Catherine J. Miller、Dermot O’Hare2004-01-01Chemical Communications
A new bis(indenyl)zirconocene bearing a pendant Si-Cl anchor has been grafted onto MCM-41, SBA-15, MCM-48 and a disordered mesoporous silica for the polymerisation of ethylene and propylene, producing polymers with very high molecular weights, low polydispersities and, in the case of polypropylene, higher levels of is…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisSynthetic Organic Chemistry Methods
Hongge Pan、Yongfeng Liu、Mingxia Gao 等 6 位作者2004-01-01Journal of The Electrochemical Society
The effect of partial substitution of Mn for Ni on the structural and electrochemical properties of the hydrogen storage alloys has been investigated systematically. The results of X-ray powder diffraction and Rietveld analyses showed that all alloys consisted of the phase and the phase, and the content of the phase f…
Magnesium Alloys: Properties and ApplicationsHydrogen Storage and MaterialsAmmonia Synthesis and Nitrogen Reduction
Beata Witkowska、Iwona Frydrych2004-01-01Fibres and Textiles in Eastern Europe
Fabric utility parameters most often depend on its mechanical properties. The most important strength parameters include unidirectional tensile strength, tear strength and elasticity properties. In this work we describe in detail the problem of tear strength, appropriate measurement methods and the correlation relatio…
Textile materials and evaluationsErgonomics and Musculoskeletal Disorders
ML Grossbeck、Todd R. Allen、RG Lott 等 4 位作者2004-01-01OpenAlex
Description Fifty-nine peer-reviewed papers provide the latest international research on nuclear materials. Although the primary focus is on pressure vessel steels, including mechanical properties and microstructures, it contains papers on the latest research on fundamentals of radiation effects in materials as well a…
Radiation Shielding Materials Analysis
Takashi Saeki、Takayuki Tsukegi、Hideto Tsuji 等 5 位作者2004-01-01KOBUNSHI RONBUNSHU
二酸化炭素排出の抑制につながるとして期待されている植物由来の高分子であるポリ (L-乳酸) (PLLA) に対して, 新たな循環方法を提案するために, そのモノマー化技術について検討を行った. 優れた加水分解能力を有することが明らかである水熱反応を用いてPLLAを加水分解し, モノマーであるL-乳酸を回収することを目的として, モノマー化に与える影響因子について検討した. その結果, 光学純度が低下することなしに, L-乳酸が高収率で得られる条件は, 反応温度220～230℃, 反応時間20分であることが明らかとなった. このことから, 触媒などの添加剤を要することなく水のみにより, PLLAから容易に高い収率でモノマーが得られる…
biodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysisCollagen: Extraction and Characterization
Dmitrii F. Perepichka、Fred Wudl、Stephen R. Wilson 等 5 位作者2004-01-01Journal of Materials Chemistry
Thorough examination of a previous report on the high solubility of carbon nanotubes in refluxing aniline reveals that the reported optical properties of the “nanotube” solution are due to aniline decomposition products, rather than functionalized nanotubes. No appreciable dissolution of single-wall carbon nanotubes c…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
M. A. M. Piah、Ahmad Darus2004-01-01IEEE Transactions on Power Delivery
The behavior of leakage current and electric field of insulators primarily depends on the environmental stresses. A mathematical analysis based on dimensional analysis technique is applied to develop the correlation of leakage current (LC) and electric field with the physical variables of the environmental stresses. T…
High voltage insulation and dielectric phenomenaSmart Materials for ConstructionElectrical Fault Detection and Protection
Guangtao Li、Tianyu Wang、Andrea Schulz 等 8 位作者2004-01-01Chemical Communications
5,15-Bis[acetylene-4-(ethylenedioxy)thiophene]-10,20-bis(4-carboxyphenyl)porphyrin was synthesized by a Sonogashira coupling and polymerized to fibres; TEM and AFM images show uniform porphyrin wires with a length of several micrometers and a thickness of less than 4 nm.
Organic Electronics and PhotovoltaicsConducting polymers and applicationsPorphyrin and Phthalocyanine Chemistry
Chun Li、Tsukasa Hatano、Masayuki Takeuchi 等 4 位作者2004-01-01Chemical Communications
The use of organogelators to template chiral and achiral polyaniline superstructures via the electrostatic interaction between anionic sulfonated polyaniline and a cationic gelator is described.
