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  • Aktivierungsanalyse, Neutronen  (1)
  • Chemistry  (1)
  • FITC-fluorescein 5′-isothiocyanate-Na+,K+-ATPase  (1)
  • 1
    ISSN: 1573-4994
    Keywords: Fluorescence spectra ; fluorescence decay ; dissociation constants ; fluorescein 5′-isothiocyanate ; FITC-fluorescein 5′-isothiocyanate-Na+,K+-ATPase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fluorescence emission intensity between the Na+, and the K+ complex of Na+,K+-ATPase, labeled with fluorescein 5′-isothiocyanate (FITC), differs by 30 to 40%. Experimental studies are carried out to elucidate the physical reasons which account this intensity difference. The dissociation constant of protolysis of the covalently bound FITC and its fluorescence decay times are determined in media of different ionic compositions and are compared with the corresponding properties of a synthetic model compound. The fluorophore bound to the protein is characterized by two decay times in the nanosecond range; the model compound, by a single one. The static fluorescence intensity changes are discussed on the basis of these results.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 263 (1973), S. 116-120 
    ISSN: 1618-2650
    Keywords: Best. von Quecksilber in Biolog. Material, Fisch ; Aktivierungsanalyse, Neutronen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Quecksilbergehlte in verschiedenartigen Fischproben und anderen biologischen Materialien wurden durch die Neutronenaktivierungsanalyse über das Hg-197 bestimmt. Ein in der Literatur beschriebenes Verfahren diente unter Ausnutzung der Flüchtigkeit von Quecksilber(II)-chlorid und der leichten elektrolytischen Abscheidbarkeit des Quecksilbermetalls der unumgänglichen Isolierung der Quecksilberaktivität. Die durch diese Methode nicht bewirkte, jedoch notwendige Abtrennung vom gewöhnlich anwesenden Au-198 wurde durch Verflüchtigung des Quecksilbers als Metall erreicht. Bedenklich hohe Gehalte an Quecksilber ließen sich in einigen japanischen Thunfischkonserven sowie in Weißfischen des Rheins nachweisen.
    Notes: Abstract Mercury contents in diverse samples of fish and other biological materials have been determined by neutron-activation analysis measuring the activity of Hg-197. A method described in literature was used for the indispensable separation of the mercury activity utilizing the volatility of HgCl2 and the low electric potential of deposition of mercury metal. The also required, by this method however not effected separation of Au-198 usually found in the irradiated materials was accomplished by volatilisation of the mercury metal at 850° C. Seriously high contents of mercury were found in some samples of Japanese canned tuna and in whitefish of Rhine river.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 73 (1961), S. 64-64 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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