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  • 1985-1989  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Gold uptake by perennial ryegrass: The influence of humates on the cycling of gold in soils (1989)
    Springer
    Biogeochemistry 7 (1989), S. 3-10 
    Details
    ISSN: 1573-515X
    Keywords: gold ; humates ; humic acid ; cycling in soils ; plant uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract An experiment in which perennial ryegrass (Lolium perenne L.) was grown in solution cultures containing various forms of radioactive gold (198Au) is described. Uptake of labelled Au from solutions containing either Au chloride or various Au-humic acid (HA) complexes is compared. In each case concentrations of Au in the plant roots were several fold higher than in the plant shoots. However, the Au concentration in roots from some of the Au-HA preparations was only about 5% of that from the Au-HA solutions. High voltage electrophoresis studies indicate the presence of several Au-HA complexes in the solution cultures. The relevance of these findings to the cycling of Au within soils is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00000894
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The influence of humic and fulvic acids on silver uptake by perennial ryegrass, and its relevance to the cycling of silver in soils (1986)
    Springer
    Plant and soil 95 (1986), S. 3-8 
    Details
    ISSN: 1573-5036
    Keywords: Fulvic acids ; Humic acids ; Lolium perenne L. ; Silver
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary An experiment in which perennial ryegrass (Lolium perenne L.) was grown in solution cultures containing various forms of radiosilver (110mAg) is ptake of labelled Ag from solutions containing either AgNO3, Ag2SO4, AgCH3COO, Ag-humic acid (HA) or Ag-fulvic acid (FA) complexes is compared. In each case concentrations of Ag in the plant roots was several fold higher than in the plant shoots. However the Ag concentration in roots from the Ag-HA preparations was only about 5% of that from the AgNO3 solutions; from Ag-FA it was 18%. Transport index values were highest for plants grown in the Ag-HA solution, indicating greater mobility of Ag within these plants. Preliminary data for a selective extraction procedure performed on Ag-HA preparations suggest sorption onto various active sites. The relevance of these findings to the cycling of Ag within soils is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02378846
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Silver and other metals in some aquatic bryophytes from streams in the lead mining district of Mid-Wales, Great Britain (1985)
    Springer
    Water, air & soil pollution 24 (1985), S. 329-338 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A reconnaissance survey was made of trace metals in surface waters and three aquatic bryophytes (Scapania undulata,Hygrohypnum luridum andPolytrichum commune) in the mid-Wales Ag-Pb mining district. This area is contaminated by heavy metals from past mining. Elevated levels of Ag, Cd, Cu, Pb, and Zn were found in water and plant tissue. All the plants accumulated Ag and the other metals butScapania appears the most suitable as a plant monitor of Ag-polluted waters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00161792
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Honey as an indicator of heavy metal contamination (1987)
    Springer
    Water, air & soil pollution 33 (1987), S. 179-189 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The potential use of honey as an indicator in mineral prospecting and environmental contamination studies has been investigated. Silver, Cd, Cu, and Pb levels are reported in honeys collected throughout the U.K. The elemental content of honeys was investigated in relation to that in the soils collected from within the foraging area. For samples collected over two seasons the following concentrations were found Ag 〈0.1 to 6.5 ng g−1 (d.w.); Cd 〈0.3 to 300 ng g−1; Cu 35 to 6510 ng g−1; Pb 〈2 to 200 ng g−1. Considerable spatial and seasonal fluctuations were apparent. No correlations were observed between honey and soil concentrations for either Cu or Pb. It is concluded that the low concentrations of heavy metals in honey and their inherent variability (due to differences in floral source, foraging range, entrapment of atmospheric particulates on the flower, etc.) detract from the reliable use of honey as a monitoring tool. The relative merits of honeybees, pollen and beeswax for environmental monitoring or biogeochemical prospecting studies are also briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191386
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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