Wiebe H. C. F. Kooistra、Gandi Forlani、F. A. S. Sterrenburg 等 4 位作者2004-01-01Phycologia
A new genus, Talaroneis Kooistra & De Stefano, gen. nov. and a new species T. posidoniae Kooistra & De Stefano, sp. nov. are described. The elongate cells, which were found on a leaf of Posidonia oceanica, formed star-, zigzag- or ribbon-shaped colonies in culture. The distinctive character of T. posidoniae was the pr…
Marine and coastal ecosystemsMarine Biology and Ecology ResearchDiatoms and Algae Research
Stojan S. Djokić2004-01-01Journal of The Electrochemical Society
Chemical (electroless) deposition of silver oxysalts such as Ag 7 NO 11 × 3 Ag 2 SO 4 and Ag 7 NO 11 as powders or on a textile, i.e. , high density polyethylene is investigated. The process is based on a reaction between AgNO 3 , a source of Ag(I) ion, and ( NH 4 ) 2 S 2 O 8 or K 2 S 2 O 8 used as oxidizing agents of…
Nanocomposite Films for Food PackagingConducting polymers and applicationsPigment Synthesis and Properties
Krzysztof Milkowski、James H. Clark、Shinichi Doi2004-01-01Green Chemistry
A range of novel starch based graft composites with synthetic polymers were prepared. These exhibit high surface areas as well as excellent thermal stabilities and useful wetting properties.
biodegradable polymer synthesis and properties
Robert W. Corkery2004-01-01Physical Chemistry Chemical Physics
Remarkable room-temperature liquid crystallinity is observed for a wide range of metal soaps. Incorporation of saturated, mid-chain mono-methyl branched C17 fatty acid (mid-chain branched fatty acid) into metal soaps lowers the liquid crystalline transition to below room temperature. Soaps of Na, Mg, Al, Ca, Cu, Zn, S…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesSurfactants and Colloidal Systems
Anderson Reginaldo Sampaio、A. J. Palangana、Ronaldo Celso Viscovini2004-01-01Molecular Crystals and Liquid Crystals
Lyotropic nematic textures are investigated, by image processing, near the reentrant isotropic (IRE)–discotic nematic (ND)–biaxial nematic (NB)–clamitic nematic (NC)–isotropic (I) phase transitions in a lyotropic mixture of potassium laurate, decanol, and D2O. The (NB), intermediate phase between the two uniaxial nema…
Liquid Crystal Research AdvancementsAdvanced Optical Imaging TechnologiesOptical Polarization and Ellipsometry
P. Sreekumari Nair、Karolina P. Fritz、Gregory D. Scholes2004-01-01Chemical Communications
The thermolysis reaction of a dual precursor system, comprising one that promotes a controlled nucleation event to produce a rod-shaped nanocrystal template, and the other introduced through a subsequent series of injections that maintain the reaction under kinetic drive, is shown to provide a means of controlling gro…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsCopper-based nanomaterials and applications
Przemysław Starynowicz2004-01-01Dalton Transactions
Two complexes of divalent samarium have been synthesized by electrochemical reduction in methanol-tetrahydrofuran solutions: [Sm(18-crown-6)(ClO4)2] and [Sm(15-crown-5)2](ClO4)2. In [Sm(18-crown-6)(ClO4)2] the metal cation is ten-coordinate and its coordination sphere comprises six oxygen atoms of the crown ligand and…
Radioactive element chemistry and processingLanthanide and Transition Metal ComplexesCatalysis and Oxidation Reactions
Jiebin Pang、J. Eric Hampsey、Qingyuan Hu 等 6 位作者2004-01-01Chemical Communications
Ia3d cubic mesoporous silica with unusual thermal stability has been synthesized using cetyltrimethylammonium bromide (CTAB) and sugar surfactant dodecyl-beta-D-maltoside (DM) as co-templates.
