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  • 1990-1994  (2)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 899-902 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new type of opto-optical modulation effect in nematic liquid crystals is experimentally observed. The transmitted intensity of a He-Ne laser beam passing through a liquid crystal sample while applying a dc voltage is modulated by illuminating the sample with a xenon flash lamp pulse. The response time is fast, of the order of several milliseconds. The modulated state lasts for about 500 ms. A modulated intensity of light as large as ten times the unmodulated one is obtained. The physical origin of this effect is also discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 248 (1990), S. 119-122 
    ISSN: 1434-4726
    Keywords: Experimental sinusitis ; Rabbit ; Cytochemistry ; Na/K-ATPase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Sinusitis was produced in rabbits, after which animals were separated into three groups: allergic sinusitis, induced purulent sinusitis, and spontaneous purulent sinusitis. Mucosal specimens were taken from these animals and normal controls. Na/K-ATPase was localized cytochemically and its activity studied in order to define the energy metabolism of secretion. The Na/K-ATPase reaction was unable to be clearly distinguished in either the allergic sinusitis specimens or the normal mucosa. In both purulent sinusitis groups, an intensive reaction was observed in the subepithelial glands and a weak reaction was found in the goblet cells. The Na/K-ATPase activity in the purulent sinusitis groups was significantly higher than that in the normal control group. The increased Na/K-ATPase activity may be an affect of hyperactivity of the secretory cells.
    Type of Medium: Electronic Resource
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