Please use this identifier to cite or link to this item:

TitleModulating antioxidant activity and the controlled release capability of laccase mediated catechin grafting of chitosan
Author(s)Kim, Suyeon
Requejo, Katherinne Isabel
Nakamatsu, Javier
Gonzales, Karen N.
Torres, Fernando G.
Cavaco-Paulo, Artur
KeywordsAntioxidant activity
Controlled release
Enzymatic grafting
Issue dateAug-2017
JournalProcess Biochemistry
CitationKim, Suyeon; Requejo, Katherinne Isabel; Nakamatsu, Javier; Gonzales, Karen N.; Torres, Fernando G.; Cavaco-Paulo, Artur, Modulating antioxidant activity and the controlled release capability of laccase mediated catechin grafting of chitosan. Process Biochemistry, 59, Part A, 65-76, 2017
Abstract(s)Laccase from ascomycete Myceliophthora thermophila was used for the oxidation and grafting of catechin (CA) and chitosan (CS). The enzymatic grafting of CA into CS resulted in the improvement of natural properties of chitosan films. The successful grafting of CA to CS was supported by UV-Visible and Fourier transform infrared (FT-IR) spectroscopies. The differences in the molecular weight and the degree of deacetylation of the CS affected on the enzymatic grafting rate and thus on the film properties like swelling behaviour, erosion rate, thermal property, tensile strength and breaking strain. The CS films prepared by enzymatic grafting presented high antioxidant activity compared to native CS films. The controlled release profiles of methylene blue and coomassie brilliant blue dye, having different acidity/basicity properties, loaded films were also studied with different release medium. The types of molecule loaded into films, the preparation manner of films and the release medium were decisive parameters affecting the release rate.
Publisher version
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

Files in This Item:
File Description SizeFormat 
document_46467_1.pdf1,96 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID