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  • 1
    Electronic Resource
    Electronic Resource
    Conflict over the age of the Universe (1995)
    [s.l.] : Nature Publishing Group
    Nature 376 (1995), S. 399-402 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The ages of the oldest stars in our Galaxy can be estimated by comparing stellar populations in globular clusters to calibrated stellar models. The best data give cluster ages of about 15.8 ± 2.1 Gyr, which conflicts with the age of the Universe estimated from measurements of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/376399a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Quark soup: do not boil (1991)
    [s.l.] : Nature Publishing Group
    Nature 354 (1991), S. 17-18 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] CALCULATIONS1-2 using a purpose-built computer show that as the Universe cooled immediately after the Big Bang, the initial plasma of unbound quarks and gluons condensed smoothly into the more familiar subnuclear aggregates that we see now. The alternative, that the transition ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/354017a0
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  • 3
    Electronic Resource
    Electronic Resource
    Galaxy formation by mock gravity (1986)
    [s.l.] : Nature Publishing Group
    Nature 321 (1986), S. 575-578 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Absorbing particles in an isotropic radiation field experience an attractive force due to their mutual shadowing. If the pre-galactic universe contained suitable sources of radiation and absorbing material, an instability caused by this effect may have led to the formation of galaxies and galaxy ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/321575a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Deuterium abundance and background radiation temperature in high-redshift primordial clouds (1994)
    [s.l.] : Nature Publishing Group
    Nature 368 (1994), S. 599-604 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Measurements of the deuterium abundance in the early Universe provide a sensitive test of the 'standard' Big Bang cosmology. The probable detection of deuterium absorption by a gas cloud between us and a distant quasar suggests an abundance much greater than estimated from observations in the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/368599a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The cosmic distance scale and the Hubble constant (1993)
    [s.l.] : Nature Publishing Group
    Nature 366 (1993), S. 309-312 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Although astronomers can reliably measure the relative distances of distant galaxies, attempts to calibrate the absolute cosmic distance scale remain controversial. Nevertheless, the sources of possible error are now clearly defined and a convincing result seems to be within ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/366309a0
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  • 6
    Electronic Resource
    Electronic Resource
    Neutron tori and the origin of r-process elements (1987)
    [s.l.] : Nature Publishing Group
    Nature 330 (1987), S. 236-238 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Suppose that an accretion disk around a compact object of mass M reaches high enough temperatures (~ 10 MeV) that infalling nuclei (particularly helium, because of its high abundance) are dissociated into protons and neutrons. (Evidence has appeared in y-ray lines that free neutrons are indeed ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/330236a0
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  • 7
    Electronic Resource
    Electronic Resource
    Gravitational interactions of cosmic strings (1984)
    [s.l.] : Nature Publishing Group
    Nature 311 (1984), S. 109-114 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Breaking a Yang–Mills symmetry at very high energy could lead to macroscopic structures in the vacuum called ‘strings’, which may be the cause of galaxy formation and clustering. Dissipative gravitational interactions of string loops can produce unusual astrophysical side effects. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/311109a0
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  • 8
    Electronic Resource
    Electronic Resource
    The history of the galaxies (1996)
    [s.l.] : Nature Publishing Group
    Nature 381 (1996), S. 489-495 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Astronomical observations now reach far enough back in time, in enough depth and detail, to reveal the history of galaxies since their formation. The early Universe contained a network of gas clouds that filled much of the space between the young galaxies, where stars were forming at a high rate. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/381489a0
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  • 9
    Electronic Resource
    Electronic Resource
    Microtubule patterns during meiosis in two higher plant species (1987)
    Springer
    Protoplasma 138 (1987), S. 126-136 
    Details
    ISSN: 1615-6102
    Keywords: Higher plant ; Immunofluorescence ; Meiosis ; Microtubule organizing centers ; Preprophase band
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A monoclonal antibody to higher plant tubulin was used to trace microtubule (MT) structures by immunofluorescence throughout mitosis and meiosis in two angiosperms,Lycopersicon esculentum andOrnithogalum virens. Root tip cells showed stage specific MT patterns typical of higher plant cells. These included parallel cortical interphase arrays oriented perpendicular to the long axis of the cell, preprophase band MTs in late interphase through prophase, barrelshaped spindles, and finally phragmoplasts. Pollen mother cell divisions exhibited randomly oriented cortical MT arrays in prophase I, pointed spindles during karyokinesis, and elongate phragmoplasts. A preprophase band was not observed in either meiotic division. MT initiation sites were seen as broad zones associated with the nuclear envelope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01281021
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  • 10
    Electronic Resource
    Electronic Resource
    The mechanism of anaphase spindle elongation (1989)
    New York, NY : Wiley-Blackwell
    BioEssays 11 (1989), S. 5-9 
    Details
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: At anaphase chromosomes move to the spindle poles (anaphase A) and the spindle poles move apart (anaphase B). In vitro studies using isolated diatom spindles demonstrate that the primary mechano-chemical event responsible for spindle elongation is the sliding apart of half-spindle microtubules. Further, these forces are generated within the zone of microtubule overlap in the spindle midzone.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bies.950110103
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