Christopher J. H. Porter、S. Moein Moghimi、Lisbeth Illum 等 4 位作者1992-06-22FEBS Letters
Small colloidal particulates (150 nm and below, in diameter) can be redirected specifically to the rabbit bone marrow following intravenous administration by coating their surface with the block co-polymer poloxamer-407, a non-ionic surfactant. The coated colloids are sequestered by the sinusoidal endothelial cells of…
Nanoparticle-Based Drug DeliveryRNA Interference and Gene DeliveryDendrimers and Hyperbranched Polymers
J. Ruan、Koji Kobashi、W. J. Choyke1992-06-22Applied Physics Letters
Cathodoluminescence spectra of undoped and boron-doped diamond films are reported and are compared with each other. The dominant spectra feature of these samples is the broad luminescence bands centered around 2.83 and 2.32 eV in undoped and relatively heavily doped samples, respectively. Our result indicates that the…
High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchAdvanced Fiber Laser Technologies
Paul D. Bartlett、R. H. Ottewill、P. N. Pusey1992-06-22OpenAlex
Binary mixtures of suspended hard-sphere colloidal particles, radius ratio ${\mathit{R}}_{\mathit{B}}$/${\mathit{R}}_{\mathit{A}}$=0.58, were observed to undergo entropically driven freezing transitions into both the ${\mathit{AB}}_{2}$ and the ${\mathit{AB}}_{13}$ superlattice structures at different relative proport…
Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesPickering emulsions and particle stabilization
Deng‐Ke Yang、L.-C. Chien、J. W. Doane1992-06-22OpenAlex
A new dispersion involving a polymer in low concentration with a cholesteric liquid crystal is reported. Two types of light modulators from these materials are described as a normal mode shutter which is opaque (light scattering) in the field-OFF state and transparent in the field-ON state and a reverse-mode shutter w…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsSemiconductor Lasers and Optical Devices
Johan van Tol、J.H. van der Waals1992-06-20Molecular Physics
The Zeeman tensor g and the 51V hyperfine tensor A of the metastable spin triplet state of the VO3- 4 ion are determined by optically detected magnetic resonance experiments. The experimental values of the elements of these tensors are compared with theoretical predictions made with the aid of perturbation theory. The…
Luminescence Properties of Advanced MaterialsTransition Metal Oxide NanomaterialsCatalysis and Oxidation Reactions
Johan van Tol、J.A. Van Hulst、J.H. van der Waals1992-06-20Molecular Physics
The electronic structure of the lowest excited triplet state of the vanadate ion is investigated by determining the polarization of the emission from the individual spin sublevels with optically detected magnetic resonance techniques in zero field at 1·3 K. In addition, the polarization of the total emission is determ…
Luminescence Properties of Advanced MaterialsTransition Metal Oxide NanomaterialsCatalysis and Oxidation Reactions
R. P. Neuman、Larry P. Walker1992-06-20Biotechnology and Bioengineering
A packed column approach was used in this investigation to determine pore volume and surface area distributions of several celluloses. Specific surface areas for Avicel PH 102, Solka Floc BW 300, and two size fractions of corn cobs that have been pretreated to remove lignin and hemicellulose were measured using this t…
Microfluidic and Capillary Electrophoresis ApplicationsAdvanced Cellulose Research StudiesLignin and Wood Chemistry
Dipakbin Q. Chowdhury、Peter W. Barber、Steven C. Hill1992-06-20Applied Optics
Mie theory and geometrical-optics ray tracing are used to obtain the distribution of electric energy density inside a nonabsorbing micrometer-sized sphere illuminated by a polarized plane wave. The Mie solution shows the multiply reflected geometrical-optics rays inside a sphere having a diameter of ~ 150 free-space w…
Metamaterials and Metasurfaces ApplicationsOrbital Angular Momentum in OpticsQuantum and Classical Electrodynamics
Andrey S. Andrenko、Alexander I. Nosich1992-06-20Microwave and Optical Technology Letters
Abstract Dielectric thin‐film guided mode scattering from a finite‐element periodic grating of circular wires or circularly curved metal strips is considered. An accurate solution method is developed and results of computations for the H case are given. © 1992 John Wiley & Sons, Inc.
Electromagnetic Scattering and AnalysisAdvanced Antenna and Metasurface TechnologiesOptical Coatings and Gratings
Dae‐Young Jeon、J. Kim、M. C. Gallagher 等 4 位作者1992-06-19Science
Scanning tunneling microscopy (STM) and point-probe electrical conductivity measurements of electrochemically protonated films of the emeraldine-base form of the conducting polymer, polyaniline are reported. The conductivity varies spatially, dependent on the size (L(M) \m=~\ 200 to 300 angstroms) of granular metallic…
Organic Electronics and PhotovoltaicsElectrochemical sensors and biosensorsConducting polymers and applications
Robert McCarthy1992-06-18OpenAlex
Rain and water Snow Steam Smoke Fire Chemical effects Wire flying and levitation Weapons Non-pyrotechnic projectiles Pyrotechnics Fireworks Special effects and stunts The Gleason Years The Fisher King Appendix Glossary.
