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  • 1990-1994  (13)
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  • 11
    ISSN: 1573-482X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Maschinenbau
    Notizen: Abstract (C5H5)2Fe and Fe(CO)5 were used as the 3d transition-metal dopant sources in the growth of semi-insulating InP epitaxial layers by low-pressure metal-organic chemical vapour deposition (MOCVD). From the bright- and dark-field images of transmission electron microscopy (TEM) analysis, many precipitates were observed. Three extra peaks in the X-ray diffraction pattern were found. The peaks of band-band recombination, donor-acceptor pair recombination transitions and the recombination of donor-acceptor pair with one-phonon emission were observed in the short-wavelength range of low-temperature photoluminescence measurement. Three Fe-related peaks were observed at 0.7079, 0.6897 and 0.6683 Ev. For a wide range (10–600) of In/Fe molar fraction, the resistivity remained at high values (about 108 Ω cm) and the highest resistivity appeared at 5 × 108 Ω cm for a 1 Μm layer with a breakdown voltage of 9 V.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 12
    Digitale Medien
    Digitale Medien
    Springer
    Archives of orthopaedic and trauma surgery 111 (1992), S. 160-164 
    ISSN: 1434-3916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary In a prospective study from December 1986 to August 1989, 17 consecutive patients with femoral shortening due to aseptic nonunion of femoral shaft fractures were treated with limitedly open Gross-Kempf locking nailing with a lengthening procedure. Patients were followed up for at least 1 year (average 25 months). There was a 88.2% union rate with an average union period of 5.2 months. Average lengthening was 2.4 cm (1.0 ∼ 3.0 cm) , and average operation time 90 min (70 ∼ 130min). The blood loss was slight (average 200ml). Complications (11.8%) were 5.9% implant failure and 5.9% nonunion which were not difficult to manage. No neurovascular complications were noted. We conclude that for 5 cm shortening or less in femoral aseptic nonunion, this treatment constitutes the simplest technique and can achieve a very satisfactory result.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 13
    Digitale Medien
    Digitale Medien
    Springer
    Archives of orthopaedic and trauma surgery 112 (1992), S. 28-32 
    ISSN: 1434-3916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary We treated 66 consecutive type IV comminuted femoral shaft fractures with static Grosse-Kempf interlocking nails and followed them up for at least 1 year (median 27 months). Although the effect of weight bearing was completely lost, 60 fractures healed primarily without dynamization. We conclude that weight bearing contributes only an auxiliary role in promoting fracture healing, and that the most decisive role is adequate mechanical stability with sufficient nutrition.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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