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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. |
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Registro Completo |
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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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Autoria: |
SANTOS, M. D. R.; VITOR, A. DE P.; CARNEIRO, J. da C.; PACIULLO, D. S. C.; MATOS, R. C.; MATOS, M. A. C. |
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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. |
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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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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado; Embrapa Milho e Sorgo. |
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Data corrente: |
11/07/2022 |
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Data da última atualização: |
11/07/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
SILVA, A. F. da; PADRÃO, V. A.; CONCENÇO, G.; GALON, L.; ASPIAZÚ, I. |
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Afiliação: |
ALEXANDRE FERREIRA DA SILVA, CNPMS; VITOR ABREU PADRÃO, Universidade Federal de São João Del-Rei; GERMANI CONCENCO, CPACT; LEANDRO GALON, Universidade Federal da Fronteira Sul; IGNACIO ASPIAZÚ, Universidade Estadual de Minas Gerais. |
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Título: |
Control efficacy and phytosociological characterization of weeds as a function of post-emergence herbicides applied to maize. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Revista Brasileira de Milho e Sorgo, v. 21, e1240, 2022. |
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DOI: |
https://doi.org/10.18512/rbms2022v21e1240 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT - Studies evaluating the effectiveness of herbicides on weed control, coupled with the sustainability of the weed management system, are of great importance. The present study aims to evaluate the efficacy of post-emergence herbicides applied to maize while inferring the sustainability of the treatments employing an ecological approach. The experiment was installed in a randomized block design with four replications. The treatments consisted of the application of atrazine at the dose of 1500 g ha-1; atrazine + mesotrione at 1500 + 72 g ha-1; atrazine + tembotrione at 1500 + 100.8 g ha-1; atrazine + nicosulfuron at 1500 + 22.5 g ha-1; atrazine + glyphosate at 1500 g ha-1 + 792.5 g ha-1, in addition to weeded and infested control treatments. The herbicides were applied at the 4 leaf stage of maize. The phytotoxicity and control efficacy was assessed 7, 14, 21, and 28 days after applying treatments (DAT). In addition, a phytosociological survey of all plots was carried out in the last assessment. Herbicides did not cause phytotoxicity symptoms to the crop. However, associations of atrazine with glyphosate and atrazine with tembotrione promoted the greater effectiveness of weed control. Despite being classified as one of the treatments with better effectiveness, the association between glyphosate and atrazine, caused a more significant reduction in the diversity of the plant community, and alternative weed management practices should be applied to maize cropping fields to avoid weed selection.
RESUMO - Estudos avaliando a eficácia de herbicidas no controle de plantas daninhas, aliados à sustentabilidade do sistema de manejo de plantas daninhas, são de grande importância. O presente estudo tem como objetivo avaliar a eficácia de herbicidas pós-emergência aplicados ao milho e inferir a sustentabilidade dos tratamentos utilizando uma abordagem ecológica. O experimento foi instalado em delineamento de blocos casualizados com quatro repetições. Os tratamentos consistiram na aplicação de atrazina na dose de 1500 g ha-1; atrazina + mesotriona a 1500 + 72 g ha-1; atrazina + tembotriona a 1500 + 100,8 g ha-1; atrazina + nicossulfurão a 1500 + 22,5 g ha-1; atrazina + glifosato a 1500 g ha-1 + 792,5 g ha-1, além dos tratamentos de controle capinado e infestado. Os herbicidas foram aplicados no estádio de 4 folhas do milho. A fitotoxicidade e a eficácia do controle foram avaliadas 7, 14, 21 e 28 dias após a aplicação dos tratamentos (DAT). Além disso, na última avaliação foi realizado um levantamento fitossociológico de todas as parcelas. Os herbicidas não causaram sintomas de fitotoxicidade à cultura. No entanto, associações de atrazina com glyphosate e atrazina com tembotrione promoveram maior eficácia no controle de plantas daninhas. Apesar de ser classificado como um dos tratamentos com melhor eficácia, a associação entre glyphosate e atrazina, causou uma redução mais significativa na diversidade da comunidade vegetal, e práticas alternativas de manejo de plantas daninhas devem ser aplicadas aos campos de cultivo de milho para evitar a seleção de plantas daninhas. MenosABSTRACT - Studies evaluating the effectiveness of herbicides on weed control, coupled with the sustainability of the weed management system, are of great importance. The present study aims to evaluate the efficacy of post-emergence herbicides applied to maize while inferring the sustainability of the treatments employing an ecological approach. The experiment was installed in a randomized block design with four replications. The treatments consisted of the application of atrazine at the dose of 1500 g ha-1; atrazine + mesotrione