A. Ramzi、A. Hakiki、J. Bastide 等 4 位作者1997-05-01Macromolecules
We have studied end-linked polystyrene networks containing labeled (deuterated) free chains subjected to an uniaxial deformation using small-angle neutron scattering (SANS). The networks are made by end-linking protonated polystyrene precursor chains of a narrow size distribution. As for statistical networks investiga…
Protein Structure and DynamicsPolymer crystallization and propertiesMaterial Dynamics and Properties
Deepali Agarwal、Kushal Sen、M L Gulrajani1997-05-01Journal of the Society of Dyers and Colourists
The influence of dye reactivity on the exhaustion of reactive dyes on silk has been studied. It was found that if reactivity is reduced by blocking or hydrolysing the reactive groups, exhaustion also decreases. A mechanism by which reactive dyes exhaust onto silk in neutral media is also proposed.
Dyeing and Modifying Textile FibersSilk-based biomaterials and applicationsSilkworms and Sericulture Research
Deborah A. Rathbone、P.J.A. HOLT、Christopher R. Lowe 等 4 位作者1997-05-01Applied and Environmental Microbiology
The structural gene for heroin esterase was cloned from Rhodococcus sp. strain H1 and expressed in Escherichia coli BL21(DE3). The purified enzyme was found to be a tetramer with an M(r) of 137,000 and an apparent K(m) of 0.88 mM for 6-acetylmorphine. The G-x-S-x-G motif was observed in the deduced amino acid sequence…
Enzyme Catalysis and ImmobilizationMicrobial Metabolic Engineering and BioproductionEnzyme Structure and Function
Ken‐ichi Sugiura、Г. В. Пономарев、Satoshi Okubo 等 5 位作者1997-05-01Bulletin of the Chemical Society of Japan
Abstract 5,5′-Ethylenebis(octaethylporphyrin) 1 and its metallocomplexes with various combination of metals (Zn, Cu, and Ni) 2—10 were prepared. On the basis of 1H and 13C NMR as well as MCD spectra, it was concluded that interactions between the two intramolecular porphyrins become attractive when at least one of the…
Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesPorphyrin Metabolism and Disorders
Jacqueline M O'Connell、Euan D. Reavie、John P. Smol1997-05-01Diatom Research
Diatoms epiphytic on Cladophora were examined from 36 sites in the Saint Lawrence River between Salaberry-de-Valleyfield and Ile d'Orleans (Quábec, Canada). A total of 129 diatom taxa were identified from Cladophora in June 1995, and of these, 34 species were present at a relative abundance ≥ 1% at three or more sites…
Aquatic Ecosystems and Phytoplankton DynamicsFreshwater macroinvertebrate diversity and ecologyDiatoms and Algae Research
Harold W. Boone、Justin Bryce、Tamara Lindgren 等 5 位作者1997-05-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTStereoregular Poly(benzoquinone imines) from Methyl-Substituted BenzoquinonesHarold W. Boone, Justin Bryce, Tamara Lindgren, Anne Buyle Padias, and H. K. HallView Author Information C. S. Marvel Laboratories, Department of Chemistry…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsSynthesis and properties of polymers
Lieva Van Langenhove1997-05-01Textile Research Journal
Part I established a theoretical model that was able to predict the stress-strain and torque-strain curves of a yarn. This second part evaluates the model. The influence of fiber and yarn parameters on the predicted values is also discussed. The most critical fiber property is the coefficient of friction.
Textile materials and evaluationsStructural Analysis and Optimization
Hong‐Cheu Lin、Long‐Li Lai、WEI PIN HSIEH 等 4 位作者1997-05-01Liquid Crystals
A successful approach in molecular design through fusing aromatic/heterocyclic rings for broadening the smectic C (SmC) phase and the synthesis of the first heterocyclic liquid crystalline (LC) molecules containing 3,7-disubstituted quinoline with one of the widest SmC phases are reported. Their naphthalene analogues…
Liquid Crystal Research AdvancementsSynthesis and Properties of Aromatic CompoundsPlant Reproductive Biology
F. Gieβelmann、P. Zugenmaier1997-05-01Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
A simple molecular-statistical model of the smectic-A--smectic-C phase transition is proposed. Assuming a bilinear mean-field potential, the macroscopic tilt angle is calculated by Boltzmann statistics as a thermal average of the molecular tilt. The calculation leads to an equation of state for the smectic-C phase whi…
Liquid Crystal Research AdvancementsPlant and animal studiesPhotonic Crystals and Applications
S J Huh、Jung‐Il Jin1997-05-01Macromolecules
Two series of new, wholly aromatic copolyesters were prepared from 6-hydroxy-5-phenyl-2-naphthoic acid (HPNA) or 4‘-hydroxy-3‘-phenyl-biphenyl-4-carboxylic acid (HPBA) and 4-hydroxybenzoic acid (HBA) in varying mole ratios. In addition to these copolyesters, the homopolyesters of 6-hydroxy-5-phenyl-2-naphthoic acid an…
biodegradable polymer synthesis and propertiesChemical Synthesis and ReactionsSynthesis and properties of polymers
