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  • 1
    Electronic Resource
    Electronic Resource
    Autoradiographic assessment of 3H-proline uptake by osteoblasts following guanethidine-induced sympathectomy in the rat (1981)
    Springer
    Cell & tissue research 216 (1981), S. 215-220 
    Details
    ISSN: 1432-0878
    Keywords: Autoradiography ; 3H-proline ; Osteoblasts ; Sympathectomy ; Guanethidine-sulfate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Sympathectomy was carried out in rats by injections of guanethidine-sulfate from birth to 14 days of age. At 45 days of age, the activity of osteoblastic cells was monitored by 3H-proline autoradiography. Effectiveness of sympathectomy was verified by light-microscopic examination of superior cervical and celiac ganglia. Grain counts over periosteal osteoblasts of the femoral diaphysis and osteoblasts mesial to the first molar in the mandible demonstrated a significantly reduced uptake of 3H-proline in the sympathectomized rats. The data provide direct evidence of sympathetic influence on osteoblastic activity and suggest that sympathectomy may result in the loss of a trophic influence which is important in the regulation of osteogenesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00234556
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  • 2
    Electronic Resource
    Electronic Resource
    Generalized Rouse-Zimm theory for polymer solutions (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 19 (1981), S. 849-862 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Generalized Rouse-Zimm equations are derived using a local equilibrium ansatz for the segment distribution function. The relaxation frequencies depend on excluded-volume effects and other interactions such as entanglement in semidilute solutions through exact static correlation functions. For the case of ring polymers general expressions are given for diffusion coefficients and mean-square displacements. By use of the “blob” model, explicit results are presented for a dilute good-solvent system.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.180190512
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    Paper (German National Licenses)
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