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  • 13C-NMR spectroscopy  (1)
  • Borreliosis  (1)
  • Doppler sonography  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inorganic and organometallic polymers and materials 4 (1994), S. 315-323 
    ISSN: 1572-8870
    Keywords: Microcrystalline cellulose ; potassium ; ethylenediamine ; hexamethylphosphoric triamide ; crystalline modification ; FTIR spectroscopy ; 13C-NMR spectroscopy ; scanning electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Potassium derivatives of cellulose were prepared by treating of microcrystalline cellulose (MCC) with complexes of potassium (K) with ethylenediamine (EDA) and K with hexamethylphosphoric triamide (HMPT). The reaction products were characterized by X-ray diffraction,13C-NMR and FTIR spectroscopy, SEM, and EDXA.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1459
    Keywords: Key words Emotions ; Evoked ; cerebral blood flow ; Transcranial ; Doppler sonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The cerebral representation of emotions has previously been investigated by the study of patients with local brain damage, experiments with selective stimulation of only one hemisphere, and more recently by imaging techniques such as positron-emission tomography or magnetic resonance imaging measuring local cerebral blood flow. We investigated the mean flow velocity (FVmean) in the middle cerebral artery (MCA) by transcranial Doppler sonography during emotional stimulation with video scenes in 24 healthy test persons. The videos consisted of an erotic scene and a violent scene shown in contrast to a calming scene. Blood pressure, heart rate, and breathing frequency were monitored continuously by noninvasive measurement. FVmean increased during the erotic scene to 108.5 ± 11.9% (P 〈 0.05) of the baseline value in the right MCA and to 109.0 ± 10.6% (n.s.) in the left MCA. During the violent scene FVmean reached 109.0 ± 8.7% (P 〈 0.05) on the right side and 108.1 ± 13.0% (n.s.) on the left side. The FVmean time course showed a close relationship to the video sequence. During scenes involving great tension FVmean showed a plateaulike state and peaked during sudden actions. Blood pressure, heart rate, and respiratory rate showed no significant changes. However, we observed a tendency towards lower heart rates (lowest value 94.5 ± 13.6%) during the erotic scene and two peaks (103.2 ± 13.3%, 104.8 ± 16.8%) coinciding with sudden violent actions. The significant increase in FVmean in the right MCA supports the theory of a right hemisphere dominance for the processing of emotions.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Epidemiologie ; Borreliose ; Antikörper ; Key words Epidemiology ; Borreliosis ; Antibodies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Neuroborreliosis is a very frequent subtype of infection with Borrelia burgdorferi. Because of the widely spread inapparent infections finding of diagnosis by analysis of serum antibodies is very difficult. In the years 1990–1994 the serum of 6.775 patients of the Department of Neurology in Homburg, Germany was analysed with regard to Borrelia burgdorferi specific IgG antibodies. 24% showed a positive serum titer and 20% a borderline result. 73 patients showed a specific intrathecal IgG antibody synthesis. In contrast to patients with antibodies in serum these patients showed a significant cumulation during summer. The high percentage of positive serum titers and the season independence support the assumption of widely spread inapparent infections. If a patient shows neurological symptoms the finding of serum antibodies against Borrelia burgdorferi is not sufficient for the diagnosis of Neuroborreliosis. A specific intrathecal synthesis of antibodies, is the most reliable serological indicator for Neuroborreliosis. Intrathecal synthesis usually starts three to four weeks after the first clinical symptoms.
    Notes: Zusammenfassung Die Neuroborreliose ist die zweithäufigste Manifestationsform einer Infektion mit Borrelia burgdorferi. Die serologische Diagnostik durch Bestimmung von IgG-Antikörpern wird durch einen hohen Prozentsatz an stummer Durchseuchung in der Bevölkerung erschwert. Von 1990 bis 1994 wurden in der Neurologischen Universitätsklinik Homburg 6775 Patienten serologisch auf Borrelia-burgdorferi-spezifische IgG-Antikörper untersucht. In 24% der Fälle wurde ein positiver Serumtiter und in 20% ein grenzwertiger Titer festgestellt. Der Nachweis einer spezifischen intrathekalen IgG-Antikörperproduktion konnte bei 73 Patienten geführt werden. Während bei der Aufschlüsselung der Daten aus den Serum-IgG-Untersuchungen auf die einzelnen Monate keine relevanten jahreszeitlichen Schwankungen sichtbar waren, zeigte sich bei dem Anteil der IAI-positiven Fälle eine signifikante Häufung in den Sommermonaten. Der hohe Prozentsatz von Patienten mit positiven Serumtitern gegen Borrelia burgdorferi sowie die fehlende jahreszeitliche Schwankung deuten auf eine stumme Duchseuchung hin. Eine Seropositivität genügt beim Vorliegen einer neurologischen Symptomatik nicht zum Nachweis einer Neuroborreliose. Vielmehr ist der Nachweis einer spezifischen intrathekalen Antikörpersynthese der zuverlässigste serologische Hinweis auf eine Neuroborreliose. Das Einsetzen dieser intrathekalen Synthese erfolgt in der Regel jedoch erst in der 3.–4. Woche nach Beginn der Symptomatik.
    Type of Medium: Electronic Resource
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