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Biblioteca(s): |
Embrapa Pecuária Sul. |
Data corrente: |
25/10/2016 |
Data da última atualização: |
25/10/2016 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
VIEIRA, I. M. B. P.; ROCHA, S. J. S.; VARELLA, A. C.; MAIA, M. B. |
Afiliação: |
IVONE MARIA BARP PAIM VIEIRA, BOLSISTA CPPSUL; SIDNEI JUNIOR SOUZA ROCHA, BOLSISTA CPPSUL; ALEXANDRE COSTA VARELLA, CPPSUL; MELISSA BATISTA MAIA, COLABORADORA CPPSUL. |
Título: |
Uso da separação botânica na avaliação da porcentagem de capim annoni 2 (Erasgrostis plana Ness) presente na pastagem em um sistema silvipastoril na região da Campanha, RS. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
In: CONGRESSO DE INICIAÇÃO CIENTÍFICA, 25.; SEMANA INTEGRADA DE ENSINO, PESQUISA E EXTENSÃO, 2., 2016, Pelotas. Anais... Pelotas: UFPel, 2016. |
Idioma: |
Português |
Notas: |
CIC. |
Conteúdo: |
Em meados do século XX através da importação de sementes de gramíneas forrageiras, surgiu nos campos do sul do Brasil uma das mais graves invasões biológicas dessa região: o Campim Annoni (Eragrostis plana Ness) |
Palavras-Chave: |
Eragrostis plananees. |
Thesagro: |
Capim annoni; Pastagem. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/149269/1/CA-04428.pdf
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Marc: |
LEADER 00977nam a2200193 a 4500 001 2055366 005 2016-10-25 008 2016 bl uuuu u00u1 u #d 100 1 $aVIEIRA, I. M. B. P. 245 $aUso da separação botânica na avaliação da porcentagem de capim annoni 2 (Erasgrostis plana Ness) presente na pastagem em um sistema silvipastoril na região da Campanha, RS.$h[electronic resource] 260 $aIn: CONGRESSO DE INICIAÇÃO CIENTÍFICA, 25.; SEMANA INTEGRADA DE ENSINO, PESQUISA E EXTENSÃO, 2., 2016, Pelotas. Anais... Pelotas: UFPel$c2016 500 $aCIC. 520 $aEm meados do século XX através da importação de sementes de gramíneas forrageiras, surgiu nos campos do sul do Brasil uma das mais graves invasões biológicas dessa região: o Campim Annoni (Eragrostis plana Ness) 650 $aCapim annoni 650 $aPastagem 653 $aEragrostis plananees 700 1 $aROCHA, S. J. S. 700 1 $aVARELLA, A. C. 700 1 $aMAIA, M. B.
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Embrapa Pecuária Sul (CPPSUL) |
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Registro Completo
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
23/03/2005 |
Data da última atualização: |
23/03/2005 |
Autoria: |
SIMÕES, F. R. |
Título: |
New electrode material for the electrochemical determination of 2,4 Diclorophenoxyacetic acid herbicide (2,4D). |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
In: ENCONTRO DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, SBPMAT, 2., out. 2003., Rio de Janeiro, RJ. Programa e Livro de resumos... Rio de Janeiro: SBPMat, 2003. Ref. A-P49. |
Idioma: |
Inglês |
Conteúdo: |
Conducting polymers have been used in many technological and scientific research applications. Due to the necessity of active materiais and great demand for different applications, the conducting polymer allows an increasing of versatility for the construction of sensors. In agriculture, in particular, the uncontrolled use of pesticide has been causing a great environmental impact, as for example the groundwater and surface water contamination. The most popular methods of pesticide analysis are the chromatographics mainly the HPLC and gas chromatography. These methods are sensible and selective, but they are laborious and expensive. Electroanalytical techniques have aIso been used as methods for pesticides determination in natural waters, soils, vegetables, fruits and other matrices. The main advantage of this method is the possibility of determining its concentration without previous treatments or separations. This work presents a new modified electrode for the determination of the herbicide 2,4 diclorophenoxyacetic acid (2,4D). This compound is known as not electroactive in electrodes as mercury, platinum and carbon (glassy, fiber or paste), but a new composite material consisting of carbon paste electrode and the conducting polymer polyaniline (PANI) was prepared, showing electroactivy and therefore, the possibility of the pesticide determination using electrochemical techniques. The analyses of the herbicide was carried out through cyclic voltammetry (C. V) in different pHs. The results showed good sensitivity and selectivity. MenosConducting polymers have been used in many technological and scientific research applications. Due to the necessity of active materiais and great demand for different applications, the conducting polymer allows an increasing of versatility for the construction of sensors. In agriculture, in particular, the uncontrolled use of pesticide has been causing a great environmental impact, as for example the groundwater and surface water contamination. The most popular methods of pesticide analysis are the chromatographics mainly the HPLC and gas chromatography. These methods are sensible and selective, but they are laborious and expensive. Electroanalytical techniques have aIso been used as methods for pesticides determination in natural waters, soils, vegetables, fruits and other matrices. The main advantage of this method is the possibility of determining its concentration without previous treatments or separations. This work presents a new modified electrode for the determination of the herbicide 2,4 diclorophenoxyacetic acid (2,4D). This compound is known as not electroactive in electrodes as mercury, platinum and carbon (glassy, fiber or paste), but a new composite material consisting of carbon paste electrode and the conducting polymer polyaniline (PANI) was prepared, showing electroactivy and therefore, the possibility of the pesticide determination using electrochemical techniques. The analyses of the herbicide was carried out through cyclic voltammetry (C. V) in different ... Mostrar Tudo |
Palavras-Chave: |
Pesticidas; Polímeros condutores. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02136naa a2200145 a 4500 001 1028888 005 2005-03-23 008 2003 bl --- 0-- u #d 100 1 $aSIMÕES, F. R. 245 $aNew electrode material for the electrochemical determination of 2,4 Diclorophenoxyacetic acid herbicide (2,4D). 260 $c2003 520 $aConducting polymers have been used in many technological and scientific research applications. Due to the necessity of active materiais and great demand for different applications, the conducting polymer allows an increasing of versatility for the construction of sensors. In agriculture, in particular, the uncontrolled use of pesticide has been causing a great environmental impact, as for example the groundwater and surface water contamination. The most popular methods of pesticide analysis are the chromatographics mainly the HPLC and gas chromatography. These methods are sensible and selective, but they are laborious and expensive. Electroanalytical techniques have aIso been used as methods for pesticides determination in natural waters, soils, vegetables, fruits and other matrices. The main advantage of this method is the possibility of determining its concentration without previous treatments or separations. This work presents a new modified electrode for the determination of the herbicide 2,4 diclorophenoxyacetic acid (2,4D). This compound is known as not electroactive in electrodes as mercury, platinum and carbon (glassy, fiber or paste), but a new composite material consisting of carbon paste electrode and the conducting polymer polyaniline (PANI) was prepared, showing electroactivy and therefore, the possibility of the pesticide determination using electrochemical techniques. The analyses of the herbicide was carried out through cyclic voltammetry (C. V) in different pHs. The results showed good sensitivity and selectivity. 653 $aPesticidas 653 $aPolímeros condutores 773 $tIn: ENCONTRO DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, SBPMAT, 2., out. 2003., Rio de Janeiro, RJ. Programa e Livro de resumos... Rio de Janeiro: SBPMat, 2003. Ref. A-P49.
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