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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Mineralium deposita 16 (1981), S. 459-465 
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 135 (1981), S. 245-253 
    ISSN: 1432-1076
    Keywords: Transient hypothyroidism ; Prophylactic thyroid hormone substitution ; Neonatal intensive care ; Preterm infants ; Respiratory distress syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Our previous examinations had shown that 9 of 13 premature infants with severe respiratory distress had hypothyroid T4-values. On the basis of these results a prospective study was initiated. Every second neonate born after less than 37 weeks gestation or weighing less than 2200 g and admitted to our intensive care unit since Janary 1979 received a prophylactic dose of 25 μg l-Thyroxine and 5 μg Tri-iodothyronine daily. Five of the patients inadvertently did not receive the drug and were included in the non-treated group which thus numbered 55. Both groups were nearly identical with regard to gestational age, birth weight and Apgar score. In the treated group of 45 infants three (=6.6%) died. In the untreated group of 55 infants 16 (=29%) died. The probability that the different mortality in the two groups was due to chance alone is less than 0.5% (χ2-test: P〈0.005). In 14 of the 55 non-treated patients transient hypothyroidism developed. Five patients with transient hypothyroidism and 2 patients with low T4-values without a TSH-increase were treated with thyroid hormone after ascertainment of their serum thyroxine levels and six survived. The analysis of the prophylactically treated cases showed that the dosage of 25 μg l-Thyroxine and 5 μg Tri-iodothyronine in critically ill infants (i.e., those who were mechanically ventilated or had sepsis) was rarely sufficient to produce normal serum thyroxine levels. In these children thyroxine usually rose to normal levels only when they had passed the acute stage of the disease. It therefore seems advisable to double the dose of thyroid hormone during the acute stage of the disease.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung zu Teil III Auf Grund der beobachteten Polarisationswirkungen (Verschiebung derpKWerte, der Keto-Enol- und der Nitro-Azinitro-Gleichgewichte) an Hochmolekularen mit definierten Einschlußbezirken vom Cyclodextrin-, Harnstoff- und Peptid-Typus, wird die sterische Spezifität von Fermentmodellen und Adsorbentien mit der Fähigkeit zur Bildung von Ketten-, Ring-, Netz- und Schichtsowie Assoziat-Einschlußsystembildnern geprüft an der Racematspaltung von DL-Aminosäuren und ihren Derivaten mit einschlußbegünstigenden Atomgruppen (z. B. TCA-Aminosäuren). Die aromatischen und heterozyklischen Seitenketten von Aminosäuren stellen einschlußbegünstigende Atomgruppen dar. Aus der Tatsache, daß in der Regel die unnatürliche D-Form stärker gebunden wird als der natürliche Antipode, ergibt sich die Notwendigkeit, die sterische Spezifität der Enzyme durch eine Kooperation von Substrat und Enzymhelix über ihre Seitenketten gemaß Abb. 22 zu klären. Für die zur Funktion von Redoxasen anzunehmende Elektronenleitung über die Peptidkette war der Nachweis von O2-Einsehlußsystemen erforderlich. Das Problem wurde durch Verwendung von14CO und14C-Acetylen in Angriff genommen, von den genannten physiologisch aktiven Gasen liefert das Acetylen Gaseinschlußsysteme, CO wirkt als Komplexbildner mit Schwermetallen. Der Nachweis von Gaseinschlußsystemen führte zur Aufstellung eines Funktionsschemas für Redoxasen, Welches ein Zusammenspiel von Redox- und Einschlußgleichgewichten vorsieht.
    Type of Medium: Electronic Resource
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