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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
16/02/2017 |
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Data da última atualização: |
23/02/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RINALDI, M. M.; VIEIRA, E. A.; FIALHO, J. de F.; MALAQUIAS, J. V. |
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Afiliação: |
MARIA MADALENA RINALDI, CPAC; EDUARDO ALANO VIEIRA, CPAC; JOSEFINO DE FREITAS FIALHO, CPAC; JUACI VITORIA MALAQUIAS, CPAC. |
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Título: |
Shelf life of minimally processed cassava roots submitted to different conservation methods. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Científica, v. 45, n. 1, p. 9-17, 2017. |
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Páginas: |
p. 9-17 |
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Série: |
1984-5529 |
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Idioma: |
Inglês |
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Conteúdo: |
The useful life of minimally processed cassava roots submitted to different conservation methods was evaluated. Cassava roots in natura were physically characterized, minimally processed and stored after submission to treatments in different packaging types. During storage period, the product was submitted to physicochemical, sensorial and microbiological analyzes. Storage time and treatment influenced on minimally processed cassava roots quality. When only the sensorial analysis is considered, the useful life of minimally processed cassava roots was of 28 days for all treatments, except for the roots submitted to the CONTROL and CA treatments, which had a 24-day shelf life. However, at 14 days of storage, CONTROL, VAC, CA, and H2O treatments showed high psychotrophic count. Mold and yeast counts were also high for CONTROL and VAC treatments at 14 days of storage. At 28 days of storage, psychrotrophs, molds and yeasts count was high for all treatments. In general, the most recommended treatments, due to having a longer shelf life, were CA and H2O reaching a maximum period of 14 days of storage. Considering the cooking time and the other physicochemical analyzes, the 2.5% H2O+CA treatment is not recommended for the commercialization of minimally processed cassava roots. |
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Thesagro: |
Conservação; Embalagem; Mandioca; Manihot esculenta; Pós-colheita; Processamento mínimo; Temperatura. |
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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/item/173048/1/975-6684-1-PB.pdf
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Marc: |
LEADER 02013naa a2200265 a 4500
001 2064416
005 2018-02-23
008 2017 bl uuuu u00u1 u #d
100 1 $aRINALDI, M. M.
245 $aShelf life of minimally processed cassava roots submitted to different conservation methods.
260 $c2017
300 $ap. 9-17
490 $a1984-5529
520 $aThe useful life of minimally processed cassava roots submitted to different conservation methods was evaluated. Cassava roots in natura were physically characterized, minimally processed and stored after submission to treatments in different packaging types. During storage period, the product was submitted to physicochemical, sensorial and microbiological analyzes. Storage time and treatment influenced on minimally processed cassava roots quality. When only the sensorial analysis is considered, the useful life of minimally processed cassava roots was of 28 days for all treatments, except for the roots submitted to the CONTROL and CA treatments, which had a 24-day shelf life. However, at 14 days of storage, CONTROL, VAC, CA, and H2O treatments showed high psychotrophic count. Mold and yeast counts were also high for CONTROL and VAC treatments at 14 days of storage. At 28 days of storage, psychrotrophs, molds and yeasts count was high for all treatments. In general, the most recommended treatments, due to having a longer shelf life, were CA and H2O reaching a maximum period of 14 days of storage. Considering the cooking time and the other physicochemical analyzes, the 2.5% H2O+CA treatment is not recommended for the commercialization of minimally processed cassava roots.
650 $aConservação
650 $aEmbalagem
650 $aMandioca
650 $aManihot esculenta
650 $aPós-colheita
650 $aProcessamento mínimo
650 $aTemperatura
700 1 $aVIEIRA, E. A.
700 1 $aFIALHO, J. de F.
700 1 $aMALAQUIAS, J. V.
773 $tCientífica$gv. 45, n. 1, p. 9-17, 2017.
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Embrapa Cerrados (CPAC) |
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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: |
09/03/2005 |
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Data da última atualização: |
25/11/2009 |
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Autoria: |
SIMÕES, F. R.; MATTOSO, L. H. C.; VAZ, C. M. P. |
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Título: |
Modified carbon paste-polyaniline electrodes for the electrochemical determination of the herbicide 2,4-D. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Sensor letters, [S. l.], v. 2, n. 3-4, p. 221-225, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
Redox processes of pesticides have been used to establish electroanalytical procedures to determine these compounds in natural samples. For the herbicide 2,4 dichlorophenoxyacetic acid (2,4-D) it has been shown that no redox process take place in the most common electrode material (carbon, platinum, mercury) and electroanalytical conditions used. Modified carbon paste electrodes has been shown to be an alternative for the electrochemical determination of the herbicide 2,4-D. We investigate in this paper three modified carbon paste-polyaniline electrodes, using in-situ electropolymerization of aniline on the carbon paste surface (CPE1), mixing polyaniline powder with the carbon paste material (CPE2) and in-situ chemical polymerization of aniline on graphite powder (CPE3). The affinity of the 2,4-D with the polyaniline was investigated with UV-visible spectrophotometry and the electrochemical response of the three modified carbon paste-polyaniline electrodes by cyclic voltammetry. the UV-vis. results showed that about 60% of the herbicide sorbed on the polyaniline particles after 24 hours of contact. Typical cyclic voltammograms of the polyaniline were affected by the presence of the herbicide on polyaniline, increasing both anodic and cathodic currents at approximately 200 mV and 0 mV for the CPE2 and CPE3 electrodes. The best response was obtained with the CPE3 electrode. |
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Palavras-Chave: |
Determinação Eletroquimica. |
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Thesagro: |
Carbono; Herbicida. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01940naa a2200181 a 4500
001 1028846
005 2009-11-25
008 2004 bl --- 0-- u #d
100 1 $aSIMÕES, F. R.
245 $aModified carbon paste-polyaniline electrodes for the electrochemical determination of the herbicide 2,4-D.
260 $c2004
520 $aRedox processes of pesticides have been used to establish electroanalytical procedures to determine these compounds in natural samples. For the herbicide 2,4 dichlorophenoxyacetic acid (2,4-D) it has been shown that no redox process take place in the most common electrode material (carbon, platinum, mercury) and electroanalytical conditions used. Modified carbon paste electrodes has been shown to be an alternative for the electrochemical determination of the herbicide 2,4-D. We investigate in this paper three modified carbon paste-polyaniline electrodes, using in-situ electropolymerization of aniline on the carbon paste surface (CPE1), mixing polyaniline powder with the carbon paste material (CPE2) and in-situ chemical polymerization of aniline on graphite powder (CPE3). The affinity of the 2,4-D with the polyaniline was investigated with UV-visible spectrophotometry and the electrochemical response of the three modified carbon paste-polyaniline electrodes by cyclic voltammetry. the UV-vis. results showed that about 60% of the herbicide sorbed on the polyaniline particles after 24 hours of contact. Typical cyclic voltammograms of the polyaniline were affected by the presence of the herbicide on polyaniline, increasing both anodic and cathodic currents at approximately 200 mV and 0 mV for the CPE2 and CPE3 electrodes. The best response was obtained with the CPE3 electrode.
650 $aCarbono
650 $aHerbicida
653 $aDeterminação Eletroquimica
700 1 $aMATTOSO, L. H. C.
700 1 $aVAZ, C. M. P.
773 $tSensor letters, [S. l.]$gv. 2, n. 3-4, p. 221-225, 2004.
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Embrapa Instrumentação (CNPDIA) |
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