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  • Articles: DFG German National Licenses  (6)
  • 1985-1989  (6)
Source
  • Articles: DFG German National Licenses  (6)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 724-726 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have successfully passivated the surface of n-type (100) GaAs on the basis of P2S5/NH4OH treatment of the surface. A fivefold increase in the photoluminescence (PL) intensity results at room temperature when the surface is passivated and the PL intensity remains the same even after ten days' exposure to room air. Current-voltage characteristic also corroborates the PL measurements and shows that the GaAs surface retains its integrity when passivated with P2S5 and its electronic characteristic remains invariant with time even after exposure to air for one month. The results are indications of the robust stability of the passivated GaAs surface.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Infection 15 (1987), S. 232-236 
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Auf der Suche nach diagnostisch verwertbaren klinischen Befunden und Laborwerten für die Früherfassung der spontanen bakteriellen Peritonitis wurden zwei Patientengruppen mit chronischer Lebererkrankung und Aszites identifiziert: 1.) 38 Patienten, bei denen 40 Episoden einer spontanen bakteriellen Peritonitis aufgetreten waren und 2.) 39 zufallsgemäß ausgewählte Patienten, bei denen 40mal durch Parazentese steriler Aszites gewonnen wurde, und die bei vergleichbar schwerer Leberfunktionsstörung als Referenzgruppe geeignet waren. Wir untersuchten eine Vielzahl klinischer und Laborparameter. In der Patientengruppe mit spontaner bakterieller Peritonitis fand sich im Mittel eine gegenüber der Referenzgruppe geringere absolute Lymphozytenzahl im peripheren Blut (Mittelwert: 703/mm3 im Vergleich zu 1.212/mm3, p〈0,005. Mit vier Laborparametern aus dem Aszites, das heißt einer Leukozytenzahl von ≥ 300/mm3, einer Granulozytenzahl von ≥ 240/mm3, einem Aszites/Serum-LDH-Quotienten von ≥ 0,4 und einem Aszites/Serum-Glukose-Quotienten von ≤ 1,0 war eine Unterscheidung zwischen spontaner bakterieller Peritonitis und der Referenzgruppe bei einer Sensitivität und Spezifität von 〉 70% möglich. Obwohl die Gesamtleukozytenzahl und Granulozytenzahl im Aszites brauchbare Hinweise für eine Frühdiagnose der spontanen bakteriellen Peritonitis liefern, muß die Möglichkeit falsch positiver Befunde bedacht werden. Die kombinierte Anwendung mehrerer Untersuchungsverfahren einschließlich der Bestimmung der Aszites/Serum-LDH- und Glukose-Quotienten erreicht einen besseren positiven prädiktiven Wert als die Anwendung eines einzelnen diagnostischen Verfahrens.
    Notes: Summary In a search for clinical and laboratory factors that would aid in early diagnosis of spontaneous bacterial peritonitis, we identified two groups of patients with chronic liver disease and ascites: 1) 38 patients with 40 episodes of spontaneous bacterial peritonitis, and 2) 39 randomly selected patients with 40 sterile paracenteses who were matched for severity of liver dysfunction as a reference group. A variety of clinical and laboratory features were examined. The absolute lymphocyte count in peripheral blood was lower for the spontaneous bacterial peritonitis group (mean=703/mm3 vs. 1,212/mm3, p〈0.005). Four ascitic fluid variables, i.e., a white blood cell count of ≥ 300/mm3, a polymorphonuclear leukocyte count of ≥ 240/mm3, an ascitic fluid/serum LDH ratio of ≥ 0.4, or an ascitic fluid/serum glucose ratio of ≤ 1.0, could separate the spontaneous bacterial peritonitis and reference groups with both sensitivity and specificity of 〉 70%. Although ascitic fluid total leucocyte and polymorphonuclear leucocyte counts are appropriate indicators for the early diagnosis of spontaneous bacterial peritonitis, the possibility of their false positivity should be warranted. The use of multiple tests including ascitic fluid/serum LDH and glucose ratios has better positive predictive value than a single test alone.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 366-381 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The alternating flow model (AFM) views dispersion in packed beds as a sequence of streamline plugs that must repeatedly split and merge as the bulk fluid traverses the vessel. Thus, the flow in the AFM is ordered, as opposed to the random flow implied by the Fickian analogy. For mass dispersion only, model parameters arise from a priori considerations of packing geometry. Steady state and transient data (5.6 〈 Dt/dp 〈 54.4, 100 〈 Rep 〈 1,000, gases and liquids) show the AFM to surpass the Fickian analogy (based on correlations for dispersion coefficients) in most cases. Further, it can describe well the radial velocity profile trends in packed beds. For heat dispersion, two additional parameters (heat transfer coefficients) arise that are not functions of packing geometry. Simple correlations for these parameters and the justifications are given. Most of the comparisons made with the literature experimental results show the AFM to be at least as good as the back-fit Fickian analogy. The AFM should be most useful for packed beds with a relatively small Dt/dp.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 32 (1986), S. 309-312 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 31 (1985), S. 1939-1946 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Platinum supported on silica is used as a model supported catalyst for the purpose of demonstrating that the selective physisortion method yields the fractional catalyst surface area of supported catalysts, inclucing metal compounds catalysts for which the method is primarily intended. The selective physisorption results with nitrous oxide as adsorbate are compared with hydrogen chemisorption results for this purpose. Experimental and theoretical refinements of the method developed earlier in our laboratory are presented that allow rather accurate determination of the catalyst surface area. The refinements also make the method effctive even when the catalyst covers a small portion of the total surface area. Because of the nature of physisorption, the method should be applicable to any supported catalyst including metal compounds catalysts, provided a suitable adsorbate is used. Adsorbates other than nitrous oxide and carbon dioxide which are suitable for selective physisorption, are suggested.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Biotechnology letters 8 (1986), S. 853-858 
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary A nuclear polyhedrosis virus ofHyphantria cunea replicated successfully in theTrichoplusia ni cell line. Restriction endonuclease analysis of the viral DNA obtained from infected cell culture showed the same general homogeneity as that from virus isolated from diseased host larvae. Electron microscopic observations showed that the occluded virus from cell culture consists of rod-like nucleocapsids (31×320 nm) enveloped in aggregates and embedded in polyhedral inclusion bodies from 0.6 to 2.5 μm in diameter.
    Type of Medium: Electronic Resource
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