Goran Ungar、J. L. Feijoo、Virgil Percec 等 4 位作者1991-02-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid-crystalline polyethers based on conformational isomerism. 16. Hexagonal columnar phase (.PHI.h) in a nondiscotic copolyether based on 1,2-bis(4-hydroxyphenyl)ethane, 1,8-dibromooctane, and 1,12-dibromododecane, and the novel 2-dimensional-3-dimensional .PHI.h-sB trans…
Liquid Crystal Research AdvancementsSurfactants and Colloidal Systems
Bo Xu、Larry Kevan1991-02-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of silver ionic clusters and silver metal particles in zeolite rho studied by electron spin resonance and far-infrared spectroscopiesBo Xu and Larry KevanCite this: J. Phys. Chem. 1991, 95, 3, 1147–1151Publication Date (Print):February 1, 1991Publication History Pu…
Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisNanocluster Synthesis and Applications
Chuan Qin、Alfredo T. N. Pires、Laurence A. Belfiore1991-02-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic investigations of specific interactions in amorphous polymer-polymer blends: poly(vinylphenol) and poly(vinyl methyl ketone)Chuan Qin, Alfredo T. N. Pires, and Laurence A. BelfioreCite this: Macromolecules 1991, 24, 3, 666–670Publication Date (Print):February 1…
Material Dynamics and PropertiesPhotochemistry and Electron Transfer StudiesElectrochemical Analysis and Applications
Ming‐Chia Lai、J.-Y. Kim、Chiao-Yang Cheng 等 6 位作者1991-02-01SAE technical papers on CD-ROM/SAE technical paper series
<div class="htmlview paragraph">The three-dimensional non-reacting flow field inside a typical dual-monolith automotive catalytic converter was simulated using finite difference analysis. The monolithic brick resistance was formulated from the pressure gradient of fully developed laminar duct-flow and corrected…
Catalytic Processes in Materials ScienceAdvanced Numerical Methods in Computational MathematicsLattice Boltzmann Simulation Studies
Paul Baudry、Michel A. Aegerter、D. Deroo 等 4 位作者1991-02-01Journal of The Electrochemical Society
An electrochromic window was built using WO 3 as electrochromic material and V 2 O 5 as counterelectrode. Both were deposited onto ITO‐coated glass panes by vacuum evaporation and were amorphous to x‐ray diffraction. The electrolyte was a lithium‐conducting polymer consisting of a poly(ethylene oxide)‐lithium salt com…
Conducting polymers and applicationsPhotonic Crystals and ApplicationsTransition Metal Oxide Nanomaterials
Achim Müller、Joachim Döring、M. Ishaque Khan 等 4 位作者1991-02-01Angewandte Chemie International Edition in English
A surprisingly low VIV/VV ratio is present in the cluster anion of 1. Its structure (picture right; V black, As shaded, O open circles) may be described as a {AsV12O38} unit with Oh symmetry. It is formed from twelve VO6 octahedra sharing edges, which each also share a face with the central AsO6 octahedron. Two additi…
Metal-Organic Frameworks: Synthesis and ApplicationsCrystal Structures and PropertiesPolyoxometalates: Synthesis and Applications
Holger Lindgreen、H. Jacobsen、Hans J. Jakobsen1991-02-01Clays and Clay Minerals
Abstract The Kimmeridgian-Volgian(-Ryazanian) clay stone is the principal oil source rock in the troughs of the North Sea. Randomly (R0) ordered mixed-layer illite/smectite (I/S) appears to have transformed to R1-(IS) or R3-(ISII) ordered simultaneously with oil generation. The proportion of illite layers in I/S incre…
Geological and Geochemical AnalysisPaleontology and Stratigraphy of FossilsClay minerals and soil interactions
Michael B. Clark、Cindy A. Burkhardt、Joseph A. Gardella1991-02-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface studies of polymer blends. 4. An ESCA, IR, and DSC study of the effect of homopolymer molecular weight on crystallinity and miscibility of poly(iε-caprolactone)/poly(vinyl chloride) homopolymer blendsMichael B. Clark, Cindy A. Burkhardt, and Joseph A. GardellaCite th…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer Science and PVC
Wolfgang A. Herrmann、Carlos C. Romão、Richard W. Fischer 等 5 位作者1991-02-01Angewandte Chemie International Edition in English
The thermal stability of the ethyl, isobutyl, silaneopentyl and phenyl complexes 1–4 is surprising. At room temperature they are colorless, very volatile liquids and solids and are formed in a procedure (equation (a)), which is quite general.
