Bistability in the glucose - glucose oxidase - ferricyanide reaction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F12%3A43893713" target="_blank" >RIV/60461373:22340/12:43893713 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Bistability in the glucose - glucose oxidase - ferricyanide reaction

Popis výsledku v původním jazyce

This work is focused on dynamics of the glucose -glucose oxidase - ferricyanide enzymatic reaction with or without sodium hydroxide in a continuous-flow stirred tank reactor (CSTR) and in a batch reactor. This reaction exhibits pH-variations having autocatalytic character and is reported to provide nonlinear dynamic behaviour (bistability, excitability). The dynamical behaviour of the reaction was examined within a wide range of inlet parameters. The main inlet parameters were the ratio of concentrations of sodium hydroxide and ferricyanide and the flow rate (reciprocal residence time). In a batch reactor we observed an autocatalytic drop of pH from slightly basic to medium acidic values. In a CSTR our aim was to find bistability in the absence of sodium hydroxide. For high concentration of glucose we obtained hysteresis loop as the flow rate was changed. Further experiments will be made to observe wider area of bistability and the effect of sodium hydroxide on the hysteresis loop.

Název v anglickém jazyce

Bistability in the glucose - glucose oxidase - ferricyanide reaction

Popis výsledku anglicky

This work is focused on dynamics of the glucose -glucose oxidase - ferricyanide enzymatic reaction with or without sodium hydroxide in a continuous-flow stirred tank reactor (CSTR) and in a batch reactor. This reaction exhibits pH-variations having autocatalytic character and is reported to provide nonlinear dynamic behaviour (bistability, excitability). The dynamical behaviour of the reaction was examined within a wide range of inlet parameters. The main inlet parameters were the ratio of concentrations of sodium hydroxide and ferricyanide and the flow rate (reciprocal residence time). In a batch reactor we observed an autocatalytic drop of pH from slightly basic to medium acidic values. In a CSTR our aim was to find bistability in the absence of sodium hydroxide. For high concentration of glucose we obtained hysteresis loop as the flow rate was changed. Further experiments will be made to observe wider area of bistability and the effect of sodium hydroxide on the hysteresis loop.

Druh

D - Stať ve sborníku

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

20th International Congress of Chemical and Process Engineering

ISBN

978-80-905035-1-9

ISSN

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e-ISSN

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Počet stran výsledku

9

Strana od-do

1-9

Název nakladatele

Orgit, s.r.o.

Místo vydání

Praha

Místo konání akce

Prague

Datum konání akce

25. 8. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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