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  • 2000-2004
  • 1990-1994  (4)
  • 1950-1954
  • 1990  (4)
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  • 2000-2004
  • 1990-1994  (4)
  • 1950-1954
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  • 1
    Electronic Resource
    Electronic Resource
    Immunohistological localization of trypsin in mucus-secreting cell layers of Atlantic salmon, Salmo salar L. (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 13 (1990), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. Immunohistochcmical examination showed that trypsin was present in mucus-secreting cell layers of Atlantic salmon, such as surface epithelial cells of gills and intestine, and epidermal cells of dorsal skin. Trypsin in tissue slices was identified by an immunohisto-chemical technique which used affinity purified immunoglobulins from rabbit antisera against purified salmon pancreatic trypsin as primary antibodies. Most of the positively stained cells appeared to be granulated and secretory. The authors hypothesize that trypsin in mucus-secreting cell layers is a part of the non-specific immune defence of the fish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1990.tb00778.x
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  • 2
    Electronic Resource
    Electronic Resource
    HSV-1 gB and VZV gp-II crossreactive antibodies in human sera (1990)
    Springer
    Archives of virology 112 (1990), S. 203-213 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The specificity and prevalence of human IgG antibodies crossreactive between HSV-1 (ANG) and VZV (Ellen) was examined in immunoblots. Using antibody fractions purified on HSV- and VZV-coated affinity chromatography columns and by preadsorption of sera with HSV and/or VZV lysates a cross-reactivity between HSV-1 gB and VZV gp-II was demonstrated. Crossreaction of human IgG antibodies among other structural and nonstructural viral proteins, however, was not detected. The frequency of human IgG antibodies crossreactive between HSV-1 gB and VZV gp-II was highest in HSV-seropositive patients experiencing an acute primary VZV infection (4 out of 5 sera tested). In contrast, no crossreactive antibodies were found in sera of HSV-seronegative patients with acute primary VZV infection (0/6) or in sera from individuals with acute recurrent HSV or VZV infection (0/12). Analysis of sera from individuals with previous HSV and/or VZV infection showed the presence of antibodies crossreactive between HSV-1 gB and VZV gp-II in 3 out of 30 sera tested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01323165
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Zum spannungsrißkorrosionsverhalten der Aluminium-Lithium-Legierung 2091 (1990)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 41 (1990), S. 547-555 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Stress corrosion cracking tests on the aluminium-lithium alloy 2091The stress corrosion cracking (SCC) behaviour of an early material (CP274) of the Al-Li-Cu-Mg-Zr alloy 2091 was investigated. With a 39 mm thick plate in the T851 aging condition constant-strain and constant-load tests were conducted in the short transverse direction. Alternately immersed in 3,5% NaCl solution this material is found to be highly susceptible to SCC. A threshold stress below 50 MPa is measured. Using crack initiation as failure criterion the time to failure data obtained from C-ring specimens are comparable with those of uniaxial tension specimens which are considered as failed if fracture is observed. Performing constant-load tests under continuous immersion the determined SCC resistance depends upon the used corrosive environment. In 3.5% NaCl solution no SCC failure is observed whereas in an aqueous solution of 2% NaCl + 0.5% Na2CrO4 at pH = 3 a threshold stress below 100 MPa is found.Furthermore the SCC behaviour of a 1.6 mm thick sheet in two underaged heat treatments was investigated in the rolling direction. Aged 12 h at 135°C the material is very susceptible to SCC as revealed by alternate immersion tests in 3.5% NaCl solution. The SCC resistance determined using the same accelerated test is improved by aging 100 h at 150°C. SCC tests under continuous immersion in 3.5% NaCl solution indicate no SCC susceptibility if the specimens are loaded in the elastic region. Using the slow strain rate technique the alloy in both heat treatments is not susceptible to SCC if the specimens are exposed in 3.5% NaCl solution. However, slow strain rate tests in the chromate inhibited electrolyte predict a SCC susceptibility. For the alloy 2091-12 h/135°C the fracture energy which is used as parameter to indicate SCC susceptibility reveals a pronounced reduction with decreasing strain rate in the latter electrolyte compared with the values in inert environment. For the longer aged material a smaller diminution of the fracture energy is measured.
