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Nonplanar porphyrins and their significance in proteins

John A. Shelnutt、Xing-Zhi Song、Jianguo Ma 等 7 位作者1998-01-01OpenAlex

Nonplanar distortions of tetrapyrroles are prevalent in the hemes of hemoproteins, the pigments of photosynthetic proteins, and cofactor F430 of methylreductase. The nonplanarity of these porphyrin cofactors is currently believed to influence factors in the biological activity of the proteins, in part, because the por…

Photosynthetic Processes and MechanismsPorphyrin Metabolism and DisordersPorphyrin and Phthalocyanine Chemistry

Studies of the water-gas-shift reaction on ceria-supported Pt, Pd, and Rh: Implications for oxygen-storage properties

T. Bunluesin、Raymond J. Gorte、George W. Graham1998-01-01OpenAlex

Steady-state, water-gas-shift kinetics were measured on model, ceria-supported, Pd, Pt, and Rh catalysts and compared to rates obtained on alumina-supported catalysts. When ceria was calcined at low temperatures prior to addition of the precious metal, the specific rates were found to be identical for each of the meta…

Catalysis and Hydrodesulfurization StudiesCatalytic Processes in Materials ScienceElectrocatalysts for Energy Conversion

Fundamentals of Functionally Graded Materials

Daniel Delfosse1998-01-01OpenAlex

Todayto explain or understand.Ball is particularly good at demonstrating how the details fit into the big picture, and how present-day work relates to sometimes faroff goals.Ultimately,

Material Properties and Applications

Cu2O as a photocatalyst for overall water splitting under visible light irradiation

Masahiko Hara、Takeshi Kondo、Mutsuko Komoda 等 9 位作者1998-01-01OpenAlex

Photocatalytic decomposition of water into H2 and O2 on Cu2O under visible light irradiation is investigated; the photocatalytic water splitting on Cu2O powder proceeds without any noticeable decrease in the activity for more than 1900 h.

Copper-based nanomaterials and applicationsZnO doping and propertiesAdvanced Photocatalysis Techniques

Reconstructing random media

C. L. Y. Yeong、Salvatore Torquato1998-01-01OpenAlex

We formulate a procedure to reconstruct the structure of general random heterogeneous media from limited morphological information by extending the methodology of Rintoul and Torquato [J. Colloid Interface Sci. 186, 467 (1997)] developed for dispersions. The procedure has the advantages that it is simple to implement…

Pickering emulsions and particle stabilizationGroundwater flow and contamination studiesMaterial Dynamics and Properties

Analysis of transport phenomena

William M. Deen1998-01-01OpenAlex

Preface List of Symbols CHAPTER 1. DIFFUSIVE FLUXES AND MATERIAL PROPERTIES 1.1 INTRODUCTION 1.2 BASIC CONSTITUTIVE EQUATIONS 1.3 DIFFUSIVITIES FOR ENERGY, SPECIES, AND MOMENTUM 1.4 MAGNITUDES OF TRANSPORT COEFFICIENTS 1.5 MOLECULAR INTERPRETATION OF TRANSPORT COEFFICIENTS 1.6 LIMITATIONS ON LENGTH AND TIME SCALES Ref…

Scientific Research and DiscoveriesMaterial Properties and Failure MechanismsVehicle emissions and performance

Metal-directed self-assembly of two- and three-dimensional synthetic receptors

Makoto Fujita1998-01-01OpenAlex

This article reviews recent progress in the study of the transition-metal mediated self-assembly of two- and three-dimensional synthetic receptors. Whereas macrocyclization under kinetic control is undoubtedly an unfavorable process, the self-assembly strategy offers quite efficient methods for constructing macrocycle…

Porphyrin and Phthalocyanine ChemistryMolecular Junctions and NanostructuresSupramolecular Chemistry and Complexes

A completely biological tissue-engineered human blood vessel

Nicolas L’Heureux、Stéphanie Pâquet、Raymond Labbé 等 5 位作者1998-01-01OpenAlex

Mechanically challenged tissue-engineered organs, such as blood vessels, traditionally relied on synthetic or modified biological materials for structural support. In this report, we present a novel approach to tissue-engineered blood vessel (TEBV) production that is based exclusively on the use of cultured human cell…

Tissue Engineering and Regenerative MedicineElectrospun Nanofibers in Biomedical ApplicationsConnective tissue disorders research

The Chemistry of Conducting Polythiophenes

Richard D. McCullough1998-01-01OpenAlex

Directing the structure and function of polythiophenes (PTs) can lead to remarkable enhancements in the electronic and photonic properties of the resultant materials, as discussed in this comprehensive review of the chemistry and synthesis of PTs. The Figure illustrates the use of heteroatom-functionalized PTs as chem…

Molecular Sensors and Ion DetectionPorphyrin and Phthalocyanine ChemistryConducting polymers and applications

