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  • Articles: DFG German National Licenses  (2)
  • Electronic Resource  (2)
  • 1975-1979  (2)
  • 1977  (2)
Source
  • Articles: DFG German National Licenses  (2)
Material
  • Electronic Resource  (2)
Years
  • 1975-1979  (2)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Changes in the subarachnoid space after experimental subarachnoid haemorrhage in the dog: Scanning electron microscopic observation (1977)
    Springer
    Acta neurochirurgica 39 (1977), S. 1-14 
    Details
    ISSN: 0942-0940
    Keywords: Subarachnoid hemorrhage ; hydrocephalus ; subarachnoid fibrosis ; scanning electron microscope
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The possible changes in the subarachnoid space after subarachnoid haemorrhage were studied in animals by using a scanning electron microscope (SEM). About 1 ml/kg of autogenous blood was injected intracisternally in 36 adult mongrel dogs to investigate changes in the subarachnoid space, over periods ranging from immediately after the injection to as long as 6 months. We have come to the conclusion that the injected blood disappears in about one to two weeks; the fibrosis or thickening of the arachnoid membrane appears in one to three weeks, and then returns to normal in a month in instances of rapid recovery, but there are some cases in which fibrosis persists for a long period and becomes chronic. The fact that an increase of fibrous tissue was found in the parietal region, where the injected blood had hardly reached, appears to indicate that the fibrosis is not always limited to the site of the haemorrhage but can occur in remote regions. We also discuss the usefulness of the SEM in the observation of the subarachnoid space, and the finding that vascular specimen preparations can be made by perfusing the brain with 2–10% phosphate-buffered formaldehyde solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01405236
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Crystal growth of sapphire filaments by a laser-heated floating zone technique (1977)
    Springer
    Journal of materials science 12 (1977), S. 517-521 
    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 A laser-heated floating zone technique is employed to grow a filamentary c-axis sapphire. Crystal growth is directly recorded during the process by photography, and crystals grown under various conditions are examined by means of a transmission optical microscope to obtain the relationships between microvoid formation and growth conditions. Observations of filaments indicated that the microvoid results from shrinkage due to dendritic growth. Microvoids are eliminated by choosing a growth rate less than 4.7 cm h−1 or by focusing the laser beam. By using this method, a void-free filament of 1.4 mm diameter is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540276
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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