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  • Articles: DFG German National Licenses  (5)
  • 1990-1994  (1)
  • 1985-1989  (4)
  • 1975-1979
  • 1960-1964
  • 1993  (1)
  • 1985  (4)
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  • Articles: DFG German National Licenses  (5)
Material
Years
  • 1990-1994  (1)
  • 1985-1989  (4)
  • 1975-1979
  • 1960-1964
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of engineering physics and thermophysics 48 (1985), S. 401-403 
    ISSN: 1573-871X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The results of an experimental investigation of the transition to film boiling of helium under stepped thermal loading, obtained in a wide range of pressures, are presented.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of engineering physics and thermophysics 48 (1985), S. 10-12 
    ISSN: 1573-871X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Results are presented from a study of the effect of saturation pressure on the nonsteady critical heat flux during the boiling of liquid helium in a large volume.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied spectroscopy 43 (1985), S. 1297-1301 
    ISSN: 1573-8647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Fluid dynamics 20 (1985), S. 818-819 
    ISSN: 1573-8507
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract It is well-known [1] that two coaxial rings which are moving in the same direction pass through each other alternately. In the case of thin vortex rings this phenomenon was first considered qualitatively in [2]. The assumption that the vortex rings are thin means that when their interaction is considered they can be assumed to be annular vortex filaments. In the present paper, on the basis of the approach suggested in [2], certain new properties are determined for a system of two coaxial vortex rings of the same intensity.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0044-2313
    Keywords: Bis[triglymesodium(1+)][Tetrakis(borane)sulfate(2-)], [Na · Triglyme]2[S(BH3)4] ; preparation ; crystal structure ; SCF calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: [Na · Triglyme]2[S(BH3)4]: a Salt of the New Anion Tetrakis(borane)sulfate(2- ). Crystal Structure and Theoretical Investigation of the StructureNa[H3B-m̈2-S(B2H5)] 1 is produced by the reaction between NaSH and THF · BH3, under dehydrogenation. 1 is also formed as the first 11B-NMR-spectroscopically detectable reaction product by the reaction between anhydrous Na2S and THF · BH3. Adducts of BH3 with the S2- ion are not detectable in THF. The anion [S(BH3)4]2- can however be obtained, by the addition of NaBH4 to 1 in diglyme or triglyme respectively: [Na  -  Triglyme]2[S(BH3)4] 2. 2 crystallizes in the monoclinic space group P21/n (Nr. 14). Structural data of 1 and 2 have been calculated by SCF methods. The anion of 2 may be viewed either as an adduct of B2H6 with S2-, or as a bridge substituted thia derivative of B2H7-; furthermore the anion of 2 is isoelectronic and isostructural with the SO42- ion.
    Notes: Bei der Reaktion zwischen NaSH und THF · BH3 entsteht unter H2-Abspaltung Na[H3B-m̈2-S(B2H5)] 1. 1 entsteht auch als erstes 11B-NMR-spektroskopisch nachweisbares Reaktionsprodukt bei der Reaktion zwischen wasserfreiem Na2S und THF · BH3. Addukte von BH3 an das S2--Ion lassen sich in THF als Lösungsmittel nicht nachweisen. Das neue Anion [S(BH3)4]2- kann jedoch durch Addition von NaBH4 an 1 in Diglyme bzw. Triglyme erhalten werden: [Na · L]2[S(BH3)4] 2. 2 kristallisiert monoklin in der Raumgruppe P21/n (Nr. 14). Aus SCF-Rechnungen erhielten wir die Strukturparameter für 1 und 2. Das Anion von 2 kann sowohl als Addukt von B2H6 an S2- als auch als brückensubstituiertes Thia-Derivat des B2H7--Ions aufgefaßt werden; ferner ist es isoelektronisch und isostrukturell mit dem SO42-- Ion.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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