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Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
27/06/1995 |
Data da última atualização: |
27/06/1995 |
Autoria: |
CRAM, W. J. |
Título: |
A common feature of the uptake of solutes by root parenchyma cells. |
Ano de publicação: |
1980 |
Fonte/Imprenta: |
Aust. J. Plant Physiol., v. 7, n. 1, p. 41-49, 1980. |
Idioma: |
Português |
Categoria do assunto: |
-- |
Marc: |
LEADER 00324naa a2200109 a 4500 001 1605437 005 1995-06-27 008 1980 bl uuuu u00u1 u #d 100 1 $aCRAM, W. J. 245 $aA common feature of the uptake of solutes by root parenchyma cells. 260 $c1980 773 $tAust. J. Plant Physiol.$gv. 7, n. 1, p. 41-49, 1980.
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Embrapa Agrobiologia (CNPAB) |
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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
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
19/01/2024 |
Data da última atualização: |
26/03/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
BRITO, S. C.; PEREIRA, V. A. C.; PRADO, A. C. F.; TOBIAS, T. J.; PARIS, E. C.; FERREIRA, M. D. |
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. |
Título: |
Antimicrobial potential of linear low-density polyethylene food packaging with Ag nanoparticles in different carriers (Silica and Hydroxyapatite). |
Ano de publicação: |
2024 |
Fonte/Imprenta: |
Journal of Microbiological Methods, v. 217–218. 106873, 2024. |
ISSN: |
0167-7012 |
DOI: |
https://doi.org/10.1016/j.mimet.2023.106873 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Active food packaging; Inorganic carrier; Polymer films; Silver nanoparticles. |
Categoria do assunto: |
-- |
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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