    Notes: Es wurde das Spannungsrißkorrosionsverhalten einer vorläufigen Variante (CP274) der Al-Li-Cu-Mg-Zr-Legierung 2091 untersucht. Eine 39 mm dicke Platte im warmausgelagerten Zustand T851 wurde in kurzer Querrichtung geprüft unter konstanter Verformung und konstanter Belastung. Bei alternierendem Eintauchen in wäßrige 3,5%ige NaCl Lösung erweist sich der Werkstoff als sehr anfällig für Spannungsrißkorrosion (SpRK). Die kritische Grenzspannung für Spannungsrißkorrosion liegt unter 50 MPa. Wird als Merkmal des Versagens bei C-Ring-Proben der erste Anriß und bei einachsigen Zugproben der Bruch gewählt, so ergeben diese Proben trotz unterschiedlicher Belastungsart über-einstimmende Standzeiten. Bei der Prüfung unter konstanter Belastung, bei der die Proben ständig in die korrosive Lösung eingetaucht sind, hängen die Standzeiten vom benutzten Elektrolyten ab. In 3,5%iger NaCl-Lösung zeigt der Werkstoff einen hohen SpRK-Widerstand, während in einer sauren, wäßrigen Lösung von 2% NaCl + 0,5% Na2CrO4 bei pH = 3 eine kritische Grenzspannung unter 100 MPa gefunden wird.Desweiteren wurde in Walzrichtung ein 1.6 mm dickes Blech untersucht in zwei unteralterten Zuständen: 12 h/135°C und 100 h/150°C. Die Prüfung mittels Biegeproben bei alternierendem Eintauchen in 3,5%ige NaCl-Lösung ergibt eine hohe SpRK-Empfindlichkeit des Bleches im Wärmebehandlungszustand 12 h/135°C. Mit zunehmender Warmauslagerung verbessert sich der SpRK-Widerstand. Bei ständigem Eintauchen in 3,5%ige NaCl-Lösung zeigt der Werkstoff bei Belastungen unterhalb der Streckgrenze keine SpRK-Anfälligkeit. Die Vorhersagen der Prüfung mit langsamer Dehnrate hinsichtlich des SpRK-Verhaltens hängen vom benutzten Elektrolyten ab. Während in 3,5%iger NaCl-Lösung keine Anzeichen für Spannungsrißkorrosion beobachtet werden, wird in der chromatinhibierten 2%igen NaCl-Lösung für beide Wärmebehandlungszustände eine SpRK-Empfindlichkeit gefunden. Der Abfall der Bruchenergie in Abhängigkeit der Dehnrate, der als Maß für die SpRK-Anfälligkeit dient, ist für die Wärmebehandlung 12 h/135°C besonders ausgeprägt. Der verbesserte SpRK-Widerstand des Bleches in dem warmausgelagerten Zustand 100 h/150°C wird durch einen weniger ausgeprägten Abfall der Bruchenergie wiedergegeben.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19900411002
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  • 4
    Electronic Resource
    Electronic Resource
    Cyclische Verbindungen aus Phosphor, Kohlenstoff und Schwefel (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 584 (1990), S. 159-164 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclic Compounds Made of Phosphorus, Carbon, and SulfurBy reaction of P4S10 with excess tri-n-dodecylamine and tribenzylamine bis(didodecylammonium)-3,6-diundecyl-2,5-dithioxo-1,4,2λ5,5λ5-dithiaphosphorinan-2,5-disulfide (IId) and bis(tribenzylammonium)-3,6-diphenyl-2,5-dithioxo-1,4,2λ5,5λ5-dithiaphosphorinan-2,5-disulfide (IIe), respectively, are formed. Reactions of the ammonium-3,6-dialkyl-2,5-dithioxo-1,4,2λ5,5λ5-dithiaphosphorinan-2,5-disulfides with aqueous alkali solutions and CH3I as well as their therolysis are described.
    Notes: Bei der Umsetzung von P4S10 mit überschüssigem Tri-n-dodecylamin und Tribenzylamin entstehen Bis(didodecylammonium)-3,6-diundecyl-2,5-dithioxo-1,4,2λ5,5λ5-dithiadiphosphorinan-2,5-disulfid (IId) bzw. Bis(tribenzylammonium)-3,6-diphenyl-2,5-dithioxo-1,4,2λ5,5λ5-dithiadiphosphorinan-2,5-disulfid (IIe). Reaktionen der Ammonium-3,6-dialkyl-2,5-dithioxo-1,4,2λ5,5λ5-dithiadiphosphorinan-2,5-disulfide mit wäßrigen Alkalilösungen und CH3I sowie ihre Thermolyse sind beschrieben.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905840116
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    Paper (German National Licenses)
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