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  • Electronic Resource  (3)
  • Cell Cultures  (1)
  • Computersimulation  (1)
  • Crude oil analysis  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Mund-, Kiefer- und Gesichtschirurgie 4 (2000), S. 373-376 
    ISSN: 1434-3940
    Keywords: Schlüsselwörter ; Dysgnathiechirurgie ; Operationssimulation ; Weichgewebesimulation ; Computersimulation ; Keywords ; Orthognathic surgery ; Preoperative planning ; Soft tissue simulation ; Computer-aided simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Background In addition to standard X-rays, photographic documentation, cephalometric and model analysis, a computer-aided, three-dimensional (3D) simulation system has been developed in close cooperation with the Institute of Communications of the Friedrich-Alexander-Universität Erlangen-Nürnberg. With this simulation system a photorealistic prediction of the expected soft tissue changes can be made. Prerequisites are a 3D reconstruction of the facial skeleton and a 3D laser scan of the face. After data reduction, the two data sets can be matched. Cutting planes enable the transposition of bony segments. The laser scan of the facial surface is combined with the underlying bone via a five-layered soft tissue model to convert bone movements on the soft tissue cover realistically. Conclusion Further research is necessary to replace the virtual subcutaneous soft tissue model by correct, topographic tissue anatomy.
    Notes: Hintergrund Im Rahmen eines Sonderforschungsbereichs der Deutschen Forschungsgemeinschaft (SFB 603) wurde in Zusammenarbeit mit dem Lehrstuhl für Nachrichtentechnik der Universität Erlangen-Nürnberg ein computergestütztes Simulationssystem zur dreidimensionalen, fotorealistischen Vorhersage von Weichgewebeveränderungen nach orthognathen Eingriffen entwickelt. Voraussetzung sind 3D-CT-Datensätze des Gesichtsschädels sowie eine ebenfalls dreidimensionale Laserabtastung der Gesichtsoberfläche. Beide Datensätze können nach Datenreduktion über ein mathematisches Verfahren so miteinander verknüpft werden, dass mit Hilfe so genannter “cutting planes” Verlagerungen von Knochensegmenten auf das bedeckende Weichgewebe realitätsnah übertragen werden können. Schlussfolgerung Es bedarf weiterer Forschungsanstrengungen, um auch die subkutanen Weichgewebelagen so in das Simulationsmodell zu integrieren, dass noch bestehende Abweichungen korrigiert werden können.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 50 (1972), S. 226-233 
    ISSN: 1432-1440
    Keywords: Mycoplasma ; Cell Cultures ; Mycoplasma ; Zellkulturen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Für die Forscher, die die Methodologie der Zellkulturen in bezug auf die Deutung ihrer Ergebnisse benutzen, rufen Mycoplasmen, durch ihre häufige Gegenwart in Zellkulturen viele Probleme hervor. In der übersicht werden besprochen die Wirkungen auf den Zellstoffwechsel, auf Chromosomen, Transformationen in maligne Zellen, Anheftung an und Wechselwirkung mit der Zellmembran, intracelluläre Existenz. Beziehungen von Mycoplasmen und Viren, nachgewiesene Mycoplasmen-Arten in Zellkulturen und Methoden zu ihrer Feststellung.
    Notes: Summary The presence of mycoplasmas in tissue cultures has created many problems for investigators employing cell cultures, especially with respect to the interpretation of the results. It was partly because of these problems encountered in mycoplasma-infected tissue cultures that increased attention was paid to this group of organisms and many unique interactions of these organisms with cell cultures, uncultured living cells and viruses were discovered, which have been reviewed in the present paper.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 20 (1985), S. 407-416 
    ISSN: 1612-1112
    Keywords: Gas chromatography-mass spectrometry ; Size exclusion chromatography ; Crude oil analysis ; Biodegradation ; Biological markers ; C- and H-isotopes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Microorganisms have been isolated from a biodegraded crude oil from the Gifhorn trough, Lower Saxony. A non-degraded crude oil, related to the same source rock as the biodegraded one, was inoculated with the microorganisms found and the course of biodegradation thus initiated was followed by gas and liquid chromatographic techniques. The influence of biodegradation on commonly used oil-to-oil correlation parameters was investigated in detail.
    Type of Medium: Electronic Resource
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