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High sensitivity biosensor measurement based on synchronous detection
J. Krejci, V. Ondruch, J. Maly, M. Stofik, D. Krejcova, H. Vranova,
Jazyk angličtina Země Švýcarsko
Typ dokumentu časopisecké články, práce podpořená grantem
- MeSH
- biosenzitivní techniky metody MeSH
- časové faktory MeSH
- enzymy imobilizované antagonisté a inhibitory metabolismus MeSH
- fotosystém II (proteinový komplex) antagonisté a inhibitory metabolismus MeSH
- inhibitory enzymů farmakologie MeSH
- kinetika MeSH
- Synechococcus enzymologie MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The principle of synchronous detection (SD) has been applied to biosensor measurement. SD principle achieves significant increases in the signal to noise ratio, limit of detection and overall measurement robustness. Application of SD in biosensor measurement improves the analysis of the response and avoids the influence of interference/noise produced by stirring, electromagnetic effects and influence of parasitic currents. SD also enables the decomposition of signal to stimulation response and phenomena with long time of response. Second-order phenomena are identifiable in the signal. Linear statistical model was used to develop software for identification of the stimulation signal in the output current. SD was applied to the response signal of a Photosystem II complex (PSII) biosensor. PSII response to light stimulation follows first order kinetics. The inhibition kinetics of PSII has been studied. Kinetic constants of herbicide binding to PSII depend linearly on herbicide concentration and enable measurement of its concentration at low concentrations (linear range for diuron is 10⁻⁶ to 10⁻⁴ mM).
Citace poskytuje Crossref.org
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