Synthetic Organic Chemistry MethodsCarbon dioxide utilization in catalysisSilicone and Siloxane Chemistry
Haishan Bu、Yanwan Pang、Dandan Song 等 7 位作者1991-02-01Journal of Polymer Science Part B Polymer Physics
Abstract Various approaches to the preparation and verification of single‐molecule single crystals are discussed for polyethylene and poly (oxyethylene). Analytic tools are electron microscopy, electron diffraction, and differential scanning calorimetry. The main difficulty in producing a single‐molecule single crysta…
Polymer crystallization and propertiesAdvanced Polymer Synthesis and CharacterizationMachine Learning in Materials Science
Keum Yoon、Gerard Parkin、Arnold L. Rheingold1991-02-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA reinvestigation of the molecular structures of cis-mer-MoOCl2(PR3)3: do bond-stretch isomers really exist?Keum Yoon, Gerard Parkin, and Arnold L. RheingoldCite this: J. Am. Chem. Soc. 1991, 113, 4, 1437–1438Publication Date (Print):February 1, 1991Publication History Publi…
Metal complexes synthesis and propertiesPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry
Moon‐Hee Sung、Katsuyuki Tanizawa、Hisashi Tanaka 等 9 位作者1991-02-01Journal of Biological Chemistry
The gene encoding aspartate aminotransferase of a thermophilic Bacillus species, YM-2, has been cloned and expressed efficiently in Escherichia coli. The primary structure of the enzyme was deduced from nucleotide sequences of the gene and confirmed mostly by amino acid sequences of tryptic peptides. The gene consists…
Bacterial Genetics and BiotechnologyEnzyme Structure and FunctionAmino Acid Enzymes and Metabolism
Bernard N. Rospendowski、Kim Kelly、C. Roland Wolf 等 4 位作者1991-02-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface-enhanced resonance Raman scattering from cytochromes P-450 adsorbed on citrate-reduced silver solsBernard N. Rospendowski, Kim Kelly, C. Roland Wolf, and W. Ewen SmithCite this: J. Am. Chem. Soc. 1991, 113, 4, 1217–1225Publication Date (Print):February 1, 1991Publica…
Gold and Silver Nanoparticles Synthesis and ApplicationsSpectroscopy and Quantum Chemical StudiesProtein Interaction Studies and Fluorescence Analysis
Laurence J. Shaw、Veit Elser、Christopher L. Henley1991-02-01Physical review. B, Condensed matter
Monte Carlo simulations are performed on the rhombohedral random-tiling model of icosahedral quasicrystals. Long-range order is observed in agreement with a squared-gradient form of the coarse-grained free energy, and the two independent phason elastic constants are determined. Schematic transmission electron microgra…
Solidification and crystal growth phenomenaQuasicrystal Structures and PropertiesMineralogy and Gemology Studies
Kenji Hiraga、Wei Sun、Francis Lincoln1991-02-01Japanese Journal of Applied Physics
We found that the stable decagonal quasicrystal of Al-Cu-Co undergoes a structural change at low temperatures. The Al 65 Cu 15 Co 20 alloy quenched from 800°C shows diffraction patterns with sharp spots placed at nearly perfect decagonal symmetry positions, but by annealing at 550°C the diffraction patterns show a rem…
Microstructure and mechanical propertiesQuasicrystal Structures and PropertiesMineralogy and Gemology Studies
R. Todd、Mariana E. Van Dam、Danilo R. Casimiro 等 5 位作者1991-02-01Proteins Structure Function and Bioinformatics
A metal-binding site consisting of two histidines positioned His-X3-His in an alpha-helix has been engineered into the surface of Saccharomyces cerevisiae iso-1-cytochrome c. The synthetic metal-binding cytochrome c retains its biological activity in vivo. Its ability to bind chelated Cu(II) has been characterized by…
Protein Structure and DynamicsBacterial Genetics and BiotechnologyEnzyme Structure and Function
Matthew A. Marcus、W. Flood、Michael Stiegerwald 等 5 位作者1991-02-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of capped cadmium selenide clusters by EXAFSMatthew A. Marcus, W. Flood, Michael Stiegerwald, Louis Brus, and Moungi BawendiCite this: J. Phys. Chem. 1991, 95, 4, 1572–1576Publication Date (Print):February 1, 1991Publication History Published online1 May 2002Publis…
Catalytic Processes in Materials ScienceQuantum Dots Synthesis And PropertiesMachine Learning in Materials Science
Hideo Takezoe、Ji Lee、A. D. L. Chandani 等 8 位作者1991-02-01Ferroelectrics
Antiferroelectric phases of MHPOBC were studied by means of thermal analysis, electrooptic measurements and conoscopy. It was found that the phase transitions are seriously influenced by the optical purity of the material. Subphases in the transition region of SmA (paraelectric) -SmC (ferroelectric)-SmCA(antiferroelec…
Liquid Crystal Research AdvancementsSolid-state spectroscopy and crystallographyMolecular spectroscopy and chirality
Makoto Ogawa、Toshinobu Hashizume、Kazuyuki Kuroda 等 4 位作者1991-02-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntercalation of 2,2'-bipyridine and complex formation in the interlayer space of montmorillonite by solid-solid reactionsMakoto Ogawa, Toshinobu Hashizume, Kazuyuki Kuroda, and Chuzo KatoCite this: Inorg. Chem. 1991, 30, 3, 584–585Publication Date (Print):February 1, 1991Pu…
Clay minerals and soil interactionsLayered Double Hydroxides Synthesis and ApplicationsChemical Synthesis and Characterization
Anne Robert、Bernard Loock、Michel Momenteau 等 4 位作者1991-02-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalase modeling with metalloporphyrin complexes having an oxygen ligand in a proximal position. Comparison with complexes containing a proximal nitrogenAnne Robert, Bernard Loock, Michel Momenteau, and Bernard MeunierCite this: Inorg. Chem. 1991, 30, 4, 706–711Publication…
Porphyrin and Phthalocyanine ChemistryEnzyme-mediated dye degradationElectrochemical Analysis and Applications