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  • 1
    Electronic Resource
    Electronic Resource
    The Gaseous Electronic Conference (GEC) reference cell as a benchmark for understanding microelectronics processing plasmas : The 40th annual meeting of the division of plasma physics of the american physical society (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 2307-2313 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A collaborative experimental effort was initiated at a workshop at the 1988 Gaseous Electronics Conference (GEC) to start a program to understand the fundamental physics of processing plasmas, as well as give researchers a baseline experiment to develop plasma diagnostics to be used on manufacturing plasma systems. The design was based on the use of 4 in. diameter, aluminum electrodes in a parallel plate configuration at 13.56 MHz, run in a capacitively coupled discharge mode. Before conclusions about commercial plasma systems can be made from experimental results from the GEC cell, the GEC cell must be shown to behave similarly to that of a commercial system. The etching performance of a GEC cell was compared to a SEMI Group 1000 TP/CC reactive ion etcher (RIE). The GEC cell and the RIE gave similar etch rates and fluorine concentrations when the electrode plate spacing and power density were the same. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873482
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  • 2
    Electronic Resource
    Electronic Resource
    Simultaneous capillary GC-MS determination of triazines and amides in water (1996)
    Springer
    Chromatographia 43 (1996), S. 181-186 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography-mass spectrometry ; Triazines ; Amides ; Water pollution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simultaneous capillary Gas Chromatographic-Mass Spectrometric (GC-MS) method is described for the determination of thirteen pesticides belonging to the triazine and amide families in water. The sample is extracted in liquid-liquid mode (dichloromethane) and then the determination of the residues is carried out by capillary gas chromatography with mass spectrometric detection in the Selected-Ion Monitoring mode (SIM). The average recoveries of spiked compounds are in the 78.4–135.4% range between the relative low level (0.100 μg L−1) and the relative high level (10.0 μg L−1). The limits of detection (LOD) are in the 0.009–0.128 μg L−1 range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02292948
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of organophosphorus, organochlorine and pyrethroid insecticides in medicinal plants (1997)
    Springer
    Chromatographia 44 (1997), S. 505-513 
    Details
    ISSN: 1612-1112
    Keywords: Colum liquid chromatography ; Gel permeation chromatography ; Gas chromatography ; Organophosphorus, organochlorine and pyrethroid pesticides ; Multiresidue analysis in medicinal plants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Multiresidue analysis of organophosphorus, organochlorine and pyrethroid pesticides in medicinal plants, gives problems of extraction, purification and detection. Analytical methodologies have been developed for vervain and tested for camomile and peppermint without prior knowledge of the pesticides used in their treatment. Extraction is common to all three pesticide families: acetone or acetonitrile is chosen depending on the particular matrix. Isolation of organophosphorus compounds is performed by gel permeation chromatography. Organochlorine and pyrethroid pesticides are extracted in two steps: gel permeation followed by adsorption chromatography on silica el cartridges. Analysis and detection of organophosphorus compounds is by gas chromatography with a nitrogen phosphorus detector; organochlorine and pyrethroid compounds are identified by gas chromatography with an electron capture detector.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02466744
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  • 4
    Electronic Resource
    Electronic Resource
    Modelling of GC and HPLC separations of simazin and atrazin by Experimental Design methodology (1995)
    Springer
    Chromatographia 41 (1995), S. 553-560 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Gas chromatography ; Experimental design ; Modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Experimental Design methodology allows the modelling and optimization of the chromatographic separation of similar pesticides (triazine family) by GC and HPLC. The GC separation of simazin and atrazin is well modelled by a first degree equation, involving injected volume, carrier gas pressure and rising oven temperature. The LC is modelled by a second degree equation, depending on injected volume, eluent flow and composition. These calculated models allow easy optimization of the separations, using isoresponse curves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269719
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  • 5
    Electronic Resource
    Electronic Resource
    N-body study of anisotropic membrane inclusions: Membrane mediated interactions and ordered aggregation (1999)
    Springer
    The European physical journal 12 (1999), S. 9-12 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 87.15.Kg Molecular interactions; membrane-protein interactions - 64.60.Cn Order-disorder transformations; statistical mechanics of model systems - 24.10.Cn Many-body theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We study the collective behavior of inclusions inducing local anisotropic curvatures in a flexible fluid membrane. The N-body interaction energy for general anisotropic inclusions is calculated explicitly, including multi-body interactions. Long-range attractive interactions between inclusions are found to be sufficiently strong to induce aggregation. Monte Carlo simulations show a transition from compact clusters to aggregation on lines or circles. These results might be relevant to proteins in biological membranes or colloidal particles bound to surfactant membranes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050968
