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  • Autoradiography  (2)
  • Springer  (2)
  • American Physical Society (APS)
  • Cambridge University Press
  • Elsevier
  • 1970-1974  (2)
Collection
Publisher
  • Springer  (2)
  • American Physical Society (APS)
  • Cambridge University Press
  • Elsevier
Years
  • 1970-1974  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 153 (1974), S. 399-413 
    ISSN: 1432-0878
    Keywords: Spinal ganglia (Rat) ; Cell division ; Autoradiography ; Neurone morphogenesis ; Light and electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Pulse labelling with tritiated thymidine was used to determine the time of the final division of the neuroblasts which subsequently form rat lumbar dorsal root ganglion neurones. The final division occurred during a 4 day period, the maximum frequency being on day 12 of gestation. Separation of the ganglion cells into large light neurones and small dark neurones showed that the large light neurones were formed earlier than the small dark neurones. In both cases the final divisions occurred over a period of 3–4 days, but the peak rate of formation of large neurones was on day 12, and that of the small neurones was on day 13. Low power electron micrographs were used to measure mean cell diameter throughout development from day 11 of gestation until a postnatal age of 225 days. A marked increase in cell diameter occurred on day 15–15.5, about 3 days after the final cell divisions of the majority of the cells. The rate of growth increased just before birth, but no increase in mean cell diameter was found between day 21 of gestation and the third day postnatal. The growth was again rapid after this period until a plateau in cell diameter was reached about 33 days after birth.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 12 (1973), S. 169-173 
    ISSN: 1432-0827
    Keywords: Calcification ; Histochemistry ; Autoradiography ; Fetal ; Mandible
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Des rats femelles reçoivent du45Ca ou du32P au 13ème et 18ème jour de la grossesse. Les coupes sériées des têtes de foetus sont étudiées par autoradiographie et par diverses méthodes histologiques pour déterminer la calcification. La détection la plus précoce de45Ca s'observe simultanément comme une réaction positive pour le calcium avec une des méthodes histologiques utilisées.32P est en évidence par les méthodes autoradiographiques un peu plus tard que le45Ca et sa présence coincide avec la réaction positive la plus précoce observée avec les autres méthodes histologiques utilisées. Les os de ces têtes foetales commencent à se calcifier selon un mode particulier commençant par la mandibule, puis l'os frontal et le maxillaire supérieur, suivis par les os nasaux, pariétaux et interpariétaux.
    Abstract: Zusammenfassung Weibliche Ratten erhielten45Ca und32P zwischen dem 13.–18. Tag der Schwangerschaft. Zur Ermittlung der Verkalkung wurden Serienschnitte der Köpfe ihrer Feten mittels Autoradiographie sowie durch verschiedene histologische Methoden untersucht. Das erste Auftreten von45Ca war ebenfalls von einer positiven Calciumreaktion mittels einer der verwendeten histologischen Methoden begleitet.32P wurde in der Autoradiographie erst etwas später als45Ca festgestellt und dessen Nachweis deckte sich mit den ersten positiven Reaktonen aller anderen verwendeten histologischen Methoden. Die Knochen in diesen Fetusköpfen begannen in einer bestimmten Sequenz zu verkalken: zuerst der Unterkiefer, dann das Stirnbein und der Oberkiefer, dann das Nasenbein, die Parietal- und Interparietalknochen.
    Notes: Abstract Female rats were given45Ca or32P from 13 to 18 days of pegnancy. Serial sections from the heads of their fetuses were studied by autoradiography, as well as by several histological methods for assessing calcification. The earliest detection of45calcium occured at the same time as a positive reaction for calcium with one of the histological methods used.32P was not detectable by autoradiographic methods until somewhat later than45Ca, and its presence coincided with the earliest positive reaction with all of the other histological methods employed. The bones in these fetal heads began to calcify in a partcular sequence, the mandible first, then the frontal bone and maxilla, followed by the nasal, parietal and interparietal bones.
    Type of Medium: Electronic Resource
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