Hirokazu Sato、Tsunehiro Takeuchi、Uichiro Mizutani2001-08-15Physical review. B, Condensed matter
The Hume-Rothery matching rule has been widely used for many years as a practically useful guide to search for new quasicrystals and their approximants. In this work, we have performed the linear muffin-tin orbital atomic-sphere approximation band calculations for the nearly-free-electron-like ${\mathrm{Al}}_{30}{\mat…
Rare-earth and actinide compoundsQuasicrystal Structures and PropertiesX-ray Diffraction in Crystallography
Rafael Garcia Ribera、Mercedes Monteoliva‐Sánchez、A. Ramos‐Cormenzana2001-08-15Scientific Electronic Library Online (Scientific Electronic Library Online)
The nutritionally versatile Pseudomonas putida has showed to grow in olive oil waste water called "alpechín", which is toxic for many other microorganisms. The transformation with the plasmid pSK2665, harboring Alcaligenes eutrophus genes needed for synthesis of poly (3-hidroxybutyric acid), allow Pseudomona…
Biofuel production and bioconversionEnzyme Catalysis and Immobilizationbiodegradable polymer synthesis and properties
Qiong Wu、Ge Tian、Su-Qin Sun 等 5 位作者2001-08-15Journal of Applied Polymer Science
Abstract The premelting behavior of bacterially synthesized polyester poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyhexanoate), abbreviated as P(HB‐ co ‐HHx), was investigated by two‐dimensional Fourier‐transform infrared (2D FTIR) correlation spectroscopy. The temperature‐dependent dynamic spectra were measured over a tempera…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesMicroplastics and Plastic Pollution
R. S. Quimby2001-08-15Journal of Applied Physics
A self-calibrating quantum efficiency measurement technique is applied to the Tm3+ H43→F43 transition at 1460 nm. The method requires only relative fluorescence measurements to determine the absolute quantum efficiency. Overlapping spectral features are separated using phase-shifted fluorescence from different levels…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid State Laser Technologies
Tengjiao Hu、Chi Wu2001-08-15Macromolecules
Poly(ethylene oxide) (PEO) chains have been grafted onto a thermally sensitive poly( N -isopropylacrylamide) (PNIPAM) spherical microgel to form a novel quasi-planar polymer brush. The shrinking of the microgel at temperatures higher than 32 °C dramatically reduces its surface area, providing a convenient way to vary…
Advanced Sensor and Energy Harvesting MaterialsHydrogels: synthesis, properties, applicationsPolymer Surface Interaction Studies
Ronald E. van Kesteren、Naweed I. Syed、David W. Munno 等 7 位作者2001-08-15Journal of Neuroscience
Synapse formation is a crucial step in the development of neuronal circuits and requires precise coordination of presynaptic and postsynaptic activities. However, molecular mechanisms that control the formation of functionally mature synaptic contacts, in particular between central neurons, remain poorly understood. T…
Photochromic and Fluorescence ChemistryGenetics and Neurodevelopmental DisordersPhotoreceptor and optogenetics research
A. A. Aligia、Paula Petrone、Jorge O. Sofo 等 4 位作者2001-08-15Physical review. B, Condensed matter
We construct an effective Hamiltonian for the motion of electrons among the transition-metal ions of ordered double perovskites like ${\mathrm{Sr}}_{2}{\mathrm{FeMoO}}_{6},$ in which strong intra-atomic Coulomb repulsion U is present in only one of the inequivalent transition metal sites. Using a slave-boson formalism…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
Yuzhi Duan、Eli M. Pearce、T. K. Kwei 等 8 位作者2001-08-15Macromolecules
A phenolic polysiloxane, poly(4-ethenylphenolmethylsiloxane) (PEPS), that contains the phenolic hydroxyl group as a hydrogen-bond donor has been synthesized via hydrosilylation followed by hydrolysis. It was blended with a number of hydrogen-bond acceptors of different strengths, including poly(4-vinylpyridine) (PVPy)…
Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsPolymer crystallization and properties
G. P. Johari、E. Whalley2001-08-15The Journal of Chemical Physics
The dielectric relaxation spectra of ice V has been studied over the 133–270 K range, at frequencies in the 0.05 Hz–300 kHz range. Its dielectric relaxation time, τ, is 1.5 s at 133 K. The Arrhenius plot of its τ is found to bend sharply at ∼200 K, and the Arrhenius energy decreases from 49.9 kJ/mol at 260 K to 23.3 k…
Material Dynamics and PropertiesSmart Materials for ConstructionScientific Research and Discoveries
Rajeev Ahuja、Olle Eriksson、Börje Johansson2001-08-15Journal of Applied Physics
We have used the linear muffin-tin-orbital method, without geometrical approximations, to calculate the electronic structure of tetragonal BaTiO3 and cubic SrTiO3. Using our self-consistent potential, we have calculated the frequency-dependent dielectric function and the reflectivity spectrum. For tetragonal BaTiO3 th…
