Abstract:
The Doehlert design was applied in order to investigate the combined effect of nisin and high voltage pulsed electric fields (PEF) on the inactivation of Escherichia coli in simulated milk ultrafiltrate media. Nisin alone was totally inactivated by PEF, but in the presence of bacterial cells a protective effect was observed. However, the effectiveness of nisin was still decreased when bacterial cells were subjected to the combined treatment. In spite of this phenomenon, an almost additive response emerged as a consequence of the combined treatment. A 4-log cycle reduction may be accomplished with around 1,000 IU/ml (7.15 μM) of nisin and three pulses of 11.25 kV/cm or 500 IU/ml for five pulses of the same intensity. The observed efficacy arising from the combination of both treatments suggests the possibility of using PEF for improving the action spectrum of natural antimicrobials.
Registro:
Documento: |
Artículo
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Título: | Combined effect of nisin and pulsed electric fields on the inactivation of Escherichia coli |
Autor: | Terebiznik, M.R.; Jagus, R.J.; Cerrutti, P.; De Huergo, M.S.; Pilosof, A.M.R. |
Filiación: | Departamento de Ing. Química, Universidad de Buenos Aires, Ciudad Universitaria (1428), Buenos Aires, Argentina Depto. de Ing. Industrial, Universidad de Buenos Aires, Ciudad Universitaria (1428), Buenos Aires, Argentina Departamento de Industrias, Universidad de Buenos Aires, Ciudad Universitaria (1428), Buenos Aires, Argentina
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Palabras clave: | antibacterial activity; bacterium culture; culture medium; Escherichia coli; nisin; pulsed electric field; simulation; Bacteria (microorganisms); Escherichia coli |
Año: | 2000
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Volumen: | 63
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Número: | 6
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Página de inicio: | 741
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Página de fin: | 746
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DOI: |
http://dx.doi.org/10.4315/0362-028X-63.6.741 |
Título revista: | Journal of Food Protection
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Título revista abreviado: | J. Food Protection
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ISSN: | 0362028X
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CODEN: | JFPRD
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0362028X_v63_n6_p741_Terebiznik |
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Citas:
---------- APA ----------
Terebiznik, M.R., Jagus, R.J., Cerrutti, P., De Huergo, M.S. & Pilosof, A.M.R.
(2000)
. Combined effect of nisin and pulsed electric fields on the inactivation of Escherichia coli. Journal of Food Protection, 63(6), 741-746.
http://dx.doi.org/10.4315/0362-028X-63.6.741---------- CHICAGO ----------
Terebiznik, M.R., Jagus, R.J., Cerrutti, P., De Huergo, M.S., Pilosof, A.M.R.
"Combined effect of nisin and pulsed electric fields on the inactivation of Escherichia coli"
. Journal of Food Protection 63, no. 6
(2000) : 741-746.
http://dx.doi.org/10.4315/0362-028X-63.6.741---------- MLA ----------
Terebiznik, M.R., Jagus, R.J., Cerrutti, P., De Huergo, M.S., Pilosof, A.M.R.
"Combined effect of nisin and pulsed electric fields on the inactivation of Escherichia coli"
. Journal of Food Protection, vol. 63, no. 6, 2000, pp. 741-746.
http://dx.doi.org/10.4315/0362-028X-63.6.741---------- VANCOUVER ----------
Terebiznik, M.R., Jagus, R.J., Cerrutti, P., De Huergo, M.S., Pilosof, A.M.R. Combined effect of nisin and pulsed electric fields on the inactivation of Escherichia coli. J. Food Protection. 2000;63(6):741-746.
http://dx.doi.org/10.4315/0362-028X-63.6.741