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4 hydroxyphenylacetic acid/dantų ėduonis
Nuoroda įrašoma į mainų sritį
3 rezultatus
Nitration of the salivary component 4-hydroxyphenylacetic acid in the human oral cavity: enhancement of nitration under acidic conditions.
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Prisijungti Registracija
4-Hydroxyphenylacetic acid (HPA) and nitrite are present in human mixed whole saliva, and HPA can be nitrated by peroxidase/hydrogen peroxide (H(2)O(2))/nitrite systems in the oral cavity. Thus, the objectives of the present study were to estimate the concentrations of HPA, nitrated HPA
Human salivary peroxidase-catalyzed oxidation of nitrite and nitration of salivary components 4-hydroxyphenylacetic acid and proteins.
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Prisijungti Registracija
Human saliva contains high activities of peroxidase and high concentrations of nitrite (about 0.2 mM in average). If H2O2 is provided by bacteria and leukocytes in the oral cavity, peroxidase-dependent formation of reactive nitrogen species, which can nitrate phenolics like 4-hydroxyphenylacetic
Quercetin-dependent inhibition of nitration induced by peroxidase/H2O2/nitrite systems in human saliva and characterization of an oxidation product of quercetin formed during the inhibition.
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Prisijungti Registracija
Local pH in the oral cavity can decrease to below 7 at the site where acid-producing bacteria are proliferating. Effects of pH on nitration of 4-hydroxyphenylacetic acid were studied using dialyzed human saliva. Dialyzed saliva nitrated 4-hydroxyphenylacetic acid to 4-hydroxy-3-nitrophenylacetic
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