Engineering and Material Science Research
Adam R. Brown、Donal D. C. Bradley、J. H. Burroughes 等 8 位作者1992-06-18OpenAlex
Conjugated polymers offer, in principle, the combination of polymer processibility together with interesting electronic properties. The feasibility of controlling materials to give structures with well-defined properties has provided an important focus for the experimental work. A decade or so since the first work on…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsMolecular Junctions and Nanostructures
Tong‐Yi Zhang、J. E. Hack1992-06-16physica status solidi (a)
The elastic softening of grain boundaries is evaluated from the starting point of grain boundary energy. Several examples are given to illustrate the relationship between boundary energy and the extent of softening. In general, a high grain boundary energy is associated with a large excess atomic volume in the boundar…
Microstructure and mechanical propertiesMetal and Thin Film MechanicsAluminum Alloys Composites Properties
D. Osmola、Paul Nolan、U. Erb 等 5 位作者1992-06-16physica status solidi (a)
The microstructural evolution during grain growth at large driving forces of an ultrafine-grained Ni–1.2wt%P solid solution (starting grain size of 7nm) is evaluated for the temperature range 473 to 873 K. It is shown that the material is thermally stable as a nanocrystalline structure up to 623 K. At higher annealing…
Microstructure and mechanical propertiesMetallic Glasses and Amorphous AlloysForce Microscopy Techniques and Applications
Bomin Zhang、W.A. Soffa1992-06-16physica status solidi (a)
Transmission electron microscopy techniques are used to characterize the development of the polytwinned microstructures during Al → Ll0 ordering in FePd and FePt alloys. Also, Lorentz microscopy methods are used to image the magnetic domain structures which are associated with these magnetically modulated twin assem…
Magnetic properties of thin filmsMagnetic Properties and ApplicationsMagnetic Properties of Alloys
U.F. Kocks、Shuh Rong Chen1992-06-16physica status solidi (a)
The effects of temperature and strain rate on dislocation glide at constant structure in nickel and nickel alloys are summarized in terms of their dependence on structure, making expanded use of a diagram introduced by Haasen. New results on the temperature and strain-rate dependence of the rate of strain hardening in…
Microstructure and mechanical propertiesMicrostructure and Mechanical Properties of SteelsHigh-Velocity Impact and Material Behavior
R. Bormann、Klaus Zöltzer1992-06-16physica status solidi (a)
The formation of metastable phases in non-equilibrium processing techniques is still not understood quantitatively. This is mainly a result of the lack of detailed information on kinetic constraints and the thermodynamics of the systems investigated. In this paper a thermodynamic approach for the interpretation of met…
Material Dynamics and PropertiesMetallic Glasses and Amorphous AlloysChemical Thermodynamics and Molecular Structure
G. Palumbo、K.T. Aust、U. Erb 等 6 位作者1992-06-16physica status solidi (a)
The influence of annealing twin density on CSL distributions in f.c.c. materials is discussed. Geometric considerations are presented which show that as a consequence of both energetic and crystallographic constraints associated with twinning, a CSL distribution consisting entirely of low-Σ boundaries is attainable. C…
Microstructure and mechanical propertiesCorrosion Behavior and InhibitionMetal and Thin Film Mechanics
Friedrich Krüger、W. J. McGill1992-06-15Journal of Applied Polymer Science
Abstract During the vulcanization of cis ‐1,4‐polyisoprene (IR) with thiruam‐related curing systems, dimethyldithiocarbamic acid (DMDCA) is formed as a byproduct, in the formation of either pendent groups or crosslinks. DMDCA is unstable, and decomposes instantly to Me 2 NH and CS 2 in the absence of ZnO. The facile r…
Epoxy Resin Curing ProcessesSynthesis and properties of polymersSilicone and Siloxane Chemistry
Allen G. Hunt1992-06-15Journal of Physics Condensed Matter
For pt.I see ibid., vol.3, p.7831 (1991). A recent theory of transport in ionic conducting glasses treats dielectric relaxation in a pair approximation at high frequencies, an augmented pair approximation at intermediate frequencies, and a cluster theory at low frequencies (below the alpha -peak in the imaginary part…
Material Dynamics and PropertiesIonic liquids properties and applicationsGlass properties and applications