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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 228 (1980), S. 199-204 
    ISSN: 1434-4726
    Keywords: Air-bone gap ; Cancellation method ; Bone conduction calibration ; Masking
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary For a reliable detection of the bone conduction threshold blocking of the contralateral ear can be necessary but then the noise will affect the threshold in the test ear. To resolve this problem the cancellation method is used. The equalization of air and bone conduction sound level in the inner ear is very accurate, the relation between the intensities has been proved to be linear and independent of noise at the contralateral ear. An application for calibration of the bone conduction vibrator to the head phone is discussed. The benefit of the method for measuring an air-bone gap in an accurate way in patients suffering bilaterally from a severe conductive hearing loss is shown.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 37 (1954), S. 378-381 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird eine neue Darstellung des 3-Desoxy-4, 6-benzyliden-α-methyl-D-glucopyranosids (II) durch Reduktion von 2,3-Ditosyl-4,6-benzyliden-α-methyl-D-glucopyranosid (I) durch Lithiumaluminium hydrid beschrieben.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 37 (1954), S. 790-798 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus Verbenalol, Tetrahydro-verbenalol und Desoxy-verbanol wurde durch Oxydation mittels KMnO4 Methylbernsteinsäure erhalten. Der Abbau des Tetracetyl-verbenalins durch Ozon führte zu β-Methylglutarsäure (daneben Oxalsäure und Methylbernsteinsäure). Aus Desoxy-verbanol liess sich ein Mono-p-toluolsulfonsäureester herstellen; Norverbanol wurde in ein Dibenzoyl- und in ein Di-p-nitrobenzoylderivat übergeführt. Die Oxydation des Tetracetyl-verbenalins mittels Benzopersäure ergab ein Epoxy-Derivat. (C)—CH3-Bestimmungen bewiesen, dass Verbenalol und Tetrahydroverbenalin nur eine an Kohlenstoff gebundene Methylgruppe enthalten, Desoxy-verbanol dagegen zwei.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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