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  • Condensed Matter: Electronic Properties, etc.  (1)
  • Cytochalasin B  (1)
Document type
Keywords
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  • 1
    Electronic Resource
    Electronic Resource
    The contractile ring (1970)
    Springer
    Cell & tissue research 109 (1970), S. 431-449 
    Details
    ISSN: 1432-0878
    Keywords: Contractile ring ; Cytokinesis ; Cell division ; Cytochalasin B ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Techniques of individual cell selection and precise ultramicrotomy have been employed to demonstrate that the contractile ring of cleaving HeLa cells is a transitory cytoplasmic organelle of distinctive fine structure and location. The contractile ring is an uninterrupted annulus encircling the equator of dividing cells exactly where the cleavage furrow forms. It is about 10 microns wide, up to 0.2 microns in thickness, and is composed exclusively of circumferentially aligned thin filaments 40–70 Å in diameter. Contractile ring filaments appear to be associated with the overlying plasma membrane. Controlled experiments with a mold metabolite (cytochalasin B) reveals that within a few minutes the drug abolishes the ability of HeLa cells to undergo cytokinesis. Cytochalasin B seems to decompose the contractile ring. It has no other clearly identifiable effects on other cell structures, notably the mitotic apparatus. Cytochalasin B is the only drug known which selectively inhibits cytokinesis in animal cells. In conclusion, the contractile ring is the most likely organelle responsible for cytokinesis in HeLa cells. Similar organelles probably occur in all cleaving animal cells. Successful cleavage depends upon the structural and functional integrity of the contractile ring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00343960
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    Paper (German National Licenses)
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  • 2
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    Quantum Griffiths Phase Inside the Ferromagnetic Phase of Ni_{1−x}V_{x} (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-06-29
    Description: Author(s): Ruizhe Wang, Adane Gebretsadik, Sara Ubaid-Kassis, Almut Schroeder, Thomas Vojta, Peter J. Baker, Francis L. Pratt, Stephen J. Blundell, Tom Lancaster, Isabel Franke, Johannes S. Möller, and Katharine Page We study by means of bulk and local probes the d -metal alloy Ni 1 − x V x close to the quantum critical concentration, x c ≈ 11.6 % , where the ferromagnetic transition temperature vanishes. The magnetization-field curve in the ferromagnetic phase takes an anomalous power-law form with a nonuniversal exponent... [Phys. Rev. Lett. 118, 267202] Published Wed Jun 28, 2017
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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