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  • Bacteria  (3)
  • Acidophiles  (2)
  • Springer  (5)
  • American Geophysical Union (AGU)
  • American Physical Society (APS)
  • Elsevier
  • 1990-1994  (5)
Collection
Keywords
Publisher
  • Springer  (5)
  • American Geophysical Union (AGU)
  • American Physical Society (APS)
  • Elsevier
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Bacterial conjugation betweenEscherichia coli andPseudomonas spp. donor and recipient cells in soil (1990)
    Springer
    Journal of industrial microbiology and biotechnology 5 (1990), S. 79-84 
    Details
    ISSN: 1476-5535
    Keywords: Bacteria ; Soil ; Conjugation ; Gene transfer ; Plasmids ; Survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Experiments conducted in microcosms containing loam soil samples inoculated with eitherE. coli orPseudomonas spp. donor and recipient cells showed that bacterial cells survived and conjugated over a 24-h incubation period.E. coli transconjugants were detected 6 h after donor and recipient strains were introduced into sterile soil samples. In non-sterile soil samples, transconjugants were detected between 8 and 24 h incubation.Pseudomonas transconjugants were recovered from sterile soil samples between 6 and 12 h after their introduction and as early as 2 h in non-sterile soil. The results show that genetic interactions occur in non-sterile soil in relatively short periods of time at relatively high transfer frequencies (10−3 to 10−4). Studies on genetic interactions in soil are becoming necessary in risk assessment/environmental impact studies prior to the release of genetically engineered or modified organisms into uncontained environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01573856
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  • 2
    Electronic Resource
    Electronic Resource
    Bacterial interactions with silver (1990)
    Springer
    BioMetals 3 (1990), S. 151-154 
    Details
    ISSN: 1572-8773
    Keywords: Silver ; Nickel ; Bacteria ; Toxicity ; Metal tolerance ; Accumulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary This review examines interactions between bacteria and the biologically non-essential metal, silver. Aspects of silver toxicity, tolerance and accumulation (possible binding and uptake as opposed to energy-dependent transport) in bacteria are discussed. In addition, plasmid biology is examined briefly since little information is available on the exact mechanism(s) of plasmid-endoced silver resistance in bacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01140573
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  • 3
    Electronic Resource
    Electronic Resource
    Heterotrophic growth of Thiobacillus acidophilus in batch and chemostat cultures (1990)
    Springer
    Archives of microbiology 153 (1990), S. 392-398 
    Details
    ISSN: 1432-072X
    Keywords: Thiobacillus acidophilus ; Acidophiles ; Maintenance ; Growth yields ; Organic acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Heterotrophic growth of the facultatively chemolithoautotrophic acidophile Thiobacillus acidophilus was studied in batch cultures and in carbon-limited chemostat cultures. The spectrum of carbon sources supporting heterotrophic growth in batch cultures was limited to a number of sugars and some other simple organic compounds. In addition to ammonium salts and urea, a number of amino acids could be used as nitrogen sources. Pyruvate served as a sole source of carbon and energy in chemostat cultures, but not in batch cultures. Apparently the low residual concentrations in the steady-state chemostat cultures prevented substrate inhibition that already was observed at 150 μM pyruvate. Molar growth yields of T. acidophilus in heterotrophic chemostat cultures were low. The Y max and maintenance coefficient of T. acidophilus grown under glucose limitation were 69 g biomass · mol−1 and 0.10 mmol · g−1 · h−1, respectively. Neither the Y max nor the maintenance coefficient of glucose-limited chemostat cultures changed when the culture pH was increased from 3.0 to 4.3. This indicates that in T. acidophilus the maintenance of a large pH gradient is not a major energy-requiring process. Significant activities of ribulose-1,5-bisphosphate carboxylase were retained during heterotrophic growth on a variety of carbon sources, even under conditions of substrate excess. Also thiosulphate- and tetrathionate-oxidising activities were expressed under heterotrophic growth conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00249011
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  • 4
    Electronic Resource
    Electronic Resource
    Energetics of mixotrophic and autotrophic C1-metabolism by Thiobacillus acidophilus (1990)
    Springer
    Archives of microbiology 154 (1990), S. 576-583 
    Details
    ISSN: 1432-072X
    Keywords: Thiobacillus acidophilus ; Acidophiles ; Mixotrophic growth ; Chemostat cultures ; Formate metabolism ; Formaldehyde metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Although the facultatively autotrophic acidophile Thiobacillus acidophilus is unable to grow on formate and formaldehyde in batch cultures, cells from glucose-limited chemostat cultures exhibited substrate-dependent oxygen uptake with these C1-compounds. Oxidation of formate and formaldehyde was uncoupler-sensitive, suggesting that active transport was involved in the metabolism of these compounds. Formate- and formaldehyde-dependent oxygen uptake was strongly inhibited at substrate concentrations above 150 and 400 μM, respectively. However, autotrophic formate-limited chemostat cultures were obtained by carefully increasing the formate to glucose ratio in the reservoir medium of mixotrophic chemostat cultures. The molar growth yield on formate (Y=2.5 g ·mol-1 at a dilution rate of 0.05 h-1) and RuBPCase activities in cell-free extracts suggested that T. acidophilus employs the Calvin cycle for carbon assimilation during growth on formate. T. acidophilus was unable to utilize the C1-compounds methanol and methylamine. Formate-dependent oxygen uptake was expressed constitutively under a variety of growth conditions. Cell-free extracts contained both dye-linked and NAD-dependent formate dehydrogenase activities. NAD-dependent oxidation of formaldehyde required reduced glutathione. In addition, cell-free extracts contained a dye-linked formaldehyde dehydrogenase activity. Mixotrophic growth yields were higher than the sum of the heterotrophic and autotrophic yields. A quantitative analysis of the mixotrophic growth studies revealed that formaldehyde was a more effective energy source than formate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248839
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  • 5
    Electronic Resource
    Electronic Resource
    Bacterial species in raw and cured compost from a large-scale urban composter (1994)
    Springer
    Journal of industrial microbiology and biotechnology 13 (1994), S. 177-182 
    Details
    ISSN: 1476-5535
    Keywords: Antibiotic resistance ; Bacteria ; Compost ; Metal-resistance ; Thermophilic bacteria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Raw and cured compost samples from a large-scale urban composter were studied over a period of eight months to gain information on bacterial species present. Total viable, aerobic heterotrophic bacteria, lactose-positive bacteria, antibiotic and metal-resistant bacteria and thermophilic bacteria were enumerated. Both raw and cured compost samples contained metal and antibiotic-tolerant bacteria (〈Log 3.0 to Log 8.5 CFU g−1 compost) as well as high numbers (as high as Log 7.4 CFU g−1 dry weight compost) of thermophilic bacteria isolated by growth at 55 °C. Selected colonies were also identified using the Biolog 95 substrate identification system.Escherichia coli andSalmonella spp. were not detected in compost samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01584004
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