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  • 1995-1999  (3)
  • 1995  (3)
Material
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  • 1995-1999  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 6241-6248 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Epitaxial growth of erbium-doped silicon films has been performed by plasma-enhanced chemical vapor deposition using an electron-cyclotron-resonance source. The goal was to incorporate erbium as an optically active center (ErO6) through the use of metal-organic dopant sources. The characteristic 1.5 μm emission was observed by photoluminescence. Chemical analysis of the film revealed, however, that the organic ligands were decomposing and contributing to the carbon contamination of the films. Analysis of the molecular flux to the substrate indicated that the metal-organic compound used, tris(2,2,6,6-tetramethyl-3-5-heptanedionato)erbium(III), was most likely to decompose, and supply unbonded atomic erbium and not the optical active species, ErO6. Excessive carbon contamination lowered epitaxial quality and reduced the photoluminescent intensity. Photoluminescent intensity was improved by a 600 °C anneal but was strongly quenched by a 900 °C anneal. The low-temperature anneal improved crystal quality, and the high-temperature anneal resulted in silicide formation. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Macromolecules 28 (1995), S. 3282-3289 
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Monozyten besitzen eine Schlüsselrolle bei der Immunantwort auf Trauma und Infektion. Kann eine Änderung der Monozytenfunktion bereits präoperativ nachgewiesen werden? Zum Zeitpunkt der stationären Aufnahme lagen die Serum-Neopterinspiegel bei 52% von 227 elektiven, abdominal-chirurgischen Patienten über 9 nmol/l und Serum-IL-6 war bei 10,5% nachweisbar (über 4 pg/ml). Die Mittelwerte von CRP (0,8 vs. 3,6 mg/dl), α-1-Antitrypsin (267 vs. 376 g/l), Albumin (4,0 vs. 3,5 g/dl), Präalbumin (27,0 vs. 17,9 mg/dl, alle p〈0,01) unterschieden sich signifikant bei Patienten mit und ohne Monozytenaktivierung (Neopterin 〉 9 nmol/l und IL-6〉4 pg/ml). Zwischen Neopterin und den Akute-Phase-Proteinen bestand eine signifikante Korrelation (alle p〈0,01). Bereits präoperativ konnte bei einer Gruppe von Patienten eine Aktivierung von Teilbereichen des Immunsystems nachgewiesen werden, die potentiell die Immunantwort auf das operative Trauma und die intraund postoperative bakterielle Kontamination beeinflußt.
    Notes: Summary Monocytes play a key role in the immune response to trauma and infection. Is monocyte function already altered before surgery in terms of cell activation? On admission, serum neopterin was at or above 9 nmol/l in 50.2% and serum IL-6 was detectable (〉 4 pg/ml) in 10.5% of 227 patients electively undergoing major abdominal surgery. Mean values of CRP (0.8 vs. 3.6),α-1-antitrypsin (267 vs. 376), albumin (4.0 vs. 3.5), prealbumin (27.0 vs. 17.9, all at p〈0.01) were significantly different in patients with or without monocyte activation (neopterin 〉 9 nmol/l and IL-6〉4 pg/ml). There was a significant correlation between neopterin and the acute phase proteins (all at p〈0.01). The data reflect a “primed” state at least of some parts of the immune system in a subgroup of preoperative patients potentially affecting their response to surgical trauma and bacterial contamination.
    Type of Medium: Electronic Resource
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