| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
|
Data corrente: |
18/05/2023 |
|
Data da última atualização: |
12/04/2024 |
|
Tipo da produção científica: |
Resumo em Anais de Congresso |
|
Autoria: |
CORREA-FILHO, L.; SANTOS JUNIOR, J. R.; BARBOZA, H. T. G.; SOARES, A. G.; TONON, R. V.; CABRAL, L. M. C. |
|
Afiliação: |
LUIZ CORREA-FILHO; JAILTON RIBEIRO DOS SANTOS JUNIOR, UFRRJ; HENRIQUETA TALITA GUIMARAES BARBOZA, CTAA; ANTONIO GOMES SOARES, CTAA; RENATA VALERIANO TONON, CTAA; LOURDES MARIA CORREA CABRAL, CTAA. |
|
Título: |
Potential of chitosan-alginate edible films as packaging for fish meat. |
|
Ano de publicação: |
2023 |
|
Fonte/Imprenta: |
In: CONFERÊNCIA INTERNACIONAL DE PROTEÍNAS E COLOIDES ALIMENTARES, 9., 2023, Rio de Janeiro. Anais... Campinas, Galoá, 2023. |
|
Idioma: |
Inglês |
|
Notas: |
Poster 157740. CIPCA. |
|
Conteúdo: |
Consumers, increasingly aware and informed, tend to demand safe products with proven quality, obtained from good manufacturing and risk control practices. In this context, research has been carried out aimed at replacing synthetic additives with more natural elements, less harmful to consumer health and the environment, whether chemical or microbiological changes. Some animal products like fishs are highly perishable foods, susceptible to rapid microbiological deterioration during storage. In this way, this work aims to develop active chitosan/alginate films incorporated with zinc oxide (ZnO) nanoparticles, aiming to provide an alternative for preserving and increasing the fish shelf life. Films were produced by casting. The polymer concentration in the filmogenic solutions was 1.5%w/v in the following proportions of alginate:chitosan: 100:0; 25:75; 50:50; 75:25 and 0:100. Chitosan solutions were prepared in 1%v/v aqueous acetic acid under magnetic stirring. The alginate was dissolved in distilled water at 60°C under mechanical agitation at 6,500 rpm. Thereafter, a crosslinking with calcium chloride at 1.0% w/w was performed. In all polymeric solutions, 30%w/w glycerol was added. The polymer solutions were poured in an acrylic plate and dried at 35°C for 48 h. The films were characterized regarding chemical, mechanical and barrier properties. All the evaluated formulations resulted in non-rigid and homogeneous films. Alginate and chitosan composite films were less transparent than the single films. Chitosan films were less water soluble than the alginate ones. Films with 100% alginate were completely water-soluble. The sorption degree was in line with the solubility results, i.e., the higher the proportion of chitosan, the lower the sorption degree. Elongation and tensile strength values ranged from 3.67 to 17.87% and 16.10 to 37.87 MPa, respectively. It was observed that the increase in alginate concentration led to an increase in the tensile strength and a reduction in elongation at break. Overall, films produced with more than 75% chitosan concentration showed better potential barrier and mechanical properties, mainly low water solubility and higher elongation at break, being suitable for use in formulations intended to produce edible films. It is expected that films with a higher concentration of chitosan have good potential to conduct the study of films incorporated with ZnO nanoparticles. MenosConsumers, increasingly aware and informed, tend to demand safe products with proven quality, obtained from good manufacturing and risk control practices. In this context, research has been carried out aimed at replacing synthetic additives with more natural elements, less harmful to consumer health and the environment, whether chemical or microbiological changes. Some animal products like fishs are highly perishable foods, susceptible to rapid microbiological deterioration during storage. In this way, this work aims to develop active chitosan/alginate films incorporated with zinc oxide (ZnO) nanoparticles, aiming to provide an alternative for preserving and increasing the fish shelf life. Films were produced by casting. The polymer concentration in the filmogenic solutions was 1.5%w/v in the following proportions of alginate:chitosan: 100:0; 25:75; 50:50; 75:25 and 0:100. Chitosan solutions were prepared in 1%v/v aqueous acetic acid under magnetic stirring. The alginate was dissolved in distilled water at 60°C under mechanical agitation at 6,500 rpm. Thereafter, a crosslinking with calcium chloride at 1.0% w/w was performed. In all polymeric solutions, 30%w/w glycerol was added. The polymer solutions were poured in an acrylic plate and dried at 35°C for 48 h. The films were characterized regarding chemical, mechanical and barrier properties. All the evaluated formulations resulted in non-rigid and homogeneous films. Alginate and chitosan composite films were less transparen... Mostrar Tudo |
|
Palavras-Chave: |
Antimicrobial activity; Biodegradable films. |
|
Thesaurus Nal: |
Zinc oxide. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 03168nam a2200217 a 4500
001 2153809
005 2024-04-12
008 2023 bl uuuu u00u1 u #d
100 1 $aCORREA-FILHO, L.
