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  • 1
    Electronic Resource
    Electronic Resource
    In situ optical assessment of semi-insulating iron doped InP grown by liquid encapsulated Czochralski process (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 6777-6781 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In semi-insulating, Fe doped InP, we demonstrate that infrared absorption technique provides quantitative measurements of Fe concentrations. We show that the quantum efficiency is reduced more than 70% in Fe doped samples, in comparison to undoped samples. Relative near band edge photoluminescence (PL) intensity is antiproportional to Fe concentration. This can provide a calibration method to transform scanning PL images to quantitative Fe distributions. We demonstrate that infrared absorption mapping images Fe distribution in InP, in a similar way to EL2 imaging in GaAs. The images show that the slip-like defects decorated by Fe centers predominantly lie along [011] direction. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370193
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Serum-Soluble Selectin Levels in Patients with Rheumatoid Arthritis and Systemic Sclerosis (2004)
    Oxford, UK; Malden , USA : Blackwell Science Ltd
    Scandinavian journal of immunology 59 (2004), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Soluble forms of selectins may play a regulatory role in inflammatory responses that are key to the pathophysiology of rheumatic diseases such as rheumatoid arthritis (RA) and systemic sclerosis (SSc). The aim of this study was to examine whether the elevated serum-soluble (s) selectin levels are associated with RA or SSc. Serum sE-, sL- and sP-selectin levels were measured by sandwich enzyme-linked immunosorbent assay in 34 RA patients, 30 SSc patients and 16 healthy subjects. The levels of sE-selectin were significantly higher in RA and SSc patients than those in healthy subjects. The sL-selectin level was significantly lower in RA patients compared to healthy subjects. Serum sP-selectin levels were not significantly different among the study groups. The active RA patients had significantly higher serum sE- and sL-selectin levels compared to inactive RA patients. Also, some correlations were observed between the serum selectin levels and measures of disease activity such as erythrocyte sedimentation rate and C-reactive protein in RA patients. The higher levels of sE-selectin were found in SSc patients with pulmonary fibrosis, and there was also a negative correlation between diffusion capacity for carbon monoxide and serum sE-selectin. Serum levels of selectins may provide a useful additional marker for disease activity in RA patients and for disease severity in SSc patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.0300-9475.2004.01389.x
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  • 3
    Electronic Resource
    Electronic Resource
    The recent expansion of Pluto's atmosphere (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 424 (2003), S. 165-168 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Stellar occultations—the passing of a relatively nearby body in front of a background star—can be used to probe the atmosphere of the closer body with a spatial resolution of a few kilometres (ref. 1). Such observations can yield the scale height, temperature profile, and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature01762
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    Paper (German National Licenses)
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