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  • Articles: DFG German National Licenses  (14)
  • 1990-1994  (7)
  • 1940-1944  (7)
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  • Articles: DFG German National Licenses  (14)
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Implantation temperature effect on polycrystalline silicon by ion shower doping (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 7114-7117 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a new doping technique using an ion shower doping system with a bucket ion source. Phosphorus atoms were implanted in polycrystalline silicon from room temperature to 300 °C. Sheet resistances were significantly reduced by raising the implantation temperature. With a crystal fraction of 85%, sheet resistance was 5×102 S−1/(D'Alembertian) as implanted. These effects were not due to pure thermal annealing by ion beam heating. A significant improvement was found in sheet resistance as a result of averaging the impurity profile by radiation enhanced diffusion and low temperature recrystallization of the implanted region by collision of atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355026
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mechanism of inhibition of IgE-dependent histamine release from rat mast cells by xestobergsterol A from the Okinawan marine spongeXestospongia bergquistia (1993)
    Springer
    Cellular and molecular life sciences 49 (1993), S. 145-149 
    Details
    ISSN: 1420-9071
    Keywords: Xestobergsterol A ; histamine release ; PI-PLC ; IP3 ; signal transduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Histamine release from rat peritoneal mast cells induced by anti-IgE was essentially complete within 4–5 min. Xestobergsterol A and B, which are constituents of the Okinawan marine spongeXestospongia bergquistia Fromont, dose-dependently inhibited anti-IgE-induced histamine release from rat mast cells. The IC50 values of xestobergsterol A and B for histamine release in mast cells activated by anti-IgE were 0.07 and 0.11 μM, respectively. Anti-IgE stimulated PI-PLC activity in a mast cell membrane preparation. Xestobergsterol A dose-dependently inhibited the generation of IP3 and membrane-bound PI-PLC activity. Moreover, xestobergsterol A inhibited Ca2+-mobilization from intracellular Ca2+-stores as well as histamine release in mast cells activated by anti-IgE. On the other hand, xestobergsterol B did not inhibit the membrane-bound and cytosolic PI-PLC activity, IP3 generation or the initial rise in [Ca2+]i in mast cells activated by anti-IgE. These results suggest that the mechanism of inhibition by xestobergsterol A of the initial rise in [Ca2+]i, of the generation of IP3, and of histamine release induced by anti-IgE, was through the inhibition of PI-PLC activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01989419
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A toxic substance from the sea urchinToxopneustes pileolus induces histamine release from rat peritoneal mast cells (1991)
    Springer
    Inflammation research 32 (1991), S. 224-228 
    Details
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A toxic substance (P-II fraction), fractionated from the pedicellariae of the sea urchinToxopneustes pileulus, dose-dependently caused the histamine release from rat peritoneal mast cells. The histamine release induced by P-II fraction increased with time, while compound 48/80 caused a more rapid histamine release. The dose-response curve for P-II fraction was studied with concentration 0.03–2.0 mg/ml. This reaction was dependent on Ca2+ and temperature. When glucose (5.5. mM) was omitted during the incubation step, the histamine release induced by P-II fraction was significantly reduced as compared to that of compound 48/80. Pyruvate reversed this reduction. On the other hand, the histamine release induced by P-II fraction was effectively potentiated by the addition of glucose (11.0 mM), but not that by compound 48/80. These results suggest that P-II fraction-induced histamine release differs from that of compound 48/80 disregards to the effects of glucose, because this histamine release appears to be more sensitive to the glycolytic pathway than compound 48/80-induced histamine release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01980878
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of dantrolene on histamine release from rat peritoneal mast cells (1991)
    Springer
    Inflammation research 32 (1991), S. 213-216 
    Details
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Dantrolene strongly and dose-dependently inhibited histamine release from rat peritoneal mast cells induced by anti-IgE. Dantrolene inhibited Ca2+-mobilization from intracellular Ca2+-store as well as histamine release in mast cells activated by anti-IgE, the effect on both of these phenomena being closely correlated. These results suggested that the effect of dantrolene on histamine release from rat mast cell might be due to the inhibition of Ca2+-release from intracellular Ca2+-store.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01980876
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    über die FÄllungstitration von Azetylzellulose (1942)
    Springer
