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  • DSC  (2)
  • Digital image processing  (2)
  • 71.70J  (1)
  • Anaerobic bacteria  (1)
  • Springer  (6)
  • 1
    ISSN: 1434-3940
    Keywords: Schlüsselwörter ; Odontogene Infektionen ; Anaerobe Keime ; Penizillinresistenz ; Key words ; Odontogenic infections ; Anaerobic bacteria ; Resistance to penicillin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Out of 440 dentogenic pyogenic infections, 171 exclusively caused by anaerobes were investigated to understand the importance of anaerobic bacteria in dental pyogenic processes better. Grampositive anaerobic bacteria dominated. The predominant grampositive isolates in monoinfections were Peptostreptococci and in the case of mixed infections, strains of the genus Eubacterium. Strains of Prevotella and Porphyromonas dominated the gramnegative anaerobic spectra. The resistance to penicillin was very low. Altogether, only one strain of Prevotella oris and one strain of Prevotella oralis showed resistance to penicillin.
    Notes: Zum besseren Verständnis der Bedeutung einzelner anaerober Spezies bei odontogenen pyogenen Infektionen wurden von 440 Fällen jene 171 ausgesucht, bei denen ausschließlich anaerobe Keime mikrobiologisch nachgewiesen werden konnten. Hierbei dominierten grampositive Spezies im Vergleich zu gramnegativen. Bei anaeroben Mischinfektionen überwogen unter den grampositiven Keimen Stämme des Genus Eubacterium, bei Monoinfektionen hingegen Stämme des Genus Peptostreptococcus. Unter den gramnegativen Anaerobiern wurden am häufigsten Prevotella- und Porphyromonasarten isoliert. Bei den 171 odontogenen Infektionen wurde eine sehr niedrige Quote penizillinresistenter Stämme beobachtet. Nur 2 Stämme von Prevotella oris bzw. Prevotella oralis waren gegenüber Penizillin resistent.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-6079
    Keywords: 76.30F ; 76.30H ; 71.70J
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The possibilities to identify small diluted paramagnetic cluster defects in solids by Electron Paramagnetic Resonance are demonstrated in two examples: the Mn 4 0 cluster and a Cu-Au cluster in silicon crystals. A comprehensive picture of the clusters can be given containing the chemical nature of the constituents, the spatial arrangement, the charge states and the electronic structure.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Informatik-Spektrum 10 (1987), S. 192-204 
    ISSN: 1432-122X
    Keywords: Digitale Bildverarbeitung ; Computer-Graphik ; dreidimensionale Darstellung ; medizinische Diagnostik ; Computertomographie ; Kernspintomographie ; Digital image processing ; Computer graphics ; Three-dimensional display ; Medical diagnostics ; Computer tomography ; Magnetic resonance tomography ; I.4 ; J.3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Summary The classical imaging modalities in medicine deliver only two-dimensional views of a three-dimensional reality. Using techniques of image processing and computer graphics, it is possible to reconstruct medical objects from spatial image sequences and to show arbitrary views on a display screen. For this purpose the volume of primary data has to be segmented into the objects and a data structure suitable for the display operation has to be generated. The methods are described and illustrated with applications in diagnostic radiology, surgery, orthopedics, and anatomy. Finally the problems of implemention for routine application are discussed.
    Notes: Zusammenfassung Die klassischen medizinischen Abbildungsverfahren liefern nur zweidimensionale Ausschnitte aus einer dreidimensionalen Wirklichkeit. Mit Hilfe der digitalen Bildverarbeitung und der Computer-Graphik ist es jedoch möglich, medizinische Objekte aus räumlichen Bildfolgen zu rekonstruieren und wählbare Ansichten auf einem Bildschirm darzustellen. Zu diesem Zweck muß das Datenvolumen in die darzustellenden Objekte segmentiert und in eine für die Darstellung geeignete Datenstruktur übergeführt werden. Die Verfahren hierfür werden erläutert und mit Anwendungen aus der radiologischen Diagnostik, der Chirurgie, der Orthopädie und der Anatomie illustriert. Schließlich werden die Probleme der Implmentation für Routinezwecke diskutiert.
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  • 4
    ISSN: 1432-0878
    Keywords: Digital image processing ; Seminiferous epithelium ; Spermatocytes ; Spermatogenesis ; Human testis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary With the use of a digital image-processing method three-dimensional reconstructions of the arrangement of spermatocytes in human seminiferous tubules were performed. With this method it was possible to investigate the cellular distribution in the tubule in nearly any given perspective and projection. In addition, by means of simple mathematical procedures, such as by transformation of Cartesian coordinates into cylindrical coordinates, it was possible to vary the shape of a reconstruction, i.e., to convert the cylindrical image of a tubular portion into a right-angled r-ϕ-z-representation. The present work not only confirms the existence of a complex helical plan of organization of the human seminiferous epithelium but also provides further aspects of the phenomenon of physiological germ-cell loss and its integration into the kinetics of spermatogenesis.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1572-8943
    Keywords: calibration material ; calibration procedure ; DSC ; heat calibration ; heat flow rate calibration ; standards ; temperature calibration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Metrologically based measuring procedures and evaluation methods are recommended as guidance for practical temperature, heat and heat flow rate calibration of DSC instruments which are largely independent of instrumental, test and sample parameters. The relevant terms are defined, the measuring procedures and evaluation methods described, calibration materials and their characteristic data stated and guidance for the sample handling provided. Reference is made to three extended papers on calibration. The recommendations were developed by the working group ‘Calibration of Scanning Calorimeters’ of the German Society of Thermal Analysis (GEFTA).
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  • 6
    ISSN: 1572-8943
    Keywords: cold crystallization ; DSC ; heat capacity ; modulated temperature DSC ; poly(ethylene terephtalate)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The modulated temperature differential scanning calorimetric method (MT-DSC) yields three temperature dependent signals, an underlying heat capacity curve from the underlying heat flow rate (corresponding to the conventional DSC signal), and a complex heat capacity curve with a real part (storage heat capacity) and an imaginary part (loss heat capacity). These curves have been measured in the cold crystallization region for poly(ethylene terephtalate) with a modified Perkin-Elmer DSC-7. The underlying curve shows the well known large exothermic crystallization peak. The storage heat capacity shows a step change which reproduces the change in heat capacity during crystallization. This curve may be used as baseline, to separate the crystallization heat flow rate from the underlying heat flow rate curve. The loss heat capacity curve exhibits a small exothermic peak at the temperature of the step change of the storage curve. It could be caused by changes of the molecular mobility during crystallization.
    Type of Medium: Electronic Resource
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