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  • 11
    Electronic Resource
    Electronic Resource
    Declining Phanerozoic background extinction rates: effect of taxonomic structure? (1985)
    [s.l.] : Nature Publishing Group
    Nature 313 (1985), S. 216-218 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A new compilation of the stratigraphic ranges of fossil groups has permitted detailed analyses of total1 and per-family2 extinction rates of Phanerozoic families of marine metazoans, which show a statistically significant decline in familial extinction during most of the Phanerozoic. Speculation ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/313216a0
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  • 12
    Electronic Resource
    Electronic Resource
    The tropics as a source of evolutionary novelty through geological time (1993)
    [s.l.] : Nature Publishing Group
    Nature 364 (1993), S. 142-144 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Forty-two orders of benthic marine invertebrates have appeared since the beginning of the Mesozoic20 22, and the age, environment, and location of the oldest known members are documented20. These data are difficult to evaluate, however, because palaeontological sampling is severely biased ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/364142a0
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  • 13
    Electronic Resource
    Electronic Resource
    Muzzle length and heat loss (1993)
    [s.l.] : Nature Publishing Group
    Nature 366 (1993), S. 216-217 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - In his interesting News and Views article on the evolution of hominid bi-pedalism, Wood1 revives Wheeler's2 speculation that elongation of the muzzles of baboons is a thermoregulatory adaptation. According to this suggestion, long muzzles evolved in baboons to provide an ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/366216a0
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  • 14
    Electronic Resource
    Electronic Resource
    Polarised Photoluminescence of Adsorbed Molecules of Dyes (1934)
    [s.l.] : Nature Publishing Group
    Nature 133 (1934), S. 140-140 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I HAVE investigated the degree of polarisation of fluorescence and phosphorescence from ‘Cellophane’ films coloured by Kautsky's method1 (‘Cellophane’ phosphors). The molecules of the dye, adsorbed on the surface of the microcrystals of the film, cannot rotate ; therefore the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/133140a0
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  • 15
    Electronic Resource
    Electronic Resource
    Efficiency of Anti-Stokes Fluorescence in Dyes (1933)
    [s.l.] : Nature Publishing Group
    Nature 131 (1933), S. 839-840 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ACCORDING to Kautsky and his collaborators1, the majority of the molecules of dyes investigated by them, among which were also the molecules of fluoresceine, show an ability to phosphoresce when ‘energetically isolated’, for example, when adsorbed by convenient adsorbents. We can ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/131839b0
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  • 16
    Electronic Resource
    Electronic Resource
    Temperature Influence on the Pressure Broadening of Spectral Lines (1938)
    [s.l.] : Nature Publishing Group
    Nature 142 (1938), S. 1122-1122 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE classical theories of pressure broadening of spectral lines given by Lorentz1 and by Weisskopf2 lead to the following intensity distribution in an absorption line: subject to the condition ωγ/2. Here γ/2 is the number of collisions per second of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1421122a0
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