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  • Articles  (54)
  • Cambridge University Press  (23)
  • Nature Publishing Group  (22)
  • American Association for the Advancement of Science  (9)
  • American Society of Hematology
  • Geological Society of America (GSA)
  • 2000-2004  (5)
  • 1985-1989  (26)
  • 1960-1964  (12)
  • 1950-1954  (11)
  • Chemistry and Pharmacology  (31)
  • Geography  (23)
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  • Articles  (54)
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Year
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  • 1
    Electronic Resource
    Electronic Resource
    Operation of the Backward-Wave Oscillator (1960)
    [s.l.] : Nature Publishing Group
    Nature 188 (1960), S. 803-804 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The travelling-wave-tube analogue was described in detail in a recent paper1, and is based on the lumped circuit travelling-wave tube first described by Matthews2. Briefly it consists of a series of drift tubes inside a vacuum envelope interconnected with a series of inductance coils which are ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/188803b0
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  • 2
    Electronic Resource
    Electronic Resource
    Life-time of the Lithium Atomic Resonance States (1951)
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 156-156 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Ladenburg absorption formula3 relating the integral of the absorption coefficient over the whole line to the Einstein transition probability coefficient Anm may be conveniently put in the form loge(I0/IV)dl(1)pNƒe2ll02/mc2 (1) where N is the number of normal atoms of absorbing vapour per ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/167156a0
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  • 3
    Electronic Resource
    Electronic Resource
    Possible Role of Proteolytic Enzymes in Protein Synthesis (1953)
    [s.l.] : Nature Publishing Group
    Nature 171 (1953), S. 1024-1025 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As a test of this hypothesis, Hendler and Green-berg5 have recently studied the metabolism of labelled y-glutamyl-glycine; but they found that this particular compound is not significantly involved in any of several living systems that incorporate amino-acids into proteins. The evidence presented ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1711024a0
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  • 4
    Electronic Resource
    Electronic Resource
    Experimental Determination of the Life-times of Atomic Resonance States (1951)
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 112-112 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Further work is progressing with the view of adapting the method to molecular transitions, and the results will be reported at a later date. Atom Transition Wave-length Life-time (sec.) Na 32S-32P 5896, 5890 A. 1.61 0.06 x 10-8 K 42S-42P 7699, 7665 2.71 0.09 x 10-8 Rb 52S-52P 7947, 7800 2.81 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/167112a0
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  • 5
    Electronic Resource
    Electronic Resource
    A Modified Source Theory of Electromagnetic Propagation (1964)
    [s.l.] : Nature Publishing Group
    Nature 202 (1964), S. 375-376 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I HAVE previously1 directed attention to the fact that many relativistic electromagnetic effects can be explained using classical theory. This approach avoids time transformations, which are the most controversial consequence of special relativity. I should like to re-state these arguments more ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/202375a0
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  • 6
    Electronic Resource
    Electronic Resource
    Elementary Particles and the Signature of the Space-time Metric (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 589-590 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In relativistic quantum field theory where the under lying space-time metric is of the type given by (1), and in the unquantized field theory of gravitation as described by the general theory of relativity where the metric is that of a Riemann space of four dimensions, the signatures of the metrics ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/201589b0
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  • 7
    Electronic Resource
    Electronic Resource
    Cosmological Red-shift (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 1180-1180 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] From this metric Hawkins2 has deduced an expression for a red-shift, arising in the absence of any galactic displacement, given by: AX 4 - - I recently proposed3 that a red- shift will occur in any model universe containing uniformly distributed matter if absorption or shielding of gravitational ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2041180a0
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  • 8
    Electronic Resource
    Electronic Resource
    Specific Gravity Changes during the Development of the Sheep Fœtus (1962)
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 788-789 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Changes in the specific gravity of the whole foetus with increase in festal age. J, Ram foetuses; $, ewe foetuses; --. least squares regression of specific gravity on age Fœtuses were obtained from fine-wooled, Australian Merino ewes mated to a ram of the same strain, and foetal ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/196788a0
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  • 9
    Electronic Resource
    Electronic Resource
    Presence and Absence of the Pre-Natal Check in Lambs' Birthcoats (1954)
    [s.l.] : Nature Publishing Group
    Nature 173 (1954), S. 878-879 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sickle-fibres constitute the most easily perceived evidence of the pre-natal check3-5. Of ten N/ + Aggrade lambs studied in a number of body regions, all had sickle-fibres on the shoulder patch and shoulder, and they were present on several necks, withers, sides and o backs, but not on any ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/173878b0
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  • 10
    Electronic Resource
    Electronic Resource
    Caution in the Use of Liquid Propane for freezing Biological Specimens (1954)
    [s.l.] : Nature Publishing Group
    Nature 174 (1954), S. 235-235 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] On one occasion when I was slowly condensing propane in a flask chilled with liquid nitrogen, I obtained what appeared to be such a mixture : that is, I obtained two distinct layers of liquid in the flask, one of which had the characteristic appearance of liquid oxygen. This experience suggested ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/174235b0
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