at 1500 + 72 g ha-1; atrazine + tembotrione at 1500 + 100.8 g ha-1; atrazine + nicosulfuron at 1500 + 22.5 g ha-1; atrazine + glyphosate at 1500 g ha-1 + 792.5 g ha-1, in addition to weeded and infested control treatments. The herbicides were applied at the 4 leaf stage of maize. The phytotoxicity and control efficacy was assessed 7, 14, 21, and 28 days after applying treatments (DAT). In addition, a phytosociological survey of all plots was carried out in the last assessment. Herbicides did not cause phytotoxicity symptoms to the crop. However, associations of atrazine with glyphosate and atrazine with tembotrione promoted the greater effectiveness of weed control. Despite being classified as one of the treatments with better effectiveness, the association between glyphosate and atrazine, caused a more significant reduction in the diversity of the plant community, and alternative weed management practices should be applied to maize cropping fields ... Mostrar Tudo |
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Palavras-Chave: |
Dissimilaridade; Dissimilarity; Diversidade; Diversity; Planta daninha. |
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Thesagro: |
Controle Químico; Erva Daninha; Herbicida; Zea Mays. |
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Thesaurus NAL: |
Chemical control. |
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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/1144576/1/Control-efficacy-and-phytosociological-characterization-of-weeds.pdf
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Marc: |
LEADER 04058naa a2200301 a 4500
001 2144576
005 2022-07-11
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.18512/rbms2022v21e1240$2DOI
100 1 $aSILVA, A. F. da
245 $aControl efficacy and phytosociological characterization of weeds as a function of post-emergence herbicides applied to maize.$h[electronic resource]
260 $c2022
520 $aABSTRACT - Studies evaluating the effectiveness of herbicides on weed control, coupled with the sustainability of the weed management system, are of great importance. The present study aims to evaluate the efficacy of post-emergence herbicides applied to maize while inferring the sustainability of the treatments employing an ecological approach. The experiment was installed in a randomized block design with four replications. The treatments consisted of the application of atrazine at the dose of 1500 g ha-1; atrazine + mesotrione at 1500 + 72 g ha-1; atrazine + tembotrione at 1500 + 100.8 g ha-1; atrazine + nicosulfuron at 1500 + 22.5 g ha-1; atrazine + glyphosate at 1500 g ha-1 + 792.5 g ha-1, in addition to weeded and infested control treatments. The herbicides were applied at the 4 leaf stage of maize. The phytotoxicity and control efficacy was assessed 7, 14, 21, and 28 days after applying treatments (DAT). In addition, a phytosociological survey of all plots was carried out in the last assessment. Herbicides did not cause phytotoxicity symptoms to the crop. However, associations of atrazine with glyphosate and atrazine with tembotrione promoted the greater effectiveness of weed control. Despite being classified as one of the treatments with better effectiveness, the association between glyphosate and atrazine, caused a more significant reduction in the diversity of the plant community, and alternative weed management practices should be applied to maize cropping fields to avoid weed selection. RESUMO - Estudos avaliando a eficácia de herbicidas no controle de plantas daninhas, aliados à sustentabilidade do sistema de manejo de plantas daninhas, são de grande importância. O presente estudo tem como objetivo avaliar a eficácia de herbicidas pós-emergência aplicados ao milho e inferir a sustentabilidade dos tratamentos utilizando uma abordagem ecológica. O experimento foi instalado em delineamento de blocos casualizados com quatro repetições. Os tratamentos consistiram na aplicação de atrazina na dose de 1500 g ha-1; atrazina + mesotriona a 1500 + 72 g ha-1; atrazina + tembotriona a 1500 + 100,8 g ha-1; atrazina + nicossulfurão a 1500 + 22,5 g ha-1; atrazina + glifosato a 1500 g ha-1 + 792,5 g ha-1, além dos tratamentos de controle capinado e infestado. Os herbicidas foram aplicados no estádio de 4 folhas do milho. A fitotoxicidade e a eficácia do controle foram avaliadas 7, 14, 21 e 28 dias após a aplicação dos tratamentos (DAT). Além disso, na última avaliação foi realizado um levantamento fitossociológico de todas as parcelas. Os herbicidas não causaram sintomas de fitotoxicidade à cultura. No entanto, associações de atrazina com glyphosate e atrazina com tembotrione promoveram maior eficácia no controle de plantas daninhas. Apesar de ser classificado como um dos tratamentos com melhor eficácia, a associação entre glyphosate e atrazina, causou uma redução mais significativa na diversidade da comunidade vegetal, e práticas alternativas de manejo de plantas daninhas devem ser aplicadas aos campos de cultivo de milho para evitar a seleção de plantas daninhas.
650 $aChemical control
650 $aControle Químico
650 $aErva Daninha
650 $aHerbicida
650 $aZea Mays
653 $aDissimilaridade
653 $aDissimilarity
653 $aDiversidade
653 $aDiversity
653 $aPlanta daninha
700 1 $aPADRÃO, V. A.
700 1 $aCONCENÇO, G.
700 1 $aGALON, L.
700 1 $aASPIAZÚ, I.
773 $tRevista Brasileira de Milho e Sorgo$gv. 21, e1240, 2022.
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Embrapa Milho e Sorgo (CNPMS) |
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