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  • Articles  (4)
  • Chemistry  (4)
  • AERODYNAMICS
  • 1960-1964  (3)
  • 1905-1909  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Beiträge zur Kenntnis der Vanadinverbindungen (1907)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 52 (1907), S. 368-396 
    Details
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde eine bequeme Methode zur elektrolytischen Darstellung der Vanadisalze ausgearbeitet.Es wurde das elektromotorische Verhalten gelöster Vanadinsalze in verschiedenen Oxydationsstufen untersucht.Es wurde qualitativ das Verhalten der Vanadinsalze zu verschiedenen Oxydations- und Reduktionsmitteln, sowie zu Bikarbonatlösungen untersucht.Es wurde quantitativ die Reaktionsgeschwindigkeit zwischen Vanadi- und Silbersulfat, sowie der katalytische Einflufs von Eisen- und Kupfersalzen auf diese Reaktion untersucht.Bei Gegenwart von Kupfersalzen wird in dieser Reaktion eine Anfangsbeschleunigung beobachtet, die mit einer amorphen Ausscheidung des Silbers Hand in Hand geht.Es wurden die qualitativen Methoden zum Nachweis von Vanadi- und Vanadoverbindungen kritisch besprochen.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19070520133
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  • 2
    Electronic Resource
    Electronic Resource
    An experimental study of surface cooling by bubbles during nucleate boiling of water (1964)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 10 (1964), S. 656-660 
    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: By using a special surface thermocouple Moore and Mesler have measured large temperature fluctuations during nucleate boiling of water on chromel P surface. They found that the temperature dropped 20° to 30°F. in about 2 msec. but required 10 to 20 msec. to recover. They have postulated that the surface was cooled during initial bubble growth by evaporation of a microlayer into the bubble. To test this hypothesis a technique was developed to photograph a bubble growing from an artificial site as the surface temperature was measured.Temperature fluctuations were recorded on an oscilloscope which automatically triggered the bubble photographs by means of a time delay unit and flash tube. Photographs of bubbles were taken at 1 μsec. exposure time and ranged from about 10 μsec. after the start of the temperature drop to about 1 msec. before the start of another cycle. The photographs show that the surface cools during bubble growth and recovers during bubble departure.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690100516
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  • 3
    Electronic Resource
    Electronic Resource
    An apparatus for the determination of the minimum film temperature of polymer emulsions (1960)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 4 (1960), S. 81-85 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: An apparatus has been constructed for measurement of the minimum filming temperature (MFT) of a polymer emulsion. The apparatus consists of a metal bar along which a temperature gradient may be maintained. Recessed channels are provided in which emulsion samples are spread and allowed to dry. Eight thermocouple stations along the bar are connected to a continuous recorder. Following drying of the film, the minimum temperature at which a continuous film is formed is determined. Testing of the apparatus on one emulsion examined under a variety of conditions and on samples of varying composition has demonstrated the reliability, versatility, and utility of the apparatus.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1960.070041012
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  • 4
    Electronic Resource
    Electronic Resource
    The determination of surface properties of polymers from liquid drop stability on an inclined plane (1961)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 5 (1961), S. 240-245 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A method for studying the surfaces of solid polymers is described. Drops of various sizes were deposited on a horizontal surface; then the plane was tilted and the angles of inclination at which the drops begin to slide were recorded. A theory was developed which indicated that a plot of sin αs against V2/3- on linear graph paper should give a straight line. From the slope of the line, a constant K was obtained which characterized the surface. This constant is a function of the interfacial forces and the density of the drop. The critical surface tension for wetting Teflon (TFE) resin was found to be 20.5 dynes/cm. This is in close agreement with the critical surface tension determined by contact angle measurements. Alathon 23A polyethylene film which had been treated by electric corona discharge was studied. It was shown that K is related to the printability level, and that treated and untreated surfaces may readily be distinguished from one another by their K values.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1961.070051417
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