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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: |
09/01/2019 |
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Data da última atualização: |
14/01/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
HORNUNG, P. S.; BARBI, R. C. T.; TEIXEIRA, G. L.; ÁVILA, S.; SILVA, F. L. de A. da; LAZZAROTTO, M.; SILVEIRA, J. L. M.; BETA, T.; RIBANI, R. H. |
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Afiliação: |
Polyanna Silveira Hornung, UFPR; Rafaela Cristina Turola Barbi, UFPR; Gerson Lopes Teixeira, UFPR; Suelen Ávila, UFPR; Fernando Lucas de Abreu da Silva, UFPR; MARCELO LAZZAROTTO, CNPF; Joana Léa Meira Silveira, UFPR; Trust Beta, University of Manitoba; Rosemary Hoffmann Ribani, UFPR. |
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Título: |
Brazilian Amazon white yam (Dioscorea sp.) starch: impact on functional properties due to chemical and physical modifications processes. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Journal of Thermal Analysis and Calorimetry, v. 134, n. 3, p. 2075-2088, Dec. 2018. |
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DOI: |
10.1007/s10973-018-7353-1 |
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Idioma: |
Inglês |
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Conteúdo: |
The functional properties of starch granules define its application in food and non-food industries. Thus, in this study we investigated thermal, rheological, structural and colour properties of the native and modified starch of the Amazon Dioscorea sp. (white yam) tuber. The Dioscorea sp. native starch was modified by applying single, simultaneous and combined modification agents (sodium hypochlorite, ultraviolet (UV) radiation and microwave irradiation). The thermogravimetric curves showed three main mass losses and increased thermal stability for the triple (NaClO + UV + microwaves) modified sample. The UV-irradiated samples required less energy (enthalpy) to gelatinize as registered by the differential scanning calorimetry. Performing modification using microwaves resulted in starches of highly viscous pastes as recorded by the rapid visco analyser. All the starch gel samples presented thixotropic behaviour, in which pseudoplastic characteristics were adequately described by Ostwald?de Waele and Herschel?Bulkley models. Rheological evaluation also revealed that one-step modified starches could produce stronger gels than the native one. Lower degree of relative crystallinity and a wide range of granule sizes were demonstrated by X-ray diffraction patterns and scanning electron microscopy. The colour measurement revealed the brightening and browning action of NaClO and microwaves, respectively. |
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Palavras-Chave: |
DSC; Microwave irradiation; Radiação ultravioleta; SEM; Starch oxidation; TG/DTG; Tuber starch. |
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Thesagro: |
Amido; Inhame; Oxidação; Tubérculo. |
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Thesaurus Nal: |
Dioscorea; Ultraviolet radiation. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02573naa a2200385 a 4500
001 2103379
005 2019-01-14
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1007/s10973-018-7353-1$2DOI
100 1 $aHORNUNG, P. S.
245 $aBrazilian Amazon white yam (Dioscorea sp.) starch$bimpact on functional properties due to chemical and physical modifications processes.$h[electronic resource]
260 $c2018
520 $aThe functional properties of starch granules define its application in food and non-food industries. Thus, in this study we investigated thermal, rheological, structural and colour properties of the native and modified starch of the Amazon Dioscorea sp. (white yam) tuber. The Dioscorea sp. native starch was modified by applying single, simultaneous and combined modification agents (sodium hypochlorite, ultraviolet (UV) radiation and microwave irradiation). The thermogravimetric curves showed three main mass losses and increased thermal stability for the triple (NaClO + UV + microwaves) modified sample. The UV-irradiated samples required less energy (enthalpy) to gelatinize as registered by the differential scanning calorimetry. Performing modification using microwaves resulted in starches of highly viscous pastes as recorded by the rapid visco analyser. All the starch gel samples presented thixotropic behaviour, in which pseudoplastic characteristics were adequately described by Ostwald?de Waele and Herschel?Bulkley models. Rheological evaluation also revealed that one-step modified starches could produce stronger gels than the native one. Lower degree of relative crystallinity and a wide range of granule sizes were demonstrated by X-ray diffraction patterns and scanning electron microscopy. The colour measurement revealed the brightening and browning action of NaClO and microwaves, respectively.
650 $aDioscorea
650 $aUltraviolet radiation
650 $aAmido
650 $aInhame
650 $aOxidação
650 $aTubérculo
653 $aDSC
653 $aMicrowave irradiation
653 $aRadiação ultravioleta
653 $aSEM
653 $aStarch oxidation
653 $aTG/DTG
653 $aTuber starch
700 1 $aBARBI, R. C. T.
700 1 $aTEIXEIRA, G. L.
700 1 $aÁVILA, S.
700 1 $aSILVA, F. L. de A. da
700 1 $aLAZZAROTTO, M.
