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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
14/06/2021 |
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Data da última atualização: |
21/06/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALIABADI, M.; CHEE, B. S.; MATOS, M.; CORTESE, Y. J.; NUGENT, M. J. D.; LIMA, T. A. M. de; MAGALHAES, W. L. E.; LIMA, G. G. de; FIROUZABADI, M. D. |
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Afiliação: |
MEYSAM ALIABADI, Gorgan University of Agricultural Sciences and Natural Resources; BOR SHIN CHEE, Materials Research Institute, Athlone Institute of Technology; MAILSON MATOS, Doutorando da UFPR; YVONNE J. CORTESE, Materials Research Institute, Athlone Institute of Technology; MICHAEL J. D. NUGENT, Materials Research Institute, Athlone Institute of Technology; TIELIDY A. M. DE LIMA, Materials Research Institute, Athlone Institute of Technology; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; GABRIEL GOETTEN DE LIMA, Materials Research Institute, Athlone Institute of Technology; MOHAMMADREZA DEHGHANI FIROUZABADI, Gorgan University of Agricultural Sciences and Natural Resources. |
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Título: |
Microfibrillated cellulose films containing chitosan and tannic acid for wound healing applications. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Materials Science. Materials in Medicine, v. 32, n. 6, article 67, June 2021. 12 p. |
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DOI: |
https://doi.org/10.1007/s10856-021-06536-4 |
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Idioma: |
Inglês |
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Conteúdo: |
The effectiveness of tannic acid as antimicrobial and wound healing for burns have been shown for a century; however, uncontrolled target dosage may result in undesirable side-effects. Remarkably, tannic acid polyphenols compounds crosslinked with polymeric materials produce a strong composite containing the beneficial properties of this tannin. However, investigation of the crosslink structure and its antibacterial and regenerative properties are still unknown when using nanocellulose by mechanical defibrillation; additionally, due to the potential crosslink structure with chitosan, its structure can be complex. Therefore, this work uses bleach kraft nanocellulose in order to investigate the effect on the physical and regenerative properties when incorporated with chitosan and tannic acid. This film results in increased rigidity with a lamellar structure when incorporated with tannic acid due to its strong hydrogen bonding. The release of tannic acid varied depending on the structure it was synthesised with, whereas with chitosan it presented good release model compared to pure cellulose. In addition, exhibiting similar thermal stability as pure cellulose films with antibacterial properties tested against S. aureus and E. coli with good metabolic cellular viability while also inhibiting NF-?B activity, a characteristic of tannic acid. |
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Palavras-Chave: |
Antibacterial property; Antioxidant; Celulose microfibrilada; Membrane functionalization; Nanocellulose; Nanocelulose; Propriedade antibacterial; Slow-release. |
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Thesagro: |
Antioxidante. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02424naa a2200337 a 4500
001 2132300
005 2021-06-21
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10856-021-06536-4$2DOI
100 1 $aALIABADI, M.
245 $aMicrofibrillated cellulose films containing chitosan and tannic acid for wound healing applications.$h[electronic resource]
260 $c2021
520 $aThe effectiveness of tannic acid as antimicrobial and wound healing for burns have been shown for a century; however, uncontrolled target dosage may result in undesirable side-effects. Remarkably, tannic acid polyphenols compounds crosslinked with polymeric materials produce a strong composite containing the beneficial properties of this tannin. However, investigation of the crosslink structure and its antibacterial and regenerative properties are still unknown when using nanocellulose by mechanical defibrillation; additionally, due to the potential crosslink structure with chitosan, its structure can be complex. Therefore, this work uses bleach kraft nanocellulose in order to investigate the effect on the physical and regenerative properties when incorporated with chitosan and tannic acid. This film results in increased rigidity with a lamellar structure when incorporated with tannic acid due to its strong hydrogen bonding. The release of tannic acid varied depending on the structure it was synthesised with, whereas with chitosan it presented good release model compared to pure cellulose. In addition, exhibiting similar thermal stability as pure cellulose films with antibacterial properties tested against S. aureus and E. coli with good metabolic cellular viability while also inhibiting NF-?B activity, a characteristic of tannic acid.
650 $aAntioxidante
653 $aAntibacterial property
653 $aAntioxidant
653 $aCelulose microfibrilada
653 $aMembrane functionalization
653 $aNanocellulose
653 $aNanocelulose
653 $aPropriedade antibacterial
653 $aSlow-release
700 1 $aCHEE, B. S.
