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  • 1
    Electronic Resource
    Electronic Resource
    Autoradiographische Untersuchungen über den Eiwei\stoffwechsel des Nasenepithels vonSalamandra maculosa Laur (1964)
    Springer
    Protoplasma 58 (1964), S. 128-136 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01252622
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Quantitative Untersuchungen über die Proteinsyntheseaktivität von Epidermiszellen während der Extremitätenregeneration der Urodelen (1969)
    Springer
    Cellular and molecular life sciences 25 (1969), S. 1321-1322 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the regenerating urodele limb the epidermal cells increase their volume significantly. The nucleocytoplasmic volume ratio and the protein synthesis rate obviously change in a similar manner. But in this scheme the incorporation pattern of the cells in the wound epithelium and the apical cap differs from that of all other epidermal cells by an approximately constant rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01897526
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  • 3
    Electronic Resource
    Electronic Resource
    Der Gehalt an freien ninhydrinpositiven verbindungen im Extremitätengewebe vonAmblystoma mexicanum (1974)
    Springer
    Cellular and molecular life sciences 30 (1974), S. 245-246 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary On investigating the free amino acid pool in skin and muscles of the stylopode ofAmblystoma forelimbs, 39 ninhydrine positive substances could be detected from which 29 have been identified. High quantitative differences between skin and muscles could be shown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01934805
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  • 4
    Electronic Resource
    Electronic Resource
    Die Regeneration heteroplastischer chimärischer Extremitäten beiTriturus vulgaris undTriturus cristatus (1955)
    Springer
    Cellular and molecular life sciences 11 (1955), S. 154-155 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Au stade «bourgeon de queue» (Harrison, 27, 28), les ébauches des extrémités antérieures deTr. vulgaris et deTr. cristatus sont échangées et greffées hétéroplastiquement. Ces greffons se développent et donnent des membres dont la forme et les dimensions sont conformes à leur origine. Après section de ces pattes, chez la larve, le type donneur se manifeste au cours de la régénération, dans la vitesse de celle-ci, dans la taille et la conformation des extrémités régénérées. Par contre, les cellules de la crête ganglionnaire de l'hôte (mésectoderme) pénètrent dans le greffon et assurent à celui-ci le type de pigmentation de l'hôte, ce type étant maintenu lors d'une régénération ultérieure. L'action du système nerveux de l'hôte n'exerce aucune action morphogénétique. Il est donc manifeste que le régénérat n'est pas un massif cellulaire homogène mais qu'il provient de deux catégories d'éléments juxtaposés, les cellules de chacune d'entre elles évoluant selon ses potentialités génétiques propres; le mésectoderme, en particulier, ne donne que des formations mésectodermiques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02158479
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  • 5
    Electronic Resource
    Electronic Resource
    Modulation of embryonic NA+-K+-ATPase activity and mouse preimplantation development in vitro in media containing high concentrations of potassium (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 36 (1993), S. 320-327 
    Details
    ISSN: 1040-452X
    Keywords: Taurine ; Ouabain ; K+ ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The effect of various potassium concentrations (ranging from 1.4 mM to 30 mM K+) in modified Tyrode's medium on the culture of mouse zygotes obtained after in vitro fertilization to the blastocyst stage was examined. A clear dose-dependent negative effect of increasing K+ concentrations on the preimplantation embryonic development in vitro was found. We have previously shown that significantly more two-cell embryos reach the blastocyst stage when cultured during the second day postinsemination in medium supplemented with taurine. Because taurine, an amino acid that abounds in the reproductive tract, has been reported to inhibit the enzyme Na+-K+-adenosine triphosphatase (Na+-K+-AT-Pase), we used two other conditions known to inhibit the Na+-K+-ATPase to study their effect on mouse embryo development. Culturing embryos during a short period (the second day postinsemination) in low extracellular K+ concentrations (1.4 mM) or in medium supplemented with ouabain (50 μM) showed positive effects similar to those of culturing in medium with taurine (10 mM). This beneficial effect of ouabain was found in various K+ concentrations tested, including the high concentrations present in the oviduct. Although the effects of low K+ and taurine can possibly be ascribed to their other cellular effects, the effect of ouabain shows that inhibition of the Na+-K+-ATPase during the two-cell stage in the mouse is beneficial for further embryonic development to the blastocyst stage. © 1993 Wiley-Liss, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1080360306
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    Paper (German National Licenses)
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