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  • 1985-1989  (5)
  • 1965-1969
  • 1988  (5)
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  • 1985-1989  (5)
  • 1965-1969
Year
  • 1
    Electronic Resource
    Electronic Resource
    Magnetically insulated ion diode with a gas-breakdown plasma anode (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 1872-1876 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An active anode plasma source has been developed for use in a magnetically insulated ion diode operated on a 1010-W pulsed power generator. This source uses an inductive voltage from a single turn coil to beak down an annular gas puff produced by a supersonic nozzle. The resulting plasma is magnetically driven toward the radial insulating magnetic field in the diode accelerating gap and stagnates at a well-defined surface after about 300 ns to form a plasma anode layer defined by magnetic flux surfaces. An ion beam is then extracted from this plasma layer by applying a 150-kV, 1-μs pulse to the accelerating gap. Optimization of the timing of the gas puff, the plasma production discharge, and the high voltage pulse has resulted in 1-μs duration 75–150-keV ion beam pulses with 〉100-A/cm2 peak ion current density over an area of about 400 cm2. Up to 5 J/cm2 has been collected by a 4-cm2 calorimeter. The diode impedance history can be varied so that rising, flat, and falling voltage pulse waveforms can be produced. Streak photographs of beamlets impinging on a scintillator and time integrated targets both show beam divergence angles ≤3°. However, under certain operating conditions, large excursions (∼25°) in mean aiming angle on time scales of 20–200 ns are observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339884
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mean aggregation number and water vapor pressure of AOT reverse micellar systems determined by controlled partial pressure-vapor pressure osmometry (CPP-VPO) (1988)
    s.l. : American Chemical Society
    Langmuir 4 (1988), S. 653-655 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00081a026
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Distribution of EGF receptor expressing and DNA replicating epidermal cells in psoriasis vulgaris and Bowen's disease (1988)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 119 (1988), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have examined the localization of DNA replicating cells and EGF receptor-expressing cells in the epidermis of psoriasis vulgaris, a benign hyperproliferative skin disease, and Bowen's disease, a pre-malignant hyperproliferative skin disease, and normal skin. DNA replicating cells were detected by anti-BrdU monoclonal antibody after incubating tissue sections with BrdU, and EGF receptors were detected by the anti-EGF receptor monoclonal antibody B4G7. In normal skin, DNA replicating cells were localized exclusively in the basal and suprabasal layers. EGF receptor expression was observed most strongly in the basal and parabasal layers, but diminished gradually towards the upper squamous layer. In psoriatic skin, DNA replicating cells were also localized in the basal and parabasal layers, but the number of these mitotic cells was about 10 times higher than in normal skin. In this case, more EGF receptors were detected in all viable layers of the epidermis. Apparently normal skin adjacent to psoriasis lesions showed persistent expression of EGF receptors in the upper squamous layer without an increased number of DNA replicating cells in the basal and parabasal layers. In Bowen's disease, DNA replicating cells and EGF receptor expressing cells were distributed in all layers of the epidermis. These findings indicate that the increased production of EGF receptors may be, in part, responsible for the hyperproliferative state of the epidermis and that cells in the upper squamous layer of psoriasis may have lost a mechanism by which EGF receptor expression is diminished thus allowing differentiation. This altered process of EGF receptor production may be involved in the onset of psoriasis vulgaris.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.1988.tb03480.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Preparation and crosslinking of oligoesterified woods based on phthalic anhydride and glycidyl methacrylate (1988)
    Springer
    Wood science and technology 22 (1988), S. 335-344 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Oligoesterification reaction of wood with phthalic anhydride and glycidyl methacrylate (GMA) was investigated. The reaction proceeded smoothly at 90°C. The products obtained consisted of acetone-insoluble and soluble parts. The insoluble parts were novel oligoesterified woods with oligoester chains having methacrylate double bonds. The soluble parts were viscous liquids consisting mainly of free oligoesters not linked with the wood matrix, and contained small amounts of GMA and oligoesterified wood components which were dissolved out. The products (the oligoesterified wood-containing mixtures), when subjected to hotpressing, gave plasticized crosslinked wood boards whose surfaces are smooth, glossy, and plasticlike. In this case, plasticization of wood components and thermal polymerization of the methacrylate double bonds in the oligoester chains occurred simultaneously even in the absence of radical initiator. The soluble parts worked as a plasticizer for the wood components. The crosslinked wood boards exhibited outstanding properties in tensile strength (∼ca. 700 kg/cm2), flexural strength (ca. 900–1030 kg/cm2), and Rockwell hardness (ca. 120).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00353323
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation and crosslinking of oligoesterified woods based on maleic anhydride and allyl glycidyl ether (1988)
    Springer
    Wood science and technology 22 (1988), S. 21-32 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Oligoesterification of wood was investigated by alternately adding esterification reactions of wood with maleic anhydride and allyl glycidyl ether. The products obtained consisted of acetone-insoluble and soluble parts. The insoluble parts were novel oligoesterified woods with oligoester chains having polymerizable double bonds. The oligoester chain length showed a tendency to decrease with increase in wood content in feed. The soluble parts were free oligoesters which were not linked with the wood matrix. The products (the oligoesterified wood-containing mixtures), when subjected to hot-pressing in the presence of a peroxide, gave plasticized crosslinked wood boards whose surfaces are smooth, glossy, and plasticlike. In this case, the free oligoesters which were hardening worked as a plasticizer for the wood components and were combined, by the crosslinking, with the oligoesterified woods, resulting in the formation of the network structure. The crosslinked wood boards exhibited outstanding properties in heat distortion temperature (〉165°C) and compressive strength (ca. 1,600–2,300 kg/cm2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00353225
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    Paper (German National Licenses)
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