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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
18/05/2023 |
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Data da última atualização: |
14/12/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
RODRIGUES, J. P.; COELHO, C. C. DE S.; HIDALGO CHÁVEZ, D. W.; AMANCIO, D.; SOARES, A. G.; FREITAS-SILVA, O. |
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Afiliação: |
JULIANA PEREIRA RODRIGUES, UNIRIO; CAROLINE CORRÊA DE SOUZA COELHO, UNIRIO; DAVY WILLIAM HIDALGO CHÁVEZ, UFRRJ; DAIANA AMANCIO, UNIRIO; ANTONIO GOMES SOARES, CTAA; OTNIEL FREITAS SILVA, CTAA. |
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Título: |
Development and characterization of biocomposite films based on alginate and chitosan for use as postharvest fruit packaging. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
In: CONFERÊNCIA INTERNACIONAL DE PROTEÍNAS E COLOIDES ALIMENTARES, 9., 2023, Rio de Janeiro. Anais... Campinas, Galoá, 2023. |
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Idioma: |
Inglês |
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Notas: |
Poster 157716.Eixo temático: Colóides para filmes comestíveis. CIPCA. |
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Conteúdo: |
Postharvest diseases caused by fungi are reported as one of the main causes of food loss, mainly in the fruit and vegetable (FV) sector. Antimicrobials, such as zinc oxide nanoparticles (ZnOnano) and sodium benzoate (SB), have shown good results as postharvest technology for the FV sector, increasing the food shelf life and reducing losses. This work aimed to develop and characterize films made from sodium alginate and chitosan composites, incorporated with ZnOnano or SB to be used as postharvest fruit packaging. To develop the composite film-forming solutions of alginate (2% m/v) and chitosan (1% m/v) were prepared and mixed in a 9:1 ratio (alginate/chitosan). The alginate crosslinking process was carried out before mixing by crosslinking the polymer with calcium chloride at two different concentrations (0.375% or 0.5%). ZnOnano < 50 nm (0.5 mg/mL) or SB (30 mg/L) were added to the filmogenic solution, plated into Petri dishes, and dried in air circulation oven at 40°C/16 h. The different films obtained were analyzed for their visual appearance, color, opacity, thickness, mechanical properties, humidity, and solubility in water. The statistical analysis was performed by two-way ANOVA, Tukey, and Scott-Knott with 5% of significance. The studied polymeric composition provided plastic and flexible films, with a homogeneous visual appearance regardless of the crosslinking agent concentration or the addition of different antimicrobials. The films added with ZnOnano presented more cohesive appearance than the other films and all of them presented a yellowish color tone, provided by the higher alginate proportion used in the formulation, where the parameter b*, which measures the variation between shades of blue and yellow, showed positive values between 9.31 ± 0.789 and 11.5 ± 3.37. The films showed high transparency, confirmed by the values of low opacity600 nm, lying between 0.99 ± 0,08 and 2.35 ± 1,03. The crosslinking process and the addition of ZnOnano could change the film's physical properties, leaving them with less thickness, higher rupture tension, lower elongation at break, and higher Young's modulus, when compared to non-crosslinked films and without the addition of antimicrobials. The average moisture content of films with lower crosslinking (18.7 ± 1.241%) was higher when compared to the average of films with higher crosslinking (17.11 ± 0.586%). The films incorporated by different antimicrobial agents also showed significant moisture averages when compared to films without them. The addition of antimicrobial agents probably increased the hygroscopicity of the films, and the cross-linking agent concentration did not influence this variable. All films were highly soluble in water (54.9 ± 3.55 - 80.9 ± 11.4%) after 24h indicating that the crosslinking process and the change in the film's structure with ZnOnano, were not enough to make them less soluble. Despite the structural change that occurred in the films with crosslinking and the addition of ZnOnano, new experiments need to be performed, increasing the concentration of the crosslinking agent to reduce the solubility of the films and enable their use as food packaging. MenosPostharvest diseases caused by fungi are reported as one of the main causes of food loss, mainly in the fruit and vegetable (FV) sector. Antimicrobials, such as zinc oxide nanoparticles (ZnOnano) and sodium benzoate (SB), have shown good results as postharvest technology for the FV sector, increasing the food shelf life and reducing losses. This work aimed to develop and characterize films made from sodium alginate and chitosan composites, incorporated with ZnOnano or SB to be used as postharvest fruit packaging. To develop the composite film-forming solutions of alginate (2% m/v) and chitosan (1% m/v) were prepared and mixed in a 9:1 ratio (alginate/chitosan). The alginate crosslinking process was carried out before mixing by crosslinking the polymer with calcium chloride at two different concentrations (0.375% or 0.5%). ZnOnano < 50 nm (0.5 mg/mL) or SB (30 mg/L) were added to the filmogenic solution, plated into Petri dishes, and dried in air circulation oven at 40°C/16 h. The different films obtained were analyzed for their visual appearance, color, opacity, thickness, mechanical properties, humidity, and solubility in water. The statistical analysis was performed by two-way ANOVA, Tukey, and Scott-Knott with 5% of significance. The studied polymeric composition provided plastic and flexible films, with a homogeneous visual appearance regardless of the crosslinking agent concentration or the addition of different antimicrobials. The films added with ZnOnano presented mor... Mostrar Tudo |
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Palavras-Chave: |
Biocomposite; Postharvest. |
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Thesaurus Nal: |
Nanoparticles. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 04021nam a2200217 a 4500
001 2153819
005 2023-12-14
008 2023 bl uuuu u00u1 u #d
100 1 $aRODRIGUES, J. P.
