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  • 1
    Electronic Resource
    Electronic Resource
    Natural production of tritium in permeable rocks (1982)
    [s.l.] : Nature Publishing Group
    Nature 298 (1982), S. 361-363 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Precipitation after 1954 contained 3H which was produced by the thermonuclear weapon testing in the atmosphere. The 3H content of rainfall in the UK has declined from a maximum of -2,000 TU in 1963 to about 60 TU in 19751. The pre-1954 3H content (due to cosmic ray production) of precipitation on ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/298361a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Diets of early Miocene African hominoids (1977)
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 628-630 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I have analysed 65 specimens of extant pongids and hylo-batids from the Musee Royal de 1'Afrique Centrale, the American Museum of Natural History and the US National Museum of Natural History. The sample includes 10 of the 11 recognised ape species12. The early Miocene fossil apes come from the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/268628a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Cell differentiation without morphogenesis in Dictyostelium discoideum (1976)
    [s.l.] : Nature Publishing Group
    Nature 262 (1976), S. 717-719 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Bonner2 reported that a proportion of amoebae of strain NC4 developed into large vacuolated stalk-like cells when plated on agar containing 1 mM cyclic AMP at cell densities that were too low to allow aggregation in controls without cyclic AMP. This observation was extended by Chia3 who showed that ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/262717a0
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  • 4
    Electronic Resource
    Electronic Resource
    Requirement for cell differentiation in Dictyostelium discoideum (1978)
    [s.l.] : Nature Publishing Group
    Nature 271 (1978), S. 58-60 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Induction of prespore vacuoles and stalk cells by cyclic AMP in cells plated at high density under Cellophane. Q Prespore vacuoles, no cyclic AMP; D, stalk cells, no cyclic AMP; o, prespore vacuoles + cyclic AMP; o, stalk cells + cyclic AMP. HM1 cells (HM1 is an acriflavin resistant strain ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/271058a0
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  • 5
    Electronic Resource
    Electronic Resource
    A possible morphogen controlling differentiation in Dictyostelium (1983)
    [s.l.] : Nature Publishing Group
    Nature 303 (1983), S. 242-244 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The present experiments used techniques for inducing the differentiation of isolated spore cells in vitro8 and for the purification of DIF. Starved amoebae can be induced to differentiate in vitro by incubation in tissue culture dishes in a buffered salt solution containing cyclic AMP. In these ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/303242a0
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  • 6
    Electronic Resource
    Electronic Resource
    Intracellular p H and the control of cell differentiation in Dictyostelium discoideum (1983)
    [s.l.] : Nature Publishing Group
    Nature 303 (1983), S. 244-245 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To test for the presence of an inhibitor of stalk cell differentiation, aliquots of conditioned medium freed of DIF were added to amoebae of strain VI2 M2, or of its sporogenous derivative, HM18, and the amoebae incubated at densities where they produce sufficient DIF to form substantial numbers of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/303244a0
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  • 7
    Electronic Resource
    Electronic Resource
    The pressure dependence of the dielectric constant and density of acetonitrile at three temperatures (1977)
    Springer
    Journal of solution chemistry 6 (1977), S. 357-367 
    Details
    ISSN: 1572-8927
    Keywords: High pressure ; dielectric constants ; density ; acetonitrile ; temperature dependence ; Kirkwoodg factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The static dielectric constant of liquid acetonitrile is reported at 10, 25, and 40°C and at pressures up to 3 kbar. Densities of pure acetonitrile were measured where needed in order to analyze the dielectric measurements using the Kirkwood-Fröhlich equation. The Kirkwood correlation factorg K was found to be less than unity with a positive temperature but negative pressure coefficient, suggesting an increasing anticorrelation of dipoles with decreased temperature and increased pressure. Theg K factors are analyzed by a dipole pair-bonding model as outlined by Dannhauser and Flueckinger in which the lowg K values are attributed to the presence of dimers consisting of completely anticorrelated dipoles. The implication of this model on other measurements, especially MNR relaxation studies, is examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00647050
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    A possible morphogen controlling differentiation in Dictyostelium (1983)
    [s.l.] : Nature Publishing Group
    Nature 303 (1983), S. 242-244 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The present experiments used techniques for inducing the differentiation of isolated spore cells in vitro8 and for the purification of DIF. Starved amoebae can be induced to differentiate in vitro by incubation in tissue culture dishes in a buffered salt solution containing cyclic AMP. In these ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/303242a0
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Intracellular p H and the control of cell differentiation in Dictyostelium discoideum (1983)
    [s.l.] : Nature Publishing Group
    Nature 303 (1983), S. 244-245 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To test for the presence of an inhibitor of stalk cell differentiation, aliquots of conditioned medium freed of DIF were added to amoebae of strain VI2 M2, or of its sporogenous derivative, HM18, and the amoebae incubated at densities where they produce sufficient DIF to form substantial numbers of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/303244a0
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    The thermal springs of Bath (1982)
    [s.l.] : Nature Publishing Group
    Nature 298 (1982), S. 339-343 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Geochemical and hydrogeological evidence shows that the thermal springs at Bath originate from the Mendip Hills. A maximum subsurface temperature of 80±16 °C is attained during circulation to between 2.7 and 4.3 km within the Carboniferous Limestone. The residence time of the bulk of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/298339a0
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