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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
11/02/2021 |
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Data da última atualização: |
12/02/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, C. B. da; DUARTE, D. S.; SOUZA, A. V. de; ASSIS, O. B. G. de; BRITTO, D. de. |
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Afiliação: |
Cristina Barbosa da Silva; Dirliane Santos Duarte; ANA VALERIA VIEIRA DE SOUZA, CPATSA; ODILIO BENEDITO GARRIDO DE ASSIS, CNPDIA; DOUGLAS DE BRITTO, CPATSA. |
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Título: |
Synthesis of chitosan polysaccharide nanoparticles for skin grape extract stabilization. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Brazilian Journal of Development, v. 6, n. 4, p. 17913-17930, 2020. |
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Idioma: |
Inglês |
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Conteúdo: |
Nanoparticles obtained by chitosan and tripolyphosphatehas been largely studied due to its entrapment characteristics. However, several parameters can influence the synthesis and encapsulationprocesses. In this way, this work proposed to study the nanoparticle formation with chitosan and tripolyphosphate in function of the acid concentration (1.0; 0.5 and0.1%) and the kind of the acid (hydrochloric and acetic). Conductometric and Potentiometric techniques showed that the reactional system was very dependent on the pH variation. The best condition, both for HCl and acetic acid, was achieved for systems with lower pH variation. For such systems, Dynamic Light Scattering technique showed formation of nanoparticle with the lowest size (135±7 nm) and higher stability (zeta potential near 30 mV). Also, by Scanning Electronic Microscopy, such systems exhibited good morphological aspect, with nanoparticles having spherical shape and lower level of agglomeration. The cryoprotection with sucrose solution before freeze-drying was fundamental to get samples with the improved re-suspension ability and preserved nanoparticle character. By UV-visible spectrophotometry, both HCl and acetic acid-based systems resulted in nanoparticles with good polyphenols encapsulation efficiency (~70%). The release profile was pH-dependent. In this way, the chitosan and tripolyphosphate ionic gelification need an accurate pH control both in the synthesis and in the encapsulation-release processes. |
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Palavras-Chave: |
Casca de uva; Encapsulamento; Hidrogel; Nanopartículas; Polieletrólito; Polifenóis; Quitosana; Reticulação iônica. |
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Thesagro: |
Uva. |
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Thesaurus Nal: |
Grapes. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/221168/1/Synthesis-of-chitosan-polysaccharide-nanoparticle-2020.pdf
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Marc: |
LEADER 02306naa a2200289 a 4500
001 2130000
005 2021-02-12
008 2020 bl uuuu u00u1 u #d
100 1 $aSILVA, C. B. da
245 $aSynthesis of chitosan polysaccharide nanoparticles for skin grape extract stabilization.$h[electronic resource]
260 $c2020
520 $aNanoparticles obtained by chitosan and tripolyphosphatehas been largely studied due to its entrapment characteristics. However, several parameters can influence the synthesis and encapsulationprocesses. In this way, this work proposed to study the nanoparticle formation with chitosan and tripolyphosphate in function of the acid concentration (1.0; 0.5 and0.1%) and the kind of the acid (hydrochloric and acetic). Conductometric and Potentiometric techniques showed that the reactional system was very dependent on the pH variation. The best condition, both for HCl and acetic acid, was achieved for systems with lower pH variation. For such systems, Dynamic Light Scattering technique showed formation of nanoparticle with the lowest size (135±7 nm) and higher stability (zeta potential near 30 mV). Also, by Scanning Electronic Microscopy, such systems exhibited good morphological aspect, with nanoparticles having spherical shape and lower level of agglomeration. The cryoprotection with sucrose solution before freeze-drying was fundamental to get samples with the improved re-suspension ability and preserved nanoparticle character. By UV-visible spectrophotometry, both HCl and acetic acid-based systems resulted in nanoparticles with good polyphenols encapsulation efficiency (~70%). The release profile was pH-dependent. In this way, the chitosan and tripolyphosphate ionic gelification need an accurate pH control both in the synthesis and in the encapsulation-release processes.
650 $aGrapes
650 $aUva
653 $aCasca de uva
653 $aEncapsulamento
653 $aHidrogel
653 $aNanopartículas
653 $aPolieletrólito
653 $aPolifenóis
653 $aQuitosana
653 $aReticulação iônica
700 1 $aDUARTE, D. S.
700 1 $aSOUZA, A. V. de
700 1 $aASSIS, O. B. G. de
700 1 $aBRITTO, D. de
773 $tBrazilian Journal of Development$gv. 6, n. 4, p. 17913-17930, 2020.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
03/03/2016 |
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Data da última atualização: |
05/04/2024 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
TOLEDO, A. M. O.; AUAD, A. M.; RESENDE, T. T. de; FONSECA, M. das G.; MACHADO, J. C.; LEDO, F. J. da S.; CLAUDINO, S. da S. |
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Afiliação: |
ANTÔNIO M. O. TOLEDO; ALEXANDER MACHADO AUAD, CNPGL; TIAGO TEIXEIRA DE RESENDE, CNPGL; MARCY DAS G. FONSECA; JUAREZ CAMPOLINA MACHADO, CNPGL; FRANCISCO JOSE DA SILVA LEDO, CNPGL; SILOÉ DA S. CLAUDINO. |
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Título: |
Seleção de híbridos interespecíficos hexaploides e de genótipos de Capim-elefante quanto à resistência à Mahanarva spectabilis (Distant, 1909) (Hemiptera: cercopidae). |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: SEMANA DE BIOLOGIA, 38., 2015, Juiz de Fora. Resumos... Juiz de Fora: Universidade Federal de Juiz de Fora, 2015. |
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Páginas: |
4 p. |
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Idioma: |
Português |
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Palavras-Chave: |
Cigarrinhas-das-pastagens; Forrageira; Grau de resistência. |
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Thesagro: |
Pennisetum Purpureum. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1039556/1/Selecao-de-hibridos-interespecificos-hexaploides.pdf
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Marc: |
LEADER 00864nam a2200229 a 4500
001 2039556
005 2024-04-05
008 2015 bl uuuu u00u1 u #d
100 1 $aTOLEDO, A. M. O.
245 $aSeleção de híbridos interespecíficos hexaploides e de genótipos de Capim-elefante quanto à resistência à Mahanarva spectabilis (Distant, 1909) (Hemiptera$bcercopidae).$h[electronic resource]
260 $aIn: SEMANA DE BIOLOGIA, 38., 2015, Juiz de Fora. Resumos... Juiz de Fora: Universidade Federal de Juiz de Fora$c2015
300 $a4 p.
650 $aPennisetum Purpureum
653 $aCigarrinhas-das-pastagens
653 $aForrageira
653 $aGrau de resistência
700 1 $aAUAD, A. M.
700 1 $aRESENDE, T. T. de
700 1 $aFONSECA, M. das G.
700 1 $aMACHADO, J. C.
700 1 $aLEDO, F. J. da S.
700 1 $aCLAUDINO, S. da S.
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Embrapa Gado de Leite (CNPGL) |
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