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  • 11
    Electronic Resource
    Electronic Resource
    Comparison of immune-mediated models of acute and chronic otitis media (1990)
    Springer
    European archives of oto-rhino-laryngology and head & neck 247 (1990), S. 247-251 
    Details
    ISSN: 1434-4726
    Keywords: Otitis media ; Immune responses ; Histopathology ; Sensorineural hearing loss
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The distribution of immunoglobulin-bearing cells and the pattern of histopathological changes in the middle ear (ME) mucosa, round window membrane (RWM), and inner ear were compared during acute and chronic immune-mediated otitis media with effusion (OME) in the guinea pig as an animal model. In both acute and chronic immune responses (IRs), mucosal hyperplasia, edema, neovascularization, and cellular infiltration were observed. IgG+ cells were predominant in both the acute and chronic IRs. The number of IgA+ cells, however, increased in the mucosa and RWM during chronic IRs. Only the chronic IR resulted in gland formation within the ME and inflammation within the cochlea. These results indicate that the chronic IR was more similar to reports of clinical OME than the acute IR, The cochlear inflammation associated with chronic OME can lead to sensorineural hearing loss, as reported in clinical studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178996
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  • 12
    Electronic Resource
    Electronic Resource
    The thermal conductivity of Kevlar fibre-reinforced composites (1982)
    Springer
    Journal of materials science 17 (1982), S. 2925-2931 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The thermal conductivities of a series of blocks consisting of Shell DX210/BF3400 resin reinforced with Kevlar 49 fibre are reported in the approximate temperature range 180–270 K. The results are used to calculate the thermal conductivities of the fibres in directions parallel and perpendicular to their length. Varying the angle between the principal fibre directions of bidirectional laminates produced in-plane results that varied in a manner which was quantitatively consistent with expectation. The out-of-plane results proved to be independent of fibre orientation, as expected. In-plane and out-of-plane results for a Kevlar 49 fabric reinforced laminate proved to be essentially similar to results for a laminate reinforced with unwoven fibres of the same type, arranged in a 90° cross-plied disposition at the same fibre volume density.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00644671
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    Paper (German National Licenses)
    Fulltext
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