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  • 1965-1969  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Electron microscopic studies on BHK 21 cells infected with rift valley fever virus (1968)
    Springer
    Archives of virology 25 (1968), S. 58-64 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Electron microscopic studies on BHK 21 cells infected with Rift Valley Fever virus (RVFV) are reported. Entry of virus particles into the cell up to 20 hours after inoculation is demonstrated. No envelope derived from the cell membrane is present on virus particles inside or outside the cell. The particle has a diameter of approximately 94 mμ, a core diameter of approximately 77 mμ and a capsid-like outermost layer of width 9 mμ. Between core and capsid is an electron-translucent area of width 8 mμ. Myelin figures are abundant and progeny particles are usually found in association with cisternae of the endoplasmic reticulum. The appearance of peculiar rod-shaped structures in the cytoplasmic matrix suggests some transformation of the elements of the endoplasmic reticulum. Characteristic granular nuclear inclusions are present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01243090
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Formation of wesselsbron virus in BHK-21 cells (1969)
    Springer
    Archives of virology 27 (1969), S. 332-338 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The multiplication of attenuated and virulent strains of Wesselsbron virus in BHK-21 cells have been investigated electron microscopically. In thin sections of cells infected with virulent virus and harvested at different time intervals, mesh-like structures, similar to those reported by previous workers, are observed. However, cells infected with the attenuated form of the virus do not show these structures at all, indicating that these mesh-like bodies are not a prerequisite for virus production. Cytoplasmic inclusions containing dense nucleoids and developing virus particles are reported. Mature virus particles are commonly found in cisternae of the endoplasmic reticulum in both virulent and attenuated forms of the virus. Particle measurements have yielded a diameter of 45 mμ, which is somewhat larger than measurements obtained by previous workers. The similarity between the mesh-like structures reported in this work, the “granular virus-forming areas” reported bySoutham et al. (1964) in HBp2 cells infected with West Nile virus and the structures occurring in cells infected with yellow fever virus (Bekgold andWeibbl, 1962) may indicate a close cytopathic relationship between these group B arboviruses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01249655
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Einfluß der Umklapp-Prozesse auf die hydrodynamischen Bewegungsformen der Phononen in Kristallen (1969)
    Springer
    The European physical journal 9 (1969), S. 300-310 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Zusammenfassung Frühere Untersuchungen über den zweiten Schall und die Poiseuille-Strömung der Phononen in dielektrischen Kristallen werden durch Einbezug der U-Prozesse erweitert. Es werden durchwegs longitudinale und transversale Phononen berücksichtigt. In den ersten zwei Abschnitten wird die Stoßzeitnäherung verwendet unter Berücksichtigung verschiedener relativer Größenverhältnisse der Stoßzeiten für U- und N-Prozesse. Im dritten Abschnitt wird die linearisierte Boltzmann-Peierls-Gleichung mit Hilfe einer doppelten Störungsrechnung nach U-Prozessen und hydrodynamischen Frequenzen gelöst und die Dämpfung des zweiten Schalls ausgerechnet.
    Abstract: Résumé On considère l’influence des processus Umklapp sur le second son et sur le flux de Poiseuille des phonons dans un solide diélectrique. Partout l’on tient compte de phonons longitudinaux et transversaux. Dans les deux premières sections, on emploie l’approximation de temps moyens de collision. Différents rapports des fréquences des processus Umklapp et normaux sont considérés. Dans la troisième section, l’équation linéarisée de Boltzmann-Peierls est résolue à l’aide d’un calcul de perturbation double où les fréquences Umklapp ainsi que les fréquences hydrodynamiques sont supposées petites. L’atténuation du second son est calculée.
    Notes: Abstract The influence of U-processes on second sound and Poiseuille flow of the phonons in dielectric solids is investigated. Longitudinal and transverse phonons are allowed for throughout. In the first two sections the mean free time approximation is used. Various ratios of the mean free times for U- and N-processes are considered. In the third section the linearized Boltzmann-Peierls equation is solved by means of a double perturbation calculation, whereU-frequencies as well as hydrodynamic frequencies are considered as small, and the damping of second sound is calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02422573
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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