Mauro Ghedini、Stefania Morrone、Dante Gatteschi 等 4 位作者1991-07-01Chemistry of Materials
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransition metals complexed to ordered mesophases. Synthesis, mesomorphic behavior and EPR investigations on a homologous series of N-(4-alkoxysalicylidene)-4'-alkylanilines complexed to copper(II)Mauro Ghedini, Stefania Morrone, Dante Gatteschi, and Claudia ZanchiniCite thi…
Mesoporous Materials and CatalysisThermal and Kinetic AnalysisAdsorption, diffusion, and thermodynamic properties of materials
Xiongyi Liang、Sonia Torres de Flores、D. E. Ellis 等 5 位作者1991-07-01The Journal of Chemical Physics
Anisotropic materials made from stacked macrocycles have potential applications as organic conductors and nonlinear optical materials. Using self-consistent-field local density theory, we have been exploring the ground and excited state electronic structures of metal substituted tetraazaporphyrins, phthalocyanines, an…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesLuminescence and Fluorescent Materials
S C Klevenhagen1991-07-01Physics in Medicine and Biology
The electron backscatter data derived by Klevenhagen et al. (1982) and Hunt et al. (1988) were found to correlate well and were fitted to an empirical exponential expression valid between 3 and 35 MeV and atomic numbers between 4 and 82. In evaluating the formula, a (Z + 1) term was used at low atomic numbers and Z al…
Nuclear Physics and ApplicationsElectron and X-Ray Spectroscopy TechniquesRadiation Effects and Dosimetry
H. Macskasy、Giuseppe Pal1991-07-01Medical Entomology and Zoology
1. A preliminary survey of plastics . Terms and definitions. Classification of plastics. Nomenclature of plastics. Glossary of plastics. General literature guide. 2. Fundamentals of the theory of combustion . Definition of combustion. Chemical and physico-chemical processes of combustion. The course of combustion. The…
Fire dynamics and safety researchFlame retardant materials and properties
V. C. Farmer、W. J. McHardy、F. Palmieri 等 5 位作者1991-07-01Soil Science Society of America Journal
Abstract Synthetic allophanes were prepared by adding excess CaCO 3 to solutions containing Al(NO 3 ) 3 and Si(OH) 4 (concentrations ≤1.5 m M ) with molar Si/Al starting ratios ranging from 1:8 to 4:1. The systems were incubated at 20 and 80 °C until the concentration of Si(OH) 4 in solution approached stability after…
Concrete and Cement Materials ResearchBuilding materials and conservationClay minerals and soil interactions
Masahiko Sisido、Yoshihiro Ishikawa、Kenjy Itoh 等 4 位作者1991-07-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHelically arranged azobenzene chromophores along a polypeptide chain. 1. Synthesis and circular dichroismMasahiko Sisido, Yoshihiro Ishikawa, Kenjy Itoh, and Shigeo TazukeCite this: Macromolecules 1991, 24, 14, 3993–3998Publication Date (Print):July 1, 1991Publication Histor…
DNA and Nucleic Acid ChemistryGlycosylation and Glycoproteins ResearchSupramolecular Self-Assembly in Materials
L. Zuppiroli、N. Papandreou、R. Kormann1991-07-01Journal of Applied Physics
We present a quantitative analysis of ac electrical conductivity and dielectric constant measurements that were performed on boron carbide samples. This material is crystalline but disordered on the atomic scale because of the existence of a large stoichiometry range from B9C to B4C. The polaronic character of the hop…
Boron and Carbon Nanomaterials ResearchSemiconductor materials and interfacesSolid-state spectroscopy and crystallography
Arunava Chakrabarti、Samit Karmakar1991-07-01Physical review. B, Condensed matter
We present a real-space renormalization-group method for calculating the exact local and average Green's functions for generalized Fibonacci lattices. The fundamental requirement of the present method is that one should be able to split the original lattice into a finite number of sublattices, all of which need not be…
Theoretical and Computational PhysicsQuasicrystal Structures and PropertiesX-ray Diffraction in Crystallography
E. Castaño、J. Maiz、P. A. Flinn 等 4 位作者1991-07-01Applied Physics Letters
In situ experiments have been carried out using a field emission scanning electron microscope (Hitachi S-800) in order to characterize the dynamic behavior of electromigration (EM) voids under high spatial resolution. These experiments have shown how the EM voids move against the electron wind either in passivated or…
Electronic Packaging and Soldering TechnologiesSemiconductor materials and devicesCopper Interconnects and Reliability
Yasuo Kitaoka、Takatomo Sasaki、Sadao Nakai 等 4 位作者1991-07-01Applied Physics Letters
Large single crystals (60×20×8 mm3) of a new nonlinear crystal thienylchalcone (T-17) were grown from acetone by the falling temperature method and the nonlinear optic properties were determined. The effective nonlinear optical coefficient, the angular acceptance (Δθ,Δφ), and the walk-off angle were 7.1 pm/V, 0.053° c…
Photonic and Optical DevicesNonlinear Optical Materials ResearchPhotorefractive and Nonlinear Optics
