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  • Articles  (47)
  • Medicine  (47)
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  • Articles  (47)
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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 192 (1961), S. 1287-1288 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. EFFECTS OF ADDITION OF PARTICLES ON FATTY ACID SYNTHESIS FROM ACETATE IN LIVER AND YEAST SYSTEMS After addition of liver After addition of yeast Supernatant microsomes (ml.) particles (ml.) alone 0-025 0-05 0-10 0-30 0-025 0-05 0-10 0-30 Liver, 13-6 25-1 46-2 32-6 7-6 41-1 33-4 23-0 ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis 8 (1969), S. 277-284 
    ISSN: 0027-5107
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 11 (1930), S. 345-385 
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 27 (1971), S. 399-399 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary InSylvia borin andS. atricapilla, circannual rhythmicity was found in moult, migratory restlessness and in changes of body weight and gonad size under constant photoperiodic conditions.
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 226 (1970), S. 1029-1033 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In vitro studies using antisera to each of the two E. coli release factors, R1 and R2, show that these factors mediate release of complete proteins. Either factor can terminate R17 coat protein or R17 RNA ...
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Chromosoma 37 (1972), S. 223-231 
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Three mutants of Pisum sativum showing anomalies in the conjugation phase of meiosis, were investigated cytogenetically. Inspite of apparent normal chromosome pairing there is a strong reduction of chiasma number resulting into univalent formation. Simultaneously, chromosome aberrations appear as consequence of breakage and reunions in the prophase stage. The combined occurrence of these anomalies and their respective quantitative relationships to each other have been explained in the light of “breakage-reunion hypothesis” through the action of following factors: pairing behaviour, breakage frequency, number of breakages at one locus in the chromatid tetrads, behaviour of breakage ends and effects of environment. Due to the interaction of these factors all the anomalies found in our mutants are explainable.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 22 (1970), S. 84-84 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 21 (1970), S. 369-381 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung In der vorliegenden Arbeit wird ein Verfahren zur autoradiographischen Bestimmung des Zellzyklus der Erythroblasten in vitro angegeben. Die Knochenmarkzellen wurden bei +37°C in autologem oder homologem Plasma, das H3- bzw. C14-Thymidin enthielt, bei verschiedenen O2-Drücken inkubiert. Zur Bestimmung der DNS-Synthesezeit wurde das Doppelmarkierungsverfahren und zur Bestimmung der G2-Phase das „%-markierte-Mitosen-Verfahren” angewandt. Vergleichende in vivo- und in vitro-Messungen zeigten, daß bei 2,2 atü reinen O2 bei der hier angewandten in vitro-Methode das Wachstumsverhalten der Erythroblasten beim Tier und offenbar auch beim Menschen den in vivo gefundenen Werten entspricht.
    Notes: Summary This paper describes an in-vitro-method for the autoradiographical determination of the cell cycle of erythroblasts (rat, mouse, and man). The bone marrow cells were incubated (37° C) for two hours in autologous or homologous plasma containing H3- and C14-thymidine respectively. For determination of DNA synthesis time the double labeling technique, for estimation of the premitotic G2-phase the method of labeled mitoses was applied. The comparison of in vivo and in vitro measurements shows that using 2,2 atm of pure oxygen by the described in-vitro-method the cell proliferation kinetics of erythroblasts of rat, mouse, and man were approximately the same as in vivo.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 4 (1964), S. 238-251 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung 1. Es wird die Verteilung des den Pentosephosphat-Cyclus einleitenden Fermentes Glukose-6-phosphat-Dehydrogenase in den verschiedenen Strukturen gesunder Organe beschrieben und nach Organsystemen gegliedert in Tabellenform wiedergegeben. 2. Die stärkste Enzymaktivität ist im Epithelgewebe, in den Drüsen mit innerer Sekretion und in Gliazellen des Nervensystems festzustellen. 3. Die Bedeutung des Pentosephosphat-Cyclus für die Bereitstellung von Ribose und TPNH-abhängiger Synthesen wird am Beispiel des enzymaktiven Epithelgewebes und der ebenfalls fermentaktiven Drüsen mit innerer Sekretion besprochen.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 28 (1975), S. 217-220 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Eine Familie mit 2 autoptisch gesicherten Neuroblastomen, einem Ganglioneuroblastom und Hinweisen auf 3 weitere Neuroblastome wurde cytogenetisch untersucht. Anlaß war der von Sandberg et al. (1972) mitgeteilte Befund von double-minute-Chromosomen in Lymphocyten des peripheren Blutes bei einem Neuroblastom. Die Untersuchung sollte klären, ob in dieser “Neuroblastom-Familie” eine chromosomale Aberration als erbliche Vorschädigung die Entstehung von Sympathicustumoren begüngstigt. Es fanden sich keine konstanten Chromosomenanomalien, auch keine double-minute-Chromosomen.
    Notes: Summary A cytogenetic investigation was performed in a family which included 2 individuals with congential neuroblastomas of the suprarenal gland confirmed by autopsy and one with a ganglioneuroblastoma of the thoracic wall as well as 3 other individuals with tumors which probably were also neuroblastomas. The lymphocytes of the peripheral blood of 5 healthy relatives as well as of the child with the treated ganglioneuroblastoma failed to show a constant alteration of chromosomes. In this family, therefore, the suggestion could not be proofed that the very rate familial aggregation of neuroblastomas is caused by a hereditary chromosomal aberration.
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