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  • 1
    Electronic Resource
    Electronic Resource
    Scientific Inexactitude. (1930)
    [s.l.] : Nature Publishing Group
    Nature 126 (1930), S. 847-847 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN NATURE of Nov. 8, p. 725, Mr. Darling criticises a certain sentence in a recent book on “Sound”. The sentence in question, “A clamped steel bar electrically maintained is sometimes employed as a rough standard of frequency”, is described as ‘unfortunate’ and ‘incorrect’, and is given as an ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/126847c0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fertility of roach × bream hybrids, Rutilus rutilus (L.) ×Abramis brama (L.), and their identification (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 30 (1987), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Adult roach, bream and their presumed F1 hybrid from an Anglian Water reservoir were identified on the basis of morphological and meristic characteristics. The hybrid was clearly intermediate. Four hybrid breeding crosses were induced to spawn by hypophysis. A bream × roach cross (female named first) failed to produce fertile eggs, whereas F1 hybrid × roach, roach × F1 hybrid and F1 hybrid × F1 hybrid all produced fry. Fertility (defined as survival of eggs to hatching) was high for the F1 hybrid × roach back-cross (56%) but low for the others (〈2%), in comparison to the pure species controls (roach 69%, bream 76%). Progeny from these crosses were reared until anal fin rays could be counted. These counts indicated intermediacy between the parents and back-crossed individuals, and similarity between F1 hybrids and their F2 progeny.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1987.tb05750.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Rubratoxin B , a Proposed Structure for a Bis -anhydride from Penicillium rubrum Stoll (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 767-770 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] N.m.r., infrared, mass spectra and chemical methods have provided a unique structure for rubratoxin ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/220767a0
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    Paper (German National Licenses)
    Fulltext
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