Bimetallic nanoparticles—novel materials for chemical and physical applications

Naoki Toshima、Tetsu Yonezawa1998-01-01OpenAlex

A new class of materials for catalysis have been intensively investigated, that is, ‘bimetallic nanoparticles’. Extensive studies of non-supported bimetallic nanoparticle dispersions, stabilized by polymers or ligands, started only about 10 years ago. Many preparative procedures have been proposed, and detailed charac…

Nanomaterials for catalytic reactionsGold and Silver Nanoparticles Synthesis and ApplicationsCatalytic Processes in Materials Science

Shape memory materials

Clarence Marvin Wayman、和弘 大塚1998-01-01OpenAlex

1. Introduction K. Otsuka and C. M. Wayman 2. Mechanism of shape memory effect and superelasticity K. Otsuka and C. M. Wayman 3. Ti-Ni shape memory alloys T. Saburi 4. Cu-based shape memory alloys T. Tadaki 5. Ferrous shape memory alloys T. Maki 6. Fabrication of shape memory alloys Y. Suzuki 7.Characteristics of shap…

Shape Memory Alloy Transformations

Surface-enhanced Raman scattering

Alan Campion、Patanjali Kambhampati1998-01-01OpenAlex

We present an introduction to surface-enhanced Raman scattering (SERS) which reviews the basic experimental facts and the essential features of the mechanisms which have been proposed to account for the observations. We then review very recent fundamental developments which include: SERS from single particles and sing…

Nanocluster Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesGold and Silver Nanoparticles Synthesis and Applications

Physical Properties of Carbon Nanotubes

R. Saito、G. Dresselhaus、M. S. Dresselhaus1998-01-01OpenAlex

This is an introductory textbook for graduate students and researchers from various fields of science who wish to learn about carbon nanotubes. The field is still at an early stage, and progress continues at a rapid rate. This book focuses on the basic principles behind the physical properties and gives the background…

Carbon Nanotubes in CompositesAdvanced Physical and Chemical Molecular Interactions

Corrosivity of Kawerau geothermal steam

Keith A. Lichti、Peter T. Wilson、Maria Inman1997-12-31OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)

The Kawerau geothermal field has supplied steam to heat exchangers, turbines and other engineering plants for more than 40 years. The main construction materials are carbon and low alloy steels which show good performance for well casing and well-head equipment, pipelines and energy plant. These materials form passiva…

Corrosion Behavior and Inhibition

Laser activation and metallisation of insulators

Г. А. Шафеев1997-12-31Quantum Electronics

An analysis is made of two-stage metallisation of insulator surfaces. Laser ablation of the surfaces of a number of insulators (activation stage) creates, on the irradiated surface, catalytic centres capable of reducing metals (deposition stage) in special solutions. Autocatalytic deposition spreads a metal over the w…

Semiconductor materials and devicesDiamond and Carbon-based Materials ResearchElectron and X-Ray Spectroscopy Techniques

UHF PD-detection in a power transformer

W.R. Rutgers、Yongyi Fu1997-12-31OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)

The detection of partial discharge (PD) in high voltage insulation is an effective way to determine dielectric faults in the early stages of development. Partial discharge detection in a power transformer was made possible by use of the acoustic detection technique and also by the UHF detection technique. Floating met…

Power Transformer Diagnostics and InsulationHigh voltage insulation and dielectric phenomenaWater Systems and Optimization

The Radiochemistry of Nuclear Power Plants with Light Water Reactors

K.H. Neeb1997-12-31OpenAlex

In this text, radioactivity and the chemical reactions of radionuclons within the different areas of a nuclear power plant are discussed. The text concentrates on commercially-operated light water reactors which currently represent the greatest faction of the world's nuclear power capacity. In 1994, the total electric…

Nuclear and radioactivity studiesRadioactive contamination and transferGraphite, nuclear technology, radiation studies

Physical characterisation of biomass-based pyrolysis liquids: Application of standard fuel oil analyses

Anja Oasmaa、Eero Leppämäki、Päivi Koponen 等 5 位作者1997-12-31OpenAlex

The main purpose of the study was to test the applicability of standard fuel oil methods developed for petroleum-based fuels to pyrolysis liquids. In addition, research on sampling, homogeneity, stability, miscibility and corrosivity was carried out. The standard methods have been tested for several different pyrolysi…

Nuclear and radioactivity studiesCombustion and Detonation ProcessesEngineering and Material Science Research

Temperature Dependence of the Index of Refraction of Fused Silica

J. I. Katz1997-12-31arXiv

In order to explain the positive temperature coefficient of the visible index of refraction of fused silica I develop a simple model which assumes a single ultraviolet resonance. Assuming thermal broadening and using the Kramers- Kronig relations leads to a temperature coefficient in qualitative, but not quantitative,…

Materials Sciencephysics.optics