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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 Completo
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
23/06/2006 |
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Data da última atualização: |
12/03/2015 |
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Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
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Autoria: |
KUNZ, A.; OLIVEIRA, P. A. V. de; HIGARASHI, M. M.; SANGOI, V. |
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Afiliação: |
AIRTON KUNZ, CNPSA; PAULO ARMANDO VICTORIA DE OLIVEIRA, CNPSA; MARTHA MAYUMI HIGARASHI, CNPSA; VICENTE SANGOI, CNPSA. |
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Título: |
Recomendações para uso de esterqueiras para armazenagem de dejetos de suínos. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Concórdia: Embrapa Suínos e Aves, 2004. |
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Páginas: |
4 p. |
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Série: |
(Embrapa Suínos e Aves. Comunicado Técnico, 361). |
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Idioma: |
Português |
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Palavras-Chave: |
Dejetos; Esterqueiras; Suínos. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPSA/15678/1/cot361.pdf
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Marc: |
LEADER 00565nam a2200193 a 4500
001 1443255
005 2015-03-12
008 2004 bl uuuu u0uu1 u #d
100 1 $aKUNZ, A.
245 $aRecomendações para uso de esterqueiras para armazenagem de dejetos de suínos.
260 $aConcórdia: Embrapa Suínos e Aves$c2004
300 $a4 p.
490 $a(Embrapa Suínos e Aves. Comunicado Técnico, 361).
653 $aDejetos
653 $aEsterqueiras
653 $aSuínos
700 1 $aOLIVEIRA, P. A. V. de
700 1 $aHIGARASHI, M. M.
700 1 $aSANGOI, V.
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Embrapa Suínos e Aves (CNPSA) |
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