Dimitris I. Collias、Donald G. Baird1995-07-01Polymer Engineering and Science
Abstract In the first part of this series of papers, the tensile properties of microcellular foams of polystyrene (PS), styrene‐acrylonitrile copolymer (SAN), and polycarbonate (PC) were reported. In this part, the impact properties of unnotched, sharply and bluntly notched samples of microcellularly foamed PS and SAN…
biodegradable polymer synthesis and propertiesCellular and Composite StructuresPolymer Foaming and Composites
P. Schiffman、Hubert Staudigel1995-07-01Journal of Metamorphic Geology
Abstract The hydrothermal metamorphism of a sequence of Pliocene‐aged seamount extrusive and volcanoclastic rocks on La Palma includes a relatively complete low‐ P‐T facies series encompassing the zeolite, prehnite‐pumpellyite, and greenschist facies. The observed mineral zonations imply metamorphic gradients of 200–3…
Geological and Geochemical AnalysisClay minerals and soil interactionsGeological and Geophysical Studies Worldwide
Nancy E. Mukundan、Gábor Pethö、Dabney W. Dixon 等 4 位作者1995-07-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDNA-tentacle porphyrin interactions: AT over GC selectivity exhibited by an outside binding self-stacking porphyrinNancy E. Mukundan, Gabor Petho, Dabney W. Dixon, and Luigi G. MarzilliCite this: Inorg. Chem. 1995, 34, 14, 3677–3687Publication Date (Print):July 1, 1995Public…
Advanced biosensing and bioanalysis techniquesDNA and Nucleic Acid ChemistryPorphyrin and Phthalocyanine Chemistry
David A. Jaffray、Jerry Battista、Aaron Fenster 等 4 位作者1995-07-01Medical Physics
The subject contrast of bony anatomy in megavoltage medical radiographs is very low, making detection of bony landmarks difficult if additional noise sources are introduced into the images. One source of noise, which is inherent to the x-ray detection process, is x-ray energy absorption noise. X-ray energy absorption…
Radiation Dose and ImagingRadiation Shielding Materials AnalysisAdvanced X-ray and CT Imaging
Irene Yarovsky、Marie‐Isabel Aguilar、Milton T. W. Hearn1995-07-01Analytical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of the Chain Length and Surface Density on the Conformation and Mobility of n-Alkyl Ligands Chemically Immobilized onto a Silica SurfaceIrene. Yarovsky, Marie-Isabel. Aguilar, and Milton T. W. HearnCite this: Anal. Chem. 1995, 67, 13, 2145–2153Publication Date (Pri…
Mesoporous Materials and CatalysisAnalytical Chemistry and ChromatographyMolecular Junctions and Nanostructures
Yoshiharu Doi1995-07-01Macromolecular Symposia
Abstract Poly(( R )‐3‐hydroxybutyrate), P(3HB), is produced by Alcaligenes eutrophus from fructose or butyric acid. The kinetics and mechanism of P(3HB) biosynthesis are presented. Four types of copolymers, poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate), poly (3‐hydroxybutyrate‐ co ‐3‐hydroxypropionate), poly (3‐hydro…
Enzyme Catalysis and Immobilizationbiodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysis
Masaki Yasuoka、Kiyoshi Hirao、Manuel E. Brito 等 4 位作者1995-07-01Journal of the American Ceramic Society
Control of microstructure in the Al 2 O 3 /LaAl 11 O 18 system was performed. Elongated alumina grains were formed by doping with small addition of silica, and 20 vol% lanthana‐ luminate was formed in situ by the reaction of LaAlO 3 ‐ A1 2 O 3 in an alumina matrix. Strengths of over 600 MPa and a high fracture toughne…
Advanced ceramic materials synthesisMicrowave Dielectric Ceramics SynthesisNuclear materials and radiation effects
V. Srikant、Valter Sergo、David R. Clarke1995-07-01Journal of the American Ceramic Society
Epitaxial thin films of Al‐doped zinc oxide have been grown on sapphire substrates by pulsed laser ablation. The effect of substrate temperature, background pressure of oxygen, and substrate orientation (A, M, R, C) on the orientation relationships between ZnO and sapphire have been evaluated using on‐ and off‐axis X‐…
ZnO doping and propertiesGaN-based semiconductor devices and materialsGa2O3 and related materials
Nakul C. Maiti、Shyamalava Mazumdar、N. Periasamy1995-07-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamics of Porphyrin Molecules in Micelles. Picosecond Time-Resolved Fluorescence Anisotropy StudiesNakul C. Maiti, Shyamalava Mazumdar, and N. PeriasamyCite this: J. Phys. Chem. 1995, 99, 27, 10708–10715Publication Date (Print):July 1, 1995Publication History Published onl…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesSpectroscopy and Quantum Chemical Studies
Leigh Canham1995-07-01physica status solidi (b)
Abstract The striking photoluminescent properties of porous silicon nanostructures have received intense study since 1990. This literature review focuses on the large number of models proposed to account for efficient light emission. Two distinct luminescence bands in the visible spectral range have received most stud…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Andrea Weitemeyer、H. Kliesch、Dieter Woehrle1995-07-01The Journal of Organic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnsymmetrically Substituted Phthalocyanine Derivatives via a Modified Ring Enlargement Reaction of Unsubstituted SubphthalocyanineA. Weitemeyer, H. Kliesch, and D. WoehrleCite this: J. Org. Chem. 1995, 60, 15, 4900–4904Publication Date (Print):July 1, 1995Publication History…