High-pressure geophysics and materialsMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides
Adam Wootton、B.S. Thomas、Peter Harrowell2001-08-15The Journal of Chemical Physics
Using classical dynamics simulations, we model the long-lived structural effect of ultraviolet irradiation on amorphous silica. We find a significant increase in density of a model of amorphous silica following localized energy deposition, in agreement with experimental observation. We present evidence that this densi…
Geological and Geochemical AnalysisMaterial Dynamics and PropertiesGlass properties and applications
I. Guedes、Y. Hirano、M. Grimsditch 等 6 位作者2001-08-15Journal of Applied Physics
The phonon modes of a pure ErVO4 crystal were determined at room temperature using Raman scattering methods, and the observed frequencies were assigned according to group theory in terms of the internal modes of the VO43− ions and the external modes of the Er(VO4) lattice. The assignments of the phonon modes match wel…
Luminescence Properties of Advanced MaterialsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Галина Телышева、Tatiana Dizhbite、Edgars Paegle 等 5 位作者2001-08-15Journal of Applied Polymer Science
Abstract An investigation of regularities of surface‐tension alterations in the aqueous solutions of lignosulfonate and aluminum‐containing organosilicon oligomer (olygoheterosiloxanolates) reaction mixtures revealed that modification with oligomers can be used for the regulation of the surface activity of lignosulfon…
Lignin and Wood ChemistryFlame retardant materials and propertiesSilicone and Siloxane Chemistry
Hakim Meskine、Harald König、S. Satpathy2001-08-15Physical review. B, Condensed matter
The microscopic origin of the exchange interaction in manganites is studied by solving an electronic model Hamiltonian for the Mn-O-Mn triad. It is shown that the magnetic structure of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ is correctly described within an electronic Hamiltonian model, p…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
Bernd H. A. Rehm、Qingsheng Qi、Br. Bernd BEERMANN 等 5 位作者2001-08-15Biochemical Journal
In order to facilitate the large-scale preparation of active class II polyhydroxyalkanoate (PHA) synthase, we constructed a vector pT7-7 derivative that contains a modified phaC1 gene encoding a PHA synthase from Pseudomonas aeruginosa possessing six N-terminally fused histidine residues. Overexpression of this phaC1…
biodegradable polymer synthesis and propertiesEnzyme Production and Characterization
Kyuichi Yasui2001-08-15The Journal of Chemical Physics
Computer simulations of bubble oscillations revealed that the bubble temperature at the collapse is highest for a moderately low acoustic amplitude because at higher acoustic amplitudes the bubble content is mostly vapor. The light emission of multibubble sonoluminescence is a combination of chemiluminescence and plas…
Fluid Dynamics and Heat TransferCombustion and Detonation ProcessesUltrasound and Cavitation Phenomena
N. Künzner、Dmitry Kovalev、J. Diener 等 8 位作者2001-08-15Optics Letters
We performed a study of the in-plane birefringence of anisotropically nanostructured Si layers, which exhibit a greater difference in the main value of the anisotropic refractive index than that of natural birefringent crystals. The anisotropy parameters were found to be strongly dependent on the typical size of the S…
Thin-Film Transistor TechnologiesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Henmei Ni、Yongzhong Du、Guanghui Ma 等 5 位作者2001-08-15Macromolecules
The characteristics of reactions in the monomer phase, aqueous phase, and the interface of monomer/aqueous phase of soap-free emulsion polymerization of 4-vinylpyridine (4VP) and styrene (St) system were evaluated by using the different types of initiators, addition of organic solvents, and changes of agitation rate.…
Advanced Polymer Synthesis and CharacterizationSurfactants and Colloidal SystemsPickering emulsions and particle stabilization
Corinne Binet、Michel Mitov、M. Mauzac2001-08-15Journal of Applied Physics
Due to the existence of a macroscopic helical structure, oriented cholesteric liquid crystals (CLCs) can selectively reflect light. The wavelength bandwidth for these Bragg reflections is limited: typically a few tens of nanometers due to limited birefringence values available in organic mesomorphic compounds. Here, w…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsAdvanced Materials and Mechanics
Rigoberto C. Advíncula、Eric Fells、Mikyoung Park2001-08-15Chemistry of Materials
Although the incorporation of small-molecule azobenzene dyes in polymer thin films has been investigated in the past, the application of the layer-by-layer adsorption technique has enabled incorporation of molecularly ordered dye layers without applying the Langmuir−Blodgett methodology. A problem with small-molecule…
Surfactants and Colloidal SystemsPolymer Surface Interaction StudiesPhotochromic and Fluorescence Chemistry