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  • 1
    Electronic Resource
    Electronic Resource
    Effects of Actinomycin D on Regeneration give Evidence of Sequential Gene Activation (1968)
    [s.l.] : Nature Publishing Group
    Nature 219 (1968), S. 1257-1258 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Planaria, Dugesia dorotocephala, were fasted for 4 days and washed serially in sterile saline (6 mM NaCl, 0.048 mM CaCl2 and 0.012 mM NaHCO3, pH. 7.0), penicillin and streptomycin (50 U and 50 µg/ml.) and finally in sterile saline. Heads were amputated just posterior to the auricles and the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2191257a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Chromatoid bodies in somatic cells of the planarian: Observations on their behavior during mitosisThis study was supported by National Science Foundation Grant GB-19630. The author is indebted to Mrs. Cindy Henk for her technical expertise. (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 180 (1974), S. 533-545 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The behavior of somatic cell chromatoid bodies in the planarian Dugesia dorotocephala during mitosis has been studied by electron microscopy. The relatively undifferentiated beta (progenitor) cells are the only somatic cells containing chromatoid bodies and also are the only dividing somatic cells. Somatic cell chromatoid bodies are known to disappear as differentiation takes place and reappear when dedifferentiation occurs. Interphase and prophase beta cells have juxtanuclear and peripheral cytoplasmic chromatoid bodies. There is no ultrastructural evidence to suggest they are derived from formed nuclear material. During metaphase and anaphase, the chromatoid bodies are segregated from the chromosomes and adjacent cytoplasm by cups of double membranes. By the completion of telophase, the chromatoid body size and number immediately adjacent to the nucleus is markedly decreased and extremely large chromatoid bodies may be found further out in the cytoplasm. These findings are compared to the behavior of germ cell chromatoid bodies and discussed in terms of their possible significance and function.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1091800312
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    Paper (German National Licenses)
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