Porphyrin and Phthalocyanine ChemistryFluorine in Organic ChemistryOrganic Chemistry Cycloaddition Reactions
Robert D. Miller、D. M. Burland、M. Jurich 等 9 位作者1995-07-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDonor-Embedded Nonlinear Optical Side Chain Polyimides Containing No Flexible Tether: Materials of Exceptional Thermal Stability for Electrooptic ApplicationsR. D. Miller, D. M. Burland, M. Jurich, V. Y. Lee, C. R. Moylan, J. I. Thackara, R. J. Twieg, T. Verbiest, and W. Vol…
Photonic and Optical DevicesSemiconductor Lasers and Optical DevicesSynthesis and properties of polymers
Charles A. Lesburg、David W. Christianson1995-07-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray crystallographic studies of engineered hydrogen bond networks in a protein-zinc binding siteCharles A. Lesburg and David W. ChristiansonCite this: J. Am. Chem. Soc. 1995, 117, 26, 6838–6844Publication Date (Print):July 1, 1995Publication History Published online1 May 2…
Protein Structure and DynamicsComputational Drug Discovery MethodsEnzyme Structure and Function
Dougal G. McCulloch、Ed Gerstner、David R. McKenzie 等 5 位作者1995-07-01Physical review. B, Condensed matter
Tetrahedral amorphous carbon (ta-C) is a dense form of amorphous carbon with a structure consisting of a highly tetrahedral bonding network. Approximately 20% of the atoms in ta-C are ${\mathit{sp}}^{2}$ hybridized and the presence of these sites plays an important role in the electrical and optical properties of the…
High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchIon-surface interactions and analysis
W. van Megen1995-07-01Transport Theory and Statistical Physics
Recent experiments on suspensions of particles with steeply repulsive interactions are reviewed. These suspensions show the equilibrium freezing-melting transition and a glass transition similar to those obtained in computer simulations of the hard sphere system. The glass transition is identified, firstly, by the ces…
Material Dynamics and PropertiesTheoretical and Computational PhysicsSpectroscopy and Quantum Chemical Studies
Chi‐Feng Cheng、Zhaohua Luan、Jacek Klinowski1995-07-01Langmuir
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Role of Surfactant Micelles in the Synthesis of the Mesoporous Molecular Sieve MCM-41Chi-Feng Cheng, Zhaohua Luan, and Jacek KlinowskiCite this: Langmuir 1995, 11, 7, 2815–2819Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published in…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisNanopore and Nanochannel Transport Studies
R. Neubecker、Gian‐Luca Oppo、Bernd Thuering 等 4 位作者1995-07-01Physical Review A
The use of liquid-crystal light valves (LCLV's) as nonlinear elements in diffractive optical systems with feedback leads to the formation of a variety of optical patterns. The spectrum of possible spatial instabilities is shown to be even richer when the LCLV's capability for polarization modulation is utilized and in…
Liquid Crystal Research AdvancementsNonlinear Dynamics and Pattern FormationPlant Reproductive Biology
S. V. Nistor、E. Goovaerts、D. Schoemaker1995-07-01Physical review. B, Condensed matter
The self-trapped-electron center in ${\mathrm{PbCl}}_{2}$ crystals, i.e., the ${\mathrm{Pb}}_{2}^{3+}$ molecular ion resulting from the trapping of a conduction electron by a pair of ${\mathrm{Pb}}^{2+}$ lattice cations along the a direction, exhibits in the 10--78 K temperature range a strong temperature dependence i…
Perovskite Materials and ApplicationsSolid-state spectroscopy and crystallographyOptical properties and cooling technologies in crystalline materials
J. Lange1995-07-01Acta Crystallographica Section A Foundations of Crystallography
When the Laue technique is applied to ordinary diffractometer devices and detector systems, problems appear with respect to the Lorentz factor that are unsatisfactorily treated in the literature. A detailed treatment of beam divergence and mosaic spread leads to a derivation of the exact expression for the Lorentz fac…
X-ray Spectroscopy and Fluorescence AnalysisX-ray Diffraction in CrystallographyCrystallography and Radiation Phenomena
Shinobu Hashimoto、Akira Yamaguchi1995-07-01Journal of the American Ceramic Society
Magnesium orthosilicate (forsterite) whiskers were synthesized by an oxidation‐reduction reaction in the present investigation. These whiskers were rectangular parallelepipeds, with long sides in a cross‐sectional view from two to ten times as long as the short sides, and measuring from several micrometers to 200 μm w…
Ferroelectric and Piezoelectric MaterialsAdvanced ceramic materials synthesisElectronic and Structural Properties of Oxides