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  • Inorganic Chemistry  (1)
  • METEOROLOGY AND CLIMATOLOGY  (1)
  • 2005-2009
  • 1970-1974
  • 1950-1954  (2)
  • 1951  (2)
Collection
Keywords
Publisher
Years
  • 2005-2009
  • 1970-1974
  • 1950-1954  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Untersuchungen über die quantitative ramanspektroskopische Bestimmung des γ-Isomeren in technischen Hexachlorcyclohexanen (1951)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 266 (1951), S. 193-207 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Bedeutung der Insektizide verlangt eine genaue Kontrolle der technisch gewonnenen Substanzen. Da das Gammexan bei seinem Herstellungsprozeß im Gemisch mit mehreren Isomeren anfällt, wird die rein chemische Kontrolle der Zusammensetzung des anfallenden Produktes schwierig. Ramanspektroskopisch lassen sich gute Analysenwerte erhalten, wenn die Substanzen gut gereinigt sind und besondere Filter zur Unterdrückung des kontinuierlichen Untergrundes in den Spektren angewendet werden. Im folgenden werden zwei Reinigungsverfahren für technische Hexachlorcyclohexane, sowie Zusatzfilter auf Kupfertetramminsulfatbasis beschrieben, die das ausgestrahlte Kontinuum der Quecksilberlampe weitgehend absorbieren und so gut auswertbare Spektren zur quantitativen Bestimmung des γ-Isomeren liefern.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19512660405
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Meteorological Analysis of Icing Conditions Encountered in Low-Altitude Stratiform Clouds (1951)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Liquid-water content, droplet size, and temperature data measured during 22 flights in predominatly stratiform clouds through the 1948-49 and the 1949-50 winters are presented. Several icing encounters were of greater severity than those previously measured over the same geographical area, but were within the limits of similar measurements obtained over different terrain within the United States. An analysis of meteorological conditions existing during the 74 flights conducted for four winters indicated an inverse relation of liquid-water concentration to maximum horizontal extent of icing clouds. Data on the vertical extent of supercooled clouds are also presented. Icing conditions were most likely to occur in the southwest and northwest quadrants of a cyclone area, and least likely to occur in the southeast and northeast quadrants where convergent air flow and lifting over the associated warm frontal surface usually cause precipitation. Additional data indicated that, icing conditions were usually encountered in nonprecipitating clouds existing at subfreezing temperatures and were unlikely over areas where most weather observing stations reported the existence of precipitation. Measurements of liquid-water content obtained during 12 flights near the time and location of radiosonde observations were compared with theoretical values. The average liquid-water content of a cloud layer, as measured by the multicylinder technique, seldom exceeded two-thirds of that which could be released by adiabatic lifting. Local areas near the cloud tops equaled or occasionally exceeded the calculated maximum quantity of liquid water.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: NACA-TN-2306
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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