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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. |
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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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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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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
02/03/2021 |
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Data da última atualização: |
06/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
GUIMARÃES-CESTARO, L.; MARTINS, M. F.; LUÍS CARLOS MARTÍNEZ; MARIA LUISA TELES MARQUES FLORÊNCIO ALVES; KARINA ROSA GUIDUGLI-LAZZARINI; ROBERTA CORNÉLIO FERREIRA NOCELLI; MALASPINA, O.; SERRÃO, J. E.; TEIXEIRA, É. W. |
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Afiliação: |
Lubiane Guimarães-Cestaro, UFV; MARTA FONSECA MARTINS, CNPGL; Luís Carlos Martínez, UFV; Maria Luisa Teles Marques Florêncio Alves, APTA - SP; Karina Rosa Guidugli-Lazzarini, USP; Roberta Cornélio Ferreira Nocelli, UFSCAR; Osmar Malaspina, UNESP; José Eduardo Serrão, UFV; Érica Weinstein Teixeira. |
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Título: |
Occurrence of virus, microsporidia, and pesticide residues in three species of stingless bees (Apidae: Meliponini) in the field. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
NATURWISSENSCHAFTEN - The Science of Nature, v. 107, n. 16, 2020. |
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Páginas: |
14 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract Bees are important pollinators whose population has declined due to several factors, including infections by parasites and pathogens. Resource sharing may play a role in the dispersal dynamics of pathogens among bees. This study evaluated the occurrence of viruses (DWV, BQCV, ABPV, IAPV, KBV, and CBPV) and microsporidia (Nosema ceranae and Nosema apis) that infect Apis mellifera, as well as pesticide residues in the stingless bees Nannotrigona testaceicornis, Tetragonisca angustula, and Tetragona elongata sharing the same foraging area with A. mellifera. Stingless bees were obtained from 10 nests (two of N. testaceicornis, five of T. angustula, and three of T. elongata) which were kept in the field for 1 year and analyzed for the occurrence of pathogens. Spores of N. ceranae were detected in stingless bees but were not found in their midgut, which indicates that these bees are not affected, but may be vectors of the microsporidium. Viruses were found in 23.4% of stingless bees samples. APBV was the most prevalent virus (10.8%) followed by DWV and BQCV (both in 5.1% of samples). We detected glyphosate and its metabolites in small amounts in all samples. The highest occurrence of N. ceranae spores and viruses was found in autumn-winter and may be related to both the higher frequency of bee defecation into the colony and the low food resources available in the field, which increases the sharing of plant species among the stingless bees and honey bees. This study shows the simultaneous occurrence of viruses and spores of the microsporidium N. ceranae in asymptomatic stingless bees, which suggest that these bees may be vectors of pathogens. MenosAbstract Bees are important pollinators whose population has declined due to several factors, including infections by parasites and pathogens. Resource sharing may play a role in the dispersal dynamics of pathogens among bees. This study evaluated the occurrence of viruses (DWV, BQCV, ABPV, IAPV, KBV, and CBPV) and microsporidia (Nosema ceranae and Nosema apis) that infect Apis mellifera, as well as pesticide residues in the stingless bees Nannotrigona testaceicornis, Tetragonisca angustula, and Tetragona elongata sharing the same foraging area with A. mellifera. Stingless bees were obtained from 10 nests (two of N. testaceicornis, five of T. angustula, and three of T. elongata) which were kept in the field for 1 year and analyzed for the occurrence of pathogens. Spores of N. ceranae were detected in stingless bees but were not found in their midgut, which indicates that these bees are not affected, but may be vectors of the microsporidium. Viruses were found in 23.4% of stingless bees samples. APBV was the most prevalent virus (10.8%) followed by DWV and BQCV (both in 5.1% of samples). We detected glyphosate and its metabolites in small amounts in all samples. The highest occurrence of N. ceranae spores and viruses was found in autumn-winter and may be related to both the higher frequency of bee defecation into the colony and the low food resources available in the field, which increases the sharing of plant species among the stingless bees and honey bees. This study shows ... Mostrar Tudo |
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Palavras-Chave: |
Nannotrigona testaceicornis; Tetragona elongata. |
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Thesagro: |
Tetragonisca Angustula. |
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Thesaurus NAL: |
Pathogens. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02608naa a2200277 a 4500
001 2130435
005 2024-02-06
008 2020 bl uuuu u00u1 u #d
100 1 $aGUIMARÃES-CESTARO, L.
245 $aOccurrence of virus, microsporidia, and pesticide residues in three species of stingless bees (Apidae$bMeliponini) in the field.$h[electronic resource]
260 $c2020
300 $a14 p.
520 $aAbstract Bees are important pollinators whose population has declined due to several factors, including infections by parasites and pathogens. Resource sharing may play a role in the dispersal dynamics of pathogens among bees. This study evaluated the occurrence of viruses (DWV, BQCV, ABPV, IAPV, KBV, and CBPV) and microsporidia (Nosema ceranae and Nosema apis) that infect Apis mellifera, as well as pesticide residues in the stingless bees Nannotrigona testaceicornis, Tetragonisca angustula, and Tetragona elongata sharing the same foraging area with A. mellifera. Stingless bees were obtained from 10 nests (two of N. testaceicornis, five of T. angustula, and three of T. elongata) which were kept in the field for 1 year and analyzed for the occurrence of pathogens. Spores of N. ceranae were detected in stingless bees but were not found in their midgut, which indicates that these bees are not affected, but may be vectors of the microsporidium. Viruses were found in 23.4% of stingless bees samples. APBV was the most prevalent virus (10.8%) followed by DWV and BQCV (both in 5.1% of samples). We detected glyphosate and its metabolites in small amounts in all samples. The highest occurrence of N. ceranae spores and viruses was found in autumn-winter and may be related to both the higher frequency of bee defecation into the colony and the low food resources available in the field, which increases the sharing of plant species among the stingless bees and honey bees. This study shows the simultaneous occurrence of viruses and spores of the microsporidium N. ceranae in asymptomatic stingless bees, which suggest that these bees may be vectors of pathogens.
650 $aPathogens
650 $aTetragonisca Angustula
653 $aNannotrigona testaceicornis
653 $aTetragona elongata
700 1 $aMARTINS, M. F.
700 1 $aLUÍS CARLOS MARTÍNEZ
700 1 $aMARIA LUISA TELES MARQUES FLORÊNCIO ALVES
700 1 $aKARINA ROSA GUIDUGLI-LAZZARINI
700 1 $aROBERTA CORNÉLIO FERREIRA NOCELLI
700 1 $aMALASPINA, O.
700 1 $aSERRÃO, J. E.
700 1 $aTEIXEIRA, É. W.
773 $tNATURWISSENSCHAFTEN - The Science of Nature$gv. 107, n. 16, 2020.
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