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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 28 (1979), S. 33-36 
    ISSN: 1432-0827
    Keywords: Infrared, visible light ; Bone ; Collagen ; Apatite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract Photovoltaic effect (infrared and visible light) is observed in bone and its two major components, collagen and apatite, at room temperature. A dimunition in the magnitude of photovoltage is observed after exposure to ultraviolet light in all the cases. The drift mobility of the charge carriers is obtained by measuring I versus V relationships in sandwich samples and relating them to the permitivity of the medium. Lifetime of the injected carriers is measured in the usual way. The data are consistent with the hypothesis that the effects are due to protonic conduction phenomena.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 19 (1981), S. 244-246 
    ISSN: 1741-0444
    Keywords: Frequency ; Impedance ; Skin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The impedance of rabbit skin has been measured in the frequency range 1–60 kHz using a simple a.c. bridge method and stainless steel electrodes. The effect of four important drugs, namely, adrenaline, noradrenaline, atropine and histamine, has been examined. It was found that all these drugs produced a decrease in the skin impedance in varying degrees, suggesting a penetration of the ions through the underlying layers of the skin. For the purpose of analysis, all these data are compared with their own controls. The order of applying the two drugs adrenaline and noradrenaline at the same site on the skin of an animal does not produce a change in the nature of the relative impedance variation. It was observed that the effect produced by noradrenaline is more pronounced than that by adrenaline. The effect produced by these drugs was compared with that produced by pure hydration of the skin. It was found that the change produced in the latter case is much less than that produced by drugs, thus showing a clear difference between the two effects.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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