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  • 1985-1989  (4)
  • 1935-1939
  • 1930-1934
  • 85.70  (2)
  • Butyrolactones  (1)
  • Sall-angleneutronscattering (SANS)  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Ordered HGMS filters in the transverse configuration (1987)
    Springer
    Applied physics 44 (1987), S. 161-166 
    Details
    ISSN: 1432-0630
    Keywords: 85.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A numerical solution for the Navier-Stokes equation is obtained for the flow conditions in an ordered high-gradient magnetic filter. Hence, capture efficiencies are calculated for this filter operated in the transverse configuration, with field, flow, and collector-wire axis mutually perpendicular. Good agreement with experiment is obtained over a wide range of filter parameters. Comparisons are made with results obtained by other models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00626418
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Particle accumulation on a single wire in transverse HGMS configuration (1987)
    Springer
    Applied physics 42 (1987), S. 117-124 
    Details
    ISSN: 1432-0630
    Keywords: 85.70 ; 41
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract An experimental investigation of particle accumulation on a single wire in the transverse HGMS configuration is presented. For saturation buildup we obtain a monotonic decrease of the coefficient of static frictionf sat with the flow velocityv a on the basis of the “friction model”. The power law of the dependence of the saturation accumulation area onv a , predicted by this model, is experimentally verified. Furthermore, we present an empirical law describing the dependence of the accumulation area on timeτ and on flow velocityv a for the entire buildup process. From the investigation of the initial accumulation we conclude that existing theories of the so-called capture radius do not satisfactorily describe the situation near the end of a capture wire.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616720
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Small-angle neutron scattering on shear-induced micellar structures (1989)
    Springer
    Colloid & polymer science 267 (1989), S. 818-824 
    Details
    ISSN: 1435-1536
    Keywords: Sall-angleneutronscattering (SANS) ; shear-inducedphasetransition ; orientedmicelles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Small-angle neutron scattering (SANS) experiments on sheared aqueous surfactant solutions of tetradecyltrimethylammoniumsalicylate (TTMA-Sal) are reported. A5-mM-solution without shear shows a weak correlation peak at a momentum transfer of 0.09 nm−1 which has its origin in the micellar interaction. For shear rates above a threshold value of Γ=40 s−1 the scattering pattern shows an irregular increase in anisotropy. The analysis of the anisotropic pattern reveals the existence of two types of micelles: Small rodlike micelles which are weakly aligned and very large rodlike aggregates which are strongly aligned and which are present above the threshold value ofΓ. The two micelles are in equilibrium with each other and the equilibrium shifts with increasing shear rate to the side of the large oriented micelles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410121
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and Biological Activity of α-Methylene-γ-butyrolactonesDedicated to Dr. Wilhelm A. Schuler on the occasion of his 70th birthday (1985)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 24 (1985), S. 94-110 
    Details
    ISSN: 0570-0833
    Keywords: α-Methylene-γ-butyrolactones ; Butyrolactones ; Lactones ; Natural products ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: α-Methylene-γ-butyrolactones [dihydro-3-methylene-2(3H)furanones] constitute an important group of natural products and possess wide-ranging biological activities. Progress in the synthesis of the heterocycle and the classification of the synthetic methods are not only of practical interest, but also fundamentally important as a current example for the construction of an unusual 1,4-functionality distance and an α-substituted acrylic ester moiety which is susceptible to nucleophilic attack.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.198500941
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    Paper (German National Licenses)
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