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  • Articles: DFG German National Licenses  (3)
  • Analytical Chemistry and Spectroscopy  (1)
  • Complexity  (1)
  • Dendrogram  (1)
  • Endogenes Ekzem  (1)
Source
  • Articles: DFG German National Licenses  (3)
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Keywords
  • 1
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Atopie ; Endogenes Ekzem ; Hypereosinophilie ; T-Zell-Lymphom ; Zytokine ; Key words Atopy ; Atopic dermatitis ; Cytokines ; Hypereosinophilia ; T cell lymphoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A 47 year old female with a history of hay fever and a family history of atopic eczema developed localized pruritic eczematous lesions over a three year period. The lesions became generalized within just three months. Episodes of recurrent erythroderma followed and became resistant towards any therapy. Many immediate and some delayed hypersensitivity reactions were diagnosed. In the peripheral blood, leukocytosis and hypereosinophilia were observed. In addition, levels of total IgE were highly increased in serum. Immunophenotyping of the peripheral blood T cells revealed evidence for a clonal expansion of highly activated CD4+ T cells with reduced CD2 and CD5 surface expression. After a three-year course of severe disease, the diagnosis of a pleomorphic T cell lymphoma of the small-cell variant was established by histological examination and a polymerase-chain rection technique to determine the rearrangements of the γ chain of the T cell receptor. Moreover, analysis of cytokine gene expression suggested that the high IgE concentrations and eosinophil numbers observed in this patient were likely due to an increased IL-5 and IL-13 production by lymphoma T cells.
    Notes: Zusammenfassung Wir berichten über eine 47jährige Patientin mit atopischer Eigen- und Familienanamnese, die im Verlauf von 3 Jahren lokalisierte, juckende Erytheme entwickelte, welche innerhalb von nur drei Monaten generalisierten. Es kam zu rezidivierenden und schließlich therapieresistenten Erythrodermien. Neben zahlreichen Typ-I-Sensibilisierungen wurden einige Typ-IV-Sensibilisierungen nachgewiesen. Im peripheren Blut kam es zur Leukozytose und Hypereosinophilie. Ein deutlich erhöhter IgE-Spiegel war im Serum nachweisbar. Die Immunphänotypisierung der peripheren Blutlymphozyten mittels Durchflußzytometrie ergab erste Hinweise für eine klonale Expansion von stark aktivierten CD4+-T-Zellen, die eine verminderte Expression von CD2 und CD5 aufwiesen. Mittels Histologie und einer Polymerasekettenreaktionstechnik zur Untersuchung der Rearrangierung der γ-Kette des T-Zellrezeptors konnte dann nach 3jährigem Krankheitsverlauf die Diagnose eines pleomorphen kleinzelligen kutanen T-Zell-Lymphoms gestellt werden. Weitere Untersuchungen zur Zytokinexpression ließen vermuten, daß die hohen IgE-Konzentrationen im Blut und die Hypereosinophilie durch eine starke Produktion und Sezernierung von IL-5 und IL-13 in den Lymphomzellen verursacht wurden.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of classification 6 (1989), S. 177-193 
    ISSN: 1432-1343
    Keywords: Partition ; Split ; Dendrogram ; Dual graph ; Complexity ; Polynomial algorithm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Description / Table of Contents: Résumé SoientN objets à classifier et une matrice de dissimilarit és entre paires de ces objets. L'écart d'une classe est la plus petite dissimilarité entre un objet de cette classe et un objet en dehors d'elle. L'algorithme du lien simple fournit des partitions enM classes dont le plus petit écart est maximum. On étudie l'écart moyen des classes, ou, ce qui est équivalent, la somme des écarts. On propose un algorithme en Θ(N 2) pour déterminer des partitions enM classes dont la somme des écarts est maximum pourM allant deN − 1 à 2, basé sur le graphe dual du dendrogramme de la méthode du lien simple.
    Notes: Abstract ConsiderN entities to be classified, and a matrix of dissimilarities between pairs of them. The split of a cluster is the smallest dissimilarity between an entity of this cluster and an entity outside it. The single-linkage algorithm provides partitions intoM clusters for which the smallest split is maximum. We study here the average split of the clusters or, equivalently, the sum of splits. A Θ(N 2) algorithm is provided to determine maximum sum-of-splits partitions intoM clusters for allM betweenN − 1 and 2, using the dual graph of the single-linkage dendrogram.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title compound was found in extracts of several human tissues, including neurological tumors, adult brain and fetal brain. It was also present in adhesive tapes used in the laboratory to label glassware, but not in sufficient quantities to be responsible for contamination of the tissues. No source of contamination was found in the hospital. One possible source is an antioxidant preparation used in rubber manufacture. Analytical data are also given for related benzoquinones and hydroquinones.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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