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Träfflista för sökning "WFRF:(Schubert T) srt2:(2000-2004)"

Sökning: WFRF:(Schubert T) > (2000-2004)

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1.
  • Axelson, Olav, 1937-, et al. (författare)
  • Regulatory toxicology and pharmacology.
  • 2003
  • Ingår i: International journal of occupational and environmental health. - 1077-3525 .- 2049-3967. ; 9, s. 386-389
  • Tidskriftsartikel (refereegranskat)
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2.
  • Kasic, A., et al. (författare)
  • Phonons and free-carrier properties of binary, ternary, and quaternary group-III nitride layers measured by infrared Spectroscopic Ellipsometry
  • 2003
  • Ingår i: Physica Status Solidi. C, Current topics in solid state physics. - : Wiley. - 1610-1634 .- 1610-1642. ; 0:6 SPEC. ISS., s. 1750-1769
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • This work reviews recent ellipsometric investigations of the infrared dielectric functions of binary, ternary, and quaternary group-III nitride films. Spectroscopic Ellipsometry in the mid-infrared range is employed for the first time to determine phonon and free-carrier properties of individual group-III nitride heterostructure components, including layers of some ten nanometer thickness. Assuming the effective carrier mass, the free-carrier concentration and mobility parameters can be quantified upon model analysis of the infrared dielectric function. In combination with Hall-effect measurements, the effective carrier masses for wurtzite n- and p-type GaN and n-type InN are obtained. The mode behavior of both the E1(TO) and A1(LO) phonons are determined for ternary compounds. For strain-sensitive phonon modes, the composition and strain dependences of the phonon frequencies are differentiated and quantified. Information on the crystal quality and compositional homogeneity of the films can be extracted from the phonon mode broadening parameters. A comprehensive IR dielectric function database of group-III nitride materials has been established and can be used for the analysis of complex thin-film heterostructures designed for optoelectronic device applications. Information on concentration and mobility of free carriers, thickness, alloy composition, average strain state, and crystal quality of individual sample constituents can be derived. © 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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3.
  • Nord, M., et al. (författare)
  • Decreased serum and bronchoalveolar lavage levels of Clara cell secretory protein (CC16) is associated with bronchiolitis obliterans syndrome and airway neutrophilia in lung transplant recipients
  • 2002
  • Ingår i: Transplantation. - : Ovid Technologies (Wolters Kluwer Health). - 0041-1337. ; 73:8, s. 1264-9
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The major hinderance for long-term survival after lung transplantation is chronic rejection in the form of bronchiolitis obliterans syndrome (BOS). BOS is a fibrosing process in the small airways causing irreversible airway obstruction. BOS is associated with increased oxidative burden and activation of inflammatory and growth-stimulating mediators. The Clara cell secretory protein (CCSP or CC16) is a secreted differentiation marker for the bronchiolar epithelium with both antioxidative and antiinflammatory/immmunomodulatory properties. We asked whether this molecule could have a role in the development of BOS. METHODS: Serum and bronchoalveolar lavage (BAL) fluid samples were collected from 22 consecutive lung transplant recipients, the majority (19) was followed for 2 years. Six patients developed BOS. CCSP in serum was measured in 162 samples from 19 patients with an ELISA method, and CCSP in 191 BAL samples from 22 patients with quantitative Western blot. RESULTS: CCSP in both serum and BAL was significantly lower in BOS compared with acute rejection or no rejection. After the first postoperative month, serum and BAL CCSP levels were consistently lower in the patients who developed BOS than in those who did not. The percentage of neutrophils in BAL correlated negatively with CCSP in BAL. CONCLUSIONS: Levels of CCSP in serum and BAL is lowered in BOS. Serum CCSP could have a potential as an early marker for BOS. The correlation between decreased CCSP and increased neutrophils in BAL suggests a loss of local airway defense capacity in BOS.
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