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| Registros recuperados : 157 | |
| 11. |  | OLIVEIRA, T. C. de; TAVARES, E. D.; CAPORAL, F. R. Avaliação das unidades de experimentação agroecológica coletiva, no âmbito da política pública do Plano Brasil sem Miséria, no território do alto Sertão de Sergipe. In: SEMINÁRIO INTERNACIONAL DE AGROECOLOGIA, 2.; SEMINÁRIO DE AGROECOLOGIA DE PERNAMBUCO, 3.; JORNADA DOS POVOS DE PERNAMBUCO, 2., 2015, Recife. Diálogos de conhecimentos sobre agroecologia: anais. Recife: UFPE, 2015. 1 CD-ROM.| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| 18. | | BORTOLETTO, W. V.; MACEDO, W. R.; OLIVEIRA, T. C. de; SOUZA, D. S. Agrochemicals and storage times on soybean seed vigor. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 52, n. 2, p. 129-132, fev. 2017. Notas científicas.
Título em português: Agroquímicos e tempos de armazenamento no vigor de sementes de soja.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 19. | | OLIVEIRA, T. C. de; TAVARES, E. D.; COPORAL, F. R.; CURADO, F. F.; COLLADO, A. C. Diálogos entre educação-pesquisa-extensão: contraponto ao processo convencional de transferência de tecnologia no território do alto sertão sergipano. Cadernos de Agroecologia, v. 12, n. 1, jul. 2017. Apresentado no SEMINÁRIO NACIONAL DE EDUCAÇÃO EM AGROECOLOGIA, 2., 2016, Seropédica. Educação em agroecologia: resistências e lutas pela democracia: anais. Seropédica: ABA, 2016.| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| Registros recuperados : 157 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
08/02/2012 |
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Data da última atualização: |
05/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 5 |
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Autoria: |
SANTOS, M. D. R.; VITOR, A. DE P.; CARNEIRO, J. da C.; PACIULLO, D. S. C.; MATOS, R. C.; MATOS, M. A. C. |
|
Afiliação: |
MELLINA DAMASCENO RACHID SANTOS, UFJF; ALINE DE PAULA VITOR, UFJF; JAILTON DA COSTA CARNEIRO, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; RENATO CAMARGO MATOS, UFJF; MARIA AUXILIADORA COSTA MATOS, UFJF. |
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Título: |
Use of ultrasound bath in the extraction and quantification of Ester-Linked Phenolic Acids in tropical forages. |
|
Ano de publicação: |
2011 |
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Fonte/Imprenta: |
American Journal of Analytical Chemistry, v. 2, p. 344-351, 2011. |
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DOI: |
http://dx.doi.org/10.4236/ajac.2011.23042 |
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Idioma: |
Inglês |
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Conteúdo: |
A method was developed for the analysis of ester-linked phenolic acids in forage samples using extraction by an ultrasound-assisted treatment and quantification by HPLC with a UV-VIS detector. A reversed-phase C18 column was used for developing the method and the optimal condition was established with isocratic elution using acetonitrile/methanol/H3PO4 pH 2.08 (13:12.5:74.5) as the mobile phase. To reduce the time of sample processing, the extraction of ester-linked phenolic acids was studied using ultrasound bath and the results were then compared with those from an extraction usual using alkaline hydrolysis (20°C for 24 h). The method was valued through external and internal calibration. Internal calibration using o-coumaric acid as internal standard and m-coumaric acid as surrogate internal standard showed better results. The detection limits were of 0.09 and 0.04 mg●L-1 for p-coumaric and ferulic acids, respectively. The proposed method showed a good linear dynamic range (3.00 - 30.00 mg●L-1) for the analytes. The usefulness of the methodology was demonstrated by addition-recovery experiments using forage samples and values were in the 83 to 99% range. The extraction of ester-linked phenolic acids by 120 minutes of ultrasound bath was faster and more reproducible than alkaline hydrolysis (20°C for 24 h). |
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Palavras-Chave: |
Internal Calibration; Ultrasound Bath. |
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Thesaurus NAL: |
forage; phenolic acids. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02110naa a2200241 a 4500
001 1914719
005 2024-02-05
008 2011 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.4236/ajac.2011.23042$2DOI
100 1 $aSANTOS, M. D. R.
245 $aUse of ultrasound bath in the extraction and quantification of Ester-Linked Phenolic Acids in tropical forages.$h[electronic resource]
260 $c2011
520 $aA method was developed for the analysis of ester-linked phenolic acids in forage samples using extraction by an ultrasound-assisted treatment and quantification by HPLC with a UV-VIS detector. A reversed-phase C18 column was used for developing the method and the optimal condition was established with isocratic elution using acetonitrile/methanol/H3PO4 pH 2.08 (13:12.5:74.5) as the mobile phase. To reduce the time of sample processing, the extraction of ester-linked phenolic acids was studied using ultrasound bath and the results were then compared with those from an extraction usual using alkaline hydrolysis (20°C for 24 h). The method was valued through external and internal calibration. Internal calibration using o-coumaric acid as internal standard and m-coumaric acid as surrogate internal standard showed better results. The detection limits were of 0.09 and 0.04 mg●L-1 for p-coumaric and ferulic acids, respectively. The proposed method showed a good linear dynamic range (3.00 - 30.00 mg●L-1) for the analytes. The usefulness of the methodology was demonstrated by addition-recovery experiments using forage samples and values were in the 83 to 99% range. The extraction of ester-linked phenolic acids by 120 minutes of ultrasound bath was faster and more reproducible than alkaline hydrolysis (20°C for 24 h).
650 $aforage
650 $aphenolic acids
653 $aInternal Calibration
653 $aUltrasound Bath
700 1 $aVITOR, A. DE P.
700 1 $aCARNEIRO, J. da C.
700 1 $aPACIULLO, D. S. C.
700 1 $aMATOS, R. C.
700 1 $aMATOS, M. A. C.
773 $tAmerican Journal of Analytical Chemistry$gv. 2, p. 344-351, 2011.
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