Uptake and active efflux of polycyclic aromatic hydrocarbons by Pseudomonas fluorescens LP6a

Article Abstract:

Pseudomonas fluorescens LP6a uses passive diffusion and an energy-driven efflux system to transport polycyclic aromatic hydrocarbons (PAHs) out of the cell. The efflux system appears to be selective because some PAHs are transported out of the cell whereas others are not.

Physiological aspects, Biological transport, Active, Active biological transport, Polycyclic aromatic hydrocarbons, Pseudomonas fluorescens

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Use of a novel fluorinated organosulfur compound to isolate bacteria capable of carbon-sulfur bond cleavage

Article Abstract:

The vacuum residue fraction of heavy crudes contributes to the viscosity of these oils. Screening for microbes that can perform this activity is greatly facilitated by the use of newly synthesized compound, bis- (3- pentafluorophenylpropyl)-sulfide (PFPS), as a novel sulfur source.

Science & research, All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Organosulfur Compounds, Viscosity, Chemical synthesis, Organic sulfur compounds, Properties, Organic sulphur compounds

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Bacterial adhesion to soil contaminants in the presence of surfactants

Article Abstract:

The adhesion of Mycobacterium and Pseudomonas strains to the surfaces of non-aqueous-phase liquid (NAPL) materials found in contaminated soils in the presence of surfactants has been studied. The NAPLs were organic materials obtained from soils of creosote- and petroleum-contaminated sites. Results reveal that both bacterial strains do not adhere to the NAPLs when the concentration of Triton X-100 or Dowfax 8390 is one-half of the critical micelle concentration. This finding suggests that surfactants reduce the uptake of a solid carbon source.

Evaluation, Environmental aspects, Biodegradation, Bacteria, Pseudomonas, Bacterial adhesion, Soil pollution, Mycobacterium, Surface active agents

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