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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
15/03/2011 |
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Data da última atualização: |
15/03/2011 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
OLIVEIRA, M. G. de C.; OLIVEIRA, L. F. C. de. |
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Afiliação: |
MARCIA GONZAGA DE CASTRO OLIVEIRA, CNPAF; LUCIENE FROES CAMARANO DE OLIVEIRA, CNPAF. |
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Título: |
A utilização de Unidades Demonstrativas para a transferência de tecnologia. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
ClicNews 2010. Disponível em: . Acesso em: 22 nov. 2010. |
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Idioma: |
Português |
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Conteúdo: |
A demonstração das tecnologias agrícolas é uma das formas de transferência adotadas pela Empresa Brasileira de Pesquisa Agropecuária ? Embrapa. Essa demonstração é feita para aproximar o agricultor dos benefícios gerados pela pesquisa. Nesse contexto, se insere o conceito de Unidade Demonstrativa (UD), mas o que vem a ser uma UD? |
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Thesagro: |
Transferência de tecnologia. |
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Categoria do assunto: |
B Sociologia Rural |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/29508/1/adocao.pdf
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Marc: |
LEADER 00863nam a2200133 a 4500
001 1880808
005 2011-03-15
008 2010 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, M. G. de C.
245 $aA utilização de Unidades Demonstrativas para a transferência de tecnologia.$h[electronic resource]
260 $aClicNews 2010. Disponível em: <http://www.clicnews.com.br/agropecuaria/view.htm?id=117997>. Acesso em: 22 nov. 2010.$c2010
520 $aA demonstração das tecnologias agrícolas é uma das formas de transferência adotadas pela Empresa Brasileira de Pesquisa Agropecuária ? Embrapa. Essa demonstração é feita para aproximar o agricultor dos benefícios gerados pela pesquisa. Nesse contexto, se insere o conceito de Unidade Demonstrativa (UD), mas o que vem a ser uma UD?
650 $aTransferência de tecnologia
700 1 $aOLIVEIRA, L. F. C. de
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
19/01/2024 |
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Data da última atualização: |
26/03/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
BRITO, S. C.; PEREIRA, V. A. C.; PRADO, A. C. F.; TOBIAS, T. J.; PARIS, E. C.; FERREIRA, M. D. |
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Afiliação: |
Sao Paulo State University “Julio de Mesquita Filho”; Federal University of Sao Carlos; Sao Paulo State University “Julio de Mesquita Filho”; University of Sao Paulo; ELAINE CRISTINA PARIS, CNPDIA; MARCOS DAVID FERREIRA, CNPDIA. |
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Título: |
Antimicrobial potential of linear low-density polyethylene food packaging with Ag nanoparticles in different carriers (Silica and Hydroxyapatite). |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Journal of Microbiological Methods, v. 217–218. 106873, 2024. |
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ISSN: |
0167-7012 |
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DOI: |
https://doi.org/10.1016/j.mimet.2023.106873 |
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Idioma: |
Inglês |
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Conteúdo: |
Silver nanoparticles incorporation into polymeric packaging aims to prevent microbiological contamination in food products, thus ensuring superior food safety and preservation. In this context, this study aimed to verify the antimicrobial efficacy of linear low-density polyethylene (LLDPE) films incorporated with silver nanoparticles (AgNPs) dispersed in silica (SiO2) and hydroxyapatite (HAP) carriers at different concentrations. AgNPs + carriers polymer films were characterized at 0.2, 0.4, and 0.6% concentrations using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission gun-scanning electron microscope (FEG-SEM), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC), and migration in acidic and nonacidic simulants. Antimicrobial action was investigated on Gram-positive Staphylococcus aureus, Gram-negative Escherichia coli, and the Penicillium expansum and Fusarium solani fungi with antimicrobial activity by direct contact test and bacterial imaging by scanning electron microscopy. AgNPs addition to the LLDPE matrix did not interfere with the films’ chemical and thermal properties and presented no significant migration to the external medium. For