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  • 1975-1979  (3)
  • 1965-1969
  • 1975  (3)
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  • 1975-1979  (3)
  • 1965-1969
Year
  • 1
    Electronic Resource
    Electronic Resource
    Contrast of 180° domains of PbTiO3 in an electron microscopic image (1975)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 31 (1975), S. 59-63 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The contrast of 180° domains of PbTiO3 depends on temperature and is caused by differences in the intensity of the diffuse background. The thickness extinction fringes of 180° domains taken at different temperatures between room temperature and near the Curie temperature are qualitatively explained with the use of many-beam dynamical theory, in which different anomalous absorption factors are assumed for each case. The origin of the contrast is interpreted and discussed in terms of the difference in thermal diffuse scattering between the 180° domains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739475000113
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    On generalized kinematic hardening theory of plasticity (1975)
    Springer
    Archive of applied mechanics 44 (1975), S. 255-268 
    Details
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Übersicht Es wird eine anisotrope Plastizitätstheorie vorgeschlagen, die auf der kinematischen Verfestigung aufbaut, aber gleichzeitig die Dehnung, Verschiebung und Rotation der Fließfläche berücksichtigt. Die Eigenschaften der anisotropen Koeffizienten werden für einige experimentelle Ergebnisse untersucht. Dann wird die inkrementelle Stoffgleichung hergeleitet. Sie wird zur Bestimmung der folgenden Fließflächen angewendet.
    Notes: Summary An isotropic theory of plasticity is proposed in which expansion, rotation and translational movement of the yield surface are taken into account. The properties of the anisotropic parameters are investigated for some measured data. The incremental constitutive equation is then derived. The resulting constitutive equation is used to predict the shapes of subsequent yield surfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00534484
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    In vitro growth of neoplastic rat glial cells (1975)
    Springer
    Journal of cancer research and clinical oncology 84 (1975), S. 193-202 
    Details
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein mit Methylnitrosoharnstoff erzeugter Hirntumor (Ependymom) bei einer BD-Ratte wurde in vitro kultiviert. Es wuchsen sowohl Firoblasten als auch sternförmige gliaähnliche Zellen. Reimplantation dieser Zellen in das Gehirn einer anderen BD-Ratte führte zu Tumorwachstum in den weichen Häuten. Diese Geschwulst wurde intracerebral über mehrere Passagen verimpft. Obwohl dieser Transplantationstumor morphologisch einem Sarkom ähnlich war, konnten durch Silberimprägnation Gliazellen angefärbt werden. Eine aus der ersten Transplantationsgeneration in vitro abgeleitete Zellinie enthielt S-100 Protein in Spuren. In-vitro explantierte Zellen des mit Methylnitrosoharnstoff erzeugten Primärtumors wurden kloniert. Zwei Klone, RGL 1 und RGL 2, bestanden aus Zellen, die morphologisch den sternförmigen Elementen des Primärexplantates glichen. Der Klon RGL 1 enthielt S-100 Protein. In der 16. Passage wurde er erneut kloniert; von vier Unterklonen enthielt lediglich einer S-100 in Spuren. Dieser Klon besaß einen subdiploiden Karyotyp mit 39 Chromosomen, zusätzlich ein submetazentrisches Markerchromosom. Zwei Subklone von RGL 2 aus der 25. Passage besaßen 41 Chromosomen.
    Notes: summary An ependymoma was induced in the brain of a BD-IX rat by repeated doses of MNU. In vitro grown cells of the tumor were fibroblasts and stellate cells considered to be glial. Reimplantation of these cells into the brain of another BD-IX rat resulted a tumor growing in the meninges. This tumor was then repeatedly transplanted over several passages. Its gross morphology resembled that of a sarcoma; however, glial in cells could be demonstrated with silver methods. A cell line derived from the first transplanted tumor group proved to contain S-100 protein in traces in the first passages in vitro. Explanted cells of the primary ependymoma were cloned. Two clones were established, RGL 1 and RGL 2. The cells of both clones resembled morphologically the stellate elements of the primary explant. RGL 1 contained S-100 protein. It was cloned again in the 16th subpassage. Four clones were established. Only 1 contained S-100 protein in traces. The clone RGL 1 had a subdiploid karyotype with a modal number of 39 and a large submetacentric marker. It was subcloned in the 25th passage with two clones, both having a karyotype of 41 chromosomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304044
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    Paper (German National Licenses)
    Fulltext
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