Matthias Schnabelrauch、Sebastain Vogt、Dieter Klemm 等 5 位作者1992-06-01Die Angewandte Makromolekulare Chemie
Abstract A new procedure was developed for the synthesis of low‐substituted, soluble cellulose formates. In a mixture containing cellulose, formic acid, phosphoric acid and water, cellulose can be dissolved within several hours, and after 24 h cellulose formates with a DS of about 0.6 that are soluble in DMSO could be…
Advanced Cellulose Research StudiesLignin and Wood Chemistry
J. R. Durig、Marti Mamula Bergana、Wayne M. Zunic1992-06-01Journal of Raman Spectroscopy
Abstract The Fourier transform Raman spectrum from 100 to 3300 cm −1 of liquid and polycrystalline pyrazole, magnified image was recorded. The frequencies for several of the fundamentals are significantly different from those obtained from the Raman spectra of solutions. The data are interpreted in detail. The previou…
Nonlinear Optical Materials ResearchSpectroscopy and Quantum Chemical StudiesMolecular spectroscopy and chirality
Roberto L. Moreira、R. P. S. M. Lobo1992-06-01Journal of the Physical Society of Japan
Using Landau-Devonshire's theory for microregions of a material presenting a diffuse ferroelectric phase transition we have obtained the smeared behaviour of its dielectric permittivity. This generalization of the classical phenomenological theory contains the Smolensky-Isupov's behaviour near the dielectric maximum.…
Ferroelectric and Piezoelectric MaterialsMaterial Dynamics and PropertiesComposite Material Mechanics
Abdurrahman Karamancıoğlu、Frank L. Lewis1992-06-01IEEE Transactions on Automatic Control
(A,E,B)-invariant and (E,A,B)-invariant subspaces for the two-dimensional singular Roesser model are investigated. These subspaces are related to the existence of the solutions when the boundary conditions are in these subspaces. Also, the existence of a solution sequence in certain subspaces derived from the invarian…
Nonlinear Waves and SolitonsMyeloproliferative Neoplasms: Diagnosis and TreatmentDendrimers and Hyperbranched Polymers
Anna Tampieri、A. Bellosi1992-06-01Journal of the American Ceramic Society
The presence of TiC or TiN paritcles in an Al 2 O 3 matrix affects the thermal stability of the composites in oxidizing environments. In isothermic oxidation tests at 700°, 800°, 900°, 1000°, and 1100°C for up to 20 h, two different oxidation regimes have been observed at T < 900°C and at 900°C ≤ T ≤ 1100°C. At low…
Advanced ceramic materials synthesisIntermetallics and Advanced Alloy PropertiesAdvanced materials and composites
Karl S. Hagen1992-06-01Angewandte Chemie International Edition in English
An eight-coordinate manganese(II) ion is found in dication 1, the first complex between the [2.2.2]cryptand and a transition metal. The O- and N-donor centers take up positions at the corners of an almost perfect cube. The formation of this extremely rare coordination polyhedron for MnII can be attributed to the high…
Metal-Organic Frameworks: Synthesis and ApplicationsMetal complexes synthesis and propertiesMagnetism in coordination complexes
Giovanni Marletta、F. Iacona、András Tóth1992-06-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTParticle beam-induced reactions versus thermal degradation in PMDA-ODA polyimideGiovanni Marletta, Fabio Iacona, and Andras TothCite this: Macromolecules 1992, 25, 12, 3190–3198Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published iniss…
Electron and X-Ray Spectroscopy TechniquesPolymer Nanocomposite Synthesis and Irradiation
F. H. KOEHLER、Bjoern Schlesinger1992-06-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin crossover, dimerization, and structural dynamics of manganocenes probed by deuterium NHR spectroscopyFrank H. Koehler and Bjoern SchlesingerCite this: Inorg. Chem. 1992, 31, 13, 2853–2859Publication Date (Print):June 1, 1992Publication History Published online1 May 2002…
Magnetism in coordination complexesMolecular Junctions and NanostructuresElectron Spin Resonance Studies
Yasuo Saegusa、Toshiya Koshikawa、Shigeo Nakamura1992-06-01Journal of Polymer Science Part A Polymer Chemistry
Abstract Novel 1,3,4‐oxadiazole‐containing polyazomethines were synthesized by the polycondensation of diamines, 2,5‐bis ( m ‐aminophenyl)‐1,3,4‐oxadiazole (BMAO) and 2,5‐bis ( p ‐aminophenyl)‐1,3,4‐oxadiazole (BPAO), with aromatic dialdehydes, isophthalaldehyde and terephthalaldehyde, in m ‐cresol at 20°C. These poly…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsSynthesis and properties of polymers
Robert C. Reynolds、Mark P. DiStefano、Richard W. Lahann1992-06-01Clays and Clay Minerals
Abstract X-ray diffraction studies of the pore-lining chloritic mineral from the Tuscaloosa Formation disclose a marked pattern of odd-order line broadening for the 001 to the 00,16 reflections. The odd-order peaks are approximately twice as broad as the even orders after correction for instrumental broadening effects…
Clay minerals and soil interactionsIron oxide chemistry and applicationsX-ray Diffraction in Crystallography
Xiankun Du1992-06-01Canadian Mathematical Bulletin
Abstract It is shown that the nth center of a radical ring coincides with that of its adjoint group, from which a result of Jennings is sharpened and a conjecture of his is confirmed.
