Andreas Oeltjen、Wolfgang E. Krumbein、Erhard Rhiel2002-03-01Plant Biology
Abstract: The transcript sizes of fcp genes of Cyclotella cryptica, belonging to different fcp gene clusters and encoding different fucoxanthin chlorophyll a/c light harvesting polypeptides (Fcps), were determined. Furthermore, the diurnal expression of the fcp1/fcp2/fcp3/fcp5 gene cluster and the steady state mRNA co…
Marine and coastal ecosystemsAlgal biology and biofuel productionDiatoms and Algae Research
María L. Cerrada、Rosario Benavente、Ernesto Pérez2002-03-01Macromolecular Chemistry and Physics
Several composites with short glass fiber of a copolymer of ethylene and 1-octene, synthesized with a metallocene catalyst, have been prepared, up to a fiber content of 40 wt.-%. The effect of the fiber on the crystalline structure and on the viscoelastic response are analyzed. The role of glass fiber incorporation on…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesFiber-reinforced polymer composites
Qingfeng Hou、Dirk W. Grijpma、Jan Feijén2002-03-01Macromolecular Rapid Communications
Porous poly(ε-caprolactone) structures have been prepared by leaching of compression moulded salt-containing polymer precipitates. Coagulation takes place when a PCL solution containing dispersed water-soluble salt particles is precipitated into an excess of non-solvent. Porous scaffolds are obtained after leaching of…
Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesElectrospun Nanofibers in Biomedical Applications
S. Spälter、Harold Y. Hwang、J. Zimmermann 等 7 位作者2002-03-01Optics Letters
Single-mode planar waveguides were fabricated from chalcogenide glass compounds with large Kerr nonlinearities. Strong self-phase modulation of subpicosecond pulses along with low linear and nonlinear absorption losses demonstrates the potential for ultrafast, low-power, all-optical processing applications.
Glass properties and applicationsPhase-change materials and chalcogenidesNonlinear Optical Materials Studies
S. A. Shipilov2002-03-01Fatigue & Fracture of Engineering Materials & Structures
ABSTRACT The corrosion fatigue crack growth (FCG) behaviour, the effect of applied potential on corrosion FCG rates, and the fracture surfaces were studied for high‐strength low‐alloy steels, titanium alloys, and magnesium alloys. During investigation of the effect of applied potential on corrosion FCG rates, polariza…
Corrosion Behavior and InhibitionFatigue and fracture mechanicsHydrogen embrittlement and corrosion behaviors in metals
Martin Bröring、Carsten D. Brandt、J. Bley-Escrich 等 4 位作者2002-03-01European Journal of Inorganic Chemistry
Copper(II) and palladium(II) complexes of two 2,2′-bidipyrrin ligands were prepared and examined, in comparison with the known nickel(II) complexes of these ligands, by means of X-ray crystallography, cyclic voltammetry, and spectroelectrochemistry. All compounds are of helical geometry with coordination environments…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryElectron Spin Resonance Studies
Hiroyuki Takei、Michael Himmelhaus、Takayuki Okamoto2002-03-01Optics Letters
A surface-adsorbed monolayer of cap-shaped gold particles upon submicrometer-sized polystyrene spheres exhibits pronounced absorption in the visible region. When the surrounding refractive index was altered by immersion in a fluid, the direction of the shift in the absorption spectrum was dependent on the incidence an…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchPhotonic Crystals and Applications
Shan‐Tao Zhang、Bin Yang、Yanfeng Chen 等 8 位作者2002-03-01Journal of Applied Physics
Polycrystalline ferroelectric SrBi4Ti4O15 thin films were prepared on Pt-coated silicon substrates by pulsed laser deposition. Structures of the films were analyzed by x-ray diffraction, atomic force microscopy (AFM) and scanning electron microscopy. At an applied field of 275 kV/cm, the films showed good hysteresis l…
Ferroelectric and Piezoelectric MaterialsUltrasonics and Acoustic Wave PropagationAcoustic Wave Resonator Technologies
Fabrice Yerly、Kenneth I. Hardcastle、Lothar Helm 等 6 位作者2002-03-01Chemistry - A European Journal
Molecular dynamics simulations of [Gd(egta)(H(2)O)](-) (egta(4-)=3,12-bis(carboxymethyl)-6,9-dioxa-3,12-diazatetradecanedioate(4-)) have been performed without any artificial constraint on the first coordination sphere, such as covalent bonds between the Gd(3+) and the coordination sites. Two new crystallographic stru…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Debby de Groot、Joost N. H. Reek、Paul C. J. Kamer 等 4 位作者2002-03-01European Journal of Organic Chemistry
Phosphane-functionalised carbosilane dendrimers 9, 10, 11, 12, 13, 19 and 20 have been synthesised, and their palladium complexes have been used as catalysts in the allylic substitution reaction. The catalytic sites at the periphery of the dendrimer support are readily accessible to the substrate, which is reflected −…
Supramolecular Chemistry and ComplexesChemical Synthesis and AnalysisDendrimers and Hyperbranched Polymers
