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  • Articles  (11)
  • Nature Publishing Group  (10)
  • National Academy of Sciences  (1)
  • 1945-1949  (4)
  • 1935-1939  (7)
  • Natural Sciences in General  (11)
  • Biology  (11)
  • Medicine  (11)
  • 1
    Electronic Resource
    Electronic Resource
    Reversible Action of D.D.T. (1949)
    [s.l.] : Nature Publishing Group
    Nature 163 (1949), S. 286-287 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SOME unusual relationships between temperature, cuticle permeability, and metabolic activity have emerged from a study of the action of D.D.T. on resistant insects. Observations that the primary stages of D.D.T. poisoning are reversible have provided a clue to the mode of action of this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/163286a0
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  • 2
    Electronic Resource
    Electronic Resource
    Enzyme Activity as a Factor in Insect Physiology and Toxicology (1945)
    [s.l.] : Nature Publishing Group
    Nature 156 (1945), S. 194-198 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FOR many years the search for new insecticides has proceeded on the working hypothesis that toxicity is related to highly specific molecular configurations in the insecticide molecules. An excellent example of the analytical approach used by the chemist has been provided recently by Lauger, Martin, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/156194a0
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  • 3
    Electronic Resource
    Electronic Resource
    Scattering of Neutrons by Protons (1936)
    [s.l.] : Nature Publishing Group
    Nature 138 (1936), S. 1011-1011 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THEORETICAL investigations of the interaction of protons and neutrons have been given by Wigner, Heisenberg and Major ana. A very valuable check on their conclusions is provided by the study of the scattering cross-section of the hydrogen nucleus for neutrons of various energies. Cross-sections ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1381011a0
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  • 4
    Electronic Resource
    Electronic Resource
    Radioactivity of Potassium (1935)
    [s.l.] : Nature Publishing Group
    Nature 135 (1935), S. 905-905 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] KLEMPEKER1 has recently shown that postulation of the existence of a radioactive isotope, 19K40, with a large nuclear spin, affords the most likely explanation of the radioactivity of potassium. He appears, however, to have over-estimated the value of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/135905b0
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  • 5
    Electronic Resource
    Electronic Resource
    Scattering of D—D Neutrons (1939)
    [s.l.] : Nature Publishing Group
    Nature 144 (1939), S. 509-510 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Experiments hitherto performed on the scattering cross-sections of various substances for D—D neutrons have led to fundamentally different results. Most observers have found that the cross-section σ increases regularly with the atomic number, and some have deduced from their results the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/144509b0
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  • 6
    Electronic Resource
    Electronic Resource
    Nuclear Reactions due to Neutrons of 2, m.e.v. Energy (1936)
    [s.l.] : Nature Publishing Group
    Nature 138 (1936), S. 367-368 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MOST neutron workers hitherto have used Ra-Be, Ra-B or Ra-F as sources; these yield neutrons with continuous ranges of energies extending up to several m.e.v. The D—D nuclear reaction is considered to yield a homogeneous group of neutrons of about 2 m.e.v. energy. It is of interest, therefore, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/138367c0
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  • 7
    Electronic Resource
    Electronic Resource
    Transparency of Sodium and Potassium Films in the Schumann Region (1936)
    [s.l.] : Nature Publishing Group
    Nature 138 (1936), S. 124-124 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE remarkable transparency of alkali metal films reported by R. W. Wood1 is of considerable interest, on one hand in relation to the theory of electrons in metals and on the other in relation to spectroscopic technique, for these films are unique as ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/138124a0
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  • 8
    Electronic Resource
    Electronic Resource
    The Nature of Light (1936)
    [s.l.] : Nature Publishing Group
    Nature 137 (1936), S. 582-582 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR J. J. THOMSON1 has suggested that a photon is a finite, harmonic train of circular lines of electric force originating when an electron in a radiating atom falls from one energy-level to another. Such circular lines of force would move at right angles to their planes, and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/137582b0
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  • 9
    Electronic Resource
    Electronic Resource
    A Long-Term Plan for the Nile Basin (1947)
    [s.l.] : Nature Publishing Group
    Nature 160 (1947), 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] IN an article on “The Nile Basin”, vol. 7, in Nature of August 16, p. 215, Dr. C. E. P. Brooks directs attention to the fact that the theory underlying what we have called ‘century storage’ is not given in the book. This was omitted because it was thought better not to make a book dealing with ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/160611b0
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  • 10
    Electronic Resource
    Electronic Resource
    Dry Crossings of the Nile (1937)
    [s.l.] : Nature Publishing Group
    Nature 139 (1937), S. 961-962 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I HAVE read with interest Dr. Wayland's letter on the subject of a natural bridge over the Nile some eleven miles below Nimule. Unfortunately, I had not seen his note in the Uganda Journal when I wrote my review of Dr. Ludwig's book or I should have realized that “A natural bridge has grown at ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/139961b0
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