Filmes biopoliméricos antimicrobianos para revestimento de sementes de feijão (Phaseolus vulgaris).

• Ano de defesa: 2015
• Autor(a) principal: Araújo, Luana Gomes Cordeiro de
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraíba; Brasil; Engenharia de Materiais; Programa de Pós-Graduação em Ciência e Engenharia de Materiais; UFPB
• Palavras-chave em Português: Zeína; Sementes; Eugenol; Atividade antimicrobiana; Recobrimentos; Zein; Seeds; Antimicrobial activity; Coatings; CNPQ::ENGENHARIAS
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/123456789/14227

In this study, we evaluated the use of zein based films, maize storage protein, to the bean seed coating (Phaseolus vulgaris). The tested solutions were obtained using 1% by weight of zein and 4% alcohol solution. Initially, a study was conducted with four different alcoholic solution (ethanol, isopropanol, methanol and ethanol / sodium hydroxide solution), where it was shown that the film properties are affected by the type of solvent used. The films used in the coating of the bean seeds were prepared with ethanol and eugenol incorporated with different concentrations of 5, 10, 15 and 20%. Characterization thermal, morphological, and mechanical barriers were made to study the effect of eugenol on the properties of zein films, where it was observed that eugenol reduced glass transition temperature of the films, reduced porosity and increased irregularities on the surface of the films left most hydrophilic films and reduced modulus and permeability to water vapor. To evaluate the antifungal action of the films against the fungus Penicillium sp. we performed the inhibition zone test and eugenol all concentrations tested showed activity against the fungus. Of these, eugenol two concentrations were tested covering the seed 5 and 20%. The films obtained in 5% eugenol did not affect the germination of the seeds unlike films with 20% eugenol. Both concentrations decreased the rate of seed germination.