Toluene diffusion and reaction in unsaturated Pseudomonas putida biofilms.

Toluene diffusion and reaction in unsaturated Pseudomonas putida biofilms. Research Abstract Details 

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Toluene diffusion and reaction in unsaturated Pseudomonas putida biofilms. Abstract Text:

Biofilms are frequently studied in the context of submerged or aquatic systems. However, much less is known about biofilms in unsaturated systems, despite their importance to such processes as food spoilage, terrestrial nutrient cycling, and biodegradation of environmental pollutants in soils. Using modeling and experimentation, we have described the biodegradation of toluene in unsaturated media by bacterial biofilms as a function of matric water potential, a dominant variable in unsaturated systems. We experimentally determined diffusion and kinetic parameters for Pseudomonas putida biofilms, then predicted biodegradation rates over a range of matric water potentials. For validation, we measured the rate of toluene depletion by intact biofilms and found the results to reasonably follow the model predictions. The diffusion coefficient for toluene through unsaturated P. putida biofilm averaged 1.3 x 10(7) cm(2)/s, which is approximately two orders of magnitude lower than toluene diffusivity in water. Our studies show that, at the scale of the microbial biofilm, the diffusion of toluene to biodegrading bacteria can limit the overall rate of biological toluene depletion in unsaturated systems. (c) 1997 John Wiley & Sons, Inc. Biotechnol Bioeng 56: 656-670, 1997.

Toluene diffusion and reaction in unsaturated Pseudomonas putida biofilms. Publishing Authors By Initials

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Toluene diffusion and reaction in unsaturated Pseudomonas putida biofilms. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Biotechnology and bioengineering

VOLUME: 56

Page Numbers: 656-70

Journal Abbreviation: Biotechnol. Bioeng.

ISSN: 0006-3592

DAY: 20

MONTH: Dec

YEAR: 1997

Toluene diffusion and reaction in unsaturated Pseudomonas putida biofilms. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Toluene diffusion and reaction in unsaturated Pseudomonas putida biofilms.

AFFILIATION: Department of Environmental Science, Policy and Management, 151 Hilgard Hall, University of California, Berkeley, California 94720.

Country: United States

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MEDLINETA: Biotechnol Bioeng

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