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  • 1
    Electronic Resource
    Electronic Resource
    Structure and magnetic moment of pyrrolidinium copper trichloride, a linear ferromagnet (1990)
    s.l. : American Chemical Society
    Inorganic chemistry 29 (1990), S. 2887-2888 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00341a006
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Isolation of sodium dependent variants from haploid soybean cell culture (1981)
    Springer
    Plant cell reports 1 (1981), S. 48-51 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Following ultraviolet mutagenesis, we have isolated two Na+ dependent variants from haploid suspension cultures of soybean cells. No selection was used in the isolation procedure. These cells cannot grow in 1 mM Na+ but can grow in 17 mM Na+. The strains also grow in 33 or 65 mM Na+, concentrations in which the parent cell line dies. [22Na] was used to measure the accumulation of Na+ by parent and variant cell lines. Two- to three-fold less Na+ is retained by the variant cell lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00269269
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Microwave properties of highly oriented YBa2Cu3O7-δ superconducting thin films (1991)
    Springer
    Journal of superconductivity 4 (1991), S. 253-257 
    Details
    ISSN: 1572-9605
    Keywords: YBa2Cu3O7 ; microwave properties ; R s
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We have performed millimeter-wave frequency (94 GHz) measurements on high-quality YBa2Cu3O7-δ superconducting films on yttrium-stabilized (100) ZrO2 and MgO substrates. The ∼0.2μm thin films fabricated by magnetron sputteringin situ with the YBa2Cu3O7-δ powders as target exhibit superconducting transition temperatures up to 88 K. The critical current density of 6×105 A/cm2 at 77 K and the X-ray diffraction spectrum as well as scanning electron microscope photographs indicate these thin films are fullyc-axis oriented, extremely high in density, and universally homogeneous. Millimeter-wave surface resistances have been measured on a hemisphere open resonator in the temperature range of 20 K toT c and beyond. The surface resistance at 94 GHz and 77 K for these films is found to be about 30 mΩ, nearly 1/4 that for copper, and a drop of two orders in the surface resistance within 4 K is observed, which indicates that these films are good materials for applications in the millimeter-wave range, especially for fabricating microwave devices. We observed such low surface resistance in these thin films due to the near absence of grain and phase boundaries coupled with a high degree of crystalline orientation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618145
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic behaviour and vortex lattice transition in YBa2Cu3O7−δ (1995)
    Springer
    Journal of superconductivity 8 (1995), S. 79-85 
    Details
    ISSN: 1572-9605
    Keywords: Susceptibility ; mixed state ; pinning ; structure vortex lattice transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Magnetic susceptibility measurements on YBa2Cu3O7−δ rod materials by an ac balanced bridge technique are made in fields of up to 50 mT and over the temperature range from 4.2 K to just belowT c . A largeH c2 accompanied by characteristic form of hysteresis has been shown. A modified critical state model of Anderson [Phys. Rev. Lett. 9, 309 (1962)] is adapted to fit the curves in the region where hysteresis is dominant because of flux trapping. A conceptual model of structure vortex lattice transition due to the intrinsic pinning of the layering configuration is suggested, which can provide an explanation of the magnetic behaviour of oxide superconductors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00732244
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  • 5
    Electronic Resource
    Electronic Resource
    Electromagnetic behavior of superconductors in a microwave field (1991)
    Springer
    Journal of superconductivity 4 (1991), S. 473-480 
    Details
    ISSN: 1572-9605
    Keywords: Oxide superconductors ; electromagnetic behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Our research on the surface impedance of superconductors in microwave, millimeter, and submillimeter wave frequency ranges has revealed the nature of the interaction between microwave and superconductors. The complete solution to the Mattis-Bardeen (MB) quadruple [Phys. Rev. 111, 412 (1958)] and the analytical simplification of the MB formula to a double integral have been given. The theoretical calculations for metallic superconductors (Al and Sn) are in excellent agreement with the typical experimental data [Biondi and Garfunkel,Phys. Rev. 116, 853 (1959); S. Sridhar,J. Appl. Phys. 65, 159 (1988)]. Whereas for oxide superconductors a new microscopic model has been suggested because of its distinctive electromagnetic behavior compared to that of conventional superconductors, we think that the nonlinear effect caused by the strong anisotropy in superconductivity is one of the reasons why oxide superconductors give an unusual response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00635867
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  • 6
    Electronic Resource
    Electronic Resource
    Analysis of whispering-gallery superconducting dielectric resonator modes (1991)
    Springer
    Journal of superconductivity 4 (1991), S. 227-231 
    Details
    ISSN: 1572-9605
    Keywords: Superconducting resonator ; whispering gallery modes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The whispering-gallery (WG) modes of a superconducting dielectric resonator (SDR) based on a sapphire cylindrical dielectric resonator and a YBa2Cu3O7 − δ shielding cylinder have been studied. A method for the determination of the resonant frequencies and the maximum quality factor of such modes is presented. Calculations have shown that most of the mode energy could be confined between the caustic surface of the WG modes provided the dimensions of the SDR are properly selected, and a magnitude of 109 forQ of the SDR could be estimated. A phenomenal explanation is given to account for such outstanding microwave behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00620791
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Porous kaolinite bead: A novel but economical solid support material for biomass in fluidised bed technology (1983)
    Springer
    Biotechnology letters 5 (1983), S. 85-88 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Porous kaolinite beads were prepared by mixing kaolinite with various proportions of rice hull ash (RHA) and heating in a furnace at 800 °C for five hours. Those with 10 to 60% (w/w) RHA were very porous and had good mechanical strength. The raw materials were inexpensive and their preparation relatively simple, therefore these porous kaolinite beads would be an excellent solid support matrix material for the utilization of biomass in biological fluidised bed (BFB) processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00132164
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