Olivier Monnier、Horst Lange‐Bertalot、Jean Bertrand2003-11-01Diatom Research
A new naviculoid diatom species, Nupela exotica Monnier, Lange-Bertalot & Bertrand spec. nov., has been discovered in a tropical freshwater aquarium near Orléans (France). It is described on the basis of SEM studies, complemented by LM observations. The diatom flora and water characteristics are particular, since taxa…
Marine and coastal ecosystemsAquatic Ecosystems and Phytoplankton DynamicsDiatoms and Algae Research
V. P. Gnezdilov、A. V. Yeremenko、Yu. G. Pashkevich 等 8 位作者2003-11-01Low Temperature Physics
The Raman-active phonons in perovskite-like LaMn1−xCoxO3 (x=0, 0.2, 0.3, 0.4, and 1.0) are studied by measuring the Raman spectra at temperatures of 295 and 5 K. The changes in the spectra with Co doping are correlated with the decrease of the orthorhombic distortions. Surprisingly, more phonon lines are observed than…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsSolid-state spectroscopy and crystallography
Alan N. Buckley、Andreas Hartmann、Robert N. Lamb 等 6 位作者2003-11-01Surface and Interface Analysis
Abstract Threshold Al KLL Auger electron spectroscopy and K‐edge x‐ray absorption fine structure spectroscopy have been used to examine technical purity (99.5%) aluminium foil before and after chemical treatment that altered the thickness and degree of hydroxylation of the oxidized layer. Comprehensive surface chemica…
Corrosion Behavior and InhibitionElectron and X-Ray Spectroscopy TechniquesSurface and Thin Film Phenomena
L. Grella、Gian F. Lorusso、David Adler2003-11-01Scanning
Abstract We present a three‐dimensional simulation of scanning electron microscope (SEM) images and surface charging. First, the field above the sample is calculated using Laplace's equation with the proper boundary conditions; then, the simulation algorithm starts following the electron trajectory outside the sample…
Advancements in Photolithography TechniquesElectron and X-Ray Spectroscopy TechniquesIntegrated Circuits and Semiconductor Failure Analysis
S. M. Sayyah、H. M. Abd El‐Salam2003-11-01International Journal of Polymeric Materials
The oxidative chemical polymerization of N-methylaniline was studied in hydrochloric acid solution using sodium dichromate as oxidant at 5°C under nitrogen atmosphere. The effect of hydrochloric acid, sodium dichromate and monomer concentration on the polymerization reaction was investigated. The order of reaction wit…
Corrosion Behavior and InhibitionConducting polymers and applicationsPolymer composites and self-healing
Mao Liang、Wenzhen Wang、Zhan‐Quan Liu 等 7 位作者2003-11-01Journal of Coordination Chemistry
A new copper complex, [Cu(phen)2N3]ClO4 (phen = 1,10-phenanthroline), has been synthesized and characterized by X-ray single-crystal structure analysis. The copper atom is five-coordinated with four nitrogen atoms of two phens and one nitrogen atom of the azide to form an intermediate coordination geometry distorted f…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Stephen P. Main2003-11-01Diatom Research
Diprora haenaensis gen. et sp. nov. Main, an araphid filamentous diatom, is described from a cryptic, pseudoaerial habitat in Kaua'i, Hawaiian Islands. The valve ends of this new diatom have pervalvar extensions of the mantle edges, termed here prows. The frustules are heavily silicified and usually heterovalvar (one…
Marine and coastal ecosystemsProtist diversity and phylogenyDiatoms and Algae Research
V.K. Tikhomirov、Angela B. Seddon、Maurizio Ferrari 等 6 位作者2003-11-01Europhysics Letters (EPL)
We show that the structure of transparent oxy-fluoride glass-ceramics formed by heat treatment of glasses of typical composition 32(SiO 2 ):9(AlO 1.5 ):31.5(CdF 2 ):18.5(PbF 2 ): 5.5(ZnF 2 ):3.5(ErF 3 ) mol% consists of ∼ 12 nm diameter, Er 3+ -doped, β-PbF 2 nano-crystals embedded in a silica-based glass network and…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsAerogels and thermal insulation
Donghyun Kim、Kieron Burke2003-11-01Applied Optics
We propose a simple procedure for designing an integrated single-chip grating-based thin-film filter. A simulation from a rigorous coupled-wave analysis shows that structural adjustment based on the effective medium theory can achieve the desired integration without notable performance degradation. Our spectropolarime…
Photonic and Optical DevicesPhotonic Crystals and ApplicationsOptical Coatings and Gratings
Éva Kiss、Mária Takács、I. Bertóti 等 4 位作者2003-11-01Polymers for Advanced Technologies
Abstract Poly( dl ‐lactide) (PLA) and two of its random copolymers with glycolic acid, poly( dl ‐lactide‐ co ‐glycolide) (PLGA) with 75/25 and 50/50 component ratios of lactide/glycolide were blended with poly(ethylene oxide)/poly(propylene oxide)/poly(ethylene oxide) (PEO–PPO–PEO) triblock non‐ionic surfactants, know…
biodegradable polymer synthesis and propertiesPolymer Surface Interaction StudiesAdvanced Drug Delivery Systems
