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  • 1995-1999  (86)
  • 1980-1984
  • 1930-1934
  • 1998  (86)
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  • 1995-1999  (86)
  • 1980-1984
  • 1930-1934
Year
  • 1
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    Quinolines as potent 5-lipoxygenase inhibitors: Synthesis and biological profile of L-746,530 (1998)
    Elsevier
    Details
    Publication Date: 1998-05-01
    Print ISSN: 0960-894X
    Electronic ISSN: 1464-3405
    Topics: Chemistry and Pharmacology , Medicine
    Published by Elsevier
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Preliminary results of the 14 GHz SERSE superconducting electron cyclotron resonance ion source working in high-B mode : Proceedings of the 7th international conference on ion sources (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 653-655 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: After the first operation of the SERSE superconducting source assembled with reduced performance coils, the tests of the new SERSE magnetic system were carried out with excellent results. The specifications of the design field were reached and exceeded. The new coils were mounted and SERSE is now able to run at full performance magnetic field. The today's status of the facility, electron cyclotron resonance source and new magnetic configuration, is described. The first tests as a multicharged ion source have just started, and a few preliminary results are given and commented. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1148625
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  • 3
    Electronic Resource
    Electronic Resource
    Summary of the performances of the superconducting electron cyclotron resonance ion source at 14 GHz (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 4082-4085 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This article deals with the most recent performance of the superconducting electron cyclotron resonance ion source (SERSE) working at 14 GHz with high magnetic fields after the required conditioning and optimization of several operating parameters. SERSE has now achieved an outstanding level of performance in delivering highly charged ion beams in argon and oxygen gases: the results obtained while operating in a stainless steel chamber and with an aluminum liner are shown and discussed. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149254
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  • 4
    Electronic Resource
    Electronic Resource
    Modeling of electron-cyclotron-resonance ion source and scaling laws : Proceedings of the 7th international conference on ion sources (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 1100-1102 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The heating and confinement of electrons in an electron-cyclotron-resonance ion source (ECRIS) plasma is described: the single particle motion in a magnetic beach is presented, showing the role of the rf wave magnetic field in the electron losses. This effect can be approximately modeled by a Fokker–Planck quasilinear equation in velocity space. This modeling is discussed and numerical results are presented. The behavior of the wave close to resonance is analyzed, taking into account the thermal motion of the electrons. The role of the different design parameters (including rf frequency) is shown and the major ingredients for the design of an efficient ECRIS for multiply charged ions production are summarized. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1148588
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  • 5
    Electronic Resource
    Electronic Resource
    Local Electrical Behavior, Crystallography, and Chemistry of Grain Boundaries in Mn-Zn Ferrites (1998)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 81 (1998), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: This investigation is devoted to grain boundaries, since, for high-frequency applications, eddy-current losses can be minimized by selectively increasing the resistivity of grain boundaries. Two specific commercial Mn-Zn ferrites were considered. The first one, selected to be a reference sample, exhibited good permeability, whereas the second one was chosen to promote a strong segregation of calcium on the grain boundaries via the addition of CaO and SiO2. To explain the behavior of this material chemical, crystallographical and electrical properties were collated. Initially, maps of potential barriers were recorded on a scale representative of the bulk microstructure by voltage contrast via scanning electron microscopy at 1 keV. In addition to the potential maps, the local electrical potential was measured quantitatively via local probing. It was evidenced that there was no percolation path through weak barriers at the grain boundaries. To gain information on very small voltage drops, in particular within grains, the microelectrode technique was used on the same areas. It showed a very different behavior between the two samples for the intragranular resistivity, as well as for interfacial barriers. Then, the crystallochemistry of the grain boundaries was investigated via analytical conventional transmission electron microscopy and scanning transmission electron microscopy techniques, and the specific segregation of calcium and the depletion of Fe2+ versus Fe3+ ions at general grain boundaries (GBs) was evidenced. The chemistry and microstructure of the grain boundaries were related to their crystallography. By local electrical probing via transmission electron microscopy, the interfacial barriers were directly related to the type of grain boundary. It was shown that high electrical barriers correspond to high-energy GBs, where there are no orientation relationships between adjacent grains; on the other hand, low-energy GBs, which present orientation relationships and/or dense interfacial planes, are characterized by low barriers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1998.tb02460.x
