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  • Electronic Resource  (5)
  • 2000-2004
  • 1985-1989  (5)
  • 1955-1959
  • 1910-1914
  • 1988  (5)
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  • Electronic Resource  (5)
Years
  • 2000-2004
  • 1985-1989  (5)
  • 1955-1959
  • 1910-1914
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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Geostandards and geoanalytical research 12 (1988), S. 0 
    ISSN: 1751-908X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Six roches standards de I'USGS : GXR-1 à GXR-6 ont été analysées par activation neutronique instrumentale (INAA) pour le dosage de 17 éléments traces et par fluorescence X (XRF) pour les autres éléments difficiles à doser par activation neutronique. Les travaux précédemment publiés par Gladney et al. ont été pris comme référence en particulier les valeurs recommandées (R.V.) qui sont généralement en bon accord avec nos résultats. Quelques remarques et corrections sont proposées pour expliquer certaines disparités.Six United States Geological Survey's (USGS) Geochemical Exploration References Samples (GXR) have been analyzed by instrumental neutron activation analysis (INAA) for the determination of seventeen trace elements and by X-ray fluorescence spectrometry (XRFS) for other trace elements difficult to determine by INAA. Our results compare favourably with the values recommended by E.S. Gladney et al. Some suggestions and corrections are proposed to explain some discrepancies.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 75 (1988), S. 308-309 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Diese Untersuchung wurde durchgeführt um experimentell den Einfluß des thermischen Widerstandes der Rohrwand und des heizenden Mediums (innen) auf die kritische Wärmestromdichte über einen horizontalen Zylinder großen Durchmessers, der quer angeströmt wird, zu bestimmen. Die Anströmrichtung wurde senkrecht zur Erdgravitation gewählt. Die variierten Parameter waren das Rohrmaterial, die Rohrdicke, der Durchsatz des heizenden Mediums, die ungestörte Anströmgeschwindigkeit und Unterkühlung des Kühlmittels. Die experimentellen Ergebnisse wurden diskutiert und eine qualitative Erklärung für die experimentellen Befunde wurde gegeben.
    Notes: Abstract This investigation has been carried out to determine experimentally the influence of the thermal resistances of the tube wall and the heating medium (inside flow) on the critical heat flux over a cylinder of large diameter placed horizontally in a cross flow. The cross flow was normal to earth gravity. The parameters varied were the tube material, tube thickness, flow rate of heating medium, undisturbed cross velocity of the coolant and coolant subcooling. The experimental results are discussed and a qualitative explanation for the experimental findings is given.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-2013
    Keywords: Rabbit gallbladder ; Cl−/HCO 3 − , Na+/H+ uncoupling ; Bicarbonate transport ; Intracellular Na+ activity ; SITS ; Amiloride ; SCN
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The transapical Cl− influx and transepithelial Na+ transport were measured in rabbit gallbladder. Only 11.7% of the transported Na+ was found to be accompanied by HCO 3 − . 10−4 M SITS eliminated the HCO 3 − dependent fraction of Cl− influx (50%) but did not significantly alter intracellular Na+ activity and Na+ transport. Exposure to HCO3-free salines or to 10−4 M acetazolamide about halved Cl− influx and Na+ transport. 25 mM SCN− reduced Cl− influx to zero, decreased intracellular Na+ activity, but only halved Na+ transport which under these conditions was abolished only in the absence of HCO 3 − . Exposure to a Cl−-free saline produced effects similar to those caused by SCN−. These resuits suggest that when Cl−/HCO 3 − exchange is inhibited at the apical membrane, Na+/H+ exchange and transepithelial Na+ transfer are unmodified if HCO 3 − is available for transport. The permanent uncoupling of the exchangers and the elevated transepithelial transport of Na+ are not due to an increased activity of the parallel Na+−Cl− cotransport but to a redirection of HCO 3 − flux toward the basolateral side.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 36 (1988), S. 1467-1473 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Because of their incompatibility and the different refractive indices of the homopolymer components, polyurethane/polystyrene interpenetrating polymer networks are turbid by nature. Different parameters likely to enhance their transparency are examined: the crosslink density of each network and the level of internetwork grafting. The results prove that the latter factor is the most effective, as in some cases, very clear and transparent samples are obtained. Correspondingly, preliminary investigations of the dynamic mechanical properties show an inward shift of the glass transition temperatures for such systems. It is concluded that parameters able to cause a higher degree of phase dispersion can yield transparent materials.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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