Simazine degradation by immobilized and suspended soil bacterium
Simazine is one of the most heavily used herbicides for weed control in the production of a variety of agricultural crops. Few microorganisms have been isolated that metabolize S-triazines such as simazine at rates that are suitable for environmental remediation. DSZ1 strain cells were immobilized b...
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Published in | International biodeterioration & biodegradation Vol. 40; no. 2; pp. 93 - 99 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
1997
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Subjects | |
Online Access | Get full text |
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Summary: | Simazine is one of the most heavily used herbicides for weed control in the production of a variety of agricultural crops. Few microorganisms have been isolated that metabolize S-triazines such as simazine at rates that are suitable for environmental remediation.
DSZ1 strain cells were immobilized by adsorption onto ceramic supports. Kinetic parameters were estimated using nonlinear parameter estimation methods and compared between immobilized and suspended cells. The effect of substrate concentration and inoculum size/support ratio on kinetic parameters was investigated. Physiological status of immobilized cells was assessed by measuring their capacity for degrading the herbicide and this capacity was compared to that of free-living cells under different experimental conditions.
La simazina es uno de los herbicidas más utilizados en una amplia variedad de cultivos agrícolas. Hasta la fecha, son pocos los microorganismos aislados que tienen capacidad para metabolizar triazinas como la simazina, y que por tanto puedan ser utilizados en sistemas de descontaminación medioambiental. La estirpe DSZ1 ha sido inmovilizada sobre un soporte cerámico. Se han estimado los parámetros cinéticos de cultivos de células en suspensión e inmovilizadas, utilizando métodos no lineales de estimación. Se ha estudiado el efecto de la concentración de sustrato y del tamaño de inóculo sobre los parámetros cinéticos. La capacidad de las células de esta estirpe para degradar el herbicida en diferentes condiciones ha confirmado el mantenimiento de su viabilidad una vez inmovilizadas. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-2 ObjectType-Feature-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Conference-3 |
ISSN: | 0964-8305 1879-0208 |
DOI: | 10.1016/S0964-8305(97)00049-8 |