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  • Best. von Testosteron in Plasma  (1)
  • Cancer cytogenetics  (1)
  • 1
    ISSN: 1432-0584
    Keywords: Leukaemia, acute lymphoblastic ; Chromosomes ; Cancer cytogenetics ; Prognosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case of acute lymphoblastic leukaemia of null cell type in infancy showed the specific reciprocal translocation t(4; 11) (q21; q23) reported 16 times so far in the world literature. The proportions of abnormal and normal metaphases throughout the course of the illness correlated well with the clinical picture, but even during the short term remission metaphases expressing the translocation were still identifiable in appreciable numbers. Comparison between cytogenetic analyses of cultured and native bone marrow, PHA-stimulated and non-stimulated peripheral blood demonstrated the gradual conquest of the periphery by the abnormal clone. The importance of chromosomal changes and their interpretation for diagnosis, classification and prognostic judgment in haemotologic neoplasms is discussed in the light of the reported case.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 261 (1972), S. 382-385 
    ISSN: 1618-2650
    Keywords: Trennung von Steroiden ; freie u. proteingebundene ; mit Amberlite ; Best. von Testosteron in Plasma ; Proteinbindungsmethode
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Untersucht wurde, ob ein mit Amberlite IRA 400 beschichteter Kunststoffstreifen zur Trennung freier von proteingebundenen Steroiden geeignet ist und somit als Adsorbens bei der Bestimmung von Testosteron mit Proteinbindungsmethoden verwendet werden kann. Es ergab sich: 1. Tritium markiertes Testosteron, Dihydrotestosteron, Cortisol, Progesteron und Oestradiol werden in wäßrigen Medien an Amberlite adsorbiert. 2. An Amberlite werden vorwiegend die freien Steroide adsorbiert, nicht jedoch die an „spezifische“ Proteine gebundenen Hormone. 3. Bei der quantitativen Bestimmung von Testosteron ergab sich im Bereich von 1–8 ng pro Probe ein Variationskoeffizient von 1,3–3,9%. 4. Die an verschiedenen Tagen erstellten Eichkurven stimmten gut überein. Der prozentuale Fehler, errechnet aus den an 5 aufeinanderfolgenden Tagen bestimmten Werten, betrug für 8 ng 5,7%, für 2 ng 1,7%. Im Vergleich zu den bisher verwendeten Adsorbentien sind die Amberlitestreifen einfacher zu handhaben; dadurch kann gleichzeitig eine größere Anzahl von Proben bearbeitet werden.
    Notes: Abstract Amberlite IRA 400-coated resin strips were tested with regard to their capability to separate free from protein-bound steroids, and as such to act as an adsorbant for the determination of testosterone by protein binding methods. Results showed 1. Tritium labelled testosterone, dihydrotestosterone, cortisol, progesterone and estradiol are adsorbed to the Amberlite in aqueous media. 2. Adsorbed are mainly the free steroids and not the steroid hormones which are bound to their specific proteins. 3. Through the quantitative determination of testosterone, results show a coefficient of variation of 1.3–3.9% in the range from 1–8 ng per sample. 4. The standard curves performed on different days fit well. The percentage error calculated for curves performed on 5 successive days was 5.7% for 8 ng of testosterone and 1.7% for 2 ng. In contrast to other adsorbants used, the Amberlite strips are much simpler to use; therefore a greater number of samples can be processed at any one time.
    Type of Medium: Electronic Resource
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