Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/46325
Título: | Modulating antioxidant activity and the controlled release capability of laccase mediated catechin grafting of chitosan |
Autor(es): | Kim, Suyeon Requejo, Katherinne Isabel Nakamatsu, Javier Gonzales, Karen N. Torres, Fernando G. Cavaco-Paulo, Artur |
Palavras-chave: | Antioxidant activity Controlled release Laccase o-quinones Enzymatic grafting |
Data: | Ago-2017 |
Editora: | Elsevier 1 |
Revista: | Process Biochemistry |
Citação: | Kim, 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 |
Resumo(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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/46325 |
DOI: | 10.1016/j.procbio.2016.12.002 |
ISSN: | 1359-5113 |
Versão da editora: | http://www.journals.elsevier.com/process-biochemistry/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_46467_1.pdf | 1,96 MB | Adobe PDF | Ver/Abrir |