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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 57 (1993), S. 203-206 
    ISSN: 1432-0630
    Keywords: 74.40+k ; 74.70.Vy ; 78.47.+p
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We present a detailed investigation of the dynamics of laser-excited quasiparticles in YBa2Cu3O7 thin films below the critical temperature. Reflectivity transients at low temperature trace the generation and recombination behavior of quasiparticles. The quasiparticle cascading and recombination rates are determined by comparison with a detailed nonlinear model of the quasiparticle dynamics based on extended Rothwarf-Taylor equations.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 102-106 
    ISSN: 1618-2650
    Keywords: Analyse von Barbituraten ; Diasolyse ; gequollene Silicongummimembran
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein Gerät zur Diasolyse (Flüssig-flüssig Extraktion mit phasentrennender Membran) wird beschrieben, bei dem ein Silicongummischlauch als Membranmaterial dient. Der Einfluß einer Reihe von Parametern wurde untersucht (Pumpgeschwindigkeit, Schlauchlänge, Temperatur, pH, Volumen der wäßrigen Phase, Konzentration der zu bestimmenden Substanz, Quell- und Lösungsmittel, Fremdsubstanzen, kontinuierliche und diskontinuierliche Ausführung). Als Testsubstanzen wurden Barbiturate verwendet. Die Methode eignet sich zur Trennung von lipophilen und lipophoben Stoffen sowie zur Spurenanreicherung.
    Notes: Abstract An apparatus for diasolysis (liquid-liquid extraction with phase separation by membranes) is described, which employs silicone rubber tubes as membrane material. The effect of various parameters has been investigated (pumping rate, tube length, temperature, pH, volume of aqueous phase, concentration of substance to be determined, swelling agent, solvent, foreign substances, continuous and discontinuous mode of operation). Barbiturates served as testing substances. The method is suitable for the separation of lipophilic from lipophobic substances and also for the enrichment of traces.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 290 (1978), S. 33-39 
    ISSN: 1618-2650
    Keywords: Analyse von FettsÄuren und DDT ; Diasolyse ; gequollene Silicongummimembran
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die früher beschriebene Diasolyse-Apparatur wird verwendet, um FettsÄuren und DDT aus wÄ\rigen Lösungen zu extrahieren. DDT wird aus Bier, Milch und Spinat abgetrennt. Der Einflu\ des pH-Wertes, des Verteilungskoeffizienten, des Diffusionsverhaltens und der Zusammensetzung der wÄ\rigen Phase wird diskutiert.
    Notes: Summary The apparatus for diasolysis (described earlier) is used for the extraction of fatty acids and DDT from aqueous solutions. DDT is separated from beer, milk and spinach. The influences of pH, partition coefficient, diffusion behaviour and composition of the aqueous phase is discussed.
    Type of Medium: Electronic Resource
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