Toxicity of Chlorobenzenes to a Lux-Marked Terrestrial Bacterium, Pseudomonas Fluorescens

Boyd, Elaine M.; Meharg, Andrew A.; Wright, Julian; Killham, Ken

doi:10.1897/1551-5028(1998)017<2134:toctal>2.3.co;2

Cited by 21 publications

(19 citation statements)

References 21 publications

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“…Study of luminescence stimulation by chlorophenols found that there is a relationship between higher stimulation of light output and higher EC50 values with lux-marked biosensors [35][36][37]. A mechanism involving release of fatty acids provided an increase in substrate for the luminescence reaction and therefore an increase in light output [38].…”

Section: Remediation and Controlmentioning

confidence: 99%

Pollution Control and Remediation of the Tanning Effluent

Mwinyihija¹

2012

TOEPTJ

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Recent advances have been recorded in the tanning industry with biotechnology in principle playing a very important role through related applied research. This review paper demonstrates that a previously tagged tanning sector as the most hazardous can be resolved through adoption of cleaner technologies, waste management and remedial measures that can be put in place. Pollution is depicted stepwise along the leather processing phases with a selected xenobiotic and contaminants identified such as Sodium chlorides, Chromium, Sulphates, Chlorinated phenolics etc. As an interventionist strategy, biological tools using novel techniques of investigation are shown including the aquatic ecosystems. Remedial methods using known threshold in an identified tannery in Kenya is used to comprehend how to scale down the pollutants eventually. However it is recognised that though phytoremediation potential exist, it will require a combination of several other recently developed methods to provide a much firmer basis of controlling pollution loads related to the tanning Industry.

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Section: Remediation and Controlmentioning

confidence: 99%

Pollution Control and Remediation of the Tanning Effluent

Mwinyihija¹

2012

TOEPTJ

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“…In contrast, indigenous organisms experience the spatial and temporal variability of site-specific factors affecting bioavailability during their life cycle and can be appropriate bioindicators of toxicants in a field setting [8]. Soil microorganisms are good indicators of toxicants in soil environments because they are ubiquitous, sensitive to toxicants [9], and are critically involved in nutrient and geochemical cycles [10].…”

Section: Introductionmentioning

confidence: 99%

Assessment of 2,4,6‐trinitrotoluene toxicity in field soils by pollution‐induced community tolerance, denaturing gradient gel electrophoresis, and seed germination assay

Siciliano

Gong

Sunahara

et al. 2000

Enviro Toxic and Chemistry

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Abstract-Determining the toxicity of contaminants to soil organisms under field conditions is hampered by site-specific and temporal factors that modulate contaminant availability. Assessing the pollution-induced community tolerance (PICT) of indigenous microbial communities integrates these complex environmental factors. The purpose of this study was to determine if the PICT response was proportional to 2,4,6-trinitrotoluene (TNT) concentrations in soil, if changes detected by PICT were also evident in soil microbial community composition, and if the PICT response correlated with phytotoxicity assays. Microorganisms extracted from TNT-contaminated field soils were mixed with a solution containing six different concentrations of TNT and inoculated into Biolog ECO plates. The utilization rate of substrates was determined over a 7-d period. Denaturing gradient gel electrophoretic analysis of a portion of the gene encoding 16S rDNA described the structure of the soil microbial community. Phytoindicators (Poa compressa and P. palustris L.) of TNT pollution were identified and used to assess TNT phytotoxicity in soil samples. The TNT (in Biolog wells) greatly inhibited microbial communities from locations with low in situ TNT exposure. The inhibition of microbial use of L-asparagine, L-phenylalanine, and D-glucosaminic acid by TNT (in Biolog wells) increased as TNT concentration in soil decreased. Locations differing in ECO-PICT response also differed in their microbial community composition and TNT phytotoxicity. Decreased phytotoxicity of field soils corresponded to decreases in PICT. The results from this study indicated that ECO-PICT is an effective assay to rapidly detect TNT exposure and toxicity in soil microbial communities.

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“…Alternatively, this discrepancy may be due to differences in the toxicity of chlorophenols and the chlorobenzenes. Chlorophenol toxicity is due to uncoupling activity [41], and chlorobenzene toxicity is associated with nonspecific, nonpolar narcosis [42].…”

Section: Single-descriptor Regression Analysismentioning

confidence: 99%

Estimation of microbial reductive transformation rates for chlorinated benzenes and phenols using a quantitative structure–activity relationship approach

Tebes-Stevens

Jones

2004

Enviro Toxic and Chemistry

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A set of literature data was used to derive several quantitative structure-activity relationships (QSARs) to predict the rate constants for the microbial reductive dehalogenation of chlorinated aromatics. Dechlorination rate constants for 25 chloroaromatics were corrected for the effects of hydrophobic partitioning and adjusted for the observed distribution of product species. A number of physicochemical properties and molecular parameters were considered for inclusion in the QSARs. Multivariate statistical analyses were used to select the optimal set of descriptors to minimize multicollinearity between the descriptors, as well as to minimize the p-value of the regression coefficients. The final QSAR included four descriptors: The logarithm of the octanol-water partition coefficient (Kow), the summation of the Hammett sigma constants, and the sigma induction constants in the ortho and meta positions relative to the transformation reaction center. The predictive ability of this QSAR was evaluated using 24 site-specific rate constants that were measured in five separate studies and were not used to derive the expression. The peer-reviewed literature was screened carefully to ensure that all rate constant data were representative of environmentally relevant conditions.

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Toxicity of Chlorobenzenes to a Lux-Marked Terrestrial Bacterium, Pseudomonas Fluorescens

Cited by 21 publications

References 21 publications

Pollution Control and Remediation of the Tanning Effluent

Pollution Control and Remediation of the Tanning Effluent

Assessment of 2,4,6‐trinitrotoluene toxicity in field soils by pollution‐induced community tolerance, denaturing gradient gel electrophoresis, and seed germination assay

Estimation of microbial reductive transformation rates for chlorinated benzenes and phenols using a quantitative structure–activity relationship approach

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