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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 1095-1096 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig, 1. A group of three sperm cells of Ornithodoros tholozani covered with micro-organisms. Fresh preparation, from a spermatophore dissected from female's uterus. Vitally stained with Janus green. (x 100) Fig. 2. Site of sperm cell with attached micro-organisms, (x 900) Fig. 3. Detached ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 187 (1960), S. 964-964 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The glands become evident soon after the onset of feeding and continue to develop during the period of digestion of the blood meal. In Ripicephalus, which oviposits 2-3 days after gorging, the development is completed during this interval ; in Hyalomma, in which oviposition occurs ten days after ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 37 (1981), S. 96-98 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Platelets impregnated with heavy metals appeared as 3 distinct morphological types: ‘reticular’ cells with a polygonal dense tubular network and stained granules, dark metallophilic cells, and pale metallophobic cells with microvesicles and non-staining granules. On stimulation, type 1 cells decreased while type 3 cells increased, suggesting that with activation dense tubules break up into microvesicles and granules become metallophobic. In the type 2 cells a different functional mechanism may exist.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 33 (1977), S. 195-197 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Myogenesis was accelerated by addition of bone marrow cells to muscle minces cultures in diffusion chambers. This effect was inhibited by using gold suppressed bone Marrow cells.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Diabetologia 31 (1988), S. 618-620 
    ISSN: 1432-0428
    Keywords: Cationized ferritin ; negative charge ; endothelium ; diabetic rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cationized ferritin binding was used to measure negative surface charge on endothelium of large arteries in streptozotocin-induced diabetic rats and normal control rats. The negative charge was significantly lower in the diabetic animals (p〈0.01). This change, possibly related to glycosylation, may lead to altered vascular permeability and may be of importance in the vascular pathology of diabetes.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Basic research in cardiology 74 (1979), S. 250-261 
    ISSN: 1435-1803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Nach operativer Freilegung wurden beim Herzen von Ratten durch direkte Vereisung eine örtliche Schädigung gesetzt. Die Herzen wurden 2, 4, 20 und 48 Stunden sowie 7 und 12 Tage später untersucht. In den ersten 48 Stunden trat eine Infiltration mit Mastzellen und polymorphkernigen Granulozyten (hauptsächlich Eosinophilen) auf, gefolgt von einer Proliferation mononuklearer Phagozyten, fibroplastischen Zellen und neuer Kapillaren. Die benachbarten Muskelpartien zeigten eine Schädigung im Sinne eines Einfrier-Auftau-Rigors, segmentaler Muskelfaser-Nekrose, Phagozytose und fokaler Regeneration. Nach 7 Tagen erschienen zahlreiche Myofibroblasten, die enge Beziehungen zeigten zu Muskelfasern, die der Degeneration und Regeneration unterlagen. Nach 12 Tagen war eine verstärkte Bindegewebsbildung zu verzeichnen mit mesothelialen Deckzellen des Epikardiums, die Muskelfasern normalisierten sich. Es wird angenommen, daß Amine, die von den Mastzellen freigesetzt werden, an der Bildung der Myofibroblasten beteiligt sind.
    Notes: Summary Rat hearts were exposed and injured locally by direct cryoapplication. The hearts were examined 2, 4, 20 and 48 hours, 7 and 12 days later. In the first 48 hours mast cell and polymorphonuclear (mainly eosinophilic) granulocyte infiltration was followed by proliferation of mononuclear phagocytic and fibroblastic cells and new capillaries. The underlying muscle showed freezethaw-rigor damage, segmental intramyofiber necrosis, phagocytosis and focal regeneration. After 7 days numerous myofibroblasts appeared and they were intimately related to myofibers undergoing degeneration and repair. After 12 days there was increased fibrosis while mesothelial covering cells of the epicardium and myofibers returned to normal. It is suggested that amines released from mast cells are involved in the formation of myofibroblasts.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular histology 14 (1982), S. 73-86 
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Vaious methods of heavy metal impregnations were performed on human platelets. The optimal technique consisted of glutaraldehyde fixation, incubation in warm uranyl acetate at a pH of 3.5, followed by a double solution of lead and copper, and finally overnight immersion in cold osmium tetroxide. Semi-thin sections, viewed at 90 kV, revealed three types of platelets: (1) ‘reticular’ cells, with a prominent tubular network and very dark granules in a pale cytoplasm; (2) ‘dark’ cells, with an electron-dense cytoplasm; and (3) ‘pale’ cells, with microvesicles and non-staining granules. Pre-treatments with EGTA, aspirin and various platelet activators altered the appearances and proportions of the three cell types. A cell-partitioning two-phase polymer system showed that the sub-grouping is related to surface membrane properties, the cells retained in the top phase being exclusively type 2 ‘dark’ cells. The changes in cell type distribution produced by activation show that metal impregnation may be a useful method for studying structure-function correlations in platelets.
    Type of Medium: Electronic Resource
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