Data/hora: 24/06/2024 00:52:06

Biblioteca(s): | Embrapa Agroindústria Tropical; Embrapa Algodão.
Data corrente: | 03/01/2018
Data da última atualização: | 17/01/2018
Autoria: | SANTOS, T. M.; SOUZA FILHO, M. de S. M. de; MUNIZ, C. R.; MORAIS, J. P. S.; KOTZEBUE, L. R. V.; PEREIRA, A. L. S.; AZEREDO, H. M. C. de.
Afiliação: | TALITA M. SANTOS, UFCE; MEN DE SA MOREIRA DE SOUZA FILHO, CNPAT; CELLI RODRIGUES MUNIZ, CNPAT; JOAO PAULO SARAIVA MORAIS, CNPA; LLOYD RYAN VIANA KOTZEBUE, UFCE; ANDRÉ LUÍS SOUSA PEREIRA, UFCE; HENRIETTE MONTEIRO C DE AZEREDO, CNPAT.
Título: | Zein films with unoxidized or oxidized tannic acid.
Ano de publicação: | 2017
Fonte/Imprenta: | Journal of the Science of Food and Agriculture, v. 97, n. 13, p. 4580-4587, 2017.
DOI: | 10.1002/jsfa.8327
Idioma: | Inglês
Conteúdo: | Corn zein is apredominatlyhydrophobicprotein, formingfilmswith relativelygoodwater resistance.Tannic acid, especially in its oxidized form, is supposed to cross-link proteins including zein, which may be explored to further enhance the water resistance of zein films. The effects of different contents (0-8 wt%) of unoxidized and oxidized tannic acid (uTA and oTA, respectively) on the properties of zein films at different pH values (4-9) were studied, according to central composite designs. Increasing tannic acid contents and pH values resulted in decreased water solubility and increased tensile strength andmodulus of films. The presence of tannic acid provided the films with a yellowish color and increased opacity. Paired t-tests indicated that oTA films presented higher tensile strength, lower water vapor permeability and lower water solubility than uTA films. Higher tannic acid contents and pH values resulted in films with better overall physical properties, which might be ascribed to cross-linking, although the films were still not water resistant. The resulting films have potential to be used for food packaging and coating applications.
Palavras-Chave: | Ácidos fenólicos; Biodegradable films; Cross-linking; Filme biodegradável; Filmes biodegradáveis; Protein; Tannic acid.
Thesagro: | Ácido tânico; Cruzamento; Proteína; Retículo.
Thesaurus Nal: | Phenolic acids.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/171179/1/ART17065.pdf
Registro original: | Embrapa Algodão (CNPA)

Exemplares:

CNPA - (28503-1) - UPC - AP - DD -  -  -  - DIS
CNPAT - (15357-1) - UPC - AP - DD -  -  - 2018.008 - DIS