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  • Inorganic Chemistry  (2)
  • FLUID MECHANICS AND HEAT TRANSFER  (1)
  • 1950-1954  (3)
  • 1930-1934
  • 1920-1924
  • 1915-1919
  • 1910-1914
  • 1952  (3)
Collection
Keywords
Publisher
Years
  • 1950-1954  (3)
  • 1930-1934
  • 1920-1924
  • 1915-1919
  • 1910-1914
Year
  • 1
    Electronic Resource
    Electronic Resource
    Der Einfluß von Katalysatoren auf den Verlauf der Friesschen ReaktionDiese Arbeit ist wie die vorstehende Herrn Geheimrat Professor Dr. H. Wieland zu seinem 75. Geburtstag gewidmet. (1952)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 85 (1952), S. 585-590 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden die gebräuchlichsten katalysatoren zur Einleitung einer Friesschen Reaktion sowie einige bisher nicht benutzte Halogenide und Organometallhalogenide auf ihre Wirksamkeit untersucht. Es zeigt sich, daß bei Umlagerungen von α-Naphthylacetat in Nitrobenzol als Lösungsmittel die erzielte Ausbeute und auch die Richtung der Isomerisierung vom benutzten Metallhalogenid abhängt. Bei Umlagerungen ohne Lösungsmittel werden dagegen nur die Ausbeuten an Oxyketon beeinflußt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19520850614
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Über die monokline Modifikation des basischen Berylliumacetats (1952)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 270 (1952), S. 298-300 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus heißer Lösung in Tetralin kristallisiert basisches Berylliumacetat Be4O(CH3COO)4 in Form von gut ausgebildeten, doppelbrechenden Prismen. Diese haben das gleiche monokline Gitter wie das sublimierte Berylliumacetat. Bei Raumtemperatur gehen sie langsam in die reguläre Form über.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19522700504
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    Paper (German National Licenses)
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  • 3
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    Preliminary Results of Cyclical De-Icing of a Gas-Heated Airfoil (1952)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An NACA 65(sub 1)-212 airfoil of 8-foot chord was provided with a gas-heated leading edge for investigations of cyclical de-icing. De-icing was accomplished with intermittent heating of airfoil segments that supplied hot gas to chordwise passages in a double-skin construction. Ice removal was facilitated by a spanwise leading-edge parting strip which was continuously heated from the gas-supply duct. Preliminary results demonstrate that satisfactory cyclical ice removal occurs with ratios of cycle time to heat-on period (cycle ratio) from 10 to 26. For minimum runback, efficient ice removal, and minimum total heat input, short heat-on periods of about 15 seconds with heat-off periods of 260 seconds gave the best results. In the range of conditions investigated, the prime variables in the determination of the required heat input for cyclical ice removal were the air temperature and the cycle ratio; heat-off period, liquid water content, airspeed, and angle of attack had only secondary effects on heat input rate.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NACA-RM-E51J29
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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