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  • Chemical Engineering  (1)
  • PACS. 74.25.Gz Optical properties – 74.70.Ad Metals; alloys and binary compounds (including A15, Laves phases, etc.)  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Optical measurements of the superconducting gap in MgB 2 (2001)
    Springer
    The European physical journal 21 (2001), S. 159-161 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 74.25.Gz Optical properties – 74.70.Ad Metals; alloys and binary compounds (including A15, Laves phases, etc.)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Far-infrared reflectivity studies on the polycrystalline intermetallic compound MgB2 with a superconducting transition temperature T c = 39 K were performed at temperatures 20 K to 300 K. We observe a significant raise of the superconducting-to-normal state reflectivity ratio below 70 cm -1 , with a maximum at about 25-30 cm -1 , which gives a lower estimate of the superconducting gap of 2Δ(0) ≈ 3-4 meV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510170191
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Turbulent dispersion of aqueous drops in organic liquids (1987)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 987-995 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Drops sizes for turbulent dispersion of aqueous solutions in organic liquids were determined and correlated for three types of dispersion devices: small-diameter tubes, motionless mixer units, and a rotating annular disperser with Couette flow. Empirical correlation based on dimensional analyses were useful for application of these devices to gel-sphere processes. The results support the Kolmorogoff theory of turbulence as a dispersion mechanism for a range of 104 for the rate of energy dissipation.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690330611
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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