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  • 6
    Electronic Resource
    Electronic Resource
    Microfiltration and Ultrafiltration Ceramic Membranes for Apple Juice Clarification (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 63 (1998), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Depectinized control (CTJ) and ascorbic acid treated (AAJ) apple juices were filtered through microfiltration (MF, 0.2 m) and ultrafiltration (UF, 0.02 m) ceramic tubular membranes. Under optimal conditions (8 m/s, 414 kPa and 50°C), the UF membrane resulted in higher steady state flux and less fouling than the MF membrane for both juices. AAJ produced by addition of AA at milling had lower flux for both MF and UF. The chemical, physical and sensory properties of apple juices from MF and UF membranes were similar and changes during storage were comparable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1998.tb17912.x
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  • 7
    Electronic Resource
    Electronic Resource
    Temporal coherent control in the photoionization of Cs2: Theory and experiment (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 108 (1998), S. 4862-4876 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Two identical femtosecond pulses are used to create a coherent superposition of two vibrational wave packets in a bound electronic state of cesium dimers. The oscillations of these two wave packets are further detected after photoionization of the system. Quantum interferences between the two wave packets result in a temporal coherent control of the ionization probability. The interferogram exhibits the following features as a function of the time delay between the two laser pulses: high-frequency oscillation corresponding to Ramsey fringes (at the Bohr frequency of the transition) modulated by a slow envelope corresponding to the oscillations of vibrational wave packets (vibrational recurrences). Here the control parameter is the time delay between the two laser pulses which can be used to control the preparation of a wave packet in a quantum system and monitor its evolution. The detailed theory of this experiment is presented and compared with the pump-probe experiment. The temporal coherent control experiment is performed in the B state of Cs2, at 768 nm, with 150 fs pulses. We finally analyze quantitatively and discuss the effects of a thermal distribution of initial states on the temporal coherent control signal.© 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.475896
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  • 8
    Electronic Resource
    Electronic Resource
    Dynamic properties of dioctanoyl peroxide guest molecules constrained within the urea tunnel structure: A combined incoherent quasielastic neutron scattering and solid state 2H nuclear magnetic resonance investigation (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 109 (1998), S. 4078-4089 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The dynamic properties of dioctanoyl peroxide guest molecules within the urea host tunnel structure in the dioctanoyl peroxide/urea inclusion compound have been investigated by incoherent quasielastic neutron scattering (IQNS) and solid state 2H nuclear magnetic resonance (NMR) techniques. The IQNS investigations were carried out on samples of urea inclusion compounds containing perdeuterated urea to ensure that the incoherent scattering is dominated by the dioctanoyl peroxide guest molecules. Using semioriented polycrystalline samples, translational motions of the guest molecules along the tunnel were investigated separately from reorientational motions of the guest molecules about the tunnel axis. The 2H NMR experiments used dioctanoyl peroxide deuterated selectively in both the α CD2 groups and urea with natural isotopic abundance. The dynamic models that have been found to describe the translational and reorientational motions of the guest molecules from the IQNS and 2H NMR data are discussed in detail. The reorientational dynamics of the guest molecules about the tunnel axis can be described by a model of uniaxial rotational diffusion in a twofold potential, and the translations of the guest molecules along the tunnels can be interpreted by a model of translational jumps between sites with unequal probabilities of occupation. These models differ markedly from those found previously to describe the dynamic properties of alkane guest molecules within the urea tunnel structure. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.477008
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  • 9
    Electronic Resource
    Electronic Resource
    Reply A Roman “implant” reconsidered (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 394 (1998), S. 534-534 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Crubézy et al. reply — We disagree with Becker's view that the dental implant described in our earlier Scientific Correspondence is a natural canine stained with iron oxides. The dental implant was located in a position normally taken by the upper second right ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/28982
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  • 10
    Electronic Resource
    Electronic Resource
    Cortical feedback improves discrimination between figure and background by V1, V2 and V3 neurons (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 394 (1998), S. 784-787 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A single visual stimulus activates neurons in many different cortical areas. A major challenge in cortical physiology is to understand how the neural activity in these numerous active zones leads to a unified percept of the visual scene. The anatomical basis for these interactions is the dense ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/29537
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