Zuzanna Wojdyła

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Quercetin 2,3-dioxygenase (QDO) is an enzyme which accepts various transition metal ions as cofactors, and cleaves the heterocyclic ring of quercetin with consumption of dioxygen and release of carbon monoxide. QDO from B. subtilis that binds Mn(II) displays an unprecedented nitroxygenase activity, whereby nitroxyl (HNO) is incorporated into quercetin(More)
In the study it was intended to evaluate the concentration of nitrates and nitrites in some food products and samples of potable water collected in Kraków region and compile these results with frequency of recognised toxic methemoglobinemia cases. In the years 1991-1993 91 food samples, 288 samples of tap water from the central waterworks of Kraków and 399(More)
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