245 $aPotential of chitosan-alginate edible films as packaging for fish meat.$h[electronic resource]
260 $aIn: CONFERÊNCIA INTERNACIONAL DE PROTEÍNAS E COLOIDES ALIMENTARES, 9., 2023, Rio de Janeiro. Anais... Campinas, Galoá$c2023
500 $aPoster 157740. CIPCA.
520 $aConsumers, increasingly aware and informed, tend to demand safe products with proven quality, obtained from good manufacturing and risk control practices. In this context, research has been carried out aimed at replacing synthetic additives with more natural elements, less harmful to consumer health and the environment, whether chemical or microbiological changes. Some animal products like fishs are highly perishable foods, susceptible to rapid microbiological deterioration during storage. In this way, this work aims to develop active chitosan/alginate films incorporated with zinc oxide (ZnO) nanoparticles, aiming to provide an alternative for preserving and increasing the fish shelf life. Films were produced by casting. The polymer concentration in the filmogenic solutions was 1.5%w/v in the following proportions of alginate:chitosan: 100:0; 25:75; 50:50; 75:25 and 0:100. Chitosan solutions were prepared in 1%v/v aqueous acetic acid under magnetic stirring. The alginate was dissolved in distilled water at 60°C under mechanical agitation at 6,500 rpm. Thereafter, a crosslinking with calcium chloride at 1.0% w/w was performed. In all polymeric solutions, 30%w/w glycerol was added. The polymer solutions were poured in an acrylic plate and dried at 35°C for 48 h. The films were characterized regarding chemical, mechanical and barrier properties. All the evaluated formulations resulted in non-rigid and homogeneous films. Alginate and chitosan composite films were less transparent than the single films. Chitosan films were less water soluble than the alginate ones. Films with 100% alginate were completely water-soluble. The sorption degree was in line with the solubility results, i.e., the higher the proportion of chitosan, the lower the sorption degree. Elongation and tensile strength values ranged from 3.67 to 17.87% and 16.10 to 37.87 MPa, respectively. It was observed that the increase in alginate concentration led to an increase in the tensile strength and a reduction in elongation at break. Overall, films produced with more than 75% chitosan concentration showed better potential barrier and mechanical properties, mainly low water solubility and higher elongation at break, being suitable for use in formulations intended to produce edible films. It is expected that films with a higher concentration of chitosan have good potential to conduct the study of films incorporated with ZnO nanoparticles.
650 $aZinc oxide
653 $aAntimicrobial activity
653 $aBiodegradable films
700 1 $aSANTOS JUNIOR, J. R.
700 1 $aBARBOZA, H. T. G.
700 1 $aSOARES, A. G.
700 1 $aTONON, R. V.
700 1 $aCABRAL, L. M. C.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agroindústria de Alimentos (CTAA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Soja. |
|
Data corrente: |
15/05/2007 |
|
Data da última atualização: |
31/07/2017 |
|
Autoria: |
CIAMPI, M. B.; KURAMAE, E. E.; FENILLE, R. C.; MEYER, M. C.; SOUZA, N. L.; CERESINI, P. C. |
|
Título: |
Intraspecific evolution of Rhizoctonia solani AG-1 IA associated with soybean and rice in Brazil based on polymorphisms at the ITS-5.8S rDNA operon. |
|
Ano de publicação: |
2005 |
|
Fonte/Imprenta: |
European Journal of Plant Pathology, v. 113, n. 2, p. 183-196, Oct. 2005. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Rhizoctonia solani AG-1 IA causes leaf blight on soybean and rice. Despite the fact that R. solani AG-1 IA is a major pathogen affecting soybean and rice in Brazil and elsewhere in the world, little information is available on its genetic diversity and evolution. This study was an attempt to reveal the origin, and the patterns of movement and amplification of epidemiologically significant genotypes of R. solani AG-1 IA from soybean and rice in Brazil. For inferring intraspecific evolution of R. solani AG-1 IA sampled from soybean and rice, networks of ITS-5.8S rDNA sequencing haplotypes were built using the statistical parsimony algorithm from Clement et al. (2000) Molecular Ecology 9: 1657?1660. Higher haplotype diversity (Nei M 1987, Molecular Evolutionary Genetics Columbia University Press, New york: 512p.) was observed for the Brazilian soybean sample of R. solani AG-1 IA (0.827) in comparison with the rest of the world sample (0.431). Within the south-central American clade (3-2), four haplotypes of R. solani AG-1 IA from Mato Grosso, one from Tocantins, one from Maranhão, and one from Cuba occupied the tips of the network, indicating recent origin. The putative ancestral haplotypes had probably originated either from Mato Grosso or Maranhão States. While 16 distinct haplotypes were found in a sample of 32 soybean isolates of the pathogen, the entire rice sample (n=20) was represented by a single haplotype (haplotype 5), with a worldwide distribution. The results from nested-cladistic analysis indicated restricted gene flow with isolation by distance (or restricted dispersal by distance in nonsexual species) for the south-central American clade (3-2), mainly composed by soybean haplotypes. MenosRhizoctonia solani AG-1 IA causes leaf blight on soybean and rice. Despite the fact that R. solani AG-1 IA is a major pathogen affecting soybean and rice in Brazil and elsewhere in the world, little information is available on its genetic diversity and evolution. This study was an attempt to reveal the origin, and the patterns of movement and amplification of epidemiologically significant genotypes of R. solani AG-1 IA from soybean and rice in Brazil. For inferring intraspecific evolution of R. solani AG-1 IA sampled from soybean and rice, networks of ITS-5.8S rDNA sequencing haplotypes were built using the statistical parsimony algorithm from Clement et al. (2000) Molecular Ecology 9: 1657?1660. Higher haplotype diversity (Nei M 1987, Molecular Evolutionary Genetics Columbia University Press, New york: 512p.) was observed for the Brazilian soybean sample of R. solani AG-1 IA (0.827) in comparison with the rest of the world sample (0.431). Within the south-central American clade (3-2), four haplotypes of R. solani AG-1 IA from Mato Grosso, one from Tocantins, one from Maranhão, and one from Cuba occupied the tips of the network, indicating recent origin. The putative ancestral haplotypes had probably originated either from Mato Grosso or Maranhão States. While 16 distinct haplotypes were found in a sample of 32 soybean isolates of the pathogen, the entire rice sample (n=20) was represented by a single haplotype (haplotype 5), with a worldwide distribution. The results from n... Mostrar Tudo |
|
Thesagro: |
Arroz; Fungo; Soja. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02387naa a2200217 a 4500
001 1470001
005 2017-07-31
008 2005 bl --- 0-- u #d
100 1 $aCIAMPI, M. B.
245 $aIntraspecific evolution of Rhizoctonia solani AG-1 IA associated with soybean and rice in Brazil based on polymorphisms at the ITS-5.8S rDNA operon.
260 $c2005
520 $aRhizoctonia solani AG-1 IA causes leaf blight on soybean and rice. Despite the fact that R. solani AG-1 IA is a major pathogen affecting soybean and rice in Brazil and elsewhere in the world, little information is available on its genetic diversity and evolution. This study was an attempt to reveal the origin, and the patterns of movement and amplification of epidemiologically significant genotypes of R. solani AG-1 IA from soybean and rice in Brazil. For inferring intraspecific evolution of R. solani AG-1 IA sampled from soybean and rice, networks of ITS-5.8S rDNA sequencing haplotypes were built using the statistical parsimony algorithm from Clement et al. (2000) Molecular Ecology 9: 1657?1660. Higher haplotype diversity (Nei M 1987, Molecular Evolutionary Genetics Columbia University Press, New york: 512p.) was observed for the Brazilian soybean sample of R. solani AG-1 IA (0.827) in comparison with the rest of the world sample (0.431). Within the south-central American clade (3-2), four haplotypes of R. solani AG-1 IA from Mato Grosso, one from Tocantins, one from Maranhão, and one from Cuba occupied the tips of the network, indicating recent origin. The putative ancestral haplotypes had probably originated either from Mato Grosso or Maranhão States. While 16 distinct haplotypes were found in a sample of 32 soybean isolates of the pathogen, the entire rice sample (n=20) was represented by a single haplotype (haplotype 5), with a worldwide distribution. The results from nested-cladistic analysis indicated restricted gene flow with isolation by distance (or restricted dispersal by distance in nonsexual species) for the south-central American clade (3-2), mainly composed by soybean haplotypes.
650 $aArroz
650 $aFungo
650 $aSoja
700 1 $aKURAMAE, E. E.
700 1 $aFENILLE, R. C.
700 1 $aMEYER, M. C.
700 1 $aSOUZA, N. L.
700 1 $aCERESINI, P. C.
773 $tEuropean Journal of Plant Pathology$gv. 113, n. 2, p. 183-196, Oct. 2005.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Soja (CNPSO) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
