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  • Bioleaching  (1)
  • Key words Superficial siderosis of the central nervous system  (1)
  • Keywords: exopolymers; Thiobacillus ferrooxidans; covellite; bioleaching  (1)
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Material
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    The role of exopolymers in the bioleaching of a non-ferrous metal sulphide (1999)
    Springer
    Journal of industrial microbiology and biotechnology 22 (1999), S. 88-92 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: exopolymers; Thiobacillus ferrooxidans; covellite; bioleaching
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Exocellular polysaccharides were extracted from Thiobacillus ferrooxidans cells grown in the presence of iron. Cells without these compounds could not adhere to covellite. The loss of the layer of exocellular polysaccharides also affected the direct mechanism of bioleaching of covellite in a negative way. This ability to attach to and leach covellite was restored within a few hours when exopolymeric material was produced again. The addition of exocellular compounds to cells stripped of exocellular polymers also restored their ability to the same level as that of untreated cells. Thiobacillus thiooxidans was not able to attach to and leach covellite even when exocellular compounds from Thiobacillus ferrooxidans were added.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900610
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Superficial siderosis of the central nervous system and anticoagulant therapy: a case report (1999)
    Springer
    Italian journal of neurological sciences 20 (1999), S. 247-249 
    Details
    ISSN: 1126-5442
    Keywords: Key words Superficial siderosis of the central nervous system ; MRI ; Anticoagulant therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Superficial siderosis of the central nervous system is a rare condition characterized by deposition of haemosiderin in the leptomeninges and in the subpial layers of the brain and spinal cord. With the widespread use of magnetic resonance imaging, an increasing number of cases of superficial siderosis are being discovered, secondary forms being more frequent than idiopathic ones. We report a 78-year-old man in oral anticoagulant therapy, who presented neurosensory hearing loss, gait ataxia and spastic paraparesis. Magnetic resonance imaging suggested the diagnosis of superficial siderosis of the central nervous system, without an evident bleeding source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100720050039
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Bioleaching of metallic sulphides withThiobacillus ferrooxidans in the absence of iron (II) (1992)
    Springer
    World journal of microbiology and biotechnology 8 (1992), S. 305-308 
    Details
    ISSN: 1573-0972
    Keywords: Bioleaching ; metallic sulphides ; Thiobacillus ferrooxidans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Bioleaching of metallic sulphides withThiobacillus ferrooxidans in the absence of iron (II) was studied using pure sulphides and mixtures. The direct mode of bacterial action was analysed with respect to sulphide solubility, exposed solid surfaces and bacterial attachment to the solids. Bioleaching of mixed sulphides showed enhancement of metal extraction in comparison with pure sulphides which suggests metal extractions would be better from polymetallic sulphide ores than from similar matrices with only one sulphide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201885
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    Paper (German National Licenses)
    Fulltext
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