Maintenance and induction of naphthalene degradation activity in Pseudomonas putida and an Alacligenes sp. under different culture conditions

Article Abstract:

Naphthalene degradation is not only maintained in starved (without substrate) Pseudomonas (P.) putida and Alcaligenes cultures, but the rate is higher than in the stationary-phase cultures. This indicates continuation of naphthalene-degrading enzymes during starvation. Naphthalene degradation activity in stationary-phase culture is low in both the bacteria, but that of Alcaligenes is considerably lower than P. putida. Induction of a high rate of naphthalene degradation activity by exposure to naphthalene takes a brief time for P. putida while it takes a longer time for Alcaligenes.

Marine bacteria, Pseudomonas putida, Bacteriology, Xenobiotics, Bacterial cultures

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Differential bioavailability of soil-sorbed naphthalene to two bacterial species

Article Abstract:

The availability of sorbed naphthalene for biodegradation depends on the particular degradative organism used. A kinetic method was used to determine the rate and extent of naphthalene bioavailability to microbial diodegraders. The method used two degradative bacterial species and their activity was compared in soil-free and soil-containing systems. Results show that generalizations cannot be made. Organisms possess species-specific properties that strongly influence the extent of bioavailability of sorbed naphthalene for biodegradation.

Microbiological research

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Assessment of bioavailability of soil-sorbed atrazine

Article Abstract:

Research has been conducted on sorbed atrazine. The authors have investigated the bioavailability of atrazine via the use of a mathematical model which links sorption with disorption, mineralization and biodegradation.

United States, Science & research, Environmental aspects, Genetic aspects, Microbiology, Soil pollution, Microbial populations, Atrazine, Microbial ecology

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