Whole-Cell Detectors of Aromatic Hydrocarbon Contaminants Constructed by Immobilization of Bioreporters on Special Optical Fiber Elements

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F27283933%3A_____%2F20%3A00008166" target="_blank" >RIV/27283933:_____/20:00008166 - isvavai.cz</a>

Result on the web

<a href="https://www.imbm.fbmi.cvut.cz/" target="_blank" >https://www.imbm.fbmi.cvut.cz/</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Whole-Cell Detectors of Aromatic Hydrocarbon Contaminants Constructed by Immobilization of Bioreporters on Special Optical Fiber Elements

Original language description

[Student Scientific Conference on Instruments and Methods for Biology and Medicine. Faculty of Biomedical Engineering, Czech Technical University In Prague, Kladno, Sítná 3105, Czech Republic, 8th October 2020] Whole-cell fiber-optic sensor of toluene was prepared by adsorption of Pseudomonas putida TVA8 bioluminescent bioreporter onto a tapered optical fiber element (OFE). Bioreporter immobilization was facilitated by (3-Aminopropyl)triethoxysilane treatment of the OFE. Repeatability of preparation and response of the active part of biosensor was demonstrated in five trials with different OFE geometries, possessing transmittances up to 5.0 %, in which the bioluminescence was induced with toluene solution (26.5 mg L-1 ) for the period of 2 weeks. Longevity of inductions of the biosensor was tested in over 135 days trial, in which the biosensor was induced 68 times with toluene solution (26.5 mg L-1 ). The intensities of bioluminescence gradually decreased due to release of the adsorbed cells but were significantly higher than background noise of the detector. The intensities of bioluminescence induced with contaminated ground water were lower than in mineral medium with the same content of toluene. Ideal shape of OFE, which maximizes the detected signal, was calculated to be a Frustrum cone. The developed sensor layered with positively induced P. putida TVA8 bioreporters was a reliable detector of toluene. Further experiments also immobilized constitutively bioluminescent cells of Escherichia coli 652T7 on OFEs with polyethyleneimine, repetitively induced with Lauria-Bertani medium.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

30201 - Cardiac and Cardiovascular systems

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů