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  • Articles  (4)
  • Bone blood flow  (2)
  • Random walks  (2)
  • ASTROPHYSICS
  • 1980-1984  (4)
  • 1
    Electronic Resource
    Electronic Resource
    The early effects of sympathectomy on bone blood flow (1984)
    Springer
    Calcified tissue international 36 (1984), S. 622-624 
    Details
    ISSN: 1432-0827
    Keywords: Sympathectomy ; Microspheres ; Bone blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Several laboratories, including our own, have investigated the physiology of bone blood flow by perfusion of the tibia via the nutrient artery. Any damage caused to the nerve supply by cannulation of the artery might affect the results. The possible effect of such damage was investigated by measuring blood flow to the dog tibia using a microsphere technique, before and after sympathectomy. No effect was found and the tibial nutrient artery is therefore a suitable vessel for perfusion when estimating nutrient exchange in bone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405377
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Transcapillary exchange and retention of fluoride, strontium, EDTA, sucrose, and antipyrine in bone (1980)
    Springer
    Calcified tissue international 31 (1980), S. 173-181 
    Details
    ISSN: 1432-0827
    Keywords: Bone blood flow ; Capillary permeability ; Tracer exchange
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary The extractions of85Sr2+,18F−, sucrose-14C, EDTA-51Cr, and antipyrine-14C in bone were determined by the multiple indicator-dilution method. Fluoride and strontium extractions were 18 to 70% during a single transcapillary passage, and those of EDTA and sucrose were from 11 to 59%, whereas extraction of antipyrine was 87%. Injections of85Sr2+ and18F− made when perfusion was done alternately with blood and plasma resulted in similar fractional extractions. When flow and extraction were measured simultaneously, extraction was related inversely to flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407178
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  • 3
    Electronic Resource
    Electronic Resource
    Random walks on the Bethe lattice (1982)
    Springer
    Journal of statistical physics 29 (1982), S. 781-794 
    Details
    ISSN: 1572-9613
    Keywords: Random walks ; Bethe lattice ; Cayley tree ; first passage times
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We obtain random walk statistics for a nearest-neighbor (Pólya) walk on a Bethe lattice (infinite Cayley tree) of coordination numberz, and show how a random walk problem for a particular inhomogeneous Bethe lattice may be solved exactly. We question the common assertion that the Bethe lattice is an infinite-dimensional system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01011791
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  • 4
    Electronic Resource
    Electronic Resource
    Fractal and lacunary stochastic processes (1983)
    Springer
    Journal of statistical physics 30 (1983), S. 273-283 
    Details
    ISSN: 1572-9613
    Keywords: Random walks ; fractals ; stable distributions ; lacunary series
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Discrete-time random walks simulate diffusion if the single-step probability density function (jump distribution) generating the walk is sufficiently shortranged. In contrast, walks with long-ranged jump distributions considered in this paper simulate Lévy or stable processes. A one-dimensional walk with a selfsimilar jump distribution (the Weierstrass random walk) and its higherdimensional generalizations generate fractal trajectories if certain transience criteria are met and lead to simple analogs of deep results on the Hausdorff-Besicovitch dimension of stable processes. The Weierstrass random walk is lacunary (has gaps in the set of allowed steps) and its characteristic function is Weierstrass' non-differentiable function. Other lacunary random walks with characteristic functions related to Riemann's zeta function and certain numbertheoretic functions have very interesting analytic structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012302
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