245 $aDevelopment and characterization of biocomposite films based on alginate and chitosan for use as postharvest fruit packaging.$h[electronic resource]
260 $aIn: CONFERÊNCIA INTERNACIONAL DE PROTEÍNAS E COLOIDES ALIMENTARES, 9., 2023, Rio de Janeiro. Anais... Campinas, Galoá$c2023
500 $aPoster 157716.Eixo temático: Colóides para filmes comestíveis. CIPCA.
520 $aPostharvest diseases caused by fungi are reported as one of the main causes of food loss, mainly in the fruit and vegetable (FV) sector. Antimicrobials, such as zinc oxide nanoparticles (ZnOnano) and sodium benzoate (SB), have shown good results as postharvest technology for the FV sector, increasing the food shelf life and reducing losses. This work aimed to develop and characterize films made from sodium alginate and chitosan composites, incorporated with ZnOnano or SB to be used as postharvest fruit packaging. To develop the composite film-forming solutions of alginate (2% m/v) and chitosan (1% m/v) were prepared and mixed in a 9:1 ratio (alginate/chitosan). The alginate crosslinking process was carried out before mixing by crosslinking the polymer with calcium chloride at two different concentrations (0.375% or 0.5%). ZnOnano < 50 nm (0.5 mg/mL) or SB (30 mg/L) were added to the filmogenic solution, plated into Petri dishes, and dried in air circulation oven at 40°C/16 h. The different films obtained were analyzed for their visual appearance, color, opacity, thickness, mechanical properties, humidity, and solubility in water. The statistical analysis was performed by two-way ANOVA, Tukey, and Scott-Knott with 5% of significance. The studied polymeric composition provided plastic and flexible films, with a homogeneous visual appearance regardless of the crosslinking agent concentration or the addition of different antimicrobials. The films added with ZnOnano presented more cohesive appearance than the other films and all of them presented a yellowish color tone, provided by the higher alginate proportion used in the formulation, where the parameter b*, which measures the variation between shades of blue and yellow, showed positive values between 9.31 ± 0.789 and 11.5 ± 3.37. The films showed high transparency, confirmed by the values of low opacity600 nm, lying between 0.99 ± 0,08 and 2.35 ± 1,03. The crosslinking process and the addition of ZnOnano could change the film's physical properties, leaving them with less thickness, higher rupture tension, lower elongation at break, and higher Young's modulus, when compared to non-crosslinked films and without the addition of antimicrobials. The average moisture content of films with lower crosslinking (18.7 ± 1.241%) was higher when compared to the average of films with higher crosslinking (17.11 ± 0.586%). The films incorporated by different antimicrobial agents also showed significant moisture averages when compared to films without them. The addition of antimicrobial agents probably increased the hygroscopicity of the films, and the cross-linking agent concentration did not influence this variable. All films were highly soluble in water (54.9 ± 3.55 - 80.9 ± 11.4%) after 24h indicating that the crosslinking process and the change in the film's structure with ZnOnano, were not enough to make them less soluble. Despite the structural change that occurred in the films with crosslinking and the addition of ZnOnano, new experiments need to be performed, increasing the concentration of the crosslinking agent to reduce the solubility of the films and enable their use as food packaging.
650 $aNanoparticles
653 $aBiocomposite
653 $aPostharvest
700 1 $aCOELHO, C. C. DE S.