    Colloid & polymer science 101 (1942), S. 59-64 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01519966
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Über die Konzentrationsabhängigkeit der Viskosität bei organischen Hochpolymeren (1941)
    Springer
    Colloid & polymer science 95 (1941), S. 322-326 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Es wird eine Korrekturformel zur 8. Potenzformel von Philippoff-Heß vorgeschlagen, die auch die Fälle gut wiedergibt, wo die einfache 8. Potenzformel ebenso wie andere Viskositätsgleichungen bisher versagten. Im einzelnen wird die Gleichung geprüft an folgenden bisherigen „Ausnahmen“: Cellit in Eisessig (Philippoff-Heß), polymereω-Hydroxydekansäuren in sym-Tetrachloräthan(Kraemer-von Natta), polymere Polystyrole in Benzol (Daneš). In jedem Falle stellen diek-Werte gute Konstanten dar. Die „charakteristische Viskositätskonstante“k zeigt eine lineare Zunahme mit dem Molekulargewicht der Polymerhomologen. Die Temperaturabhängigkeit vonk unda wird geprüft.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01511873
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Assoziation und Solvatation bei Azetylzellulose, nach dielektrischen Messungen (1941)
    Springer
    Colloid & polymer science 96 (1941), S. 336-340 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung 1. Die spezifische Polarisation von Azetylzellulose in Dioxan wird gemessen. Sie zeigt eine Abnahme mit der Konzentration. 2. Die Konzentrationsunabhängigkeit der Polarisation von Azetylzellulose in Dipollösungsmitteln wird diskutiert. Sie wird erklärt 1. auf Grund einer Konzentrationskonstanz der Solvatation und 2. auf Grund einer Assoziationshemmung durch Solvatation mit polaren Lösungsmittelmolekülen. 3. Die spezifische Polarisation in AzetonMethanol-Gemischen wird gemessen und gleichfalls konstant gefunden. 4. Es werden neue Solvatationszahlen für Azetylzellulose mitgeteilt, die zwischen 3 und 6 Lösungsmittelmolekülen pro 1 C6-Gruppe liegen. 5. Es wird ein kurzer Hinweis gegeben, bei der Solvatation der Azetylzellulose sowohl chemische wie physikalisch-statistische Wirkungen zu berücksichtigen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01502044
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Über den Lösungszustand von Hochpolymeren (1942)
    Springer
    Colloid & polymer science 98 (1942), S. 312-318 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung 1. Die Löslichkeit von Zellulosederivaten (z. B. Nitrozellulose, Azetylzellulose sowie gemischter Nitroazetylzellulosen) wurde unter dem Gesichtspunkt der Abhängigkeit von Dipolmoment, Dielektrizitätskonstante und Oberflächenspannung der Lösungsmittel betrachtet. Es wird hierzu die von Takei-Erbring aufgestellte Funktionμ 2/ɛσ benutzt, die eine Aussage gestattet über das Lösungsgebiet der einzelnen Zelluloseester. So löst sich Azetylzellulose in Lösungsmitteln kleinerμ 2/ɛσ-Werte, Nitrozellulose dagegen in Gebieten großerμ 2/ɛσ-Werte, so daß von der Triazetyl- zur Trinitrozellulose ein durchaus systematisch sich verschiebendes Lösungsband beobachtet wird. Dinitrozellulose und Diazetylzellulose besitzen bei mittleren Werten ein gemeinsames Lösungsgebiet. 2. Um den Übergang der Löslichkeit von Azetylzellulose zur Nitrozellulose noch näher zu betrachten, wurden verschiedene Nitroazetyizellulosen hergestellt. Die hiermit durchgeführten Löslichkeitsuntersuchungen beweisen, daß eine regelmäßige Löslichkeitsverschiebung besteht, derart, daß der Zelluloseester um so leichter in Lösung geht in Lösungsmitteln großerμ 2/ɛσ- Werte, je mehr Nitrogruppen er im Molekül enthält. 3. Die voranstehende Gesetzmäßigkeit wurde an Hand quantitativer Löslichkeitsbestimmungen der verschiedenen Zellulosederivate in homologen Essigestern bestätigt. 4. Das Lösungsgebiet der Nitrozellulose ist abhängig von ihrem Stickstoffgehalt. Je niedriger die Zellulose nitriert ist, um so mehr verschiebt sich das Lösungsgebiet nach Gebieten kleinererμ 2/ɛσ-Werte.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01496525
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Über die Konzentrationsabhängigkeit der Viskosität bei Azetylzellulose (1941)
    Springer
    Colloid & polymer science 95 (1941), S. 207-211 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01521461
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Increased soluble IL-2 receptor in serum of patients with systemic lupus erythematosus (1993)
    Springer
    Clinical rheumatology 12 (1993), S. 204-209 
    Details
    ISSN: 1434-9949
    Keywords: sIL-2R ; sCD4 ; sCD8 ; SLE
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We estimated the concentration of soluble IL-2R (sIL-2R) in the serum of patients with systemic lupus erythematosus (SLE) and examined the relationship between the serum levels of sIL-2R and clinical features or laboratory data. We found that elevated levels of sIL-2R were present in the serum of SLE patients with discoid rash, and sIL-2R concentrations were correlated with the soluble CD4 and soluble CD8 concentrations but not with classical serological marker, anti-DNA antibody or complement titer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02231527
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    Paper (German National Licenses)
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