Rafael Jiménez、J. Merced Martínez-Rosales、Jorge Cervantes2003-11-01Canadian Journal of Chemistry
Heterogeneous platinum catalysts (Pt/SiO 2 ) obtained by the sol-gel process at pH 3 and 9 have been used in the hydrosilylation reaction of 1-alkynes using various silanes. Once the catalysts were activated they were used in the hydrosilylation of 1-alkynes after a short induction period. The product distribution was…
Conducting polymers and applicationsMesoporous Materials and CatalysisPolyoxometalates: Synthesis and Applications
Sylvie Renault、M.D. MacKinnon、Clara Qualizza2003-11-01Journal of Environmental Quality
The oil sands industry in Alberta (Canada) has developed the composite tailings (CT) process to reduce the fluid fine tails resulting from the processing of oil sands. This process uses a chemical coagulant (gypsum or alum) to produce aggregated fines (clay), so they are retained with the coarse sand fraction of the e…
Soil and Unsaturated FlowClay minerals and soil interactionsCoal and Its By-products
R. I. Zakharchenya、A. A. Kaplyanskiǐ、A.B. Kulinkin 等 5 位作者2003-11-01Physics of the Solid State
Luminescence spectra of Cr 3+ ions in nanocrystalline MgO obtained by sol-gel technology were studied. The radiative lifetime of excited 2 E states of cubic and tetragonal Cr 3+ centers was found to be considerably longer than that of bulk single crystals. This effect is caused by a modified effective refractive index…
Luminescence Properties of Advanced MaterialsHigh-pressure geophysics and materialsGlass properties and applications
Kuanjun Fang、Longyun Hao、Xuecha Hu 等 4 位作者2003-11-01Textile Research Journal
Lyocell fibers have excellent properties, but they show a distinct tendency to fibrillate with wetting and mechanical stress. Chemical modification by esterification of these fibers could be a good means of solving this problem. A scanning electron microscopy analysis shows that treatment with polycar oxylic acids can…
Advanced Cellulose Research StudiesElectrospun Nanofibers in Biomedical ApplicationsTextile materials and evaluations
Ashish Agarwal、V. P. Seth、Sujata Sanghi 等 5 位作者2003-11-01Radiation effects and defects in solids
The optical absorption spectra of the glasses with composition xBi2O3·(30 − x)R2O·70B2O3 (R˭Li, Na, K) and xBi2O3·(70 − x)B2O3·30Li2O (0 ≤ x ≤ 20) have been recorded in the wavelength range 350–650 nm. The glass samples were prepared by the normal melt–quench technique. The fundamental absorption edge for all the seri…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsPhotorefractive and Nonlinear Optics
Miaofang Chi、Hui Gu、Xin Wang 等 4 位作者2003-11-01Journal of the American Ceramic Society
A phenomenon of bilevel solubility was observed in a TiO 2 ‐doped (2.0 wt%) alumina with bimodal microstructure sintered in N 2 . Surface contributions to dopant signals in individual grains were identified and removed, using a spatially resolved energy dispersive spectroscopy analysis. Two levels of solubility, 1.005…
Advanced ceramic materials synthesisSolidification and crystal growth phenomenaIntermetallics and Advanced Alloy Properties
Shu‐Hua Chan、Yiyang Lin、Ching Ting2003-11-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNanoblends of Incompatible Polymers by Direct Space-Confined PolymerizationShu-Hua Chan, Yi-Yang Lin, and Ching TingView Author Information Union Chemical Laboratories, Industrial Technology Research Institute, 321 Kuang-Fu Road, Se…
Mesoporous Materials and CatalysisPolymer Surface Interaction StudiesBlock Copolymer Self-Assembly
Chip Appel、Q. Lena、R. D. Rhue 等 4 位作者2003-11-01Soil Science Society of America Journal
Measurement of cation selectivity in soils provides important information about the affinity and binding strength of a particular cation on soil surfaces. Gaines‐Thomas ( K GT ) selectivity coefficients were determined for a variety of K/Ca and K/Pb ratios on an Oxisol and Ultisol soil from Puerto Rico. The calculated…
Heavy metals in environmentClay minerals and soil interactions
Alexander Y. Feldman、M. Fernanda González、G. Marom2003-11-01Macromolecular Materials and Engineering
Abstract Aramid (kevlar‐49) fibers were surface treated by two different methods to induce roughness and then used to produce unidirectional nylon 66 based composites. The transcrystallinity generated around the treated fibers was characterized by SEM and polarized light microscopy and compared with the regular transc…
Polymer crystallization and propertiesNatural Fiber Reinforced CompositesFiber-reinforced polymer composites
S. S. Moliver2003-11-01Technical Physics
Quantum-chemical open-shell method with parametrization INDO is used to construct the model of a large unit cell for the [Si- V ] 0 impurity complex in diamond. It is shown that the ground spin-triplet state of the complex exerts tunnel (rather than Jahn-Teller) splitting associated with off-center shift of Si atom al…
High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchForce Microscopy Techniques and Applications