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  • 1960-1964  (1)
  • 1955-1959  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 49 (1961), S. 415-419 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Gemische von je etwa 200μg Carbonsäuren lassen sich durch stufenweise Elution aus Mikrosäulen von Ionenaustauscherharzen fraktionieren. Die Eluatfraktionen werden nacheinander auf Filterpapier gesammelt und dann papierchromatographisch weiter getrennt. Mit Hilfe dieses Verfahrens gelang es gut, die Komponenten eines aus 12 Säuren bestehenden Gemisches zu identifizieren.
    Abstract: Résumé On peut fractionner des mélanges d'acides carboxyliques, contenant environ 200μg de chaque acide, par élution graduelle sur des microcolonnes de résines échangeuses d'ions. Les fractions sont successivement recueillies sur papier filtre et séparées ensuite par chromatographie sur papier. Par cette méthode, on a identifié rapidement les constituants d'un mélange de douze acides.
    Notes: Summary Mixtures of carboxylic acids, containing about 200μg of each, may be fractionated by gradient elution from micro-columns of ion-exchange resins. The fractions are collected successively on filter paper and further separated by paper chromatography. Using this method the components of a mixture of twelve acids were readily identified.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE of the most marked characteristics of the radio signals received from the Earth satellites has been the complex fading of the received signal. It is here shown that from a study of the fading it is possible to deduce the electron content for the sample of the ionosphere between the satellite ...
    Type of Medium: Electronic Resource
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