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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 236 (1982), S. 139-146 
    ISSN: 1434-4726
    Keywords: Lärmtrauma ; Magnesiummangel ; Perilymphe ; Haarzellstoffwechsel ; Noise trauma ; Mg deficiency ; Perilymph Mg ; Hair cell metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Mg-deficient guinea pigs developed significantly increased hearing loss during 4 weeks of noise exposure [95 dB(A)] as compared to animals fed a Mg-rich diet. The hearing loss was negatively correlated to the Mg content of the perilymph (r=−0.86). Besides this auditory effect, there was a decrease of intracellular Mg and an increase of collagen in the myocardium, both of which were correlated to the hearing loss and caused by Mg deficiency and noise stress.
    Notes: Zusammenfassung Bei Meerschweinchen, die mit 95 dB (A) über längere Zeit beschallt wurden, entwickelte sich unter Magnesium-Mangel ein signifikant größerer Hörverlust als bei normal ernährten Meerschweinchen. Der Hörverlust war mit dem Magnesiumgehalt in der Perilymphe negativ korreliert (r=−0,86). Neben den Auswirkungen auf das Hörorgan fand sich ein Absinken des intrazellulären Magnesiums und ein Ansteigen des Kollagengehaltes im Myocard. Beide Parameter korrelierten mit dem Hörverlust und wurden durch Magnesiummangel und Lärmstreß verursacht.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International archives of occupational and environmental health 47 (1980), S. 179-190 
    ISSN: 1432-1246
    Keywords: Biochemical reactions ; Blood circulation ; Cardiovascular disease ; Mg deficiency ; Psychical tension ; Traffic noise ; Working quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 57 test persons having worked 1 day under traffic noise (Leq= 85 dB(A) and 1 day without noise (Leq 〈 50 dB(A), blood pressure and pulse frequency were measured at 1 h intervals and total urine was collected during working hours. Additionally, blood was sampled at the end of each working day. Psychological parameters were assessed by means of questionnaires. Statistically significant reactions to noise were found in the following fields: 1. Ergnomics—decrease of working quality; 2. Psychology—increase of psychical tension; 3. Blood circulation—increase of blood pressure and pulse frequency; 4. Biochemistry—increase of epinephrine, cAMP, urine and serum Mg, protein, cholesterol plus decrease of erythrocyte Na, and renin. Hypothetical mechanisms of the action of traffic noise are discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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