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  • Articles  (3)
  • Cadmium  (2)
  • Flexirubin-type pigments  (1)
  • Coarctatio aortae
  • General Chemistry
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  • Inorganic Chemistry
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  • 1985-1989
  • 1980-1984  (3)
  • 1965-1969
  • Biology  (3)
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  • Articles  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 126 (1980), S. 291-293 
    ISSN: 1432-072X
    Keywords: Flexirubin-type pigments ; Flavobacterium ; Taxonomy of flavobacteria ; Chemosystematic markers ; Flexibacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In an organism (strain C 1/2 from Dr. P. R. Hayes, Leeds) regarded as a typical representative of the genus Flavobacterium, flexirubin-type pigments have been identified. The Flavobacterium pigments contain structural elements of both, the pigments of the genus Flexibacter and the pigments of the genus Cytophaga. As flexirubin-type pigments seem to have a rather restricted distribution among bacteria, and have formerly proved to be useful chemosystematic markers for the flexibacteria, this new observation may indicate that there is a relatively close phylogenetic relationship between this type of flavobacteria and the Cytophaga-Flexibacter group.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-5117
    Keywords: Cadmium ; zinc ; pollution ; sediment ; water ; fish ; clams ; macrophytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Levels of cadmium and zinc in various components of Williamson Ditch (an industrially contaminated stream flowing into Palestine Lake), Trimble Creek (a stream draining Palestine Lake) and the Tippecance River (a river receiving Trimble Creek) were determined. Water, sediment, plant, fish and clam samples were analyzed for cadmium and zinc content by atomic absorption spectrophotometry. Unweighted mean metal concentrations in Trimble Creek were the following: water, 51 µg Zn/1 and 4.2 µg Cd/1; sediment, 592 µg Zn/g and 48.8,µg Cd/g; plants, 375 µm Zn/g and 7.91 µg Cd/g; fish, 145 µg Zn/g and 6.02 µg Cd/g. These concentrations were generally lower than those found in Williamson Ditch and higher than those found in the Tippecanoe River or background levels previously reported for other aquatic ecosystems.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-5117
    Keywords: Cadmium ; zinc ; pollution ; molluscs ; monitoring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The three-ridge clamAmblema perplicata was used to monitor two streams for the presence of zinc (Zn) and cadmium (Cd) derived from an industrial source. Clams were collected from a relatively uncontaminated area in one river and transported to four study sites in the two contaminated streams. The clams were placed into polyethylene cages and left in these streams for one week. Control clams were treated in a similar manner and left in the uncontaminated river. The highest mean concentration of Zn (956 µg/g dry wt) was found in the gill tissue of clams from the most contaminated site. The highest mean Cd concentration (18.6 µg/ g dry wt) was found in digestive glands of clams, also from the most contaminated site. Mean concentrations at contaminated sites were significantly higher than background and control levels; the findings suggest that these particular organs of clams may be useful in monitoring levels of Zn and Cd in other freshwater systems.
    Type of Medium: Electronic Resource
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