700 1 $aHIDALGO CHÁVEZ, D. W.
700 1 $aAMANCIO, D.
700 1 $aSOARES, A. G.
700 1 $aFREITAS-SILVA, O.
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Embrapa Agroindústria de Alimentos (CTAA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
17/09/1999 |
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Data da última atualização: |
05/07/2006 |
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Autoria: |
ROESSING, A. C. |
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Título: |
Competitividade do setor agroindustrial brasileiro. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE SOJA, 1999, Londrina. Anais... Londrina: Embrapa Soja, 1999. |
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Páginas: |
p.437. |
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Série: |
(Embrapa Soja. Documentos, 124). |
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Idioma: |
Português |
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Conteúdo: |
Os sistemas agroindustriais (SAs) dos paises em desenvolvimento, particularmente do Brasil, devem ser entendidos como um tema vinculado a evolucao geral da economia mundial. O bom entendimento do que esta de passando na agricultura nao pode de fundamentar mais em analises exclusivas das partes, senao tambem da analise mais e mais aprofundada nas relacoes existentes entre cada elo que liga os setores agricolas, industrial e de servicos. O SA brasileiro da soja particulamente importante, pois movimenta anualmente cerca de US$ 49 bilhoes. O objetivo deste trabalho foi, atraves da observacao e analise de dados estatisticos disponiveis, verificar o grau de competitividade do SA brasileiro da soja no contexto mundial. Resultados das analises apontam, no setor produtivo da materia prima, vantagem competitiva em relacao a disponibilidade de terras para expandir a cultura, tradicao nas exportacoes, principalmente de farelo de soja, tamanho do mercado interno e dominio da tecnologia de producao de soja nos tropicos. Quanto a competitividade industrial, as empresas brasileiras do setor comparam-se as melhores do mundo, mesmo porque a tecnologia de extracao de oleos vegetais e farelos proteicos nao sofreu modificacoes de importantes nos ultimos 30 anos. O SA da soja no Brasil possui condicoes semelhantes a outros paises, com destaque para a possibilidade de haver no pais uma abundante oferta de materia prima a medio prazo, desde que sejam resolvidas questoes de infra-estrutura. |
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Palavras-Chave: |
Competitiveness; Competitividade; Industrial agricola; Soybean. |
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Thesagro: |
Soja. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02073naa a2200205 a 4500
001 1460902
005 2006-07-05
008 1999 bl uuuu u00u1 u #d
100 1 $aROESSING, A. C.
245 $aCompetitividade do setor agroindustrial brasileiro.
260 $c1999
300 $ap.437.
490 $a(Embrapa Soja. Documentos, 124).
520 $aOs sistemas agroindustriais (SAs) dos paises em desenvolvimento, particularmente do Brasil, devem ser entendidos como um tema vinculado a evolucao geral da economia mundial. O bom entendimento do que esta de passando na agricultura nao pode de fundamentar mais em analises exclusivas das partes, senao tambem da analise mais e mais aprofundada nas relacoes existentes entre cada elo que liga os setores agricolas, industrial e de servicos. O SA brasileiro da soja particulamente importante, pois movimenta anualmente cerca de US$ 49 bilhoes. O objetivo deste trabalho foi, atraves da observacao e analise de dados estatisticos disponiveis, verificar o grau de competitividade do SA brasileiro da soja no contexto mundial. Resultados das analises apontam, no setor produtivo da materia prima, vantagem competitiva em relacao a disponibilidade de terras para expandir a cultura, tradicao nas exportacoes, principalmente de farelo de soja, tamanho do mercado interno e dominio da tecnologia de producao de soja nos tropicos. Quanto a competitividade industrial, as empresas brasileiras do setor comparam-se as melhores do mundo, mesmo porque a tecnologia de extracao de oleos vegetais e farelos proteicos nao sofreu modificacoes de importantes nos ultimos 30 anos. O SA da soja no Brasil possui condicoes semelhantes a outros paises, com destaque para a possibilidade de haver no pais uma abundante oferta de materia prima a medio prazo, desde que sejam resolvidas questoes de infra-estrutura.
650 $aSoja
653 $aCompetitiveness
653 $aCompetitividade
653 $aIndustrial agricola
653 $aSoybean
773 $tIn: CONGRESSO BRASILEIRO DE SOJA, 1999, Londrina. Anais... Londrina: Embrapa Soja, 1999.
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