong, and Susan M. KauzlarichCite this: Inorg. Chem. 1992, 31, 1, 115–118Publication Date (Print):January 1, 1…

Rare-earth and actinide compoundsCrystal Structures and PropertiesInorganic Chemistry and Materials

Radiation-induced conductivity in electron-beam irradiated insulating polymer films

G.M. Yang、G. M. Sessler1992-01-01IEEE Transactions on Electrical Insulation

The radiation-induced conductivity (RIC) in polypropylene, polyethylene terephthalate, and polyimide due to electron-beam irradiation is measured with an external bias method and, in the case of polypropylene, also with a short-circuit method, as a function of dose rate and time of irradiation or total dose. The resul…

High voltage insulation and dielectric phenomenaPolymer Nanocomposite Synthesis and IrradiationElectrostatic Discharge in Electronics

Feature article. Molecular metals and superconductors

Allan E. Underhill1992-01-01Journal of Materials Chemistry

The field of molecular metals and superconductors has developed rapidly since the first molecular metal was discovered in the late 1960s. The most extensive range of compounds are based on planar organic donor molecules containing sulfur or selenium atoms and complex metal anions containing multi-sulfur ligands. This…

Fullerene Chemistry and ApplicationsSynthesis and Properties of Aromatic CompoundsOrganic and Molecular Conductors Research

Leaching of water-soluble plasticizers from polymeric films prepared from aqueous colloidal polymer dispersions

Roland Bodmeier、Ornlaksana Paeratakul1992-01-01Drug Development and Industrial Pharmacy

The leaching of water-soluble plasticizers from polymeric films prepared by casting and drying of plasticized colloidal polymer dispersions was investigated with respect to the type and concentration of plasticizer (triethyl citrate or triacetin), film thickness, type of colloidal polymer dispersions (acrylic: Eudragi…

Drug Solubulity and Delivery SystemsAdvanced Polymer Synthesis and CharacterizationPolymer Science and PVC

Effects of doping on the crystal structure of poly(3-alkylthiophene)

Tsuyoshi Kawai、Masahiro Nakazono、Katsumi Yoshino1992-01-01Journal of Materials Chemistry

The changes in the crystal structure of poly(3-alkylthiophene)s resulting from doping have been studied by X-ray diffraction measurements of electrochemically doped poly(3-alkylthiophene) films. The lattice parameter a, which corresponds to the distance between main chains along the side alkyl chain, increases upon do…

Organic Electronics and PhotovoltaicsConducting polymers and applicationsAnalytical Chemistry and Sensors

Study of electrodeposited tungsten trioxide thin films

Pei Kang Shen、A. C. C. Tseung1992-01-01Journal of Materials Chemistry

WO3 films have been electrodeposited in a solution containing dissolved tungsten and alcohol. The deposition conditions and the deposition efficiency on various substrates were studied. The properties of the electrodeposited WO3 film were characterised by electrochemical, surface analytical and in situ optical techniq…

Gas Sensing Nanomaterials and SensorsTransition Metal Oxide NanomaterialsAnalytical Chemistry and Sensors

Special issue "Magnesium and magnesium alloys". Age hardening characteristics and high temperature strength of Mg-Gd and Mg-Tb alloys.

S. Kamado、Shigeru Iwasawa、Kiyoaki OHUCHI 等 5 位作者1992-01-01Journal of Japan Institute of Light Metals

Magnesium alloys with Gadolinium or Terbium, whose content 20mass% was near the maximum solid solubility, were melted by means of a fluxless method and their age hardening behavior, mechanical properties at elevated temperature and physical properties were investigated. Both alloys exhibit considerable age hardening a…

Magnesium Alloys: Properties and ApplicationsHydrogen Storage and Materials

Calculation of the efficiency of optical resolutions on the basis of the binary phase diagram for the diastereoisomeric salts

Dávid Kozma、György Pokol、Mária Ács1992-01-01Journal of the Chemical Society Perkin Transactions 2

In resolutions based on the solubility difference between pairs of diastereoisomeric salts, the maximum efficiency (parameter S) can be calculated from a knowledge of the eutecic composition of the binary T–x diagram. We demonstrate that an approximate binary phase diagram can be determined from the DSC melting curve…

Surfactants and Colloidal SystemsCalcium Carbonate Crystallization and InhibitionCrystallization and Solubility Studies

Metal-catalyzed oxidative degradation of collagen

Kôji Uchida、Yoji Kato、Shunrô Kawakishi1992-01-01Journal of Agricultural and Food Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal-catalyzed oxidative degradation of collagenKoji. Uchida, Yoji. Kato, and Shunro. KawakishiCite this: J. Agric. Food Chem. 1992, 40, 1, 9–12Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 January 1992https://pubs…

Collagen: Extraction and Characterization

The Effects of Relative Humidity on Some Physical Properties of Modern Vellum: Implications for the Optimum Relative Humidity for the Display and Storage of Parchment

Eric Hansen、Steve N. Lee、H. Sobel1992-01-01Journal of the American Institute for Conservation

The effects of different relative humidities on some physical properties of three types of calfskin parchment (vellum) were investigated. Standard samples were subjected to (1) tensile fracture, and (2) measurement of the force that developed when the restrained samples were subjected to step decreases in relative hum…

Additive Manufacturing and 3D Printing TechnologiesCollagen: Extraction and Characterization