Klaüs Praefcke、Peer Marquardt、Bernd Kohne 等 6 位作者1991-07-01Molecular crystals and liquid crystals
Results of x-ray measurements on the various columnar mesophases of multi-ethers of the naturally occurring stereoisomers myo- and scyllo-inositol are presented. Depending on the number of alkyl substituents at their inositol cores such derivatives show interesting kinds of molecular organization in their liquid-cryst…
Liquid Crystal Research Advancements
Fernando J. Muzzio、Mahari Tjahjadi、Julio M. Ottino1991-07-01Physical Review Letters
Deformation and breakup of immiscible fluids in deterministic chaotic flows is governed by self-similar distributions of stretching histories and stretching rates and produces populations of droplets of widely distributed sizes. Scaling reveals that distributions of drop sizes collapse into two self-similar families;…
Theoretical and Computational PhysicsFluid Dynamics and Heat TransferPickering emulsions and particle stabilization
MW Tungol、Akbar Montaser1991-07-01Journal of Forensic Sciences
Abstract Infrared (IR) microscopic analysis was performed in tandem with traditional techniques of fiber analysis in case studies in order to determine the feasibility of IR microscopy as a routine technique for fiber analysis. All fibers which were comparable by visual, optical microscopy were also found to be compar…
Textile materials and evaluations
Jean Guézennec1991-07-01Biofouling
In order to protect metallic structures from marine corrosion, cathodic protection using sacrificial anodes or impressed current is widely used. In aerated seawater steel is considered to be protected when a cathodic potential of — 800 mV/SCE (Saturated Calomel Electrode) is applied. However, in many cases, this poten…
Corrosion Behavior and InhibitionMetal Extraction and BioleachingConcrete Corrosion and Durability
I. Choe、R. Ingalls、J. M. Brown 等 5 位作者1991-07-01Physical review. B, Condensed matter
We have measured in situ M\"ossbauer spectra of iron hydride made in a diamond anvil cell at high pressure and room temperature. The spectra show a sudden change at 3.5\ifmmode\pm\else\textpm\fi{}0.5 GPa from a single hyperfine pattern to a superposition of three. The former pattern results from normal \ensuremath{\al…
Advanced Chemical Physics StudiesMetal and Thin Film MechanicsMetallurgical and Alloy Processes
Jerzy Krupka1991-07-01IEEE Transactions on Microwave Theory and Techniques
A method of measuring all the complex permeability tensor components of microwave ferrites using a single cylindrical ferrite sample is described. Two dielectric ring resonators having the same height and internal diameter but different external diameters, operating on HE/sub 111//sup +or-/ and H/sub 011/ modes respec…
Magnetic Properties and Synthesis of FerritesElectromagnetic wave absorption materialsMicrowave and Dielectric Measurement Techniques
D. W. J. Cruickshank、John R. Helliwell、Keith Moffat1991-07-01Acta Crystallographica Section A Foundations of Crystallography
An analysis is presented of the angular distribution of reflections in Laue diffraction, with particular application to the spatial overlap problem in synchrotron macromolecular crystallography. Spatial overlaps of spots on the detector occur when the angular separations of adjacent diffracted beams are very small. Th…
Nuclear Physics and ApplicationsX-ray Diffraction in CrystallographyCrystallography and Radiation Phenomena
Theodore A. Annan、Dennis G. Tuck、Muhammad Salman Khan 等 4 位作者1991-07-01Organometallics
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect electrochemical synthesis of X2InCH2X compounds (X = Br, I) and a study of their coordination chemistryTheodore A. Annan, Dennis G. Tuck, Masood A. Khan, and Clovis PeppeCite this: Organometallics 1991, 10, 7, 2159–2166Publication Date (Print):July 1, 1991Publication…
Corrosion Behavior and InhibitionAdvanced battery technologies researchOrganic and Molecular Conductors Research
Takashi Uchino、Matae Iwasaki、Tetsuo Sakka 等 4 位作者1991-07-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb initio molecular orbital calculations on the electronic structure of sodium silicate glassesTakashi Uchino, Matae Iwasaki, Tetsuo Sakka, and Yukio OgataCite this: J. Phys. Chem. 1991, 95, 14, 5455–5462Publication Date (Print):July 1, 1991Publication History Published onli…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid-state spectroscopy and crystallography
Anne C. Dillon、Prashant Kumar Gupta、M. B. Robinson 等 5 位作者1991-07-01Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
Fourier transform infrared (FTIR) transmission spectroscopy was used to monitor the decomposition of NH3 and ND3 on silicon surfaces. Experiments were performed in situ in an ultrahigh vacuum (UHV) chamber using high surface area porous silicon samples. The FTIR spectra revealed that NH3 (ND3) dissociatively adsorbs a…
Advanced Photocatalysis TechniquesCatalytic Processes in Materials ScienceGas Sensing Nanomaterials and Sensors