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  • Copernicus  (26)
  • Oxford University Press  (12)
  • Nature Publishing Group  (9)
  • American Association for the Advancement of Science  (5)
  • Wiley-Blackwell  (4)
  • 1
    Electronic Resource
    Electronic Resource
    High levels of cadmium in Atlantic seabirds and sea-skaters (1977)
    [s.l.] : Nature Publishing Group
    Nature 269 (1977), S. 507-509 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Cadmium residues in individual St Kildan seabirds Species Cadmium concentration Sex (mgper kg dry wt) Liver Kidney Fulmar \*3 9.1 46.7 Fulmarus glacialis 2*c_ 50.1 184 3 3 7.7 32.8 4 V 49.4 240 Manx shearwater Puff 'in us puffinus 1U 21 £ 26.0 39.9 133 231 3 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/269507a0
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  • 2
    Electronic Resource
    Electronic Resource
    Competition and species abundance (reply) (1975)
    [s.l.] : Nature Publishing Group
    Nature 257 (1975), S. 161-161 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] HEBERT ET AL. REPLY-Since diffuse competition in Lepidoptera, as we view it, is the result of long term coevolution among lepidopterans, their food plants, predators and parasites, we would not expect these interactions to be strong in highly disturbed communities. The importance of analysing ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/257161a0
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  • 3
    Electronic Resource
    Electronic Resource
    Production of Ethanol and Succinate by Moniliformis dubius (Acanthocephala) (1967)
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 964-965 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] M. dubius was maintained in the laboratory using cockroaches, Periplaneta americana, as the intermediate hosts, and Wistar rats as the final hosts. Adult worms 42?57 days old were recovered from the rats and washed thoroughly in Tyrode saline, before being incubated in Tyrode saline containing ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/215964b0
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  • 4
    Electronic Resource
    Electronic Resource
    4-Deoxy- L -Ribose (1952)
    [s.l.] : Nature Publishing Group
    Nature 170 (1952), S. 936-936 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] 3: 4-Anhydro-a-methyl-D-lyxoside (II) was formed by treatment of 4-tosyl-a-methyl-D-lyxoside (I) with sodium methoxide. Scission of the ethylene oxide ring with hydrogen bromide in acetone was expected to yield two derivatives6, 4-bromo-a-methyl-D-lyxoside (III) and 3-bromo-p-methyl-L-xyloside ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/170936a0
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  • 5
    Electronic Resource
    Electronic Resource
    Erythropoiesis in an avian thymus (1974)
    [s.l.] : Nature Publishing Group
    Nature 249 (1974), S. 366-367 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In Quelea quelea, as in other birds1, the thymus consists of a number of lobes well separated from one another in two long chains one on each side of the neck. In embryos about to hatch each lobe was found to be small (less than 1 mm long) and white; but by the age of 10 d, 17 out of 60 individuals ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/249366a0
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  • 6
    Electronic Resource
    Electronic Resource
    Increase in Kallikrein Excretion during the Natriuresis produced by Arterial Infusion of Substance P (1974)
    [s.l.] : Nature Publishing Group
    Nature 247 (1974), S. 108-109 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It seemed from these findings that substance P at the nerve endings might be released and lead to the activation or release of kallikrein. Kallikrein has been demonstrated in a variety of tissues which produce a liquid secretion such as salivary glands9, small intestine10, pancreas11, sweat ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/247108a0
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  • 7
    Electronic Resource
    Electronic Resource
    Diffuse competition in Lepidoptera (1974)
    [s.l.] : Nature Publishing Group
    Nature 252 (1974), S. 389-391 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The relationship between intensity of competition and species abundance is not likely to be a simple one. Much depends on the limiting factors involved in the competition. The abundance of resource-limited species is, on the short run at least, related to the abundance of the resource. The data ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/252389a0
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  • 8
    Electronic Resource
    Electronic Resource
    Fluoro-fatty Acids in the Seeds of Dichapetalum toxicarium (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 611-612 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The purification of this solid fluoro-acid has now been improved. It was first separated from fluoro-oleic acid by freezing, thawing and high-speed centrifuging as already described1. The residue was dissolved in 45 ml. of acetone and any insoluble material removed by centrifuging. After ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/201611b0
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  • 9
    Electronic Resource
    Electronic Resource
    Continuous Recording of Bird Nesting Visits using Radioactive Tagging (1967)
    [s.l.] : Nature Publishing Group
    Nature 216 (1967), S. 592-593 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In this work, I used short lengths of small diameter wire, consisting of tantalum-182 sheathed in platinum. Tantalum-182 has a half-life of 115 days. The lengths are fixed to the usual aluminium bird rings with a suitable adhesive. By using rings with two strengths of radioactive label-one is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/216592a0
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  • 10
    Electronic Resource
    Electronic Resource
    The steady state response of geometrically non-linear shallow arches (1977)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 11 (1977), S. 1261-1269 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The non-linear steady state response of structures with curvature is investigated through the expository example of a shallow circular arch. A consistent mass finite element formulation is employed to derive the governing non-linear differential equations.These equations are solved by assuming a single mode expansion reducing the governing equations to the single degree-of-freedom Duffing's equation with a quadratic term. The non-symmetric amplitude-frequency curve is derived and compared with results previously obtained by direct integration of the equations of motion.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620110807
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