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  • Articles  (50)
  • Other Sources
  • Springer  (36)
  • Nature Publishing Group  (14)
  • 2000-2004  (34)
  • 1955-1959  (5)
  • 1950-1954  (11)
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  • Articles  (50)
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  • 1
    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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  • 2
    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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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Use of Katharometers in Gas Chromatography (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 1322-1322 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] His equation, dt/dx = a(k &2), states that the sensitivity of the detector, dt[dx, is proportional to the difference between the thermal conductivity of the carrier gas, kl9 and the vapour, k2, and inversely proportional to the square of the thermal conductivity of the carrier gas. As Ray ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1831322a0
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  • 5
    Electronic Resource
    Electronic Resource
    Identity of ‘Nudic Acid B’ and ‘Diatretyne II’ (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 1078-1078 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A sample of the original 'nudie acid B' (10 mgm.) was used for establishing the identity. This had been stored in darkness for ten years without any special precautions against decomposition and had gone black due to surface polymerization. However, when the sample (10 mgm.) was esterified with 3 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1791078a0
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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
    Palæomagnetism of Some Dolerite Intrusions from the Theron Mountains and Whichaway Nunataks, Antarctica (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 1860-1860 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The directions of remanent magnetization have been measured by Blundell and are shown in Fig. 1. These are arranged in two groups, normal and reversed, which are 180 apart. The two groups have been combined by reversing the polarity of those with downward dips to provide a mean direction of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1841860a0
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  • 9
    Electronic Resource
    Electronic Resource
    Theory of the vacuum drying of frozen tissues (1953)
    Springer
    Bulletin of mathematical biology 15 (1953), S. 411-429 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A general theory of the drying of frozen tissue is developed and applied to the measurement of the drying rate of frozen guinea pig liver. It is shown that for a given temperature of the subliming ice crystals the mininum drying time of a piece of guinea pig liver is greater than the minimum sublimation time of a piece of ice of the same size and shape by a factor of the order of one thousand. This fact has many implications in the design of freeze-dry apparatus which will be developed in a following paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02476434
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  • 10
    Electronic Resource
    Electronic Resource
    Vitamin addition: an option for sustainable activated sludge process effluent quality (2000)
    Springer
    Journal of industrial microbiology and biotechnology 24 (2000), S. 267-274 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: vitamins; activated sludge; industrial wastewater; porous pots; Amtox™
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The process performance and metabolic rates of samples of activated sludge dosed with vitamin supplements have been compared. After initial screening, four vitamins and two metals as single supplements and in pairs, were dosed continuously into the mixed liquor of an activated sludge simulation. Toxicity, oxygen demand removal, respiration rates and suspended solids were measured to monitor the effect on process efficiency. It was confirmed experimentally that an industrial wastewater stream did not contain a sufficient supply of micronutrients for efficient biological treatment. This was concluded from the observation that control sludge batches (receiving no supplements) averaged chemical oxygen demand removal efficiency of 58%. Dosing micronutrients into the mixed liquor produced removal efficiencies of up to 69%. Some of the supplements increased the respiration rate of the sludge while some decreased it, indicating a range of stimulatory and inhibitory effects. Complex interactions between micronutrients that were dosed simultaneously were evident. Several positive effects led to the conclusion that micronutrients have the potential to optimise process performance of activated sludge plants treating industrial wastewater. The addition of phosphorus/niacin and molybdenum/lactoflavin removed wastewater components that were toxic to nitrifiers as indicated through toxicity testing, thus protecting downstream nitrification/denitrification treatment processes. Journal of Industrial Microbiology & Biotechnology (2000) 24, 267–274.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900817
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