The Repetitive Detection of Toluene with Bioluminescence Bioreporter Pseudomonas putida TVA8 Encapsulated in Silica Hydrogel on an Optical Fiber.

0460411 - ÚCHP 2017 RIV CH eng J - Journal Article
Kuncová, Gabriela - Ishizaki, Takayuki - Solovyev, Andrey - Trögl, J. - Ripp, S.
The Repetitive Detection of Toluene with Bioluminescence Bioreporter Pseudomonas putida TVA8 Encapsulated in Silica Hydrogel on an Optical Fiber.
Materials. Roč. 9, č. 6 (2016), s. 467. E-ISSN 1996-1944
Institutional support: RVO:67985858
Keywords : bioluminescent biosensor * silica gel * encapsulation
Subject RIV: CC - Organic Chemistry
Impact factor: 2.654, year: 2016

Living cells of the lux-based bioluminescent bioreporter Pseudomonas putida TVA8 were encapsulated in a silica hydrogel attached to the distal wider end of a tapered quartz fiber. Bioluminescence of immobilized cells was induced with toluene at high (26.5 mg/L) and low (5.3 mg/L) concentrations. Initial bioluminescence maxima were achieved after >12 h. One week after immobilization, a biofilm-like layer of cells had formed on the surface of the silica gel. This resulted in shorter response times and more intensive bioluminescence maxima that appeared as rapidly as 2 h after toluene induction. Considerable second bioluminescence maxima were observed after inductions with 26.5 mg toluene/L. The second and third week after immobilization the biosensor repetitively and semiquantitatively detected toluene in buffered medium. Due to silica gel dissolution and biofilm detachment, the bioluminescent signal was decreasing 20–32 days after immobilization and completely extinguished after 32 days. The reproducible formation of a surface cell layer on the wider end of the tapered optical fiber can be translated to various whole cell bioluminescent
biosensor devices and may serve as a platform for in-situ sensors.
Permanent Link: http://hdl.handle.net/11104/0260985