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  • Electronic Resource  (6)
  • 1970-1974  (6)
  • 1960-1964
  • 1905-1909
  • 1971  (4)
  • 1970  (2)
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  • Electronic Resource  (6)
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  • 1970-1974  (6)
  • 1960-1964
  • 1905-1909
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 181 (1971), S. 216-227 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An einem experimentell erzeugten Hornhautödem bzw. an normalen Hornhäuten von Kaninchen wird die Wirkung von Glucose- und Glycerinlösungen unterschiedlicher Konzentration verglichen. Als Maß des Quellungsgrades dient die Hornhautdicke, die mit einem Meßgerät eigener Anfertigung in Anlehnung an das Gerät von Jäger registriert wird. Es wurden folgende Ergebnisse erzielt: 1. Die normale Kaninchenhornhaut konnte sowohl durch Glucose- als auch durch Glycerinlösung bis etwa auf 50% der Normaldicke entquollen werden. 2. Glucoselösungen wirkten auf das experimentell erzeugte Hornhautödem stärker entquellend als glycerinlösungen gleicher Osmolarität. 3. Eine geringe regenerationsfördernde Wirkung auf das Corneaendothel konnte bei Glycerinbehandlung deutlicher nachgewiesen werden als bei Glucoselösung vergleichbarer Konzentration. Aus den Ergebnissen folgt, daß sich Glycerin ebenso wie Glucose zur Entquellung eines Hornhautödems eignet. Eine Entscheidung über die Verwendbarkeit von Glycerinlösung beim Hornhautödem des Menschen erfordert weitere Untersuchungen.
    Notes: Summary The effect of glucose and glycerine solutions of different concentrations was examined on a corneal oedema produced experimentally and on normal corneae of rabbits, respectively. The swollen cornea was measured by means of a home-made device similar to that described by Jäger! The following results were obtained: 1. By instillation of glucose as well as glycerine solutions it was possible to reduce the thickness of the normal rabbit cornea to 50% of the original value. 2. Glucose solutions showed a more dehydrating effect on the experimentally produced corneal oedema than glycerine solutions of the same osmolarity. 3. A slight effect favouring the regeneration of the corneal endothelium could be seen more distinctly after treatment with glycerine than after the instillation of glucose solutions of comparable concentrations. It is concluded that glycerine and glucose are equally suitable for dehydrating a corneal oedema. Further investigations, however, are necessary before glycerine solutions can be used in human corneal oedemata.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 43 (1971), S. 309-315 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A qualitative comparison was made of the genera of fungi associated with creeping bentgrass turf (Agrostris palustris) plots either nonsprayed or sprayed with six fungicides for 4 or 5 successive years. The fungicides used were: Fore (manganese ethylene bisdithiocarbamate plus zinc ion) Actidone-Thiram (3[2-(3, 5-dimethyl-2-oxycyclohexyl)-2-hydroxy-ethyl]) glutarimide plus tetramethyl thiuram disulfide); Dyrene (2, 4-dichloro-6-0-chloroanillino-s-triazine; Kromad plus Calaclor (5% cadmium sebacate, 5% potassium chromate, 1% malachite green, 0.5% auramine, 16c tetramethyl thiuram disulfide plus 60% mercurous chloride, 30% mercuric chloride); PMA plus Thiram (phenylmercuric acetate plus tetramethyl thiuram disulfide); and Tersan OM (hydroxymercuric chlorophenol plus tetramethyl thiuram disulfide). None of the fungicides had any significant effect on the distribution of fungal genera studied.
    Type of Medium: Electronic Resource
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  • 3
    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 stability-theory of helical flows in the narrow gap between coaxial cylinders is extented to the hydromagnetic case. The inviscid fluid is supposed to be ideally conducting and is influenced by an axial magnetic field. The investigation of the stability leads to an eigenvalue-problem of a linear differential-equation of second order, which can be solved analytically only for special disturbances. For arbitrary disturbances numerical methods are required. The results show that in the presence of a magnetic field weak instabilities always exist.
    Notes: Übersicht Es wird die Theorie der Stabilität spiraliger Strömungen im schmalen zylindrischen Ringraum auf den hydromagnetischen Fall erweitert. D. h. die reibungsfreie Flüssigkeit wird zusätzlich als elektrisch unendlich leitfähig vorausgesetzt und steht unter der Wirkung eines axialen Magnetfeldes. Die Stabilitätsuntersuchung führt auf ein Eigenwertproblem einer linearen Differentialgleichung zweiter Ordnung. Dieses Problem kann nur für spezielle Störungen analytisch gelöst werden. Für allgemeine Störungen müssen die Eigenwerte numerisch bestimmt werden. Die Rechnung ergibt, daß in Anwesenheit eines Magnetfeldes immer schwach angefachte Störungen auftreten.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Mathematische Annalen 193 (1971), S. 315-321 
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 329 (1971), S. 984-985 
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Der Vorteil der vorliegenden Perfusionsstudie des Pankreas in vitro ist der, daß er eine Vorhersage der funktionellen Lebensfähigkeit des perfundierten Pankreas in direkter Beziehung zur spezifischen Organfunktion erlaubt. Das Pankreas mit Duodenum wurde Hunden entnommen und für 3 Std mit einer Blut-Ringer-Lactatlösung mit einem Membranoxygenator, einer Pulspumpe und einem Wärmeaustauscher bei 37°C perfundiert. Aufgrund der vorliegenden Untersuchungen erweisen sich der Insulinausstoß nach Glucosegabe und die Pankreassekretion nach Sekretin-Reiz als besonders zuverlässige Kriterien in der Beurteilung der Lebensfähigkeit des Organs. Der durchschnittliche Sauerstoffverbrauch des Pankreas liegt bei 0,77 ml 02/100 g. Ein durchschnittlicher Flow von 80 ml/min bei einem Druck von 75 mm Hg erweist sich in der vorliegenden Versuchsanordnung als nützlich. Makroskopische und histologische Untersuchungen bestätigen die Ergebnisse.
    Notes: Summary An advantage of the current perfusion-test in vitro is that it allows prediction of the functional viability of the perfused pancreas in direct relation to the specific organ function. The canine pancreas including the duodenum has been perfused for 3 h with a membrane oxygenator, a pulsatile pump and a heat exchanger at a temperature of 37°C. Among the criteria used in this study the insulin-output into the venous blood in response to glucose administration as well as pancreassecretion after secretin stimulation were found to be the most reliable indications as to the viability of the pancreas. This is further supported by an average oxygen consumption of 0.77 ml 02/100 g at a constant flow of 80 ml/min and a pressure of 75 mm Hg, and the macroscopical and histological findings.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2-Chloromethylbutadiene has been converted to quaternary ammonium and sulfonium monomers which have been polymerized at room temperature. They show a very great tendency to dimerize on heating in water solution. The aqueous quaternary monomer dimerized 25 times as fast as the aqueous sulfonium monomer and nearly 105 times as fast as neat isoprene at 50°C. The quaternary monomer dimerized with itself in a water solution to which 2-hydroxymethylbutadiene has been added as an example of a nonionic diene. The latter monomer did not dimerize rapidly in water, nor did 2-aminomethylbutadiene. The hydrochlorides of 2-aminomethylbutadiene and 2-dimethylaminomethylbutadiene dimerized at rates comparable to that of the sulfonium monomer. Poly 2-chloromethylbutadiene contains reactive chlorine except for the structure resulting from the minor extent of 1,2 addition. Water-soluble derivatives have been made from it with nucleophilic tertiary amines and sulfides. Cationic polymers are substantive to paper pulp, and the sulfonium polymers can be cured in paper to give improved wet strength.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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