700 1 $aSILVEIRA, J. L. M.
700 1 $aBETA, T.
700 1 $aRIBANI, R. H.
773 $tJournal of Thermal Analysis and Calorimetry$gv. 134, n. 3, p. 2075-2088, Dec. 2018.
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Registro original: |
Embrapa Florestas (CNPF) |
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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: |
11/01/2024 |
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Data da última atualização: |
11/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALVARENGA, A. D.; LIMA, B. de A.; TEODORO, K. B. R.; COSTA, V. P. V. da; AGUIAR, M. L.; CORREA, D. S. |
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Afiliação: |
Nanotechnology National Laboratory for Agriculture (LNNA); Federal University of São Carlos; Nanotechnology National Laboratory for Agriculture (LNNA); Federal University of Sao Carlos (UFSCar); Federal University of Sao Carlos (UFSCar); DANIEL SOUZA CORREA, CNPDIA. |
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Título: |
Effect of static electricity and thickness of solution blow spun polyamide 6/ AgNP nanofibrous membrane on nanoparticle filtration and microbiological activity. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Applied Surface Science, v. 652, 159215, 2024. |
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Páginas: |
13 p. |
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ISSN: |
0169-4332 |
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DOI: |
https://doi.org/10.1016/j.apsusc.2023.159215 |
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Idioma: |
Inglês |
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Conteúdo: |
The efficient filtration of particulate matter smaller than 0.3 µm is crucial for preventing microbial and viral infections. Nanofiber membranes (NFMs) produced by solution blow spinning (SBS) modified with antimicrobial nanoparticles have emerged as a promising technology for filtration technology. In this context, here we developed novel NFMs produced by SBS using Polyamide 6 (PA6) which was surface functionalized with different types of silver nanoparticles (AgNPs) using a simple immersion procedure. The NFMs thickness was customized to evaluate their performance towards the filtration of NP (nanoparticle) from 30 to 300 nm. The incorporation of AgNPs onto the NFMs was also investigated to test their bactericidal activity against E. coli and S. aureus. The NFMs were physically and chemically characterized using distinct techniques. The filtration efficiency of 30–300 nm NP reached around 93.5 %, where the NFMs thickness played a key role in the filtration efficiency and pressure drop. Furthermore, the presence of static electricity in the NFM inherent to the SBS process also contributed to the greater filtration efficiency of smaller particles. Our results demonstrated that NFMs can be produced through SBS in an easy and scalable way, leading to highly efficient filtration systems, with implications for diverse fields such air purification systems and protective clothing. |
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Palavras-Chave: |
Ag nanoparticles; Bactericide; Solution blow spinning. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02230naa a2200253 a 4500
001 2160738
005 2024-01-11
008 2024 bl uuuu u00u1 u #d
022 $a0169-4332
024 7 $ahttps://doi.org/10.1016/j.apsusc.2023.159215$2DOI
100 1 $aALVARENGA, A. D.
245 $aEffect of static electricity and thickness of solution blow spun polyamide 6/ AgNP nanofibrous membrane on nanoparticle filtration and microbiological activity.$h[electronic resource]
260 $c2024
300 $a13 p.
520 $aThe efficient filtration of particulate matter smaller than 0.3 µm is crucial for preventing microbial and viral infections. Nanofiber membranes (NFMs) produced by solution blow spinning (SBS) modified with antimicrobial nanoparticles have emerged as a promising technology for filtration technology. In this context, here we developed novel NFMs produced by SBS using Polyamide 6 (PA6) which was surface functionalized with different types of silver nanoparticles (AgNPs) using a simple immersion procedure. The NFMs thickness was customized to evaluate their performance towards the filtration of NP (nanoparticle) from 30 to 300 nm. The incorporation of AgNPs onto the NFMs was also investigated to test their bactericidal activity against E. coli and S. aureus. The NFMs were physically and chemically characterized using distinct techniques. The filtration efficiency of 30–300 nm NP reached around 93.5 %, where the NFMs thickness played a key role in the filtration efficiency and pressure drop. Furthermore, the presence of static electricity in the NFM inherent to the SBS process also contributed to the greater filtration efficiency of smaller particles. Our results demonstrated that NFMs can be produced through SBS in an easy and scalable way, leading to highly efficient filtration systems, with implications for diverse fields such air purification systems and protective clothing.
653 $aAg nanoparticles
653 $aBactericide
653 $aSolution blow spinning
700 1 $aLIMA, B. de A.
700 1 $aTEODORO, K. B. R.
700 1 $aCOSTA, V. P. V. da
700 1 $aAGUIAR, M. L.
700 1 $aCORREA, D. S.
773 $tApplied Surface Science$gv. 652, 159215, 2024.
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