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  • 1
    ISSN: 1435-1803
    Keywords: pulmonary hypertension ; correlation pressure/media hypertrophy ; heart malformation ; morphometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An Lungen von obduzierten Kindern mit einer angeborenen Fehlbildung des Herzens oder der großen Gefäße, bei der die Entwicklung einer pulmonalen Vaskulopathie möglich ist, wurden die Gefäßflächen morphometrisch bestimmt. Es wurden Quotienten aus Mediafläche/Gesamtfläche und Mediaanteil am Gesamtdurchmesser gebildet. Als hämodynamischer Parameter wurde in allen Fällen der systolische Druckquotient (kleiner/großer Kreislauf) verwendet, bei 38 Kindern lag außerdem der Pulmonalismitteldruck und bei 25 von diesen auch der Mitteldruckquotient vor. Bei der Gegenüberstellung von morphometrischen und hämodynamischen Parametern zeigte sich ein linearer Zusammenhang mit Korrelationskoeffizienten von r=0,7. Deutliche Unterschiede in der Aussagekraft zwischen einzelnen Parametern fanden sich nicht. Eine Abnahme der Mediastärke, bezogen auf den äußeren Gefäßdurchmesser, ergab sich — jeweils gleiche Druckquotienten vorausgesetxt — mit mit zunehmendem Alter der Kinder. Unter Berücksichtigung des Alters zeigte sich eine engere Korrelation zwischen Druck und Mediastärke, besonders für ältere Kinder (r=0,90). Der Zusammenhang zwischen relativer Mediastärke und dem Druck in der A. pulmonalis fand sich nicht nur bei Herzfehlern mit Links-rechts-Shunt, sondern auch bei angeborenen Vitien mit Rückstau in die Lungenstrombahn. Die quantitativen Ergebnisse ließen eine gute Übereinstimmung mit der quantitativen Heath- und Edwards-Klassifikation erkennen.
    Notes: Summary The lungs of 68 children with malformations of the heart or the great vessels which could cause puomonary hypertension were obtained at autopsy. We analysed the mediaof muscular pulmonary arteries morphometrically and calculated the area ratio (area media/total area of the vessel). As hemodynamic parameter we used the systolic blood pressure ratio (pulmonary/systemic). Additionally we employed the mean pressure of the pulmonary artery in 38 cases. We analysed the correlation between hemodynamic and morphometric parameters and obtained a product moment correlation of 0.7. There was a linear correlation between the area and pressure ratios. Younger children showed a higher relative thickness of the media than older children with comparable pressure ratios. After dividing the children into three age groups, we obtained an even higher correlation (r=0.90 in the oldest group). We found these correlations not only in cases with left-to-right shunt but also in children with other heart defects. There was also a good correlation between the quantitatively measured data and the qualitative Heath and Edwards classification.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Clinical and experimental medicine 156 (1971), S. 195-215 
    ISSN: 1591-9528
    Keywords: Exp. peptic ulcer ; Prednisolon ; Spironolactone ; Carbenoxolon ; DOCA ; Exp. Magengeschwür ; Prednisolon ; Spironolactone ; Carbenoxolon ; DOCA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An weiblichen Sprague-Dawley-Ratten wurde mit Prednisolon ein reproduzierbares Magenulcusmodell erarbeitet. An diesem Modell wurden Therapeutica untersucht, um deren Eignung, dem Steroidulcus zu begegnen, festzustellen. Lokale Therapeutica wie tierischer, pflanzlicher, synthetischer Schleim und Marktpräparate zeigten sich ineffektiv. Hingegen erwiesen sich in der Reihenfolge ihrer Effektivität Carbenoxolon, DOCA, Aldosterone und Spironolactone als stark wirksam. Ein Elektrolyteffekt schien unwahrscheinlich. In der Diskussion wurde deshalb eingehend die Rolle des Magenschleims als protektive Barriere behandelt. Es wurden die Bindungs- und auch kompetitiven Hemmungsprobleme angesprochen, inwieweit die einen Steroide die anderen Steroide aus ihrer Proteinbindung oder an ihren Receptoren in der Zelle zu verdrängen vermögen, was sich auf die wesentliche Glykoproteinsynthese des Schleims im Magen auswirkt. Unter Prednisolon wird der Schleim minderwertig. Möglicherweise vermögen die anderen Steroide das Prednisolon zu verdrängen, der Magenschleim wird widerstandsfähiger. Soweit aus Tierversuchen ein Schluß erlaubt ist, wurde für die klinische Anwendung eine Empfehlung gegeben.
    Notes: Summary An experimental model inducing reproducibly gastric ulcer in female Sprague-Dawley rats with prednisolon is described. Several substances have been studied with regard to their possible effect to prevent the development of this type of ulcer. Locally applied substances like mucins deriving from animals or plants, synthetic mucin or commercially available antacida proved to be ineffective. A significant ulcer-preventing effect was observed in decreasing order following the application of carbenoxolon, desoxycorticosteronacetate, aldosterone and spironolactone. While there is no evidence that this effect is mediated through electrolytes, the quality of gastric mucus seems to be a very important factor of the protective principle. Prednisolon is thought to have a negative effect on the quality of gastric mucus. The possibility is discussed that some steroids with regard to others exert a competitive action for binding sites with proteins or for their receptors at a cellular level in gastric mucosa, thereby influencing the synthesis of glucoproteins of gastric mucus. In the prednisoloninduced gastric ulcer the protective effect of the substances mentioned above could be explained by this hypothetical competitive mechanism. The possible benefits from the use of these substances as a protective measure in humans is mentioned.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 42 (1950), S. 2176-2182 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 3528-3536 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report laser correlated angular distributions of K atoms scattered off an HF nozzle beam which has been partially vibrationally excited to the v=1 state by modulated infrared laser radiation. Measurements have been performed at mean relative translational energies ranging from 0.25 to 0.82 eV. As a consequence of the preparation technique the distributions directly reflect differences between the nonreactive scattering off HF in the excited state and in the ground state (v=0). The data exhibit well resolved uncommon features which are rationalized assuming spherically symmetric potentials with different well depths ε0 and ε1 for K+HF (v=0) and K+HF (v=1), respectively. Adopting the value ε0=117 meV we find ε1 =151 meV. Employing a vibrationally adiabatic model, this finding is traced back qualitatively to the difference between the vibrational energies of HF as a free molecule and in the proximity of a K atom (at well distance). Furthermore, we report angular distributions of K scattered off unprepared HF molecules (v=0) measured at mean translational energies ranging from 0.13 to 0.64 eV. In the range 0.17 to 0.38 eV the data show clearly resolved rainbow structures from which the well depth ε0 of a spherically symmetric potential is deduced. The obtained value (ε0=117 meV) is roughly a factor of 5 larger than expected from the well depths of homologous systems. However, at the lowest translational energy achievable (0.13 eV) we find another faint rainbow which we associate with a shallow well of 26 meV depth. To rationalize these results we propose a double minimum potential for K+HF and attribute the shallow and deep well to interactions of K with the H and F side of the molecule, respectively.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 84 (1962), S. 3787-3788 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 80 (1959), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 5441-5445 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of business finance & accounting 13 (1986), S. 0 
    ISSN: 1468-5957
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Chemical Physics 78 (1983), S. 369-380 
    ISSN: 0301-0104
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Ultramicroscopy 17 (1985), S. 174 
    ISSN: 0304-3991
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Natural Sciences in General , Physics
    Type of Medium: Electronic Resource
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