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  • 1
    Electronic Resource
    Electronic Resource
    Approach through the temporal horn of the lateral ventricle for clipping of large dorsal type basilar bifurcation aneurysms (1995)
    Springer
    Acta neurochirurgica 133 (1995), S. 17-21 
    Details
    ISSN: 0942-0940
    Keywords: Basilar bifurcation aneurysm ; operative approach ; transventricular approach ; temporal horn ; Sylvian vein ; Labb's vein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The authors describe an approach through the temporal horn of the lateral ventricle which proved to be useful for clipping of a large dorsal type basilar bifurcation aneurysms. It facilitates the preservation of the perforating arteries behind the aneurysm, because it gives sufficient working space to move the aneurysm dome. Furthermore this approach avoids many of the disadvantages of other approaches, especially the risk of iatrogenic injuries of the Sylvian or Labe's vein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01404942
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Microvascular changes associated with postischaemic hypoperfusion in rats (1997)
    Springer
    Acta neurochirurgica 139 (1997), S. 670-677 
    Details
    ISSN: 0942-0940
    Keywords: Postischaemic hypoperfusion ; endothelial microvilli ; endothelial cell swelling ; electron microscope
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The present study was undertaken to explore the cause of postischaemic hypoperfusion through morphological observations of the microstructure of brain cortex capillaries in rats with postischaemic hypoperfusion. Sixteen rats were used. The left middle cerebral artery of each animal was occluded for one hour (n = 8) or 2 hours (n = 8) and was followed by reperfusion for 2 hours. The regional cerebral blood flow (rCBF) of the ischaemia induced brain cortex was monitored continuously during the experiment and the microstructure of the brain cortex capillaries was then observed under electron microscope. Postischaemic hypoperfusion was observed in both ischaemia groups. The rCBF after 0.5 hours of reperfusion was significantly lower in the 2-hour ischaemia group than in the one-hour ischaemia group. The number of endothelial microvilli (MV) per capillary in the one-hour ischaemia group did not differ significantly from the control (the right cortex capillaries), whereas it was significantly higher in the 2-hour ischaemia group (p 〈 0.05). The ratio of the inner diameter to the outer diameter of capillaries decreased significantly in both ischaemia groups, and the ratio in the 2-hour ischaemia group was significantly lower than that in the one-hour ischaemia group (p 〈 0.05). Thus the present study statistically revealed that as postischaemic perfusion of the brains decreases, the number of MV increases, and endothelial cells swell more markedly. These microvascular changes seem to represent morphological factors associated with postischaemic hypoperfusion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412003
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Genomic Affinity Relationships in the Genus Avena (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 102 (1989), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Many interspecific hybrids between diploid, tetraploid and hexaploid Avena species were obtained without artificial embryo cultures. Most of the hybrids showed variable chromosome pairing with univalents, bivalents and multiple associations, even in PMC in the same hybrid, at first metaphase; making ii very difficult to understand the degree of genome affinity between parent species, and especially between different species. The basic or theoretical chromosome pairing consisting of bivalents and univalents is presented, in which the chromosome ratios (%) statistically agree with observations. In addition, the per cent frequency of chromosomes forming multivalents is calculated. On the bases of these numerical data, the genomic affinity relationships are discussed for present and previously reported interspecific hybrids or Avena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1989.tb00310.x
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    Paper (German National Licenses)
    Fulltext
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