VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Laccase-initiated reaction between phenolic acids and chitosan
    Božič, Mojca, 1978- ; Štrancar, Janez ; Kokol, Vanja
    Phenolic acids are known to possess antioxidant activities whilst chitosan is a biocompatible polymer with antibacterial activity against a broad spectrum of bacteria. Merging both types of molecules ... could therefore provide several potential applications. In this work, antioxidant properties of phenolic acid-functionalized-chitosan were investigated after being prepared from structurally-different phenolic acids (caffeic and gallic acids) and chitosan using the laccase from Trametes versicolor as the reaction initiator. A laccase-mediated oxidation kinetic of phenolic acids was monitored by UV-Vis spectroscopy and cyclic voltammetry, as well as spin-trapping electron paramagnetic resonance spectroscopy (ST-EPR). The pH was shown to have a significant effect on the degree of phenolic acid self-polymerization, indicating the involvement of phenolate anions within the formations of coupled polyphenol products, and their functionalities, i.e. antioxidant activity. All the phenolic acid-functionalized-chitosans displayed greatly improved ABTS radical cation scavenging capacities, compared with the untreated chitosan.
    Vir: Reactive & functional polymers. - ISSN 1381-5148 (Vol. 73, iss. 10, Oct. 2013, str. 1377-1383)
    Vrsta gradiva - članek, sestavni del
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 16593686
    DOI

vir: Reactive & functional polymers. - ISSN 1381-5148 (Vol. 73, iss. 10, Oct. 2013, str. 1377-1383)
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