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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of chord-length distributions (2001)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. 482-491 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A closed-form analytical solution for the inversion of the integral equation relating small-angle scattering intensity distributions of two-phase systems to chord-length distributions is presented. The result is generalized to arbitrary derivatives of higher order of the autocorrelation function and to arbitrary projections of the scattering intensity (including slit collimation). This inverse transformation offers an elegant way to investigate the impact of certain features, e.g. singularities, in the chord-length distribution or its higher-order derivatives on the scattering curve, e.g. oscillatory components in the asymptotic behavior at a large scattering vector. Several examples are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767301005098
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Optical imaging of the spatiotemporal dynamics of cerebral blood flow and oxidative metabolism in the rat barrel cortex (2004)
    Oxford, UK : Blackwell Science Ltd
    European journal of neuroscience 20 (2004), S. 0 
    Details
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Oxidative metabolism and cerebral blood flow (CBF) are two of the most important measures in neuroimaging. However, results from concurrent imaging of the two with high spatial and temporal resolution have never been published. We used flavoprotein autofluorescence (AF) and laser speckle imaging (LSI) in the anaesthetized rat to map oxidative metabolism and CBF in response to single vibrissa stimulation. Autofluorescence responses reflecting oxidative metabolism demonstrated a fast increase with a delay of 0.1 s. The sign-reversed speckle contrast reflecting CBF started to rise with a delay of 0.6 s and reached its maximum 1.4 s after the stimulation offset. The fractional signal changes were 2.0% in AF and 9.7% in LSI. Pixelwise modelling revealed that CBF maps spread over an area up to 2.5-times larger than metabolic maps. The results provide evidence that the increase in cerebral oxidative metabolism in response to sensory stimulation is considerably faster and more localized than the CBF response. This suggests that future developments in functional imaging concentrating on the metabolic response promise an increased spatial resolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1460-9568.2004.03735.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Wirbelsäulenverletzung bei Jockeys Zwei Fallberichte und Literaturübersicht (2000)
    Springer
    Der Unfallchirurg 103 (2000), S. 688-692 
    Details
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Jockey ; Pferderennen ; Wirbelkörperfraktur ; Pathomechanismus ; Reitunfall ; Key words Jockey ; Equestrian sports ; Vertebral fracture ; Pathomechanism ; Horse-racing-related injury
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Two cases of severe spinal cord injuries to professional horse-racing jockeys are presented. There is only one comprehensive study conducted to ascertain the nature and incidence of injuries in the literature. The pathomechanism and surgical therapy of vertebral trauma in jockeys was analysed.
    Notes: Zusammenfassung Es werden zwei schwere Wirbelsäulenverletzungen bei professionellen Jockeys vorgestellt. Der Pathomechanismus wurde anhand einer Videoaufzeichnung des Unfallhergangs analysiert. Die aktuellen Therapiekonzepte werden nach Darstellung der Literatur diskutiert. Die schwere Wirbelsäulenverletzung des Jockeys ist ein Arbeitsunfall und bedarf der interdisziplinären Diagnostik und Therapie.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050603
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    Paper (German National Licenses)
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