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  • Accumulation  (2)
  • Soil  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Germanium accumulation by bacteria (1989)
    Springer
    Archives of microbiology 152 (1989), S. 533-538 
    Details
    ISSN: 1432-072X
    Keywords: Accumulation ; Bacillus ; Bacteria ; Catechol ; Germanium ; Metal ; Pseudomonas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Germanium accumulation was investigated in 23 bacterial strains. Bacillus strains accumulated the most Ge. Increasing the pH of the incubation medium from 7 to 8.5, as well as substituting catechol for glucose resulted in increased Ge accumulation. The apparent K s and V max of Ge accumulation in Bacillus cereus NRC 3045 were found to be 4.0 g/l and 2.2 mg/g dry wt/h, respectively. When cells from three different Bacillus strains were incubated in the presence of 2,4-dinitrophenol or toluene, Ge accumulation was completely inhibited. At 6° C, two out of three Bacillus strains showed a large decrease in Ge accumulation. In addition, non-viable Bacillus cells killed by UV irradiation did not accumulate Ge. These results strongly suggest that Ge accumulation by some Bacillus strains may be an energy-dependent process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00425482
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Silver accumulation and resistance in Pseudomonas stutzeri (1992)
    Springer
    Archives of microbiology 158 (1992), S. 398-404 
    Details
    ISSN: 1432-072X
    Keywords: Accumulation ; Complexation ; Energydispersive X-ray ; Metabolic inhibitors ; Pseudomonas stutzeri ; Ag-resistance ; Ag-sensitivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Silver (Ag) resistance and accumulation were investigated in Ag-resistant Pseudomonas stutzeri strain AG259 and Ag-sensitive P. stutzeri strain JM303. Both strains exhibited a similar pattern of silver accumulation although to different final concentrations. Energy-dispersive X-ray analyses revealed the association of dense silver deposits with the Ag-resistant strain, but not the Ag-sensitive strain. Toluene permeabilization or incubation of cells at 2°C resulted in decreased Ag accumulation in both strains. This suggests that Ag accumulation may be energy dependent. A decrease in Ag accumulation was observed when cells were pretreated with 2,4-dinitrophenol (2,4-DNP). No decrease was observed using carbonyl cyanide m-chlorphenyl-hydrazone (CCCP). However, it was observed that both 2,4-DNP and CCCP complexed to Ag, making interpretation of accumulation results difficult. Washing of cells incubated in the presence of Ag with ethylenediaminetetraacetic acid (EDTA) or hydrochloric acid did not result in decreased Ag accumulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276299
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  • 3
    Electronic Resource
    Electronic Resource
    Selected factors limiting the microbial degradation of recalcitrant compounds (1993)
    Springer
    Journal of industrial microbiology and biotechnology 12 (1993), S. 379-395 
    Details
    ISSN: 1476-5535
    Keywords: Availability ; Biodegradation ; Limiting factors ; Microbial ; Recalcitrant ; Soil ; Toxic ; Xenobiotic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The focus of this review is to examine some of the reasons biodegradation may not take place in the environment even though its occurrence in the laboratory has been demonstrated. Some approaches for dealing with chemical persistence will be discussed. In addition, the potential of bioremediation as an in situ clean-up technology will be considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01569669
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  • 4
    Electronic Resource
    Electronic Resource
    Evaluation of microbial surfactants for recovery of hydrophobic pollutants from soil (1993)
    Springer
    Journal of industrial microbiology and biotechnology 11 (1993), S. 163-170 
    Details
    ISSN: 1476-5535
    Keywords: Acinetobacter calcoaceticus ; Bioemulsifier ; Biosurfactant ; Hydrophobic ; Hydrocarbon ; Pseudomonas aeruginosa ; Partitioning ; Recovery ; Remediation ; Soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Several microbially produced biosurfactants were evaluated for their ability to remove hydrophobic compounds from soil. The biosurfactants produced byPseudomonas aeruginosa UG2 andAcinetobacter calcoaceticus RAG-1 displayed the best results, with recovery of [14C]hexachlorobiphenyl from soil slurries of 48.0 and 41.9%, respectively.P. aeruginosa UG2 produced higher levels of extracellular biosurfactants than four otherP. aeruginosa strains.P. aeruginosa UG2 culture filtrate containing biosurfactants enhanced the recovery of several other individual hydrocarbons and polychlorinated biphenyl compounds, as well as several hydrocarbons in a mixture, from soil. The results, suggest that biosurfactants produced byP. aeruginosa UG2 have the potential for remediation of hydrophobic pollutants in soil environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01583718
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