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  • Electronic Resource  (12)
  • 1985-1989  (12)
  • 1890-1899
  • 1
    Electronic Resource
    Electronic Resource
    In situ resistance of Y1Ba2Cu3Ox films during anneal (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 157-159 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Measurements of electrical resistance of thin films of the high-temperature superconductor Y1Ba2Cu3Ox have been carried out between 100 and 800 °C, and in the range between roughly 0.1 and 1 atm of ambient oxygen. Results are reported for both quick and slow heating, and also for sudden changes in oxygen partial pressure. At constant temperature we observe that the response to the oxygen partial pressure is both quick and reversible. We show evidence that quick heating is preferable, and we also observe features in the resistance similar to those reported in bulk samples and interpreted as an order–disorder transition of oxygen in the one-dimensional Cu-O chains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99037
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical study of entrained soliton motion in long Josephson junctions (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 1132-1134 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present the results of numerical simulations of entrainment by microwaves of a soliton in Josephson junctions of both the overlap and in-line geometries. The computation was based on the full partial differential equations with boundary conditions, making no use of perturbation theory or Fourier expansion. We confirm the perturbation prediction for the range of phase lock for overlap junctions, but we observe a major departure for the in-line geometry, due to soliton creation and annihilation. Outside the range of entrainment, the perturbation predictions are not reliable in either case: we observe quasiperiodicity, intermittency, or chaotic creation and annihilation, depending on junction geometry and parameter values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101679
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Experiments on soliton motion in annular Josephson junctions (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 1447-1454 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report here the results of an extensive experimental investigation of soliton dynamics in Josephson junctions of different annular geometries. The annular geometry is unique in that it allows for the study of undisturbed soliton motion as well as soliton–antisoliton collisons, since there are no boundary effects. We have successfully trapped a single soliton in an annular junction and found good agreement with perturbation theory at low soliton velocity, and evidence of departure from perturbation theory at higher velocity. We also discuss the observation of fine structure on the I-V curve for a single trapped soliton, and evidence linking the stability of the soliton to surface damping.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337324
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Flip-chip bonding with solder dipping (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1459-1460 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We report a simple technique for making flip-chip contacts. The equipment required, in addition to a small-scale photoresist clean room, is a beaker of molten solder.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138505
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The Role of Somatic Mutation of Immunoglobulin Genes in Autoimmunity (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Immunology 5 (1987), S. 85-108 
    Details
    ISSN: 0732-0582
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.iy.05.040187.000505
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Authors' reply (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 9 (1985), S. 0 
    Details
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2559.1985.tb02839.x
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  • 7
    Electronic Resource
    Electronic Resource
    Binding of manganese by Antarctic Phaeocystis pouchetii and the role of bacteria in its release (1987)
    Springer
    Marine biology 95 (1987), S. 481-487 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The growth of Antarctic Phaeocystis pouchetii and associated bacteria in culture, and the binding and release of manganese were investigated using cultures derived from three clonal isolates collected from Prydz Bay, Antarctica, in November and December 1982. The cultured strains accumulated manganese from the culture medium. The concentration of Mn2+ in the alga was up to 58 times that of the medium. The Mn2+ apparently binds to the mucilage secreted by the cells and gives the alga its characteristic brown colour. Oxidation or complexing of Mn2+ by P. pouchetii was also indicated. Bacterial growth on the mucilage is inhibited in rapidly growing cultures by acrylic acid produced in the mucilage. Once the growth of P. pouchetii and production of ccrylic acid slow, bacterial numbers increase, leading to the solubilization of the mucilage and the release of Mn2+. In cool-temperate, subpolar and polar seas where P. pouchetii may form dense blooms, the binding and subsequent release of manganese may have important consequences for competing phytoplankton.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409577
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    The formation of controlled-porosity membranes from anodically oxidized aluminium (1989)
    [s.l.] : Nature Publishing Group
    Nature 337 (1989), S. 147-149 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] When aluminium is anodized in certain acid electrolytes, a porous oxide develops which exhibits a remarkably uniform array of cells, each containing a cylindrical pore6 (Fig. la). During growth at constant voltage, the barrier-layer thickness remains constant because the electric field oxidizes ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/337147a0
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Baddeleyite-zircon relationships in coronitic metagabbro, Grenville Province, Ontario: implications for geochronology (1988)
    Springer
    Contributions to mineralogy and petrology 100 (1988), S. 291-299 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract In the high grade gneiss terranes of the Grenville Province in Ontario, metagabbro with silicate coronas around primary olivine and Fe-Ti oxide contains trace amounts of both baddeleyite and zircon. Single baddeleyite crystals with radiating columnar coronas of polycrystalline zircon, in places with outer rims of garnet, are analogous to the coronas around olivine and ilmenite. Single crystals of zircon and baddeleyite without zircon coronas also occur in the same rocks. Both zirconium minerals have been isotopically dated at three widely separated localities. In each case baddeleyite records an igneous crystallization age of ca.1170 Ma, 125 Ma older than the ca.1045 Ma age of the zircons, interpreted to be the age of metamorphism. These data agree well with U-Pb ages obtained from other rocks in the same region and refute the alternative interpretation that silicate coronas in these metagabbros formed during cooling following magmatic crystallization. The age does not support direct correlation with diabase dykes of either the Sudbury or Abitibi swarms northwest of the Grenville Front.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379740
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    A mathematical model for the growth of bacterial microcolonies on marine sediment (1987)
    Springer
    Microbial ecology 13 (1987), S. 31-45 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Counts of bacterial microcolonies attached to deep-sea sediment particles showed 4-, 8-, 16-, and 32-celled microcolonies to be very rare. This was investigated with a mathematical model in which microcolonies grew from single cells at a constant growth rate (μ), detached from particles at constant rate (λ), and reattached as single cells. Terms for attachment of foreign bacteria (a) and death of single cells (d) were also included. The best method of fitting the model to the microcolony counts was a weighted least-squares approach by whichλ(0.83 hour−1) was estimated to be about 20 times greater thanμ(0.038 hour−1). This showed that the bacteria were very mobile between sediment particles and this mobility was explained in terms of attachment by reversible sorption. The implications of the results for the frequency of dividing cell method for estimating growth rates of sediment bacteria are discussed. The ratio ofλ andμ was found to be very robust both in terms of the errors associated with the microcolony counts and the range of microcolony sizes used to obtain the solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02014961
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