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  • 1
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Monomeric acrylamide was given to beagles in daily oral doses of 15 mg/kg for 22 days and at 5 mg/kg for 60 days. The animals of the high dose group developed neurological signs consistent with peripheral neuropathy. Electrophysiological measurements on the saphenous nerve revealed abnormal nervous function at the end of the treatment period. Conduction velocity was affected to the greatest extent, followed by absolute refractory period and chronaxy. At 30 days upon cessation of treatment conduction velocity and chronaxy were restored to normal but absolute refractory period remained pathological. At that time the first morphological changes of peripheral nerves were detected. Administration of the 5-mg/kg dose resulted in some disability of gait, lengthening of the absolute refractory period and, in half of the animals, in discrete morphological changes. By contrast, after the oral administration of clioquinol up to 200 mg-kg per day for a one-year period there were no signs of functional nor structural alterations of the nervous system. The beagle dog is considered to be a species well suited to reveal neurotoxicity.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Lung 142 (1970), S. 231-241 
    ISSN: 1432-1750
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Aus virulenten Mycobakterien wurde durch eine neue Technik ein Peptidoglykolipid isoliert, das durch infrarotspektrophotometrische und chromatographische Analyse als D-Wachs bestimmt wurde. Es ist eine makromolekulare, komplexe Lipid-Verbindung. Ihr Peptid-Teil besteht aus DAP, Ser, Glu, Ala, Val, Ileu. Der Polysaccharid-Teil besteht aus Laktose, Glukose und Arabinose, der Lipid-Teil aus Mykolsäure, Phthionsäure, Lignocerinsäure, Tuberkulostearinsäure, Ölsäure und zwei bis jetzt nicht bestimmten Säuren mit mehr als 30 C-Atomen. D-Wachs ruft in gesunden Tieren charakteristische Gewebeveränderungen hervor, wie spezifische Epitheloidzellgranulome, Verkäsungen und Kalkablagerungen. Dagegen wurde nach Applikation der peptidfreien Stoffe: PmKo-Glycolipid, Cord-Factor-Glycolipid, C-Wachs sowie Mycol- und Phthionsäure keine spezifische Gewebereaktion festgestellt. Auf Grund des Unterschiedes in der chemischen Struktur der untersuchten Lipid-Substanzen werden folgende Schlußfolgerungen gezogen: Die toxische mycobakterielle Verbindung, die für die Entstehung der spezifischen entzündlichen Gewebsveränderungen verantwortlich ist, ist das hochmolekulare Peptidoglycolipid; der entscheidende Bestandteil seines Makromoleküls ist der Peptid-Teil.
    Notes: Abstract By a new technique a peptidoglycolipid has been isolated from virulent mycobacteria. This macromolecular complex lipid substance has been identified as wax D by infrared spectrophotometric and chromatographic analysis. The peptide portion consists of the aminoacids DAP, Ser, Glu, Ala, Val and Ileu. The constituents of the polysaccharide portion are lactose, glucose, and arabinose. The lipid portion contains mycolic acid, phthienoic acid, lignoceric acid, tuberculostearic acid, oleic acid, and two not yet identified acids with more than 30 C-atoms. In healthy animals wax D evokes characteristic tissue alterations such as specific epitheloid cell granulomatas, caseation, and calcification. On the other hand, by application of peptide-free substances as PmKo-glycolipid, cord factor-glycolipid, wax C as well as mycolic acid and phthienoic acid no such tissue reactions could be observed. On the basis of the different chemical structure of the lipid substances under investigation the following conclusions can be drawn: the high-molecular peptidoglycolipid is that toxic mycobacterial compound which is responsible for the specific inflammatory tissue reaction and its peptide portion is the determining constituent.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of virology 49 (1975), S. 13-24 
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Gross and microscopial morphological changes developing in female guinea-pigs after vaginal infection with HVH 2/Angelotti were studied. In the mucosa of the external genital tract there were inflammatory changes with formation of intra-epithelial vesicles, erosions and ulcerations. In the late stages of the infection signs of inflammatory dysplasia were also observed. The infection spread into the nervous system and produced characteristic inflammatory changes. The inflammation began as a bilateral posterior myelitis and ascended in the course of infection through the upper spinal-cord towards the brain-stem. The morphological changes were preceded by increased virus replication in the respective tissues and were correlated in time with clinical symptoms. The morphological changes seen at the site of inoculation in the external genital tract of the guinea-pig bore a certain resemblance to those seen in some cases of human infection with the same type of virus.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Functional analysis and its applications 21 (1987), S. 32-41 
    ISSN: 1573-8485
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Functional analysis and its applications 19 (1985), S. 165-173 
    ISSN: 1573-8485
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Mathematical notes 13 (1973), S. 520-525 
    ISSN: 1573-8876
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We study a number of conditions equivalent to homology to0 of vanishing cycles on a non-singular complex projective surface, and we classify such surfaces.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Mathematical notes 43 (1988), S. 219-225 
    ISSN: 1573-8876
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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