Hirofumi Yoshimura、Kin rsquo ichi Kimura、Masayuki Hayashi 等 6 位作者1994-01-01Materials Transactions JIM
Titanium alloys absorb large amounts of hydrogen and it is desorbed in vacuum at elevated temperatures. This paper describes equiaxed grain refinement and the improvement of mechanical properties of titanium alloys utilizing this phenomenon. Particular attention has been paid to the control of three different types of…
Metal and Thin Film MechanicsHydrogen embrittlement and corrosion behaviors in metalsTitanium Alloys Microstructure and Properties
David W. Gunnells、Douglas J. Gardner、Michael P. Wolcott1994-01-01Wood and Fiber Science (Society of Wood Science and Technology)
A thorough understanding of the wood surface is required to engineer adhesive bonding in composite applications.A surface analysis technique, dynamic contact angle (DCA) analysis, was used to examine the effects of temperature on the wood surface as measured by the contact angle and surface energy.A hydrophobic surfac…
Surface Modification and SuperhydrophobicityAdditive Manufacturing and 3D Printing TechnologiesMaterial Properties and Processing
Koji Furukawa、Mitsuo Tagaya、Katsuyuki Tanizawa 等 4 位作者1994-01-01Journal of Biological Chemistry
Lys15 in Escherichia coli glycogen synthase, which is specifically labeled by adenosine diphosphopyridoxal, is mainly involved in binding of the substrate ADP-glucose (Furukawa, K., Tagaya, M., Tanizawa, K., and Fukui, T. (1993) J. Biol. Chem. 268, 23837-23842). We have found that the mutant glycogen synthase in which…
Fungal and yeast genetics researchMicrobial Metabolic Engineering and BioproductionEnzyme Structure and Function
William O.S. Doherty、O. L. Crees、E. Senogles1994-01-01Crystal Research and Technology
Abstract Two simple related methods for exclusively preparing well‐developed tetragonal bipyramidal crystals of calcium oxalate dihydrate at moderate supersaturations and at ambient temperature are reported. These crystals have an average length of 5.7–7.2 μm and are easy to wash and filter. One of the methods is suit…
Calcium Carbonate Crystallization and InhibitionClay minerals and soil interactionsCrystallization and Solubility Studies
J. Wańkowicz、Stanislaw Gubanski、W.D. Lampe1994-01-01IEEE Transactions on Dielectrics and Electrical Insulation
Studies are reported on decay and recovery of hydrophobic properties on clean and contaminated surfaces of silicone rubber based RTV coating. Treatment that led to hydrophobicity losses were water immersion and water condensation with and without a presence of dc electric field. Contact angles (receding angles) and su…
Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsHigh voltage insulation and dielectric phenomena
Ronald E. Loehman、Antoni P. Tomsia1994-01-01Journal of the American Ceramic Society
Mullite and ZrO 2 ‐toughened mullite (ZTM) were joined with Ag─Cu eutectic braze alloys that contain Ti or Zr as active elements. Although neither the alloy compositions nor the processing conditions were optimized, four‐point bend strengths of joined bars were as high as 108 MPa. Joining reactions were studied by con…
Advanced ceramic materials synthesisAdvanced materials and compositesNuclear materials and radiation effects
Éric Cloutet、Jean‐Luc Fillaut、Yves Gnanou 等 4 位作者1994-01-01Journal of the Chemical Society Chemical Communications
The hexafunctional initiator C6[(CH2)2p-C6H4CH(Cl)Me]6 is synthesized by Fe(η-C5H5)+ induced hexabenzylation of C6Me6 followed by regiospecific acetylation, NaBH4 reduction and chlorination, and allows the living cationic polymerization of styrene which yields hexaarm star-shaped polymers.
