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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 272 (1975), S. 223-226 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By means of a level crossing experiment the hyperfine structure constants of thez 6 P 7/2-level of Eu have been determined. The results areA=-6.51(6) MHz andB= 131.2(1.0) MHz in the isotope151Eu andA=-2.84(3) MHz andB=327.5(1.5) MHz in the isotope153Eu. Experimental data on the hyperfine splitting are available now for 11 of the 12 levels of the configuration 4f 7 (8S)6s 6p of EuI. These data are compared with the theoretical interpretation given by Bordarieret al. [1] which was based on only 7A-factors andB-factors. It is shown that the agreement between theory and experiment can be improved by taking into account configuration interactions.
    Type of Medium: Electronic Resource
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  • 2
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    Unknown
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 25:8 (1977) 949 
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  • 3
    facet.materialart.
    Unknown
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 25:8 (1977) 1016 
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  • 4
    facet.materialart.
    Unknown
    Frankfurt am Main : Periodicals Archive Online (PAO)
    Romanische Forschungen. 90:2/3 (1978) 285 
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 158 (1979), S. 51-62 
    ISSN: 1432-0568
    Keywords: Cerebellar cortex ; Pre-and postterminal blood vessels ; Rhesus monkey, cat, rat ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the rhesus monkey, cat and rat, pial arteries give off branches which run vertically through all three layers of the cerebellar cortex. The large cortical arteries are surrounded by a perivascular space in the molecular layer. Their wall consists of several layers of smooth-muscle cells and the luminal endothelium. As the arteries reach the deeper layers of the cerebellar cortex, the number of smooth-muscle cells is reduced. In the rat, sometimes no smooth-muscle cells are detectable in the preterminal arterial vessels. If these deep arteries branch off by dichotomy of terminal vessels there occurs a gradual or complete loss of myocytes in all three species. In the cat, where cortical arteries give off branches at rightangles, there is a sphincter-like accumulation of smooth-muscle cells at the opening to the smaller branch. The postterminal vessels and veins in all species exhibit the smae mural structure found in capillaries. The wall consists only of an endothelium and occasional pericytes embedded in the basal lamina. Even the large veins which run to the pial veins show this simple mural structure.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 138 (1972), S. 329-346 
    ISSN: 1432-0568
    Keywords: Cerebellum ; Cytoarchitecture ; Man ; Rhesus monkey ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der Kleinhirnrinde von Mensch, Rhesusaffe und Katze lassen sich Unterschiede in der Zellgröße und Zellzahl in verschiedenen Kleinhirnabschnitten nachweisen. Im ältesten Kleinhirnabschnitt, dem Lobus nodulofloccularis sind die Purkinjezellen und die Körnerzellen stets größer als in den Lappen des Corpus cerebelli. Außerdem besteht noch eine Größendifferenz zwischen Wurm und Hemisphären. In den vermalen Abschnitten aller Kleinhirnlappen sind die Purkinjezellen und die Körnerzellen größer als in den dazugehörigen Hemisphärenanteilen. Daneben bestehen Unterschiede in der Zellzahl. Im Lobus nodulofloccularis ist die Zellzahl signifikant geringer als in den übrigen Kleinhirnabschnitten. Ähnlich wie bei der Zellgröße bestehen aber auch bei der Zellzahl Unterschiede zwischen den Hemisphären- und Wurmanteilen eines Kleinhirnlappens. In den Wurmabschnitten ist die Zellzahl geringer als in den Hemisphären. Die regionalen Unterschiede in der Cytoarchitektonik und das zahlenmäßige Verhältnis der Purkinjezellen zu den Körnerzellen bei Mensch, Rhesusaffe und Katze werden im Hinblick auf den evolutiven Status der Gehirne diskutiert.
    Notes: Summary In different parts of the cerebellar cortex of man, rhesus monkey and cat there are variations in the size and number of cells. In the lobus nodulofloccularis, the Purkinje cells and the granule cells are larger in diameter than in the corpus cerebelli. Moreover, the Purkinje cells and the granule cells in the vermal parts of the nodulofloccular lobe, the posterior lobe and the anterior lobe are always larger in size than in the hemispheres of these lobes. In addition there are differences in the number of cells: In the nodulofloccular lobe the number of cells per unit volume is significantly lower than in the different parts of the corpus cerebelli; in the vermal parts the number of cells is smaller than in the respective parts of the hemispheres. Thus there are parallels between the differences in size and in number of Purkinje cells and granule cells in the phylogenetic older (vermis) and younger (hemispheres) parts of the cerebellum. The regional differences in cytoarchitectonics of the cerebellar cortex in man, rhesus monkey and cat are discussed with respect to evolution.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 152 (1978), S. 325-329 
    ISSN: 1432-0568
    Keywords: Spinal cord (rhesus monkey, cat) ; Paired vessels ; Blood supply of individual spinal segments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the spinal cord of the rhesus monkey and of the cat paired vessels near the central canal are described. These paired vessels, consisting of one artery and one vein, are enveloped by a common glial sheath. In some Virchow-Robin's spaces two arteries and two veins can be observed. The physiological significance of this morphological feature is briefly discussed.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-0630
    Keywords: Dye lasers ; Atomic spectroscopy ; Lifetimes ; Sodium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The 42D level of sodium was populated in a stepwise excitation process involving two pulsed dye lasers. The lifetime of the 42D level was derived from the decay of the fluorescence intensity.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 24 (1973), S. 340-344 
    ISSN: 1432-0533
    Keywords: Tubular Structures ; Glial Cells ; Cerebellar Cortex ; Macaca cynomolgus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the cerebellar cortex ofMacaca cynomolgus there are all types of glial cells as well as in other species. In the astrocytes, the Fañanas-cells and the microglia very often enlarged cisterns of the ergastoplasm occur in which tubular structures are located. These structures consist of very closely packed tubules with a diameter of 200 Å. The wall of the tubules is formed by a very fine granular material, their lumen is empty. These tubular structures of glial cells are only found in the cerebellar cortex. A possible similarity to viruses is discussed.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Biological cybernetics 17 (1975), S. 145-156 
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract We first show how to formalize environments in which situations can be changed only by action, and in which a situation should be brought about that is acceptable. This leads us to the concept of a problem constellation that consists of an action system, a reaction system, a judgement system, and an initial situation. We then present a cybernetical system which we call Robbimat. It is capable of testing problem constellations, of modifying them according to the results of the tests, and of judging the final constellation. We designed Robbimat in order to have favourable problem constellations automatically generated. As an example we discuss a simple game. It constitutes a win-loss-environment the structure of which can be deduced from the payoff function. We show how Robbimat analyses such an environment, and utilizing its structure classifies the initial situation.
    Type of Medium: Electronic Resource
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