antimicrobial action, silver nanoparticles showed, in most concentrations, an inhibition percentage higher than 90% on all microorganisms studied, regardless of the carrier. However, a greater inhibitory action on S. aureus and between carriers was found, making hydroxyapatite more effective. The results indicated that nanostructured films with AgNPs + hydroxyapatite showed more promising antimicrobial action on microorganisms than AgNPs + silica, making hydroxyapatite with silver nanoparticle potentially useful in food packaging, improving safety and maintaining quality. MenosSilver nanoparticles incorporation into polymeric packaging aims to prevent microbiological contamination in food products, thus ensuring superior food safety and preservation. In this context, this study aimed to verify the antimicrobial efficacy of linear low-density polyethylene (LLDPE) films incorporated with silver nanoparticles (AgNPs) dispersed in silica (SiO2) and hydroxyapatite (HAP) carriers at different concentrations. AgNPs + carriers polymer films were characterized at 0.2, 0.4, and 0.6% concentrations using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission gun-scanning electron microscope (FEG-SEM), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC), and migration in acidic and nonacidic simulants. Antimicrobial action was investigated on Gram-positive Staphylococcus aureus, Gram-negative Escherichia coli, and the Penicillium expansum and Fusarium solani fungi with antimicrobial activity by direct contact test and bacterial imaging by scanning electron microscopy. AgNPs addition to the LLDPE matrix did not interfere with the films’ chemical and thermal properties and presented no significant migration to the external medium. For antimicrobial action, silver nanoparticles showed, in most concentrations, an inhibition percentage higher than 90% on all microorganisms studied, regardless of the carrier. However, a greater inhibitory action on S. aureus and between carriers was found, making hydroxyapatite... Mostrar Tudo |
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Palavras-Chave: |
Active food packaging; Inorganic carrier; Polymer films; Silver nanoparticles. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02644naa a2200253 a 4500
001 2161069
005 2024-03-26
008 2024 bl uuuu u00u1 u #d
022 $a0167-7012
024 7 $ahttps://doi.org/10.1016/j.mimet.2023.106873$2DOI
100 1 $aBRITO, S. C.
245 $aAntimicrobial potential of linear low-density polyethylene food packaging with Ag nanoparticles in different carriers (Silica and Hydroxyapatite).$h[electronic resource]
260 $c2024
520 $aSilver nanoparticles incorporation into polymeric packaging aims to prevent microbiological contamination in food products, thus ensuring superior food safety and preservation. In this context, this study aimed to verify the antimicrobial efficacy of linear low-density polyethylene (LLDPE) films incorporated with silver nanoparticles (AgNPs) dispersed in silica (SiO2) and hydroxyapatite (HAP) carriers at different concentrations. AgNPs + carriers polymer films were characterized at 0.2, 0.4, and 0.6% concentrations using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission gun-scanning electron microscope (FEG-SEM), thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC), and migration in acidic and nonacidic simulants. Antimicrobial action was investigated on Gram-positive Staphylococcus aureus, Gram-negative Escherichia coli, and the Penicillium expansum and Fusarium solani fungi with antimicrobial activity by direct contact test and bacterial imaging by scanning electron microscopy. AgNPs addition to the LLDPE matrix did not interfere with the films’ chemical and thermal properties and presented no significant migration to the external medium. For antimicrobial action, silver nanoparticles showed, in most concentrations, an inhibition percentage higher than 90% on all microorganisms studied, regardless of the carrier. However, a greater inhibitory action on S. aureus and between carriers was found, making hydroxyapatite more effective. The results indicated that nanostructured films with AgNPs + hydroxyapatite showed more promising antimicrobial action on microorganisms than AgNPs + silica, making hydroxyapatite with silver nanoparticle potentially useful in food packaging, improving safety and maintaining quality.
653 $aActive food packaging
653 $aInorganic carrier
653 $aPolymer films
653 $aSilver nanoparticles
700 1 $aPEREIRA, V. A. C.
700 1 $aPRADO, A. C. F.
700 1 $aTOBIAS, T. J.
700 1 $aPARIS, E. C.
700 1 $aFERREIRA, M. D.
773 $tJournal of Microbiological Methods$gv. 217–218. 106873, 2024.
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