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Your search keyword '"Csoregi, E."' showing total 23 results
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23 results on '"Csoregi, E."'

2. Formaldehyde sensitive conductimetric sensors based on commercial and recombinant formaldehyde deshydrogenase

Author

Korpan, Y., Soldatkin, O., Sosovska, O., Klepach, H., Csoregi, E., Vocanson, Francis, Jaffrezic-Renault, N., Gonchar, M., Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine (NASU), Sciences Analytiques (SA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Ivan Franco State, University of Drohobich, Sci Tech Link HB, Laboratoire Hubert Curien [Saint Etienne] (LHC), Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), and Institute of cell biology

Subjects
[CHIM.MATE]Chemical Sciences/Material chemistry, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2010

5. Simultaneous amperometric determination of some mono-, di-, and oligosaccharides in flow injection and liquid chromatography using two working enzyme electrodes with different selectivity

Author

Tessema, M, Larsson, T, Buttler, T, Csoregi, E, Ruzgas, T, Nordling, M, Lindquist, SE, Pettersson, G, Gorton, L, Tessema, M, Larsson, T, Buttler, T, Csoregi, E, Ruzgas, T, Nordling, M, Lindquist, SE, Pettersson, G, and Gorton, L

Abstract

A selective dual enzyme electrode system for the monitoring of sugars in flow injection was developed. The working electrodes were based on cellobiose dehydrogenase (CDH) and oligosaccharide dehydrogenase (ODH) 'wired' with an osmium-based redox polymer o, Addresses: LUND UNIV, DEPT ANALYT CHEM, SE-22100 LUND, SWEDEN. UNIV ADDIS ABABA, DEPT CHEM, ADDIS ABABA, ETHIOPIA. UNIV UPPSALA, DEPT PHYS CHEM, SE-75121 UPPSALA, SWEDEN. INST BIOCHEM, ENZYME CHEM LAB, LT-2600 VILNIUS, LITHUANIA. UNIV UPPSALA, DEPT BIOCHE

Published
1997

23. Redox hydrogel-based amperometric bienzyme electrodes for fish freshness monitoring

Author

Niculescu M, Nistor C, Frebort I I, Pec P, Mattiasson B, and Csoregi E

Abstract

This work presents the design and optimization of amperometric biosensors for the determination of biogenic amines (e.g., histamine, putrescine, cadaverine, tyramine, cystamine, agmatine, spermidine), commonly present in food products, and their application for monitoring of freshness in fish samples. The biosensors were used as the working electrodes of a three-electrode electrochemical cell of wall-jet type, operated at -50 mV vs Ag/AgCl, in a flow injection system. Two different bienzyme electrode designs were considered, one based on the two enzymes [a newly isolated and purified amine oxidase (AO) and horseradish peroxidase (HRP)] simply adsorbed onto graphite electrodes, and one when they were cross-linked to an Os-based redox polymer. The redox hydrogel-based biosensors showed better biosensors characteristics, i.e., sensitivity of 0.194 A M-1 cm-2 for putrescine and 0.073 A M-1 cm-2 for histamine, and detection limits (calculated as three times the signal-to-noise ratio) of 0.17 microM for putrescine and 0.33 microM for histamine. The optimized redox hydrogel-based biosensors were evaluated in terms of stability and selectivity, and were used for the determination of total amine content in fish samples kept for 10 days in different conditions.

Published
2000
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