Nathan A. Jones、E. D. T. Atkins、M. J. Hill 等 5 位作者1997-06-01Macromolecules
Nylons 8 10 and 10 12 have been synthesized and crystallized as chain-folded lamellae from 1,4-butanediol and the results compared with previous studies on Nylons 4 6 and 6 8. In 2 N 2( N + 1) Nylons, the lengths of the two alkane segments are equal and two different hydrogen-bonded sheet schemes are possible: progres…
Polymer crystallization and propertiesSynthesis and properties of polymersMuon and positron interactions and applications
Yukie Saito、Jean‐Luc Putaux、Tsubasa Okano 等 5 位作者1997-06-01Macromolecules
The solid state transformation of chitin β into chitin α under the influence of aqueous HCl of increasing concentration was investigated in the case of highly crystalline β chitin microfibrils isolated from the vestimentiferan tube of Tevnia jerichonana . With acid strength below 6 N, the chitin microfibrils remained…
Nanocomposite Films for Food PackagingAdvanced Cellulose Research StudiesPolysaccharides Composition and Applications
Cyrus Chothia、Tim Hubbard、Steven E. Brenner 等 5 位作者1997-06-01Annual Review of Biophysics and Biomolecular Structure
Analysis of the structures in the Protein Databank, released in June 1996, shows that the number of different protein folds, i.e. the number of different arrangements of major secondary structures and/or chain topologies, is 327. Of these folds, approximately 25% belong to the all-alpha class, 20% belong to the all-be…
Protein Structure and DynamicsRNA and protein synthesis mechanismsEnzyme Structure and Function
V. A. Drits、Lidia G. Dainyak、Fabrice Muller 等 5 位作者1997-06-01Clay Minerals
Abstract Celadonite, glauconite and Fe-illite samples were studied by XRD, EXAFS, IR and Mössbauer spectroscopy. The samples were monomineralic and corresponded to 1 M polytype. In the OH-stretching region of the IR spectra the content of each definite pair of cations bonded to OH groups was determined. The number of…
Crystal Structures and PropertiesClay minerals and soil interactionsIron oxide chemistry and applications
I. D. Brown1997-06-01Acta Crystallographica Section B Structural Science
The restrictions imposed by both chemistry and three-dimensional space on the structures of inorganic crystals can be analysed using the bond-valence model and space-group theory. The bond-valence model is used to construct a bond graph (connectivity table) from which the multiplicities and possible site symmetries of…
Crystal Structures and PropertiesCatalysis and Oxidation ReactionsSolid-state spectroscopy and crystallography
Carsten Bolln、Akira Tsuchida、Holger Frey 等 4 位作者1997-06-01Chemistry of Materials
The homologous series of 8-fold alkyl-substituted octasilsesquioxane has been prepared by hydrosilation of alkenes with octakis(hydridosilsesquioxane) (HSiO 3/2 ) 8 . Ethene, propene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene were employed either in bulk or in toluene solution. The hom…
Epoxy Resin Curing ProcessesSynthesis and properties of polymersSilicone and Siloxane Chemistry
Ángel Marcos‐Fernández、Ángel E. Lozano、Luis A. González 等 4 位作者1997-06-01Macromolecules
The evolution of hydrogen bonding with temperature in three copoly(ether−urea)s with no phase separation has been studied by Fourier transform infrared spectroscopy (FT-IR) in the region of the carbonyl absorption of the urea groups. Assignment of the bands was made by supposing the existence of chains of urea groups…
Crystallography and molecular interactionsCrystallization and Solubility StudiesThermal and Kinetic Analysis
Tae-Kwang Ahn、Mojun Kim、Soonja Choe1997-06-01Macromolecules
Blends of solutions of poly[2,2‘-( m -phenylene)-5,5‘-bibenzimidazole] (PBI) with poly(amic acids) (PAA's) synthesized from BTDA (3,3‘,4,4‘-tetracarboxybenzophenone dianhydride) and DSDA (3,3‘,4,4‘-tetracarboxydiphenyl sulfone dianhydride) with 3,3‘-DDSO 2 (3,3‘-diaminodiphenyl sulfone), 4,4‘-DDSO 2 (4,4‘-diaminodiphe…
Epoxy Resin Curing ProcessesSynthesis and properties of polymersSilicone and Siloxane Chemistry
Er‐Wei Shi、Changtai Xia、Wei‐Zhou Zhong 等 5 位作者1997-06-01Journal of the American Ceramic Society
The crystallographic properties and defects of hydrothermally grown barium titanate crystallites are reported. When a precursor with a Ba:Ti molar ratio of 1.0 was used, cubic barium titanate crystallites were formed. However, when the precursor Ba:Ti molar ratio was 3.0, the product was tetragonal. The defect concent…
Ferroelectric and Piezoelectric MaterialsAdvanced ceramic materials synthesisMicrowave Dielectric Ceramics Synthesis
С. Л. Соболев1997-06-01Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
The effects of local nonequilibrium solute diffusion on a solute concentration field, solute partitioning, interface temperature, and absolute stability limit have been considered. The model incorporates two diffusive speeds, ${\mathrm{V}}_{\mathrm{Db}}$, the bulk-liquid diffusive speed, and ${\mathrm{V}}_{\mathrm{Di}…
Material Dynamics and PropertiesSolidification and crystal growth phenomenaAdvanced Mathematical Modeling in Engineering
Murali Sastry、K. Subramanya Mayya、Virendra Patil 等 5 位作者1997-06-01The Journal of Physical Chemistry B
In this paper, we demonstrate that reasonably ordered multilayer films of silver clusters can be deposited by the Langmuir−Blodgett (LB) technique. The approach consists of electrostatically immobilizing negatively charged carboxylic acid derivatized silver colloidal particles at the air−water interface using positive…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesLipid Membrane Structure and Behavior
Shuichi Matsumura、Kimihiro Mabuchi、Kazunobu Toshima1997-06-01Macromolecular Rapid Communications
Abstract The six‐membered lactide was polymerized using the ring‐opening polymerization with lipase as a catalyst at a temperature between 80 and 130°C in bulk to yield the corresponding polylactide with weight‐average molecular weights of up to 126000. The most preferable conditions with respect to the molecular weig…
biodegradable polymer synthesis and properties
Atsushi Kawamoto、Kazuya Miyagawa、Kazushi Kanoda1997-06-01Physical review. B, Condensed matter
The electronic state of the deuterated salt of the organic system \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$Cu[N(CN${)}_{2}$]Br, has been investigated by dc/ac susceptibility and $^{1}\mathrm{/}^{13}$C NMR measurements. We found that the system is situated in the critical region of the transition between a superconducting…
Physics of Superconductivity and MagnetismMagnetism in coordination complexesOrganic and Molecular Conductors Research
N. Clauer、J. Šrodoń、Juraj Franců 等 4 位作者1997-06-01Clay Minerals
Abstract Fundamental particles of illite-smectite from bentonites were separated into classes by high-speed centrifugation after infinite osmotic swelling of mixed-layer crystals, achieved by Na-exchange and dispersion in distilled water. In samples free of detrital contamination, the thinnest fundamental particles yi…
Geological and Geochemical AnalysisGeology and Paleoclimatology ResearchClay minerals and soil interactions
Sangkee Rhee、Kevin Parris、C. Craig Hyde 等 6 位作者1997-06-01Biochemistry
Three-dimensional structures are reported for a mutant (betaK87T) tryptophan synthase alpha2beta2 complex with either the substrate L-serine (betaK87T-Ser) or product L-tryptophan (betaK87T-Trp) at the active site of the beta-subunit, in which both amino acids form external aldimines with the coenzyme, pyridoxal phosp…
Protein Structure and DynamicsMicrobial Natural Products and BiosynthesisEnzyme Structure and Function
Fuming Yang、J. R. Sambles1997-06-01Journal of Modern Optics
Analytic theory and numerical modelling are presented for the prism coupling of light to long range surface modes supported by a thin absorbing film. If both transverse magnetic and transverse electric modes can be excited, then by comparing theory to angle dependent reflectivity data the optical permittivity and thic…
Photonic and Optical DevicesLiquid Crystal Research AdvancementsOptical Polarization and Ellipsometry
Paul F. Fewster1997-06-01Critical reviews in solid state and materials sciences/CRC critical reviews in solid state and materials sciences
This review covers the recent advances in reciprocal space mapping. The experimental techniques as well as the theoretical and conceptual developments are discussed. The advantages of reciprocal space mapping over the conventional single scan X-ray scattering methods become clear from the examples presented. Extractin…
X-ray Spectroscopy and Fluorescence AnalysisX-ray Diffraction in CrystallographySurface Roughness and Optical Measurements
M. Carroll、Jennifer G. Blank1997-06-01American Mineralogist
Other| June 01, 1997 The solubility of H2 O in phonolitic melts Michael R. Carroll; Michael R. Carroll Bristol University, Department of Geology, Bristol, United Kingdom Search for other works by this author on: GSW Google Scholar Jennifer G. Blank Jennifer G. Blank Carnegie Institution of Washington, United States Se…
Glass properties and applicationsBuilding materials and conservationMineralogy and Gemology Studies
Yutaka Moritomo、Kotaro Higashi、Kei Matsuda 等 4 位作者1997-06-01Physical review. B, Condensed matter
Magnetic and transport properties are investigated for single crystals of layered perovskite cobalt oxides, ${\mathrm{La}}_{2\mathrm{\ensuremath{-}}\mathrm{x}}$${\mathrm{Sr}}_{\mathrm{x}}$${\mathrm{CoO}}_{4}$ (0.4\ensuremath{\leqslant}x\ensuremath{\leqslant}1.0). The effective magnetic moment ${\mathrm{\ensuremath{\mu…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Masanobu Izaki、Takashi Omi1997-06-01Journal of The Electrochemical Society
Transparent zinc oxide (ZnO) films have been grown by galvanostatic cathodic deposition onto conductive glasses from a simple aqueous zinc nitrate electrolyte maintained at 335 K. The as‐deposited ZnO films were characterized with Fourier transform infrared absorption spectroscopy, x‐ray diffraction, scanning electron…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications