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  • Articles  (15)
  • Nature Publishing Group  (14)
  • American Association for the Advancement of Science (AAAS)  (1)
  • 1975-1979  (2)
  • 1960-1964  (7)
  • 1940-1944  (5)
  • 1925-1929  (1)
  • Biology  (15)
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  • Articles  (15)
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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 150 (1942), S. 349-349 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR. BOWDEN and his collaborators1 in their investigations on the mechanism of metallic friction need have little doubt that, under many of the conditions of load and speed used in practice, the local temperatures reach a high value. Very high local temperatures are attained in ...
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 152 (1943), S. 292-296 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE of the chief difficulties in the interpretation of the analogies between the biological activity of a drug and its behaviour in synthetic systems arises from the ambiguity of toxicological data, which may generally be correlated with solubility in the cell lipoids (Overton-Meyer), adsorption at ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 459-461 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] VARIOUS physical and chemical quantities have been associated with, or suggested for, whole or partial explanation of the biological function of chemical carcinogens. Such quantities are organic fluorescence1-3, for hydrocarbons non-radiative energy transfer of electronic excitation energy by ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 699-699 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In particular, one band at 31,301 cm?1 shows the simple two-branch structure expected for a 0+ ? 0+ transition. The band is so strongly degraded to longer wave-lengths that the rotational analysis is unambiguous in the range J ? 20?45. The vibrational analyses agree in assigning v" ? 0 to this ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 603-604 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We wish to report an extremely simple and rapid method, using the apparatus shown in Fig. 1, which is suitable for the detection of volatile compounds including such common ones as ether, halothane, chloroform, carbon tetrachloride, ethanol, acetone, trichloroethylene and paraldehyde. It consists ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 66-67 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The notion of long-duration collisions suggests immediately that the observations by Bradbury and Tatel* of electron capture in pure water vapour can be interpreted in terms of the formation of electron traps, that is, successive collisions of quasi-traps with water molecules to form (H2O)n-% ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 336-336 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Four series of passages, at 5-7 day intervals, with the T'ang strain of trachoma, were all successful. Definite symptoms of disease first developed after 3 4 passages, and are evident 3-4 days after infection. The fur becomes ruffled and the animals adopt a hunched posture and a stilted, trembling ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 145 (1940), S. 462-463 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ONE of the major problems in research on insecticidal action concerns the correlation of the toxicity of an insecticide with its chemical and physical properties. Very little progress has hitherto been made when relatively non-toxic carriers have been used. This is mainly due to the fact that ...
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 152 (1943), S. 400-404 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE need for standardized methods of testing insecticides has become an important factor in insecticidal research, especially where routine examination of new materials is desirable. Chemical assay may provide an index of the potential toxicity of an insecticide, but evidence has been provided ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 696-697 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The indication that the first step in the biological degradation of humic acid3,4 was a reductive step led us to re-investigate chemical reductive methods. Sodium amalgam which had been used previously in the reduction of humic acid5 was found most successful. The humic acid was dissolved in sodium ...
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