Chemical Synthesis and ReactionsSynthesis and properties of polymersOrganic Chemistry Cycloaddition Reactions
S. Tougaard、C. Jansson1992-06-01Surface and Interface Analysis
Abstract We investigate the validity of methods for background correction in XPS by comparing determined peak intensity ratios with theory. For Ag, Pt and Au, peaks are considered for which possible errors in the inelastic electron mean free path and in the energy dependence of the analyser response function have mini…
X-ray Spectroscopy and Fluorescence AnalysisIron oxide chemistry and applicationsElectron and X-Ray Spectroscopy Techniques
Jean-Rémi Mossmann、N. Clauer、Nicole Liewig1992-06-01Clay Minerals
Abstract Rhaetian (Upper Triassic) sandy horizons were sampled from the Paris Basin from SW to NE, crosscutting the Rhaetian at different depths from outcrop in the NE to 2700 m in the centre of the basin. The smallest day sub-fractions (<0·2 μ m) from the deepest samples consist mainly of illite and chlorite havin…
Geological and Geochemical AnalysisPaleontology and Stratigraphy of FossilsClay minerals and soil interactions
C. Balagopalakrishna、M.V. Rajasekharan、Simon G. Bott 等 5 位作者1992-06-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, crystal structure, magnetic susceptibility, and single-crystal EPR studies of bis(diazafluorenone)dichlorocopper(II): a novel Cu(NN)2X2 system with an unusual distortionC. Balagopalakrishna, M. V. Rajasekharan, S. Bott, J. L. Atwood, and B. L. RamakrishnaCite this…
Metal complexes synthesis and propertiesMagnetism in coordination complexesElectron Spin Resonance Studies
Walten Owens、N.M. Rodríguez、R.T.K. Baker1992-06-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon filament growth on platinum catalystsW. T. Owens, N. M. Rodriguez, and R. T. K. BakerCite this: J. Phys. Chem. 1992, 96, 12, 5048–5053Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https://pubs.acs.org/d…
Catalytic Processes in Materials ScienceCatalysis and Hydrodesulfurization StudiesCatalysis and Oxidation Reactions
Seth Dunn、George E. Ewing1992-06-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared spectra and structure of acetylene on sodium chloride (100)S. Keith Dunn and George E. EwingCite this: J. Phys. Chem. 1992, 96, 13, 5284–5290Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https://doi.o…
Advanced Chemical Physics StudiesPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies
G. G. Hardwick、Dean W. Blinn、Howell D. Usher1992-06-01The Southwestern Naturalist
Flagstaff, AZ 86011 ABSTRACT-Seventy-eight taxa of diatoms were identified from the epiphytic community of Cla- dophoraglomerata in the Colorado River through Glen and Grand Canyons. Achnanthes affinis, Cocconeis pediculus, Diatoma vulgare, and Rhoicosphenia curvata made up 80% of the diatom epiphyton community within…
Aquatic Ecosystems and Phytoplankton DynamicsFreshwater macroinvertebrate diversity and ecologyDiatoms and Algae Research
F. Iga、Yoshikazu Nishihara1992-06-01Journal of the Physical Society of Japan
To date, CaVO 3- y has been reported and believed to be one of the typical metallic oxides. From our detailed study, however, it has been found that this system shows insulating properties with stoichiometric oxygen content. This insulator phase was obtained by oxidation of as-cast single crystals. The magnetic suscep…
Catalytic Processes in Materials ScienceGas Sensing Nanomaterials and SensorsIndustrial Gas Emission Control
F. Albert Cotton、L.M. Daniels、C.A. Murillo1992-06-01Angewandte Chemie International Edition in English
The long quest for a VV triple bond has finally met with success, as shown by the synthesis of the title compound 1. A short intermetallic distance and high magnetic anisotropy indicate strong interaction between the vanadium centers. R = p-CH3C6H4.
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesVanadium and Halogenation Chemistry
Rafik Karaman、Seungwon Jeon、Örn Almarsson 等 4 位作者1992-06-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSymmetrical and unsymmetrical quadruply aza bridged closely interspaced cofacial bis(5,10,15,20-tetraphenylporphyrins). 3. Interplanar distances, proton NMR chemical shifts, and the catalysis of the electrochemical reduction of oxygenRafik Karaman, Seungwon Jeon, Orn Almarss…
Porphyrin and Phthalocyanine ChemistryElectrochemical Analysis and ApplicationsSurface Chemistry and Catalysis