David G. Whitten、Liaohai Chen、H. Cristina Geiger 等 5 位作者1998-11-13The Journal of Physical Chemistry B
This feature article presents an overview of a study of several different aromatic-functionalized amphiphiles fatty acid and phospholipid derivatives. These amphiphiles form organized assemblies when the fatty acids are spread as monolayers at the air−water interface or when the phospholipids are dispersed in aqueous…
Supramolecular Self-Assembly in MaterialsSurfactants and Colloidal SystemsPorphyrin and Phthalocyanine Chemistry
Sharon J. Cooper、E. D. T. Atkins、Mary J. Hill1998-11-13Macromolecules
The structural changes induced as a function of temperature in lamellar crystals of monodisperse oligoamides of nylon 6 and nylon 6 6 have been studied using differential scanning calorimetry, X-ray diffraction and electron diffraction. Three different types of solid-state transformations, differing in their mechanism…
Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesPolymer crystallization and properties
Tania Weyland、Karine Costuas、A. Mari 等 5 位作者1998-11-13Organometallics
The bi- and trinuclear iron(III) complexes [1,3-{Cp*(dppe)Fe(C⋮C−)} 2 (C 6 H 4 )][PF 6 ] 2 ( 2 2+ ) and [1,3,5-{Cp*(dppe)Fe(C⋮C−)} 3 (C 6 H 3 )] [PF 6 ] ( 3 3+ ) were prepared by oxidation of [1,3-{Cp*(dppe)Fe(C⋮C−)} 2 (C 6 H 4 )] or [1,3,5-{Cp*(dppe)Fe(C⋮C−)} 3 (C 6 H 3 )] with 2 or 3 equiv of [(C 5 H 5 ) 2 Fe][PF 6…
Metal complexes synthesis and propertiesMetal-Catalyzed Oxygenation MechanismsMagnetism in coordination complexes
Jayasimha Rao、Grzegorz Bujacz、A. Wlodawer1998-11-13FEBS Letters
The crystal structure of rabbit muscle creatine kinase, solved at 2.35 A resolution by X-ray diffraction methods, clearly identified the active site with bound sulfates surrounded by a constellation of arginine residues. The putative binding site of creatine, which is occupied by a sulfate group in this analysis, has…
Enzyme Structure and FunctionBiochemical and Molecular ResearchMuscle metabolism and nutrition
Emanuele Bellacchio、Rosaria Lauceri、Sergio Gurrieri 等 6 位作者1998-11-13Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTTemplate-Imprinted Chiral Porphyrin AggregatesEmanuele Bellacchio, Rosaria Lauceri, Sergio Gurrieri, Luigi Monsù Scolaro, Andrea Romeo, and Roberto PurrelloView Author Information Dipartimento di Scienze Chimiche Università di Catania, Viale Andrea Doria 6 95125 Catani…
Molecular Sensors and Ion DetectionNeonatal Health and BiochemistryPorphyrin and Phthalocyanine Chemistry
Toshihiro Ishikawa、Shinji Kajii、Kenji Matsunaga 等 6 位作者1998-11-13Science
A sintered silicon carbide fiber-bonded ceramic, which consists of a highly ordered, close-packed structure of very fine hexagonal columnar fibers with a thin interfacial carbon layer between fibers, was synthesized by hot-pressing plied sheets of an amorphous silicon-aluminum-carbon-oxygen fiber prepared from an orga…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesSilicon Carbide Semiconductor Technologies
A. Bergara、J. M. Pitarke、P. M. Echenique1998-11-13arXiv
The electronic response of a two-dimensional (2D) electron system represents a key quantity in discussing one-electron properties of electrons in semiconductor heterojunctions, on the surface of liquid helium and in copper-oxide planes of high-temperature superconductors. We here report an evaluation of the wave-vecto…
Materials Science
M. L. Nguyen、S. N. Coppersmith1998-11-13arXiv
We attempt to describe the stress distributions of granular packings using lattice-based layer-by-layer stochastic models that satisfy the constraints of force and torque balance and non-tensile forces at each site. The inherent asymmetry in the layer-by-layer approach appears to lead to an asymmetric force distributi…
Soft Condensed MatterMaterials Science
J. Auer、E. Krotscheck1998-11-13arXiv
We describe a rapidly converging algorithm for solving the Kohn--Sham equations and equations of similar structure that appear frequently in calculations of the structure of inhomogeneous electronic many--body systems. The algorithm has its roots the Hohenberg-Kohn theorem and solves directly for the electron density;…
Materials Science
T. B. Mitchell、J. J. Bollinger、D. H. E. Dubin 等 6 位作者1998-11-13Science
Laser-cooled 9Be+ ions confined in two-dimensionally extended lattice planes were directly observed, and the images were used to characterize the structural phases of the ions. Five different stable crystalline phases were observed, and the energetically favored structure could be sensitively tuned by changing the are…
Material Dynamics and PropertiesLaser-induced spectroscopy and plasmaHigh-pressure geophysics and materials
Shuji Sakohara、Masahiro Ishida、Marc A. Anderson1998-11-13OpenAlex