700 1 $aMATOS, M.
700 1 $aCORTESE, Y. J.
700 1 $aNUGENT, M. J. D.
700 1 $aLIMA, T. A. M. de
700 1 $aMAGALHAES, W. L. E.
700 1 $aLIMA, G. G. de
700 1 $aFIROUZABADI, M. D.
773 $tJournal of Materials Science. Materials in Medicine$gv. 32, n. 6, article 67, June 2021. 12 p.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
17/03/2023 |
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Data da última atualização: |
17/03/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
COUTO JUNIOR, A. F.; ENCIMAS, J. I.; CARVALHO JUNIOR, O. A. de; MARTINS, E. de S.; GOMES, R. A. T. |
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Afiliação: |
ANTONIO FELIPE COUTO JÚNIOR, UNIVERSIDADE DE BRASÍLIA; JOSÉ IMAÑA ENCINAS, UNIVERSIDADE DE BRASÍLIA; OSMAR ABÍLIO DE CARVALHO JÚNIOR, UNIVERSIDADE DE BRASÍLIA; EDER DE SOUZA MARTINS, CPAC; ROBERTO ARNALDO TRANCOSO GOMES, UNIVERSIDADE DE BRASÍLIA. |
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Título: |
Mapeamento temporal da cobertura da terra do EcoMuseu do Cerrado, Goiás, através do uso de imagens do sensor MODIS. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 13., 2007, Florianópolis. Anais... Florianópolis: INPE; SELPER, 2007. |
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Páginas: |
p. 3841-3847 |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT - Savannas are the main vegetation type in Central Brazil, covering approximately 23% of the national territory. The development of studies to understand its dynamic and to keep its diversity is fundamental. Moreover, the land cover dynamics in this vegetation type demonstrate an intensification of agropastoral systems, wood extraction and land degradation processes. The peculiar physical conditions and severe historical anthropogenic pressure have caused extensive natural vegetation losses, increasing soil erosion, burned area and biological diversity reduction. Thus, the scope of the paper is to analysis MODIS time series behavior of the savanna. The study area is located in Cerrado Ecomuseum in Central Brazil. The results demonstrated that the savanna presents a typical NDVI series behavior, with higher values in the raining season and lower values in the dry season. |
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Palavras-Chave: |
Sensor MODIS. |
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Thesagro: |
Biodiversidade; Cerrado; Ecossistema; Recurso Hídrico; Sensoriamento Remoto. |
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Thesaurus NAL: |
Land degradation; Savannas. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/247936/1/Mapeamento-temporal-cobertura-2007.pdf
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Marc: |
LEADER 01768nam a2200265 a 4500
001 2152473
005 2023-03-17
008 2007 bl uuuu u00u1 u #d
100 1 $aCOUTO JUNIOR, A. F.
245 $aMapeamento temporal da cobertura da terra do EcoMuseu do Cerrado, Goiás, através do uso de imagens do sensor MODIS.$h[electronic resource]
260 $aIn: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 13., 2007, Florianópolis. Anais... Florianópolis: INPE; SELPER$c2007
300 $ap. 3841-3847
520 $aABSTRACT - Savannas are the main vegetation type in Central Brazil, covering approximately 23% of the national territory. The development of studies to understand its dynamic and to keep its diversity is fundamental. Moreover, the land cover dynamics in this vegetation type demonstrate an intensification of agropastoral systems, wood extraction and land degradation processes. The peculiar physical conditions and severe historical anthropogenic pressure have caused extensive natural vegetation losses, increasing soil erosion, burned area and biological diversity reduction. Thus, the scope of the paper is to analysis MODIS time series behavior of the savanna. The study area is located in Cerrado Ecomuseum in Central Brazil. The results demonstrated that the savanna presents a typical NDVI series behavior, with higher values in the raining season and lower values in the dry season.
650 $aLand degradation
650 $aSavannas
650 $aBiodiversidade
650 $aCerrado
650 $aEcossistema
650 $aRecurso Hídrico
650 $aSensoriamento Remoto
653 $aSensor MODIS
700 1 $aENCIMAS, J. I.
700 1 $aCARVALHO JUNIOR, O. A. de
700 1 $aMARTINS, E. de S.
700 1 $aGOMES, R. A. T.
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