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  • Digitale Medien  (3)
  • 36.40. +d  (1)
  • Cell death  (1)
  • Chemical composition of rickettsia  (1)
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Materialart
  • Digitale Medien  (3)
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  • 1
    Digitale Medien
    Digitale Medien
    Delayed neuronal death in the rat hippocampus following transient forebrain ischemia (1984)
    Springer
    Acta neuropathologica 64 (1984), S. 139-147 
    Details
    ISSN: 1432-0533
    Schlagwort(e): Cerebral ischemia ; Cell death ; Endoplasmic reticulum ; Hippocampus ; Rat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary An unusual, slowly progressing neuronal damage has been reported to occur in the gerbil hippocampus following ischemia (Kirino 1982). Delayed neuronal death following ischemia has also been noticed in the rat four-vessel occlusion model (Pulsinelli et al. 1982). By light microscopy this slow neuronal injury in the rat was not different from the previously known neuronal ischemic cell change. This report lead us to the question as to whether neurons in the rat hippocampus are damaged rapidly following an initial latent period or deteriorate slowly and progressively until they display overt changes. To clarify this point, observation was done on the hippocampal CA1 sector of the rat following ischemia. Rats were subjected to four-vessel occlusion, and those which developed ischemic symptoms were perfusion-fixed. Although the change appeared very slowly and lacked microvacuolation of the cytoplasm, neuronal alteration was practically not different from classical ischemic cell change. By electron microscopy, however, the change was detectable when the neurons still appeared intact by light microscopy. An increase in the membranous organelles and deposition of dark substances were the initial manifestations. It seemed that the CA1 neurons deteriorated very slowly and progressively, and that they retained partial viability in the initial phase of the change. In spite of the difference in light-microscopic findings, the mechanisms underlying delayed neuronal death in the rat and gerbil hippocampus seemed to be identical.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00695577
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  • 2
    Digitale Medien
    Digitale Medien
    A comparative view of Rickettsia tsutsugamushi and the other groups of rickettsiae (1991)
    Springer
    European journal of epidemiology 7 (1991), S. 259-269 
    Details
    ISSN: 1573-7284
    Schlagwort(e): Rickettsia ; Chemical composition of rickettsia ; Nucleic acid of rickettsia ; Protein constitution of rickettsia ; Gene structure of rickettsia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Recent researches on the rickettsial group microorganisms are summarized in their comparative aspects of morphology, cultivation and multiplication, susceptibility to chemotherapeutics, chemical structure of envelopes, nucleic acid, protein constitution, and gene structures. From this overview, Rickettsia tsutsugamushi seems to have different properties from the others and should be reclassified into a new genus, and a new species name as Orientia tsutsugamushi is proposed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00145675
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  • 3
    Digitale Medien
    Digitale Medien
    Shell effects on symmetric fragmentations of alkali-metal clusters (1991)
    Springer
    The European physical journal 19 (1991), S. 145-147 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 36.40. +d
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Symmetric fragmentation of multiply charged alkali-metal clusters consisting of several tens of atoms is studied. The energy variation during the fragmentation process is calculated using the theory ofshell corrections, in which total energy is written as a sum of the liquid-droplet and shell correction terms. It is found that the variation of the shell correction term is much larger than that of the liquid-droplet one if the parent cluster is metastable. Fragmentation into nearly-magic cluster is most favored regardless of parent size since the barrier height for fragmentation is mainly determined by the shell configuration of fragments rather than that of the parent.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01448276
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