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  • Electronic Resource  (2)
  • 68.55  (1)
  • Antimitochondrial antibodies  (1)
  • 1
    ISSN: 1432-0630
    Keywords: 68.35 ; 68.55 ; 82.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Epitaxial NiSi2 islands have been grown on Si(111) substrates by the direct reaction of nickel vapour with the silicon substrate in ultra-high vacuum at 400° C. Growth kinetics was shown to depend on the orientation of the islands: A-oriented islands grow about ten times faster than B-oriented ones, with the ratio of the advance rates of the main growth fronts even reaching 30. Applying plan-view transmission electron microscopy and high-resolution electron microscopy of cross sections, a corresponding difference was found in the structure of the NiSi2/Si(111) growth front: Steps at the B-oriented growth front were of three or six interplanar (111) spacings in height, whereas at the A-oriented growth front step-like defects of less than one interplanar (111) spacing in height were observed. These observations are explained by an atomic-scale model of the solid-state reaction, which involves the diffusion of nickel to the interfaces and the nucleation and subsequent lateral propagation of interfacial steps. The difference in the reaction kinetics originates from the presence of kinetic reaction barriers at the NiSi2/Si(111) growth fronts, the barrier at the B-front being higher owing to the lower formation rate of steps of triple atomic height than that of steps of lower height at the A-NiSi2/Si(111) growth front.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 58 (1980), S. 935-941 
    ISSN: 1432-1440
    Keywords: Pseudo-lupus-syndrome ; Antimitochondrial antibodies ; Drug induced allergy ; Pyrazolone ; Specific lymphocyte stimulation ; Pseudo-LE-Syndrom ; Antimitochondriale Antikörper ; Pyrazolon ; Medikamentöse Allergie ; Spezifische Lymphozytenstimulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 23 Patienten mit Pseudo-Lupus-Syndrom wurden die antimitochondrialen Antikörper in ihrem Titerverlauf über einen Zeitraum von bis zu 5 Jahren beobachtet. Die während der Akutphase sehr hohen AMA-Titer fielen in den meisten Fällen innerhalb der ersten 6 Monate deutlich ab. Nach Reexposition mit Venopyronum-Dragees (VPD) kam es innerhalb von 3 Tagen zu einem Anstieg der Titer bis auf das 5fache des Ausgangswertes. Das in Venopyronum-Dragees enthaltene Analgetikum Phenopyrazon ist das die Antikörper-Produktion auslösende Agens. Der Beweis dafür wurde durch entsprechende Reexpositionsversuche sowie durch die Stimulation von Patienten-Lymphozyten mit phenopyrazonhaltigen Medikamenten erbracht. Zelluläre Immunreaktionen gegenüber dem Medikament konnten bis zu 6 Monate nach akuter Krankheitsphase nachgewiesen werden, fehlten jedoch in den ersten Wochen nach dem durch das Medikament induzierten Schub. Der Übergang in eine chronische Verlaufsform war bei keinem der 23 Patienten zu beobachten. Ein Rezidiv stand immer im Zusammenhang mit einer Medikamenten-Einnahme. Auch andere pyrazonhaltige Medikamente können ein PLE-Syndrom auslösen.
    Notes: Summary 23 patients with proven pseudolupus-syndrome were observed over a period of five years; titers of specific antimitochondrial antibodies (AMA) were tested in a follow-up study after the last intake of Venopyronum-Dragees (VPD), a drug combination of plant glycosides, horse-chestnut extracts and phenopyrazone. Cellular immune reactions against the eliciting drug, depended on the date of the acute phase and were examined in two patients after reexposure. High titers in the acute phase decreased rapidly in most of the cases within the first six months. After reexposure with VPD, AMA rose within three days up to the five fold compared with the initial titer. Only the analgetic component of VPD, phenopyrazone, was able to induce a significant increase of AMA-titer after reexposure. A specific cellular sensitivity to this substance could be demonstrated by lymphocyte stimulation in the presence of a phenopyrazone containing drug preparation. There was no chronic course of the disease; clinical exazerbation could be observed only after new intake of the drug. The analysis of drug history shows, that other pyrazolone containing drugs may also be able to induce a pseudolupus-syndrome.
    Type of Medium: Electronic Resource
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