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  • Articles  (189)
  • 2010-2014  (121)
  • 2000-2004  (39)
  • 1950-1954  (21)
  • 1940-1944  (8)
  • Natural Sciences in General  (102)
  • Energy, Environment Protection, Nuclear Power Engineering  (87)
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  • Articles  (189)
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  • 1
    Electronic Resource
    Electronic Resource
    Assessment of Microbial Populations in Activated Sludge Using an Organism Diversity Index (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 16 (2002), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: An organism diversity index for use with mixed liquor or wastewater samples was developed to assess the species richness and diversity of activated sludge. The index was used in several studies and was found to be fast and simple to perform using basic laboratory equipment. Two bench-scale and two pilot-scale studies found that the resulting ‘organism diversity index’value was a good indicator of process performance and was not influenced by the total concentration of the mixed-liquor suspended solids but by their nature alone. The technique rapidly yielded pertinent information about the health of the sludge and could be used instead of genetic investigations to obtain population information quickly enough for wastewater-treatment plant process control.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.2002.tb00366.x
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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
    Marine Biological Research in Great Britain (1944)
    [s.l.] : Nature Publishing Group
    Nature 154 (1944), S. 300-300 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE letter published in Nature of July 29 from Prof. F. E. Fritsch opens an important subject which has been in the minds of a number of zoologists during the past few years, and it is one in connexion with which some of us would be extremely glad to see action taken on the lines which Prof. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/154300a0
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  • 4
    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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  • 5
    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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  • 6
    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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  • 7
    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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  • 8
    Electronic Resource
    Electronic Resource
    Resistance of a Soil Nematode to Changes in Osmotic Pressure (1942)
    [s.l.] : Nature Publishing Group
    Nature 149 (1942), S. 500-500 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE results detailed below are considered to be of sufficient interest to merit early publication. An amplified account will be published in the future, when a description will be given of the species of Rhabditis which was employed. The worms were cultured in an agar broth the osmotic pressure ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/149500a0
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  • 9
    Electronic Resource
    Electronic Resource
    Oscillator Strength of the Na 2 1 Σ— 1 Σ Transitions (1950)
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 191-192 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/166191b0
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  • 10
    Electronic Resource
    Electronic Resource
    Masses of Fundamental Particles (1950)
    [s.l.] : Nature Publishing Group
    Nature 165 (1950), S. 1018-1018 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Substituting for M% the present value 1837 '56 m for the mass of the neutral hydrogen atom, it is found that MX is 1839-08 m, in excellent agreement with the experimental neutron mass 1839-05 m. This simple relation between the neutron and hydrogen atom is consistent with Eddington's1 concept of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1651018c0
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