Chi‐Shun Tu、Chih‐Long Tsai、Jie-Ying Chen 等 4 位作者2002-03-01Physical review. B, Condensed matter
Dielectric permittivities, polarization--electric-field hysteresis loops, and domain structures have been measured as a function of temperature in relaxor-based ferroelectric single crystals $({\mathrm{PbMg}}_{1/3}{\mathrm{Nb}}_{2/3}{\mathrm{O}}_{3}{)}_{0.68}({\mathrm{PbTiO}}_{3}{)}_{0.32}$ (PMN-32%PT) for $〈110{〉}_{\…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis
Arkady V. Krasheninnikov、K. Nordlund2002-03-01Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena
Using empirical-potential and tight-binding models, we study the structure and stability of atomic-scale irradiation-induced defects on walls of carbon nanotubes. Since atomic vacancies are the most prolific but metastable defects which appear under low-dose, low-temperature ion irradiation, we model the temporal evol…
Carbon Nanotubes in CompositesAdvanced Electron Microscopy Techniques and ApplicationsIon-surface interactions and analysis
Alexander Heckel、Dieter Seebàch2002-03-01Helvetica Chimica Acta
Vinyl-substituted chiral salens (salen=bis(salicylidene)ethylidenediamine) are used for attachment to Me3Si-hydrophobized silica gel (controlled-pore glass, CPG), carrying covalently bound mercaptopropyl ‘substituents', by AIBN-mediated radical addition of SH groups to styryl C=C bonds (Scheme 1, Table 1, and Figs. 1…
Mesoporous Materials and CatalysisPorphyrin and Phthalocyanine ChemistryPolyoxometalates: Synthesis and Applications
Andrei V. Kabashin、Jean‐Philippe Sylvestre、Sergiy Patskovsky 等 4 位作者2002-03-01Journal of Applied Physics
Pulsed laser ablation in an inert gas has been used to fabricate films containing silicon nanocrystals. We show that film microstructure is one of the main factors, determining long-term photoluminescence (PL) properties. Films with different porosity were found to exhibit PL signals with quite different peak energies…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsIon-surface interactions and analysis
M. Mihalkovič、Ibrahim Al-Lehyani、Eric Cockayne 等 8 位作者2002-03-01Physical review. B, Condensed matter
Quasicrystals are metal alloys whose noncrystallographic symmetries challenge traditional methods of structure determination. We employ quantum-based total-energy calculations to predict the structure of a decagonal quasicrystal from first-principles considerations. Our Monte Carlo simulations take as input the knowle…
Crystal Structures and PropertiesQuasicrystal Structures and PropertiesX-ray Diffraction in Crystallography
Zhenghe Peng、Cai Ping、Chen‐Jie Fang 等 4 位作者2002-03-01Wuhan University Journal of Natural Sciences
The complete experimental IR spectra and vibrational analysis of the title complex Co(mnt) (dmbpy) were reported in this paper. The results show that the complex molecule has a planar geometry belonging to point groupC 2v and ground electronic state with spin quartet. A new method for analyzing vibrational spectra of…
Magnetism in coordination complexesNonlinear Optical Materials ResearchOrganic and Molecular Conductors Research
E. F. Venger、T.Ya. Gorbach、S. I. Kirillova 等 5 位作者2002-03-01Semiconductors
Scanning electron microscopy has shown etching of a porous silicon layer in an HF solution to be irregular. The intensity of porous silicon photoluminescence significantly decreases during gradual etching off, and its peak initially shifts to shorter and then to longer wavelengths. Under red-light pulse excitation, ph…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
David E. Zelmon、Shyam Bayya、Jasbinder S. Sanghera 等 4 位作者2002-03-01Applied Optics
Gallogermanate glasses are the subject of intense study as a result of their unique combination of physical and optical properties, including transmission from 0.4 to beyond 5.0 microm. These glasses can be easily made into large optics with high-index homogeneity for numerous U.S. Department of Defense and commercial…
Glass properties and applicationsPhotorefractive and Nonlinear OpticsOptical and Acousto-Optic Technologies
Fabio Bignotti、Maurizio Penco、Luciana Sartore 等 6 位作者2002-03-01Macromolecular Symposia
Thermodegradative investigations of two classes of multi-block copolymers containing poly(D,L-lactic-glycolic acid) (PLGA) and either poly(ethylene glycol) (PEG) or poly(ϵ-caprolactone) diol-terminated (PCDT) segments were performed. In particular, the influence of the type and length of the segments as well as of the…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysis
Y-J. Kim2002-03-01CORROSION
Effects of a variety of water chemistry conditions on the theoretical understanding and development of an electrochemical corrosion potential (ECP) prediction model to calculate the ECP of structural materials in boiling water reactors (BWR) are described. In particular, the effects of dissolved oxygen (O2), hydrogen…
Corrosion Behavior and InhibitionHigh-Temperature Coating BehaviorsHydrogen embrittlement and corrosion behaviors in metals