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  • Analytical Chemistry and Spectroscopy  (1)
  • Industrial Chemistry  (1)
  • 1990-1994
  • 1965-1969  (2)
  • 1969  (2)
Document type
Keywords
Publisher
Years
  • 1990-1994
  • 1965-1969  (2)
Year
  • 1
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An einer Kolbenpumpe mit Acrylglas-Zylinder wird das Verhalten der Ventile ohne Kavitation und bei verschiedener Stärke der Dampfblasenbildung beobachtet und anhand von Ventilhub- und Druckabfallkurven diskutiert. Die Ergebnisse werden mit stationären Messungen verglichen. Es zeigt sich, daß bei nichtkavitierendem Pumpenbetrieb der Druckabfall im Saugventil aus den bei stationärer Strömung gemessenen Verlustbeiwerten ζv = f (Re) berechnet werden kann. Abschließend werden die Auswirkungen verschiedener Kavitationszustände auf das Betriebsverhalten der Pumpe beschrieben und Maßnahmen zur Vermeidung schädlicher Kavitation genannt.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 781-790 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: While heterolysis of oxonium ions generated upon electron-impact in the mass spectrometer is a well documented phenomenon in the fragmentation of aliphatic ethers, little analogy exists for structurally comparable immonium ions. Exceptions are ions of the latter class in which dissociation is facilitated by the presence of proper substituents in position allowing satabilization of daughter ions. Two main types of subtitution were explored providing(1) resonance stabilization of the product ions by aryl substituents in benzylic,heterolysis,and (2) aryl neighboring group participation in homobenzylic heterolysis, possibly yielding phenonium ions (or isometric ions via further rearrangement) as stable products in the gas phase. In the discussion emphasis will be placed on Case 2.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
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