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1.
Bull Environ Contam Toxicol ; 79(5): 483-7, 2007 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-17943222

RESUMO

The genotoxicity of industrial soils was evaluated. A single cell electrophoresis assay or comet assay, using eleocyte cells of Eisenia foetida, was performed to assess the genotoxicity of aqueous elutions. These were obtained from industrial soils containing metals. All soil samples meet the environmental quality guidelines for metal concentrations. However, elutions have produced genotoxic effects at dilutions as low as 6%. Total metal concentrations for each aqueous elution could express synergistic effects of these compounds.


Assuntos
Resíduos Industriais , Oligoquetos/efeitos dos fármacos , Poluentes do Solo/química , Poluentes do Solo/toxicidade , Solo/análise , Animais , Ensaio Cometa , Monitoramento Ambiental , Metais/análise , Mutagênicos/química , Mutagênicos/toxicidade
12.
Arch Environ Contam Toxicol ; 19(4): 523-9, 1990.
Artigo em Inglês | MEDLINE | ID: mdl-2386408

RESUMO

The effects of a paraquat commercial herbicide formulation on an early stage of the development of Plecostomus commersoni were evaluated. Mortality, opercular ventilation rate, cardiac contraction rate and body length and weight were examined every 12 hr. The effects of the paraquat formulation on the morphology of the branchial epithelium were also examined by light microscopy. The assayed paraquat formulation significantly affected cardiac contraction and opercular ventilation. Ecotoxicologically, this could represent an important deleterious effect for early development of the catfish. Mortality data may not be sufficient for an appropriate evaluation of secondary environmental hazards associated with the application of paraquat formulation because: a) The LC-50 values for Plecostomus commersoni fry were higher than the recommended individual application rate of paraquat for aquatic weed control (0.1-2.0 mg/L). b) The estimated maximum acceptable toxicant concentration (MATC) resulted in a concentration similar to the application rate when calculated from acute toxicity tests. When the MATC was estimated from opercular ventilation or cardiac contraction rates, it was lower and fell within the recommended single application rate.


Assuntos
Peixes-Gato/fisiologia , Paraquat/toxicidade , Animais , Argentina , Feminino , Hemodinâmica/efeitos dos fármacos , Consumo de Oxigênio/efeitos dos fármacos
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