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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Protoplasma 100 (1979), S. 73-83 
    ISSN: 1615-6102
    Schlagwort(e): Bivalve ; Fertilization ; Laternula limicola ; Sperm-egg interaction ; Temporary-acrosome ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Ultrastructural studies on sperm-egg interaction at the time of fertilization inLaternula limicola were performed. The “temporary-acrosome” did not change morphologically while the sperm passed through the egg investments. At the onset of sperm entrance into the egg, however, the temporary-acrosome and mitochondria were eliminated from the sperm. Afterwards the sperm was engulfed by the egg surface without membrane fusion of the gametes. After entry the sperm nucleus was surrounded by four membranes: the plasma membranes of the egg and of the sperm, and the membranes of the sperm nuclear envelope. As the sperm nucleus differentiated into the male pronucleus, the plasma membranes of both the sperm and egg were initially vesiculated, then dispersed into the egg cytoplasm. Finally, the sperm nuclear envelope changed into the male pronuclear membrane accompanying sperm chromatin dispersion.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Modern rheumatology 10 (2000), S. 54-57 
    ISSN: 1439-7609
    Schlagwort(e): Key words Toxic shock-like syndrome ; Group-A streptococcal infection ; Erosive arthritis ; Reactive arthritis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The patient was admitted to our department with major complaints of fever, swelling of the left thigh, and a cognition disorder. A blood culture yielded type T1, toxin-B-positive group-A streptococcus. Magnetic resonance imaging of the left foot showed fasciitis. Severe group-A streptococcal infection was diagnosed, and the administration of antibiotics, a massive dosage of gamma-globulin, and a steroid preparation were prescribed, which resulted in a general improvement in the symptoms and reductions in the swelling of the left foot and the second finger of the left hand without any sequelae. Following discharge from the hospital, however, destruction of the joint of the first toe of the right foot was recognized. A number of cases of post-streptococcal reactive arthritis (PSRA) have recently been reported, and the pathogenicity of this arthritis, which is different from that of rheumatic fever, has been noted. Severe group-A streptococcal infections, such as the one described here, may develop into erosive arthritis after the symptoms, that affect several organs, have disappeared. We believe that because it is possible for post-streptococcal reactive arthritis to develop, one should be aware of this when dealing with all clinical patients who have streptococcal infections.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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