Microbial and cytoplasmic membrane-based potentiometric biosensors for direct determination of organophosphorus insecticides
Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degr...
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2000 |
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| Umfang: |
7 |
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| Reproduktion: |
Springer Online Journal Archives 1860-2002 |
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| Übergeordnetes Werk: |
in: Applied microbiology and biotechnology - 1975, 54(2000) vom: Mai, Seite 652-658 |
| Übergeordnetes Werk: |
volume:54 ; year:2000 ; month:05 ; pages:652-658 ; extent:7 |
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| 520 | |a Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. | ||
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(DE-627)NLEJ202764508 DE-627 ger DE-627 rakwb eng Microbial and cytoplasmic membrane-based potentiometric biosensors for direct determination of organophosphorus insecticides 2000 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. Springer Online Journal Archives 1860-2002 Gäberlein, S. oth Spener, F. oth Zaborosch, C. oth in Applied microbiology and biotechnology 1975 54(2000) vom: Mai, Seite 652-658 (DE-627)NLEJ188988920 (DE-600)1464336-4 1432-0614 nnns volume:54 year:2000 month:05 pages:652-658 extent:7 http://dx.doi.org/10.1007/s002530000437 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 54 2000 5 652-658 7 |
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(DE-627)NLEJ202764508 DE-627 ger DE-627 rakwb eng Microbial and cytoplasmic membrane-based potentiometric biosensors for direct determination of organophosphorus insecticides 2000 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. Springer Online Journal Archives 1860-2002 Gäberlein, S. oth Spener, F. oth Zaborosch, C. oth in Applied microbiology and biotechnology 1975 54(2000) vom: Mai, Seite 652-658 (DE-627)NLEJ188988920 (DE-600)1464336-4 1432-0614 nnns volume:54 year:2000 month:05 pages:652-658 extent:7 http://dx.doi.org/10.1007/s002530000437 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 54 2000 5 652-658 7 |
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(DE-627)NLEJ202764508 DE-627 ger DE-627 rakwb eng Microbial and cytoplasmic membrane-based potentiometric biosensors for direct determination of organophosphorus insecticides 2000 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. Springer Online Journal Archives 1860-2002 Gäberlein, S. oth Spener, F. oth Zaborosch, C. oth in Applied microbiology and biotechnology 1975 54(2000) vom: Mai, Seite 652-658 (DE-627)NLEJ188988920 (DE-600)1464336-4 1432-0614 nnns volume:54 year:2000 month:05 pages:652-658 extent:7 http://dx.doi.org/10.1007/s002530000437 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 54 2000 5 652-658 7 |
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(DE-627)NLEJ202764508 DE-627 ger DE-627 rakwb eng Microbial and cytoplasmic membrane-based potentiometric biosensors for direct determination of organophosphorus insecticides 2000 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. Springer Online Journal Archives 1860-2002 Gäberlein, S. oth Spener, F. oth Zaborosch, C. oth in Applied microbiology and biotechnology 1975 54(2000) vom: Mai, Seite 652-658 (DE-627)NLEJ188988920 (DE-600)1464336-4 1432-0614 nnns volume:54 year:2000 month:05 pages:652-658 extent:7 http://dx.doi.org/10.1007/s002530000437 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 54 2000 5 652-658 7 |
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(DE-627)NLEJ202764508 DE-627 ger DE-627 rakwb eng Microbial and cytoplasmic membrane-based potentiometric biosensors for direct determination of organophosphorus insecticides 2000 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. Springer Online Journal Archives 1860-2002 Gäberlein, S. oth Spener, F. oth Zaborosch, C. oth in Applied microbiology and biotechnology 1975 54(2000) vom: Mai, Seite 652-658 (DE-627)NLEJ188988920 (DE-600)1464336-4 1432-0614 nnns volume:54 year:2000 month:05 pages:652-658 extent:7 http://dx.doi.org/10.1007/s002530000437 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 54 2000 5 652-658 7 |
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Microbial and cytoplasmic membrane-based potentiometric biosensors for direct determination of organophosphorus insecticides |
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Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. |
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Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. |
| abstract_unstemmed |
Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">NLEJ202764508</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230506142411.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070528s2000 xx |||||o 00| ||eng c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ202764508</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Microbial and cytoplasmic membrane-based potentiometric biosensors for direct determination of organophosphorus insecticides</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2000</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">7</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Potentiometric biosensors for the determination of organophosphorus (OP) insecticides were developed by applying either immobilized whole cells or cytoplasmic membrane fractions of wild-type Flavobacterium sp. on the surface of a glass pH electrode. The ability of Flavobacterium sp. to degrade OP compounds as sole carbon source was demonstrated for parathion with a degradation rate of almost 100% after 30 min and for chlorpyrifos of 33% after 48 h incubation. The products of hydrolysis of these compounds, p-nitrophenol and 3,5,6-trichloro-2-pyridinol, were accumulated in the medium and not used as substrates for growth by Flavobacterium sp. In the course of hydrolysis, which is catalyzed by organophosphorus hydrolase, two protons are released for each substrate molecule hydrolyzed. This stoichiometry forms the electrochemical basis of the potentiometric biosensors. Direct determination without previous extraction of OP was carried out in a stirred measuring cell with a pH electrode as transducer. Poly(carbamoyl sulfonate) (PCS) prepolymer, a hydrogel with good adhesive properties, was used for immobilization of whole cells and membrane-associated organophosphorus hydrolase. The sensor with cytoplasmic membrane fractions was superior to the one with whole cells and showed a linear range for paraoxon from 0.01 to 0.47 mM and 3 weeks' working stability.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Springer Online Journal Archives 1860-2002</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Gäberlein, S.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Spener, F.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Zaborosch, C.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Applied microbiology and biotechnology</subfield><subfield code="d">1975</subfield><subfield code="g">54(2000) vom: Mai, Seite 652-658</subfield><subfield code="w">(DE-627)NLEJ188988920</subfield><subfield code="w">(DE-600)1464336-4</subfield><subfield code="x">1432-0614</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:54</subfield><subfield code="g">year:2000</subfield><subfield code="g">month:05</subfield><subfield code="g">pages:652-658</subfield><subfield code="g">extent:7</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://dx.doi.org/10.1007/s002530000437</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-SOJ</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">54</subfield><subfield code="j">2000</subfield><subfield code="c">5</subfield><subfield code="h">652-658</subfield><subfield code="g">7</subfield></datafield></record></collection>
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