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  • 6
    Electronic Resource
    Electronic Resource
    Microscopic membrane elasticity and interactions among membrane inclusions: interplay between the shape, dilation, tilt and tilt-difference modes (1999)
    Springer
    The European physical journal 11 (1999), S. 261-272 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 34.20-b Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions - 82.65Dp Thermodynamics of surfaces and interfaces - 46.70.Hg Membranes, rods and strings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A phenomenological Landau elasticity for the shape, dilation, and lipid-tilt of bilayer membranes is developed. The shape mode couples with the sum of the monolayers' tilt, while the dilation mode couples with the difference of the monolayers' tilts. Interactions among membrane inclusions within regular arrays are discussed. Inclusions modifying the membrane thickness and/or inducing a tilt-difference due to their convex or concave shape yield a dilation-induced attraction and a tilt-difference-induced repulsion. The resulting interaction can stabilize 2D crystal phases, with the possible coexistence of different lattice spacings when the dilation-tilt-difference coupling is large. Inclusions favoring crystals are those with either a long-convex or a short-concave hydrophobic core. Inclusions inducing a local membrane curvature due to their conical shape repel one another. At short inclusions separations, a tilt comparable with the inclusion's cone angle develops: it relaxes the membrane curvature and reduces the repulsion. At large separations the tilt vanishes, whatever the value of the shape-tilt coupling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1088/0953-8984/11/25/101
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  • 7
    Electronic Resource
    Electronic Resource
    Hydrogen evolution reaction on electrocatalytic materials highly dispersed on carbon powder (1995)
    Springer
    Journal of applied electrochemistry 25 (1995), S. 923-932 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Highly dispersed electrocatalytic materials were obtained by vacuum deposition of catalytic metals on electromechanically suspended graphite powder particles. Graphite electrodes, vacuum-deposited with various metals (Ni, Pt, Au, Pd, Rh) or an alloy (Cu-Al), were bonded with an inorganic polymer, LaPO4. A.c. impedance and steady-state polarization methods were used to investigate the mechanism and kinetics of the hydrogen evolution reaction (HER) in 1m KOH at 25°C for Pt/C, Pd/C and Rh/C electrodes. It was concluded that the HER follows a Volmer-Heyrovsky mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00241586
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  • 8
    Electronic Resource
    Electronic Resource
    Surface characterization of natural graphite powder composite electrodes by atomic force microscopy (1996)
    Springer
    Journal of materials science 31 (1996), S. 513-518 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Graphite powder electrodes bonded by polymerized LaPO4 have been investigated for the first time by atomic force microscopy (AFM). The interest in investigating this material stems from the fact that graphite electrodes intercalated, or not, with various metals and bonded with LaPO4 have shown very good mechanical and electrochemical stability during the hydrogen evolution reaction (HER) in 1 M KOH aqueous solutions. Examination of their surfaces by scanning electron microscopy has revealed that these electrodes are very porous. AFM furnishes additional data about the surface and can therefore be considered a powerful tool for surface characterization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01139172
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  • 9
    Electronic Resource
    Electronic Resource
    Distribution and submicroscopic immunogold localization of cellular prion protein (PrPc) in extracerebral tissues (1998)
    Springer
    Cell & tissue research 292 (1998), S. 77-84 
    Details
    ISSN: 1432-0878
    Keywords: Key words Prion protein (PrPc) ; Electron microscopy ; Secretory granules ; Membrane ; Extracerebral tissues ; Hamster ; Human
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  In transmissible spongiform encephalopathies (TSE), such as scrapie in animals and Creutzfeldt-Jakob disease in humans, the central event is the conversion of a host-encoded amyloidogenic protein (PrPc) into an abnormal isoform (PrPsc) that accumulates as amyloid in TSE brain. PrPc is a membrane sialoglycoprotein synthesized in the central nervous system and elsewhere. We have examined the ultrastructural localization of PrPc in numerous hamster and some human extracerebral tissues, by means of a post-embedding electron-microscopic method combined with immunogold labeling. In stomach, intestine, lung, and kidney from hamsters, and in stomach, kidney, and spleen from humans, immunogold labeling specific for PrPc is observed on various cellular substructures related to secretory pathways: Golgi apparatus, secretory globules, and plasma membrane. In mucous epithelial cells of stomach and intestine, PrPc appears to be concentrated in secretory globules, suggesting a role for PrPc in the secretory function of the digestive tract. The secretory aspect of PrPc may be a key to understanding the physiopathological mechanisms underlying TSE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004410051036
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  • 10
    Electronic Resource
    Electronic Resource
    Hardy and Paley Inequalities for Fully-Odd Vilenkin Systems (1997)
    Springer
    Acta mathematica hungarica 75 (1997), S. 89-103 
    Details
    ISSN: 1588-2632
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006534802172
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