Advanced Polymer Synthesis and CharacterizationSupramolecular Chemistry and ComplexesDendrimers and Hyperbranched Polymers
Francesco Neve、Mauro Ghedini、Anne‐Marie Levelut 等 4 位作者1994-01-01Chemistry of Materials
A series of nonmesogenic N-acylated derivatives (2) of 1,10-diaza-4,7,13,16-tetrathiacyclooctadecane (1) affords stable cationic complexes upon reaction with [Cu(MeCN)4][PF6]. The products [Cu(2)] [PF6] show thermotropic mesomorphism as a result of copper(I) complexation. Optical microscopy, calorimetry, and low-resol…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesMolecular Junctions and Nanostructures
Takahiro Nakayama1994-01-01Journal of The Electrochemical Society
Sputtered multilayer films were studied by Fourier‐transform infrared spectroscopy (FTIR) and x‐ray diffraction (XRD), and their bonding structure and crystallization were compared with composite films. The thickness ratio of the multilayer films was fixed at 1:3, and the monolayer thickness was varied from 0.3 to 60…
ZnO doping and properties
PH Davies、R.R. Hosbons、M. Griffiths 等 4 位作者1994-01-01OpenAlex
Three coordinated research programs were undertaken on the fracture toughness of Zr-2.5Nb pressure tubes to determine relationships between irradiated and unirradiated values, the effect of long-term irradiation, and the causes of the variation in toughness. The present paper describes results from these programs and…
Fusion materials and technologiesNuclear reactor physics and engineeringNuclear Materials and Properties
Sara Olsson、Anders Berglund、Marie‐Louise Bergman1994-01-01Journal of Dental Research
The corrosion pattern of dental amalgam in aqueous media was interpreted theoretically by means of log(ai/a(ref))-pe diagrams. The definitions on which the diagrams were based were given, and their features were described. All sparingly soluble compounds which were expected to be formed in reactions with the solvents…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsElectrochemical Analysis and Applications
Bryan B. Sauer、David J. Walsh1994-01-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of solvent casting on reduced entanglement density in thin films studied by ellipsometry and neutron reflectionBryan B. Sauer and David J. WalshCite this: Macromolecules 1994, 27, 2, 432–440Publication Date (Print):January 1, 1994Publication History Published online1…
Material Dynamics and Propertiesnanoparticles nucleation surface interactionsSurface Roughness and Optical Measurements
Y.B. Wang、D. Wiards、D. H. Ryan 等 4 位作者1994-01-01IEEE Transactions on Magnetics
A series of RFe/sub 6/Ge/sub 6/ (B=Y, Gd, Tb, Er) compounds have been prepared by arc-melting. Structural studies using X-ray diffraction (XBD) show that all four as-cast alloys belong to the hexagonal P6/mmm space group with similar lattice parameters (for YFe/sub 6/Ge/sub 6/, a=5.12 /spl Aring/ and c=4.07 /spl Aring…
Rare-earth and actinide compoundsIron-based superconductors researchMagnetic Properties of Alloys
Dirk W. Heinz、Brian W. Matthews1994-01-01Protein Engineering Design and Selection
In an attempt to facilitate crystallization, engineered cysteines were used to promote formation of a 'back-to-back' dimer that occurs in different crystal forms of wild-type and mutant T4 lysozymes. The designed double mutant, N68C/A93C, in which the surface residues Asn68 and Ala93 were replaced by cysteines, formed…
Protein Structure and DynamicsEnzyme Structure and FunctionEnzyme Production and Characterization
Tarek M. Salama、Takafumi Shido、Ryuichiro Ohnishi 等 4 位作者1994-01-01Journal of the Chemical Society Chemical Communications
The intrazeolite Aul in NaY zeolite exhibits remarkable catalytic activities in the decomposition of NO to N2(N2O) and O2 at low temperatures; the NO decomposition reaction proceeds through the sequential formation of N2O3 and N2O intermediates on Aul/NaY at 300–673 K.
Catalytic Processes in Materials ScienceCatalysis and Hydrodesulfurization StudiesAdvanced Nanomaterials in Catalysis
Elly Uzunova、D. Klissurski、S Kassabov1994-01-01Journal of Materials Chemistry
Nickel–iron hydroxide carbonates with layered reevesite-like structures have been synthesized by coprecipitation and their evolution to high-dispersity oxides has been studied. NiII–FeIII cation substitution in the octahedral positions of the cationic layers for a wide interval of nickel : iron ratios (0.33–3) is dedu…
Multiferroics and related materialsMagnetic Properties and Synthesis of FerritesLayered Double Hydroxides Synthesis and Applications
Z. Bashir、Alison Tipping、Stephen P. Church1994-01-01Polymer International
Abstract Polyacrylonitrile (PAN) films were made by casting a dimethyl sulphoxide (DMSO) solution. After drying, the films were uniaxially drawn by an essentially solid‐state drawing procedure. Using polarised‐infrared (IR) spectroscopy, the dichroism of the nitrile‐stretching vibration was monitored as a function of…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesFiber-reinforced polymer composites
Kenji Hiraga、Wei Sun、Akiji Yamamoto1994-01-01Materials Transactions JIM
Local atomic arrangements and wide tilings for two types of decagonal quasicrystals, which are formed in alloys with compositions near Al70Ni15Co15, were studied by high-resolution electron microscopy. The decagonal quasicrystals can be interpreted as structures formed with different tilings, so-called rhombic and pen…
Quasicrystal Structures and PropertiesNanocluster Synthesis and ApplicationsMineralogy and Gemology Studies
Jean‐Pierre Fleurial、T. Caillat、Alex Borshchevsky1994-01-01AIP conference proceedings
Based on literature data and experimental findings at the Jet Propulsion Laboratory (JPL), semiconductors with the skutterudite structure TPn3 (where T is a transition metal element such as Co, Rh, Ir, Ni, and Pd, and Pn is a pnicogen element such as P, As, and Sb) possess attractive characteristics and show a good po…
Advanced Thermoelectric Materials and DevicesChalcogenide Semiconductor Thin FilmsSemiconductor materials and interfaces
Dong‐Woo Shin、Hidehiko Tanaka1994-01-01Journal of the American Ceramic Society
Two‐dimensional Al 2 O 3 and SiC woven laminate composites, and oxide and nonoxide monolithic ceramics with 5 to 10 wt% of polycarbosilane binder, were consolidated up to 75% of TD (theoretical density) at 1150°C by the multiple impregnations of a polycarbosilane solution. The processing conditions were optimized with…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesAdditive Manufacturing and 3D Printing Technologies