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  • Articles: DFG German National Licenses  (7)
  • 2005-2009  (1)
  • 1920-1924  (6)
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  • Articles: DFG German National Licenses  (7)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Dissolved organic carbon and decreasing pH mobilize cadmium and copper in soil (2005)
    Oxford, UK; Malden, USA : Blackwell Science Ltd
    European journal of soil science 56 (2005), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: When limed farmland is converted to forestry cadmium (Cd), copper (Cu) and other heavy metals can become mobile because of acidification and increased concentration of dissolved humic substances. The influence of pH and dissolved organic C on amounts and rates of Cd and Cu release was investigated in a cultivated soil by extraction with ∼ 1 mm hydrochloric acid at pH 3 with and without dissolved organic C in the batch mode with weekly replacement of the extraction solution. After 88 weeks, 35–50% of aqua regia-extractable Cd was extracted; addition of 10 mm dissolved organic C had no effect on the amount dissolved, but it increased the initial rate of release because the organic matter buffered the suspension at a lower pH. The solubility and release rate of Cd decreased as the geochemically active fraction was depleted. This suggests that Cd occurs in the soil in a continuum of binding strengths ranging from readily available to strongly bound forms. The repeated extractions resulted in distribution coefficients (Kd dis) that have log-linear relationships with pH. This allows prediction of Cd solubility during acidification of soil. Dissolved organic C enhanced the release of Cu from less than 8% (without) to more than 20% (with) of aqua regia-extractable Cu. Total contents of Cd and Cu cannot be used as measures of the metals' availability during acidification of former limed farmland. Predictions of availability should be based on the solubility as a function of pH and the degree of Cd or Cu depletion from the geochemically active fraction in soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2389.2004.00661.x
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The Optical Spectrum of Hafnium (1923)
    [s.l.] : Nature Publishing Group
    Nature 112 (1923), S. 900-901 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN a letter to NATURE of October 27, p. 618, in which we gave a complete list of the lines belonging to the hafnium spectrum between 2500 and 3500 Å.U., we announced a detailed examination of the remaining part of the spectrum which can be obtained photographically. The result of this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/112900b0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The Optical Spectrum of Hafnium (1923)
    [s.l.] : Nature Publishing Group
    Nature 111 (1923), S. 322-322 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DURING the progress of the work of Coster and Hevesy on the concentration and isolation of the new element hafnium (atomic number 72), the discovery of which was announced in NATURE of January 20, p. 79, we have examined spectroscopically a large number of their preparations in order to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/111322a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    On Urbain's Celtium Lines (1923)
    [s.l.] : Nature Publishing Group
    Nature 111 (1923), S. 461-461 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN a previous letter (NATURE, March 10, p. 322) we have shown that the optical spectrum of the new element hafnium, of atomic number 72, which was discovered a short time ago by Coster and Hevesy, does not contain any of the lines belonging to the characteristic spectrum ascribed by Urbain ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/111461a0
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The Optical Spectrum of Hafnium (1923)
    [s.l.] : Nature Publishing Group
    Nature 112 (1923), S. 618-619 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN our letter to NATURE of March 10, 1923, we gave a preliminary list of the most prominent lines between 2500 and 3500 Å. U. in the arc spectrum of the new element hafnium, discovered by Coster and Hevesy (see NATURE, January 20, February 24, April 7, 1923). In this list we included only lines ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/112618b0
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Das optische Spektrum des Hafniums (1924)
    Springer
    Naturwissenschaften 12 (1924), S. 528-530 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01505624
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Über die Auffindung des Hafniums und den gegenwärtigen Stand unserer Kenntnisse von diesem Element (1923)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 63 (1923), S. 193-196 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01470492
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    Paper (German National Licenses)
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