Friederike Schmid1997-05-01Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
Langmuir monolayers are modeled as systems of short chains, which are confined to a planar surface at one end, but free to move within the plane. The phase behavior is calculated in a mean field approximation, which combines the self consistent field method with elements of classical density functional theory. It is s…
Material Dynamics and PropertiesForce Microscopy Techniques and ApplicationsAdvanced Thermodynamics and Statistical Mechanics
Nicolas Nadaud、Doh‐Yeon Kim、P. Boch1997-05-01Journal of the American Ceramic Society
The influence of TiO 2 additives on the sintering behavior of In 2 O 3 ceramics has been investigated. TiO 2 increases the densification rate, decreases the grain growth during the intermediate stage of sintering, and hinders the pore/boundary breakaway that can affect the final stage of sintering. For a given grain s…
ZnO doping and propertiesAdvancements in Solid Oxide Fuel CellsGas Sensing Nanomaterials and Sensors
Dirk J. Broer、Johan Lub、G. N. Mol1997-05-01Macromolecular Symposia
Abstract Diffusion enforced photo‐assembling during polymerization of a chiralnematic monomer blend yields a cholesteric network in which the helical pitch gradually changes over the cross‐section of the film. The polarization selective reflection band of cholesterics can be made much wider than those of single pitch…
Liquid Crystal Research AdvancementsAdvanced Polymer Synthesis and CharacterizationPhotochromic and Fluorescence Chemistry
Edward H. Snell、Alberto Cassetta、John R. Helliwell 等 10 位作者1997-05-01Acta Crystallographica Section D Biological Crystallography
The protein apocrustacyanin C(1) has been crystallized by vapour diffusion in both microgravity (the NASA space shuttle USML-2 mission) and on the ground. Rocking width measurements were made on the crystals at the ESRF Swiss-Norwegian beamline using a high-resolution psi-circle diffractometer from the University of K…
Enzyme Structure and FunctionCrystallization and Solubility StudiesPharmacological Effects of Natural Compounds
Lorna J. Gibson、Michael F. Ashby1997-05-01Cambridge University Press eBooks
Introduction and synopsis The word ‘cell’ derives from the Latin cella: a small compartment, an enclosed space. Our interest is in clusters of cells – to the Romans, cellarium, to us (less elegantly) cellular solids. By this we mean an assembly of cells with solid edges or faces, packed together so that they fill spac…
Cellular and Composite StructuresPolymer composites and self-healing
F. A. Kenawy、M. E. Kandil、M. A. Fouad 等 4 位作者1997-05-01SPE Production & Facilities
Summary To handle ever-increasing oily water volumes and to improve water quality discharge, separation equipment should be developed to meet industry demand and match environmental regulations. However, special constraints such as size, simplicity of operation, variable fluids, different operating conditions, and eco…
Surface Modification and SuperhydrophobicityAerosol Filtration and Electrostatic PrecipitationWater Quality Monitoring Technologies
Eckhard Flöter、Bart Hollanders、Theodoor W. De Loos 等 4 位作者1997-05-01Journal of Chemical & Engineering Data
In this paper experimental data on the solid−liquid and solid−solid equilibria in the binary system (docosane + tetracosane) and solid solubility data in the ternary system (heptane + docosane + tetracosane) are presented. For 14 binary mixtures of the two heavy alkanes, DSC measurements were performed to detect the s…
Phase Equilibria and ThermodynamicsAnalytical Chemistry and ChromatographyCrystallization and Solubility Studies
Kane M. O’Donnell、J. M. D. Coey1997-05-01Journal of Applied Physics
A range of exchange-coupled two-phase nanocomposites composed of hard magnetic Sm2Fe17N3 and soft magnetic α-Fe was prepared by mechanical alloying with a view to optimizing the hysteresis loop shape. The main variables were the crystallization conditions, the nitriding treatment, and the chemical additives. A model o…
Magnetic properties of thin filmsMetallic Glasses and Amorphous AlloysMagnetic Properties of Alloys
Akbar Ghaneh-Fard、Pierre J. Carreau、Pierre G. Lafleur1997-05-01International Polymer Processing
Abstract Blown film properties depend on the thermo-mechanical history experienced by molten polymer during biaxial deformation. In this study on-line birefringence measurements along the length of the bubble in film blowing of a linear low density polyethylene (LLDPE) were carried out in order to assess the stress le…
Polymer crystallization and propertiesRheology and Fluid Dynamics StudiesPolymer Foaming and Composites
Hideo Tomioka、Takeshi Matsushita1997-05-01Chemistry Letters
Abstract Irradiation of either o-hydroxphenyldiazomethane or benzofuranone in argon matrix at 10 K generates benzoxetene which is in photoequilibrium with o-quinone methide.
Synthesis and properties of polymersChemistry and Chemical EngineeringSynthesis of Tetrazole Derivatives