Luminescence properties of nanosized zinc oxide (ZnO) colloids greatly depend on their surface properties. These surface properties in turn are largely determined by the method of preparation. The procedure for producing ZnO colloids consists of two major steps: (1) preparing the precursor by reacting zinc acetate wit…
ZnO doping and propertiesLuminescence Properties of Advanced MaterialsQuantum Dots Synthesis And Properties
Seong Su Kim、Wenzhong Zhang、Thomas J. Pinnavaia1998-11-13OpenAlex
A family of mesoporous molecular sieves (denoted MSU-G) with vesiclelike hierarchical structures and unprecedented thermal (1000 degreesC) and hydrothermal stabilities (more than 150 hours at 100 degreesC) associated with high SiO4 cross-linking was prepared through a supramolecular assembly pathway that relies on hyd…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisPorphyrin and Phthalocyanine Chemistry
Benjamín Frydman、Claudio O. Fernández、Emanuel Vogel1998-11-12The Journal of Organic Chemistry
The tautomeric exchange of the inner hydrogens of free base alkylporphycenes was examined with the help of 13 C-CPMAS and 15 N-CPMAS NMR recorded at variable temperatures. The porphycenes used were octaethylporphycene 2, 2,7,12,17-tetrapropylporphycene 3, and 9,10,19,20-tetrapropylporphycene 4 . The CPMAS spectra reve…
Molecular spectroscopy and chiralityPorphyrin and Phthalocyanine ChemistryAdvanced NMR Techniques and Applications
Pilar Hernández‐Muñoz、Ramón Catalá、Rubén J. Hernández 等 4 位作者1998-11-12Journal of Agricultural and Food Chemistry
The permeation of five volatile organic compounds found in Iberian ham aroma ( n -hexanal, n -hexanol, n -decane, ethyl caproate, and d -limonene) through films of ultra-low-density polyethylene (ULDPE) and two metallocene copolymers was evaluated at 23 °C. Values of the diffusion, permeability, and solubility coeffic…
Nanocomposite Films for Food Packagingbiodegradable polymer synthesis and propertiesMaterial Properties and Processing
Thomas P. Moffat1998-11-12The Journal of Physical Chemistry B
The influence of chloride adsorption and lead upd on the step dynamics of Cu(100) has been examined in acid perchlorate solution. A c (2 × 2) Cl adlayer is formed upon immersion of a Cu(100) electrode leading to step faceting in the 〈100〉 direction. At more negative potentials an order−disorder transformation occurs l…
Nanoporous metals and alloysElectrodeposition and Electroless CoatingsCopper-based nanomaterials and applications
Max Lombardi1998-11-12OpenAlex
Principles of Radiation Physics Rationale Brief History of Radiation Science Matter and Energy Atomic Structure and Radioactivity Particle Interactions Gamma Ray Interactions Gamma Ray Interactions with Lead and Water Units of Radiation Exposure and Dose Rationale Basic Concepts Other Concepts Specific Gamma Constant…
Radiation Dose and ImagingScience, Research, and MedicineGraphite, nuclear technology, radiation studies
David K. Cinader、Wesley R. Burghardt1998-11-12Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTMixed Orientation State Induced by Expansion Flow of a Thermotropic Liquid-Crystalline PolymerDavid K. Cinader and Wesley R. BurghardtView Author Information Department of Chemical Engineering, Northwestern University, Evanston, Ill…
Nonlinear Dynamics and Pattern FormationLiquid Crystal Research Advancements
Steven R. Presnell、Girish S. Patil、Cameron Mura 等 9 位作者1998-11-12Biochemistry
Novel aryl derivatives of benzamidine were synthesized and tested for their inhibitory potency against bovine trypsin, rat skin tryptase, human recombinant granzyme A, human thrombin, and human plasma kallikrein. All compounds show competitive inhibition against these proteases with Ki values in the micromolar range.…
Enzyme Structure and FunctionBiochemical and Molecular ResearchAmino Acid Enzymes and Metabolism
Vijay R. Mhetar、Lynden A. Archer1998-11-12Macromolecules
The influences of various physical and chemical characteristics of solid substrates on apparent slip violations in entangled polybutadienes are investigated in plane-Couette shear flow. Slip measurements are reported for a range of substrates: (i) clean silica glass, (ii) uncleaned silica glass, (iii) fluorocarbon-coa…
Rheology and Fluid Dynamics StudiesMaterial Dynamics and PropertiesTheoretical and Computational Physics
Homayoun Nozary、Claude Piguet、Paul Tissot 等 7 位作者1998-11-12Journal of the American Chemical Society
A new synthetic strategy has been developed to introduce bent and rigid tridentate 2,6-bis(benzimidazol-2‘-yl)pyridine cores into rodlike ligands L 11 - 17 . The crystal structure of the nonmesogenic ligand L 13 (C 39 H 37 N 5 O 4, triclinic, P 1̄, Z = 2) shows the expected trans − trans conformation of the tridentate…
Lanthanide and Transition Metal ComplexesMolecular Sensors and Ion DetectionMagnetism in coordination complexes