Redox potential measurement as a rapid method for microbiological testing and its validation for coliform determination

Reichart, O.; Szakmár, K.; Jóźwiak, Adam; Felföldi, József; Baranyai, László

doi:10.1016/j.ijfoodmicro.2006.08.016

Cited by 44 publications

(41 citation statements)

References 3 publications

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“…Although we only used a limited number of (facultative) aerobic bacteria, these findings seem to suggest that bacteria that naturally occur in aquatic environment actively control redox conditions. This supports the notion that this phenomenon may be more widespread than previously anticipated (Reichart et al 2007). Electrical properties of bacterial communities are often attributed to extracellular electron shuttling by bacteria Micrococcus luteus 332 ± 30 308 ± 38…”

Section: Discussionsupporting

confidence: 90%

“…This corroborates redox development described for other bacterial species (e.g. Brasca et al 2007;Reichart et al 2007;Tachon et al 2010). At the onset of the stationary growth phase, redox potential measurements became more variable.…”

Section: Discussionsupporting

confidence: 89%

“…Grishanin et al 1991;Bespalov et al 1996). This phenomenon has been demonstrated for a limited number of bacterial species, but may be more widespread than previously anticipated (Rabaey et al 2007;Reichart et al 2007). …”

Section: Introductionmentioning

confidence: 62%

“…Increasing evidence suggests that bacteria are capable of creating redox conditions which are visible as speciesspecific continuous E h measurements (Brasca et al 2007;Reichart et al 2007;Michelon et al 2010;Ignatova et al 2010;Tachon et al 2010). It has been demonstrated that continuous measurements of E h are valuable for tracking bacterial metabolic activities in liquid cultures (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Contribution of bacteria to redox potential (E h) measurements in sediments

Hunting

Kampfraath

2012

Int. J. Environ. Sci. Technol.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

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Contribution of bacteria to redox potential (E h) measurements in sediments

Hunting

Kampfraath

2012

Int. J. Environ. Sci. Technol.

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“…The instrumental procedure based on redox potential measurement was originally developed for rapid determination of viable count of several microorganisms in water, milk, foods, hygienic samples, etc. (rEichart et al, 2007;Erdősi et al, 2012). The aim of the present work was to develop a protocol for rapid detection of Salmonella by the combination of the redox potential based and real-time PCR methods in a simple time and cost-effective manner.…”

mentioning

confidence: 99%

Rapid detection ofSalmonellain food by redox-potential measurement based method combined with real-time PCR

Erdősi¹,

Szakmár²,

Reichart³

et al. 2014

Acta Alimentaria

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The classical ISO (2002) standard as reference method and the combination of redox potential measurement with real-time PCR technique were applied to detect Salmonella in milk, egg, broiler meat, and artificially contaminated egg samples. Food samples of 25 g were homogenized in 225 ml of RVS broth to prepare the basic suspension of the comparative tests. In the combined method the redox potential measurement technique serves as the selective enrichment system of the real-time PCR equipment. The reliable screening of Salmonella-free, negative samples by the redox potential measurement technique needed only 24 h. These negative samples determined by the PCR and the classical standard method in all cases proved to be negative as well. In case of positive redox result the Salmonella from the enriched suspension of the redox test-cell was identified by real-time PCR in 3 hours, instead of the conventional biochemical identification. Comparing our protocol to the ISO (2002) standard method, the total detection time of Salmonella presence/absence was less than 24 h contrary to the 114 h of the conventional method.

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A Bacteria‐Responsive Porphyrin for Adaptable Photodynamic/Photothermal Therapy

Wang

Yang

et al. 2022

Angewandte Chemie

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We report a cationic porphyrin 5,10,15,20‐tetrakis‐(4‐N‐methylpyridyl)‐porphyrin (TMPyP) that can respond to specific bacteria, followed by adaptable photodynamic/photothermal therapy processes. TMPyP could be reduced to phlorin by facultative anaerobes with a strong reducing ability such as E. coli and S. typhimurium in hypoxic environments, possessing strong NIR absorption and remarkable photothermal conversion capacity, thus demonstrating excellent antimicrobial activity (>99 %) by photothermal therapy. While in an aerobic environment with aerobic bacteria, TMPyP functioned as a typical photosensitizer that killed bacteria effectively (>99.9 %) by photodynamic therapy. By forming a host–guest complex with cucurbit[7]uril, the biocompatibility of TMPyP significantly improved. This kind of bacteria‐responsive porphyrin shows specificity and adaptivity in antimicrobial treatment and holds potential in non‐invasive treatments of bacterial infections.

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Redox potential measurement as a rapid method for microbiological testing and its validation for coliform determination

Cited by 44 publications

References 3 publications

Contribution of bacteria to redox potential (E h) measurements in sediments

Contribution of bacteria to redox potential (E h) measurements in sediments

Rapid detection ofSalmonellain food by redox-potential measurement based method combined with real-time PCR

A Bacteria‐Responsive Porphyrin for Adaptable Photodynamic/Photothermal Therapy

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