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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical & engineering data 22 (1977), S. 49-50 
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical & engineering data 22 (1977), S. 51-54 
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 191 (1961), S. 1292-1292 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Colorimetric readings in presence of: Expo- Methyl ethyl n- n- Diace- sure alco- alco- propyl butyl tone Ace- (min.) Blank hoi hoi alco- alco- alco- tone Dioxan Ether hoi hoi hoi 0 338 338 338 337 338 337 338 338 337 5 126 313 330 335 337 330 335 337 334 10 65 310 327 333 335 328 ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 188 (1963), S. 59-61 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Ultraschallbestrahlung mit einemMullard-Generator und Bariumtitanatkristall als Übertrager (1 MHz) diente zur Beobachtung der Entfärbung wäßriger Bromkresolgrünlösungen. Die mikroskopischen Adsorptionskurven zeigen das Verschwinden der Farbe mit der Zeit an. Gegenwart geringer Beträge von Äthylalkohol, n-Propylalkohol, n-Butylalkohol, Diaceton, Alkohol und Aceton stoppen die Verfärbung. Ursache scheint Kavitation zu sein.
    Notes: Summary Ultrasonic radiations from aMullard generator with barium titanate crystal as transducer having a frequency 1 Mc/sec, have been used to study the decolorization of an aqueous solution of bromocresol green. Absorption curves obtained from spectrophotometric data demonstrate the fading of the colour of the dyestuff with the time of exposure. The presence of small amount of ethyl alcohol, n-propyl alcohol, n-butyl alcohol, diacetone alcohol and acetone separately inhibit the fading. Cavitation seems to be the cause of decolorization.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 175 (1961), S. 50-53 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Ultraschallbestrahlung von einemMullard-Generator mit Bariumtitanat-Kristallen als Schallgeber (Frequenz 1 MHz; 225 W/cm2 als Strahlungsleistung) wurde angewandt, um die Entfärbung von wäßrigen Lösungen aus Brillantgrün zu untersuchen. Die erhaltenen Adsorptionskurven aus spektrometrischen Daten zeigen das Verschwinden des Farbstoffs mit wechselnder Zeit der Bestrahlung. Die Reaktion ist unimolekular, und die mittleren Geschwindigkeitskonstanten sind 0,739, 0,452 und 0,365 für die Konzentrationen 0,0064, 0,0096 und 0,0128 g/l. Die Anwesenheit geringer Beträge von Äthylalkohol unterbindet die Entfärbung. Gravitation und Oxydation, verursacht durch die Gegenwart von Spuren aktivierten Sauerstoffs aus der gelösten Luft, scheinen die Ursache für die Entfärbung zu sein.
    Notes: Summary Ultrasonic radiations from aMullard generator with barium titanate crystal as transducer having a frequency 1 MC/sec. and power output 225 W/sq. cm. have been used to study the decolourisation of aqueous solutions of brilliant green dye. Absorption curves obtained from spectrophotometric data demonstrate the fading of the colour of the dyestuff with the time of exposure. The reaction has been found to he unimolecular and average velocity constants are 0.739, 0.452 and 0.365 for concentrations 0.0064, 0.0096 and 0.0128 g./l. respectively. The presence of small amount of ethyl alcohol inhibits the fading. Cavitation and oxidation due to the presence of some activated oxygen from the dissolved air seem to be the cause of fading.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 187 (1963), S. 53-56 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Ultraschallbestrahlung (1 MHz, 225 W/cm2) erlauben die Untersuchung der Entfärbung von wä\riger Safranin-O-Lösung. Die erhaltenen spektrometrischen Daten zeigen das Verschwinden der Farbe im Laufe der Zeit. Diaceton-Alkohol, n-Propyl-, n-Butyl- und äthylalkohol, Dioxan und äther verhindern die Entfärbung. Wasserstoffperoxid beschleunigt sie nicht. Die Farbstoffmoleküle werden offensichtlich durch Kavitation abgebaut.
    Notes: Summary Ultrasonic radiation from Mullard generator with barium titanate crystal as transducer having a frequency of 1 Mc/sec and power output 225 w/sq. cm. have been used to study the decolorization of aqueous solution of safranine O. Absorption curves obtained from spectrophotometric data demonstrate the fading of the colour of the dyestuff with the time of exposure. Diacetone alcohol, n-propyl alcohol, n-butyl alcohol, ethyl alcohol, dioxan and ether inhibit the decolorization. Hydrogen peroxide does not help the decolorization. Cavitation is responsible for breaking the molecules of the dye.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica 32 (1979), S. 193-196 
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 38 (1968), S. 130-136 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: High frequency ultrasonic waves of frequency 1 Mc/s. have been employed to study the decolourization of dilute aqueous solution of crystal violet. The process is irreversible and the kinetic study shows it to be unimolecular one. The deaeration of the solution by nitrogen does not affect the rate of the decolourization. The addition of certain substances such as alcohol, acetone, ether, glycerine, dioxan and allylthiourea inhibits the decolourization to a considerable extent. Oxidation and subsequent destruction of the dye molecule has been found to be the cause of the fading of the dye solution.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Publication Date: 1979-03-01
    Print ISSN: 0001-5970
    Electronic ISSN: 1619-6937
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 10
    Publication Date: 1963-01-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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