Conducting polymers and applicationsSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications
Katherine J. Haxton、David J. Cole‐Hamilton、Russell E. Morris2004-01-01Dalton Transactions
Molecular dynamics modelling has been used to simulate the structures of phopshine-functionalised, silsesquioxane-based dendrimers whose excellent catalytic properties have been previously demonstrated. The effect of changing the chemical composition of the dendrimer branches is simulated. The results indicate that ad…
Dendrimers and Hyperbranched PolymersSynthesis and properties of polymersSilicone and Siloxane Chemistry
Ru‐Pin Pan、Tsong-Ru Tsai、Chao‐Yuan Chen 等 5 位作者2004-01-01Molecular Crystals and Liquid Crystals
The terahertz (THz) refractive indices of a liquid crystal 4′-n-pentyl-4cyanobiphenyl (5CB) in both of the nematic and isotropic phases were determined by terahertz (THz) time-domain spectroscopy for the first time, to our knowledge. We find that the extinction coefficient of 5CB is negligibly small in this frequency…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsPlant Reproductive Biology
Chen Zolkov、David Avnir、Robert Armon2004-01-01Journal of Materials Chemistry
Hybrid sol–gel films were developed for tissue-derived cell growth. Specifically, Buffalo green monkey kidney cells were grown on hydrophobically modified silica sol–gel thin films and on such films in which poly-L-lysine (PLL) was entrapped in order to affect surface positive charge density. Intermediate hydrophobici…
Bone Tissue Engineering Materialsbiodegradable polymer synthesis and propertiesPolymer Surface Interaction Studies
Young Rag、Do-Hyung Park、Yongseon Kim2004-01-01Journal of The Electrochemical Society
We studied the aging characteristics of the plasma display panel (PDP) containing -coated blue phosphors and the thermal characteristics of coated phosphors. The nanoscale coatings on phosphors were obtained by the sol-gel method for an concentration of 2.0 wt %, pH values from 2 to 4, and a solution temperature of 50…
Luminescence Properties of Advanced MaterialsCatalytic Processes in Materials ScienceSemiconductor materials and devices
Hitoshi Shigeoka、Junichiro Otomo、Ching-ju Wen 等 5 位作者2004-01-01Journal of The Electrochemical Society
Proton conductivity measurement and ac impedance analysis of composites were carried out using two different methods to prepare sample powders: mechanical mixing and evaporation to dryness. At temperatures below the superprotonic phase transition temperature of ca. 140°C, the conductivity of the composite prepared by…
Perovskite Materials and ApplicationsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Donato Monti、Veronica Cantonetti、Mariano Venanzi 等 6 位作者2004-01-01Chemical Communications
The functionalisation of a porphyrin derivative with a chiral functionality results in a selective interaction with chiral micellar aggregates.
Supramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine ChemistrySurface Chemistry and Catalysis
Krassimira P. Guerra、Rita Delgado、Luı́s M. P. Lima 等 5 位作者2004-01-01Dalton Transactions
Two N-methylphosphonic acid derivatives of a 14-membered tetraazamacrocycle containing pyridine have been synthesized, H(4)L(1) and H(6)L(2). The protonation constants of these compounds and the stability constants of complexes of both ligands with Ni(2+), Cu(2+) and Zn(2+) were determined by potentiometric methods at…
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
B. Vincent Crist2004-01-01Medical Entomology and Zoology
ORGANIZATION AND DETAILS OF SPECTRAL SETS. Alphabetical Organization of Spectra. Contents of Each Set of Spectra. Philosophy of Data Collection Methods. Peak-Fitting (Curve-Fitting) of High Energy Resolution Spectra. Charge Compensation of Insulating Materials. Abbreviations Used. INSTRUMENT AND ANALYSIS DETAILS USED…
Advancements in Photolithography TechniquesMachine Learning in Materials ScienceElectron and X-Ray Spectroscopy Techniques
Matthew P. Blakeley、Michele Cianci、John R. Helliwell 等 4 位作者2004-01-01Chemical Society Reviews
Synchrotron radiation (SR) techniques are continuously pushing the frontiers of wavelength range usage, smaller crystal sample size, larger protein molecular weight and complexity, as well as better diffraction resolution. The new research specialism of probing functional states directly in crystals, via time-resolved…
Protein Structure and DynamicsRNA and protein synthesis mechanismsEnzyme Structure and Function
Bas G. G. Lohmeijer、Daan Wouters、Zhihui Yin 等 4 位作者2004-01-01Chemical Communications
The synthesis and characterization of a new 4 x 4 library of block copolymers based on polystyrene and poly(ethylene oxide) connected by an asymmetrical octahedral bis(terpyridine) ruthenium complex at the block junction are described, while initial studies on the thin film morphology of the components of the library…
Advanced Polymer Synthesis and CharacterizationBlock Copolymer Self-AssemblyMachine Learning in Materials Science
Teddy M. Keller、S. B. Qadri、C.A. Little2004-01-01Journal of Materials Chemistry
Carbon nanotubes are formed in bulk compositions from thermal decomposition of a cobalt-containing organometallic compound in the presence of an excess amount of a multi(ethynyl)aromatic compound. The novel method described here permits the large-scale production of carbon nanotubes in a shaped, solid configuration. 1…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications