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  • Astrocytomas  (1)
  • Colloidal dispersions  (1)
  • Dopamine neuron  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Malignant hemispheric tumors in childhood (1993)
    Springer
    Child's nervous system 9 (1993), S. 131-135 
    Details
    ISSN: 1433-0350
    Keywords: Supratentorial tumors ; Astrocytomas ; Ependymomas ; Secondary malignancies ; Paediatric patients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Sixty-four malignant hemispheric tumors in children less than 15 years old were treated in the pediatric neurosurgical department of the H ôpital des Enfants Malades between 1970 and 1989. (1) These tumors evolved rapidly in most cases. However the pre-operative evolution in 20% of the patients had a duration of more than 6 months, which favors the hypothesis that at least one-fifth of these tumors result from malignant transformation of a benign lesion. This observation should prompt neurosurgeons to operate on all benign hemispheric tumors as soon as they are diagnosed. (2) Five of the 64 patients had two successive malignant diseases. In four cases the other malignant disease was an acute lymphoblastic leukemia. (3) Among the malignant hemispheric tumors, the grade III and IV astrocytomas had a dismal prognosis. As it is known from previous studies that grade I and II astrocytomas have a good prognosis in children, it can be concluded that grading these tumors is essential. By contrast, almost one out of two patients with malignant ependymoma was alive 5 years after treatment. This implies that the grading of ependymomas is of modest prognostic values. (4) The harmful effect of radiotherapy was evaluated by comparing the functional outcome of children operated for a benign hemispheric tumor to that of children operated and irradiated for a malignant hemispheric tumor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272260
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Glial cells and Parkinson’s disease (2000)
    Springer
    Journal of neurology 247 (2000), S. II58 
    Details
    ISSN: 1432-1459
    Keywords: Key Words Apoptosis ; Cytokines ; Dopamine neuron ; Substantia nigra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Parkinson’s disease is a neurodegenerative disease characterised by a massive loss of dopaminergic neurons in the substantia nigra. Yet glial cells may also participate in the pathophysiology of the disease. Indeed, glial cells can produce trophic factors which may stimulate neuronal survival or, alternatively, they could produce toxic compounds which may be involved in neuronal degeneration. This paper reviews the potentially protective or deleterious effects of glial cells in the substantia nigra of patients with Parkinson’s disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00007762
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Electron microscopy and light scattering study of organometallic inverse micellar systems (1995)
    Springer
    Colloid & polymer science 273 (1995), S. 242-251 
    Details
    ISSN: 1435-1536
    Keywords: Colloidal dispersions ; organometallic micellar systems ; microscopic structure ; microscopic properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Colloidal dispersions in hydrocarbons of lead and calcium salts of isooctanoic acids are studied by means of Transmission Electron Microscopy and Light Scattering. The complementary results obtained, using each technique, allow us to investigate the structure of the mineral core, the size and the morphology of the colloidal particles. Special attention is paid to the aggregation properties of the metal salts particles as a function of the dilution and solvent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00657830
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    Paper (German National Licenses)
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