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  • 11
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 314 (1980), S. 83-87 
    ISSN: 1432-1912
    Keywords: Guinea-pig ileum ; Presynaptic α-adrenoceptors ; Clonidine ; Morphine ; α-Adrenoceptor blocking agents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The purpose of the present study was to further characterize the α-adrenoceptors located on parasympathetic fibres. Segments of guinea-pig ileum were stimulated by transmural electrical pulses, and the ensuing contractions, which are due to the release of acetylcholine from postganglionic parasympathetic fibres, were monitored. Clonidine and tramazoline, which are thought to act preferentially on presynaptic α-adrenoceptors, reduced the contractions, whereas phenylephrine and methoxamine, postsynaptic α-adrenoceptor agonists, were ineffective. Contractions induced by acetylcholine were not changed by clonidine but were abolished by atropine. Yohimbine, piperoxan, phentolamine and thymoxamine reversed or prevented the inhibitory effect of clonidine. Prazosin and AR-C239 did not antagonize this effect. The inhibitory effect of tramazoline was antagonized by piperoxan but not by AR-C239 or by prazosin. Naloxone did not alter the action of clonidine, and piperoxan did not change the inhibitory effect of morphine. In conclusion, these experiments suggest the presence on cholinergic postganglionic fibres of both opiate receptors and α-adrenoceptors. The latter appear to resemble more closely α1-adrenoceptors than α1-adrenoceptors.
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 52 (1960), S. 5-13 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Die Art und Wirkungsweise von Medikamenten, die die Knochenbruchheilung beschleunigen sollen, werden besprochen. Dann wurden einige dieser Präparate im klinischen Versuch kontrolliert. Weder Vitamine, Hormone, Organpräparate, Trockenzellen, Bogomoletzserum und hyperämisierende Medikamente konnten nach unseren Ergebnissen eine wesentliche Verkürzung der Knochenbruchheilung bewirken, so daß nach wie vor für die Behandlung der Fraktur in erster Linie die klassischen Gesichtspunkte der Reposition und Fixierung gelten.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 8 (1962), S. 145-157 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Study of the literature and experimental investigations have shown that storage of blood in the ACD stabilizer is not optimal when compared with a phosphate-dextrose-saccharose stabilizer. Further it was shown that the metabolic kinetics and the speed of permeability for anions did not correspond with Arrhenius's law. The divergence was most marked below 10°C. In the usual ice-chest range of temperature (about 4°C) the difference between the course of metabolic processes and permeability leads to increase of lactic acid in the erythrocytes, causing a shift of intracellular pH. In order to intimate physiological conditions as closely as possible, it is suggested that blood should be stored in synthetic containers permitting dialysis and that it should be surrounded by a suitable dialyzable fluid.
    Notes: Zusammenfassung Wir konnten auf Grund von Literaturangaben und experimenteller Untersuchungen im Vergleich mit einem Phosphat-Dextrose-Saccharose-Stabilisator zeigen, daß die Lagerung von Blut in ACD-Stabilisator nicht den optimalen Bedingungen entspricht. Ferner wurde festgestellt, daß die Stoffwechselkinetik und die Permeabilitätsgeschwindigkeit für Anionen nicht dem Gesetz vonArrbenius gehorcht. Besonders augenfällig sind die Abweichungen bei Temperaturen unter 10°C. Die Differenz zwischen Stoffwechselablauf und Permeabilität bei den üblichen Kühlschranktemperaturen um 4°C führt zu einer starken Milchsäureanreicherung in den Erythrozyten, die eine intrazelluläre pH-Verschiebung verursacht. Um die physiologischen Bedingungen anzunähern, wird vorgeschlagen, das Blut in dialysierfähigen Kunststoffbeuteln zu lagern und mit einer geeigneten Dialysierflüssigkeit zu umspülen.
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 51 (1981), S. 9-16 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The deflection of a plane turbulent jet in a crossflow is described by a model which takes the effects of entrainment as well as those of crossflow pressure into account. Using this model the centerline and the spread of the jet and the mean velocity averaged over its cross-section can be calculated. Asymptotic analytic solutions are given for the case where the velocity of the unperturbed crossflow is much smaller than that of the unperturbed jet. A comparison of the present calculations with experimental results of other authors shows good agreement.
    Notes: Übersicht Zur Beschreibung der Umlenkung eines ebenen turbulenten Freistrahles durch eine Querströmuug wird ein Modell entwickelt, bei dem sowohl die Einsaugwirkung des Strahles als auch die Druckwirkung der Querströmung auf den Strahl berücksichtigt werden. Hiermit können die Strahlmittellinie, die Strahlbreite und die über einen Strahlquerschnitt gemittelte Geschwindigkeit berechnet werden. Es werden analytische Näherungslösungen für die Fälle angegeben, in denen die Geschwindigkeit der ungestörten Querströmung wesentlich kleiner als diejenige des ungestörten Strahles ist. Ein Vergleich der berechneten Größen mit experimentellen Ergebnissen anderer Autoren zeigt gute Übereinstimmung.
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 53 (1983), S. 337-344 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The threedimensional steady flow of an incompressible inviscid fluid around a prolate spheroid at incidence is studied. The displacement effect of the body on the uniform onset flow is represented by means of a source distribution on its surface. The modification of the flow by the lift acting on the spheroid is represented by means of a source doublet sheet on the wake surface. The comparison of the calculated pressure distribution on the surface of the spheroid with a pressure distribution measured by other authors shows that the agreement is substantially better when the lift effect is taken into account.
    Notes: Übersicht Es wird die dreidimensionale stationäre Strömung eines inkompressiblen reibungsfreien Fluids um ein schräg angeströmtes Rotationsellipsoid untersucht. Die Verdrängungswirkung des Körpers auf die ungestörte Parallelströmung wird durch eine Quellverteilung auf seiner Oberfläche beschrieben. Die Änderung der Strömung durch den Auftrieb, den er erfährt, wird durch eine Dipolschicht auf der Nachlauffläche simuliert. Der Vergleich der berechneten Druckverteilung an der Oberfläche des Ellipsoids mit einer von anderen Autoren gemessenen Druckverteilung zeigt, daß die Berücksichtigung des Auftriebseffektes zu einer wesentlich besseren Übereinstimmung führt.
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 57 (1982), S. 275-281 
    ISSN: 1432-0533
    Keywords: Spinal cord ; Conus medullaris ; Mixed chemodectoma and ganglioneuroma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Report of a 33-year-old man with a yearlong historory of low-back pain radiating into the left leg. Neurologic examination upon admission tto the hospital revealed a spinal compression syndrome at the lovel L5. Laminectomy at L4/5 revealed an encapsulated intradural tumor measuring 4×2.5×2.5 cm. The tumor was attached to the dorsal root L4 and extended downward to the conus region. Light and electron microscopy revealed features mostly consistent with a mixed chemodectoma and ganglioneuroma.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 25 (1981), S. 195-200 
    ISSN: 1432-0630
    Keywords: 77
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Thin sections in the thickness range down to 3–5 μm were produced from bariumtitanate ferroelectric ceramics. The small signal dielectric constant, as well as hysteresis loops were measured. Significant deviations from the bulk properties were observed, when the thickness of the sample was decreased to the average diameter of the grains. The measured results are discussed proposing a model with internal stresses and a distorted surface layer.
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 143 (1984), S. 73-73 
    ISSN: 1432-1076
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 143 (1984), S. 74-74 
    ISSN: 1432-1076
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 40 (1962), S. 921-928 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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