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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 366 (1975), S. 313-330 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Durch Homogenisieren und Ultraschallbehandlung von Schweinelungen wurden wasserlösliche Lungen-Antigene gewonnen. Die Antigene wurden mit Kollagenase oder Trypsin verdaut und anschließend auf Sephadex G 200 chromatographiert. Nach Immunisierung von Kaninchen mit bestimmten Fraktionen der chromatographisch getrennten Antigene wurden Antikörper erhalten, die sich in vitro und in vivo innerhalb des glomerulären Mesangium von Ratte, Schwein und Mensch, nicht aber an der glomerulären Basalmembran anlagerten. Eine unspezifische mesangiale Inkorporation aggregierter Immunglobuline oder Immunkomplexe wurde ausgeschlossen. Nach i.v. Injektion ließen sich die Antikörper über 55 Tage ohne wesentliche Konzentrationsabnahme innerhalb des Mesangium der Rattenniere nachweisen. Lichtoptisch konnten 5 Tage nach der Applikation von 20 mg der antikörperhaltigen IgG-Präparation an der Rattenniere keine Veränderungen nachgewiesen werden. Nach 55 Tagen fand sich immunhistologisch außer den heterologen Antikörpern auch Ratten-IgG intramesangial abgelagert. Ratten-Komplementablagerungen waren nicht eindeutig beurteilbar. Wurde Ratten die gleiche Dosis der Antikörper injiziert und gleichzeitig eine Immunisierung mit reinem Kaninchen-IgG durchgeführt, konnte nach 55 Tagen eine wesentlich stärkere Ablagerung von autologem Ratten-IgG und Ratten-Komplement beobachtet werden. Histologisch fanden sich jetzt fokale und segmentale Sklerosen des Mesangium. Eine bemerkenswerte pathologische Proteinurie trat bei den Versuchstieren nicht ein. Das beschriebene Modell bietet eine neue Möglichkeit zum Studium der Funktion des glomerulären Mesangium.
    Notes: Summary Antigens of porcine lung were prepared by homogenization and ultrasonic treatment of lung tissue. The antigens were digested by collagenase and trypsin and chromatographed on Sephadex G 200. After immunization of rabbits with certain fractions of the chromatographed material, antibodies could be obtained in rabbits which fixed in vitro and in vivo in the glomerular mesangium of rats, hogs and the human, but not in the basement membrane of glomeruli of these species. Following intravenous injection into rats, the antibodies could be observed in the mesangial area without an apparent loss of antigenicity for 55 days. While 5 days after the application of 20 mg of the anti-mesangial IgG-preparation, there were no glomerular changes histologically demonstrable, after 55 days small amounts of rat-IgG could be demonstrated histochemically within the mesangium. Deposits of ratcomplement (C3) could not be demonstrated with certainty. Severe morphological lesions were absent. Rats injected with the same dosis of antibody and simultaneously immunized with rabbit-IgG showed a substantially greater deposit of autologous rat-IgG and ratcomplement within the mesangial area after 55 days. By histological examination focal and segmental scleroses of the mesangium were determined. A significant pathological proteinuria did not occur. The present model constitutes a new possibility for studying the function of the glomerular mesangium.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 188 (1907), S. 527-550 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 13 (1962), S. 175-181 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Summary Numerical calculations for several trajectories with various initial conditions have shown that the differential effect of the temperature of the atmosphere is in general not negligible. But the usual form of the drag function leads to weighting factor curves for the ballistic temperature that are very troublesome. It is shown that the introduction of the pressure in the drag function instead of the density of the atmosphere provides a convenient way of overcoming the difficulty, e.g. in this case the temperature weighting factor curves for normal pressure distribution are the graphs of monotonic functions.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 14 (1963), S. 643-660 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Summary The paper provides a short survey of the actual state of the theoretical exterior ballistics. In particular the fundammental equations defining the motion of a rotating projectile are given in a form suitable for numerical calculation. Then, using the argument that a projectile possesses full rotational and also mirror summetry, the explicit development of the force and moment components is given in terms of the linear and angular velocities. Finally this development is compared with the experimentally known aerodynamic coefficients and stability derivatives.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 91 (1910), S. 461-478 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 91 (1910), S. 398-441 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 3 (1952), S. 241-258 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Summary Assuming a straight coarse of the target, the trajectories of beam rider antiaircraft missiles are computed for different launching intervalls. Three different guiding-systems of the jet-guided missiles are discussed by showing the necessary stearing movements.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für angewandte Mathematik und Physik 30 (1979), S. 315-325 
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung Die stroboskopische Methode ist eine semi-analytische Methode zur Lösung der Gleichungen eines gestörten dynamischen Systems welches von mehreren langsamen Variablen abhängt und einer schnellen Variablen. Es wird gezeigt, daß sich die Methode auf Approximationen höherer Ordnung verallgemeinern läßt. Eine wichtige Anwendung findet sie in der Satellitendynamik.
    Notes: Abstract The stroboscopic method is a semi-analytical method for the solution of the equations of a perturbed dynamical system depending on several slow variables and one fast variable. It is shown how this method can be generalised to higher order approximations. An important application has been made in satellite dynamics.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Celestial mechanics and dynamical astronomy 23 (1981), S. 83-87 
    ISSN: 1572-9478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this note a simple formula is given for the perturbation of the anomalistic period of a highly eccentric orbit due to the zonal harmonics. This perturbation depends essentially only on the semi-major axisa, the eccentricitye (or pericentre radius rπ =a(1-e)) and the latitude β of the pericentre.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Celestial mechanics and dynamical astronomy 2 (1970), S. 369-381 
    ISSN: 1572-9478
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A satellite with a high eccentricitye≃0.95 is strongly perturbed by the sun and the moon. This fact and mission constraints restrict considerably the possible launch times for such a satellte. The launch window calculations can be performed in two steps in order to save computing time. An approximate analytical solution provides a general survey of the launch opportunities. An accurate numerical approach is then necessary for the exact definition of the launch window. In the case of the orbit of HEOS-1 (satellite 68 10901), moreover the consideration of the injection errors has been of great importance.
    Type of Medium: Electronic Resource
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