Mesoporous Materials and CatalysisPolyoxometalates: Synthesis and ApplicationsLayered Double Hydroxides Synthesis and Applications
K. L. Ngai2004-01-01AIP conference proceedings
Advance in understanding glass transition dynamics is made by identifying (1) the “universal” Johari‐Goldstein (JG) relaxation with the primitive relaxation of the coupling model and (2) the nearly constant loss (NCL) as the short time caged dynamics, all with support from experimental data. Dynamics proceeds with tim…
Material Dynamics and PropertiesPhotochemistry and Electron Transfer StudiesNonlinear Dynamics and Pattern Formation
Karen E. Jackson、Richard L. Boitnott、Edwin L. Fasanella 等 5 位作者2004-01-01NASA Technical Reports Server (NASA)
This paper summarizes 2-1/2 decades of full-scale aircraft and rotorcraft crash testing performed at the Impact Dynamics Research Facility (IDRF) located at NASA Langley Research Center in Hampton, Virginia. The IDRF is a 240-ft.-high steel gantry that was built originally as a lunar landing simulator facility in the…
High-Velocity Impact and Material BehaviorStructural Response to Dynamic LoadsTransportation Safety and Impact Analysis
Akihiko Suda、Kae Yamamura、Yoshio Ukyo 等 8 位作者2004-01-01Journal of the Ceramic Society of Japan
The oxygen storage capacity (OSC) of a ceria-zirconia(CeO2-ZrO2) solid solution containing 50 mol% ZrO2 is approximately 400 μmol-O2/g, which corresponds to approximately 50% of the theoretical OSC limit calculated from the valence change of the Ce ion. There are two possible explanations for the OSC suppression of ap…
Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
Marı́a Silvina Fornasari、Diego A. Laplagne、Nicolás Frankel 等 6 位作者2004-01-01Molecular Biology and Evolution
Riboflavin, an essential cofactor for all organisms, is biosynthesized in plants, fungi and microorganisms. The penultimate step in the pathway is catalyzed by the enzyme lumazine synthase. One of the most distinctive characteristics of this enzyme is that it is found in different species in two different quaternary s…
Genomics and Phylogenetic StudiesEnzyme Structure and FunctionBiochemical and Molecular Research
Matthew S. Barrow、Richard Jones、Jung O. Park 等 6 位作者2004-01-01Journal of Spectroscopy
We report studies of ordered microporous and nanoporous polymer films formed by the evaporation of polymer solutions following exposure to a humid atmosphere. High speed microphotographic (HSMP) studies of the formation process showed that near the surface of the polymer solution, vapour condensation produced near mon…
Advanced Polymer Synthesis and CharacterizationMesoporous Materials and CatalysisBlock Copolymer Self-Assembly
M. S. Vinodh、Lars P. H. Jeurgens2004-01-01Surface and Interface Analysis
Abstract The effects of anisotropy of the photoionization cross‐section and elastic scattering of photoelectrons in solids are investigated for angle‐resolved XPS spectra (ARXPS) recorded from α–Al 2 O 3 substrate in parallel data acquisition mode. It is shown that for quantitative analysis of ARXPS spectra recorded i…
Advancements in Photolithography TechniquesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
Simon Penner、Di Wang、R. Podloucky 等 5 位作者2004-01-01Physical Chemistry Chemical Physics
Pt and Rh nanoparticles obtained by epitaxial growth on NaCl (001) were coated with a crystalline ceria support and subjected to systematic hydrogen reduction in the temperature range 573 K ≤ T ≤ 973 K. The structural and morphological changes were examined by high resolution electron microscopy and selected area elec…
Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
N. Puviarasan、V. Arjunan、S. Mohan2004-01-01DergiPark (Istanbul University)
The FTIR spectra of 4-aminoquinaldine and 5-aminoquinoline were recorded in solid phase on a Bruker IFS 66V spectrometer in the region 4000--400 cm-1. The FT-Raman spectra of these compounds were also recorded in the same instrument with a FRA 106 Raman module. The molecules under investigation are considered to have…
Nonlinear Optical Materials Research
Mauro Botta、Silvio Quici、Gianluca Pozzi 等 7 位作者2004-01-01Organic & Biomolecular Chemistry
Five novel Gd(iii) complexes based on the structure of the heptadentate macrocyclic 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid (DO3A) ligand have been synthesized and their (1)H and (17)O NMR relaxometric properties investigated in detail. The complexes have been functionalised on the secondary nitrogen atom…
Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Kok Swee Sim、John T. L. Thong、J.C.H. Phang2004-01-01Scanning
Abstract The effect of shot noise and emission noise due to materials that have different emission properties was simulated. Local variations in emission properties affect the overall signal‐to‐noise ratio (SNR) value of the scanning electron microscope image. In the case in which emission noise is assumed to be absen…
Advancements in Photolithography TechniquesElectron and X-Ray Spectroscopy TechniquesIntegrated Circuits and Semiconductor Failure Analysis
B. Pitonzo、P. Castro、Penny S. Amy 等 6 位作者2004-01-01CORROSION
Microorganisms, implicated in microbiologically influenced corrosion, were isolated from the deep subsurface at Yucca Mountain. Corrosion rates of iron-oxidizing, sulfate-reducing, and exopolysaccharide (EPS)-producing bacteria were examined in constructed electrochemical corrosion cells for periods up to 109 days. Th…
Corrosion Behavior and InhibitionMetal Extraction and BioleachingWater Treatment and Disinfection
W. Wang、Xiao Li、Jinghua Wang 等 5 位作者2004-01-01Materials and Corrosion
Abstract The changes of corrosion potential (E corr ) of metals immersed in seawater were investigated with electrochemical technology and epifluoresence microscopy. In natural seawater, changes of E corr were determined by the surface corrosion state of the metal. E corr of passive metals exposed to natural seawater…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsConcrete Corrosion and Durability