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| Registros recuperados : 19 | |
| 4. |  | VETTORAZI, C. A.; FERRAZ, S. F. de B. Uso de sistemas de informacoes geograficas aplicados a prevencao e combate a incendios em fragmentos florestais. Serie Tecnica IPEF, Piracicaba, v. 12, n. 32, p. 111-115, 1998. Edicao das Memorias do Simposio sobre Ecologia e Manejo de Fragmentos Florestais, 2., 1998, Piracicaba.| Biblioteca(s): Embrapa Florestas. |
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| 10. | | PAULA, F. R. de; GERHARD, P.; WENGER, S. J.; FERREIRA, A.; VETTORAZZI, C. A.; FERRAZ, S. F. de B. Influence of forest cover on in-stream large wood in an agricultural landscape of southeastern Brazil: a multi-scale analysis. Landscape Ecology, v. 28, n. 1, p. 13-27, Jan. 2013.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 11. | | AUGUSTI, J. C.; FERRAZ, F. F. de B.; FERRAZ, S. F. de B.; SILVA, J. F. da; CAMARGO, S. L. Cultivo integrado com florestas naturais reduz impacto. Visão Agrícola, Piracicaba, ano 2, n. 4, p. 62-65, jul./dez. 2005.| Biblioteca(s): Embrapa Florestas. |
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| 12. | | FERRAZ, S. F. de B.; PEREIRA, M. F.; PAULA, F. R. de; VETTORAZZI, C. A.; ALVARES, C. A. Simulação de perdas de solo em função de cenários de adequação ambiental em microbacias agrícolas. Scientia Forestalis, Piracicaba, v. 41, n. 98, p. 271-282, jun. 2013.| Biblioteca(s): Embrapa Florestas. |
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| 13. | | GARCIA, L. G.; FERRAZ, S. F. de B.; ALVARES, C. A.; FERRAZ, K. M. P. M. de B.; HIGA, R. C. V. Modelagem da aptidão climática do Eucalyptus grandis frente aos cenários de mudanças climáticas no Brasil. Scientia Forestalis, Piracicaba, v. 42, n. 103, p. 503-511, dez. 2014.| Biblioteca(s): Embrapa Florestas. |
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| 15. | | FERREIRA, A.; PAULA, F. R. de; FERRAZ, S. F. de B.; GERHARD, P.; KASHIWAQUI, E. A. L.; CYRINO, J. E. P.; MARTINELLI, L. A. Riparian coverage affects diets of characids in neotropical streams. Ecology of Freshwater Fish, v. 21, n. 1, p. 12-22, Jan. 2012.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 16. | | GARCIA, L. G.; SALEMI, L. F.; MINGOTI, R.; CASSIANO, C. C.; FRANSOZI, A. A.; FARIA, V. G. DE; VETTORAZZI, C. A.; LIMA, W. L.; FERRAZ, S. F. DE B. Hydrological effects of spatial harvest patterns in a small catchment Covered by fast-growing plantations in the neotropics. Advances in Environmental and Engineering Research, v. 4, n. 1, p. 1-17, 2023.| Biblioteca(s): Embrapa Territorial. |
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| 17. | | BARLOW, J.; LENNOX, G. D.; FERREIRA, J.; BERENGUER, E.; LEES, A. C.; NALLY, R. M.; THOMSON, J. R.; FERRAZ, S. F. de B.; LOUZADA, J.; OLIVEIRA, V. H. F.; PARRY, L.; SOLAR, R. R. de C.; VIEIRA, I. C. G.; ARAGÃO, L. E. O. C.; BEGOTTI, R. A.; BRAGA, R. F.; CARDOSO, T. M.; OLIVEIRA JUNIOR, R. C. de; SOUZA JUNIOR, C. M.; MOURA, N. G.; NUNES, S. S.; SIQUEIRA, J. V.; PARDINI, R.; SILVEIRA, J. M.; VAZ-DE-MELLO, F. Z.; VEIGA, R. C. S.; VENTURIERI, A.; GARDNER, T. A. Anthropogenic disturbance in tropical forests can double biodiversity loss from deforestation. Nature, v. 535, n. 7610, p. 144-147, July 2016.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 18. | | GARDNER, T. A.; FERREIRA, J.; BARLOW, J.; LEES, A. C.; PARRY, L.; VIEIRA, I. C. G.; BERENGUER, E.; ABRAMOVAY, R.; ALEIXO, A.; ANDRETTI, C.; ARAGAO, L. E. O. C.; ARAUJO, I.; AVILA, W. S. de; BARDGETT, R. D.; BATISTELLA, M.; BEGOTTI, R. A.; BELDINI, T.; BLAS, D. E. de; BRAGA, R. F.; BRAGA, D. de L.; BRITO, J. G. de; CAMARGO, P. B. de; SANTOS, F. C. dos; OLIVEIRA, V. C. de; CORDEIRO, A. C. N.; CARDOSO, T. M.; CARVALHO, D. R. de; CASTELANI, S. A.; CHAUL, J. C. M.; CERRI, C. E.; COSTA, F. de A.; COSTA, C. D. F. da; COUDEL, E.; COUTINHO, A. C.; CUNHA, D.; D'ANTONA, A.; DEZINCOURT, J.; DIAS-SILVA, K.; DURIGAN, M.; ESQUERDO, J. C. D. M.; FERES, J.; FERRAZ, S. F. de B.; FERREIRA, A. E. de M.; FIORINI, A. C.; SILVA, L. V. F. da; FRAZAO, F. S.; GARRETT, R.; GOMES, A. dos S.; GONCALVES, K. da S.; GUERRERO, J. B.; HAMADA, N.; HUGHES, R. M.; IGLIORI, D. C.; JESUS, E. da C.; JUEN, L.; MIÉRCIO JUNIOR; OLIVEIRA JUNIOR, J. M. B. de; OLIVEIRA JUNIOR, R. C. de; SOUZA JUNIOR, C.; KAUFMANN, P.; KORASAKI, V.; LEAL, C. G.; LEITAO, R.; LIMA, N.; ALMEIDA, M. de F. L.; LOURIVAL, R.; LOUZADA, J.; NALLY, R. M.; MARCHAND, S.; MAUES, M. M.; MOREIRA, F. M. S.; MORSELLO, C.; MOURA, N.; NESSIMIAN, J.; NUNES, S.; OLIVEIRA, V. H. F.; PARDINI, R.; PEREIRA, H. C.; POMPEU, P. S.; RIBAS, C. R.; ROSSETTI, F.; SCHMIDT, F. A.; SILVA, R. da; MARTINS DA SILVA, R. C. V.; SILVA, T. F. M. R. da; SILVEIRA, J.; SIQUEIRA, J. V.; CARVALHO, T. S. de; SOLAR, R. R. C.; TANCREDI, N. S. H.; THOMSON, J. R.; TORRES, P. C.; VAZ-DE-MELLO, F. Z.; VEIGA, R. C. S.; VENTURIERI, A.; VIANA, C.; WEINHOLD, D.; ZANETTI, R.; ZUANON, J. A social and ecological assessment of tropical land uses at multiple scales: the Sustainable Amazon Network. Philosophical Transactions of The Royal Society, serie B: Biological Sciences, v. 368, n. 1619, p. 1-11, Apr. 2013.| Biblioteca(s): Embrapa Agricultura Digital; Embrapa Amazônia Oriental; Embrapa Territorial. |
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| 19. | | GARDNE, T. A.; FERREIRA, J.; BARLOW, J.; LEES, A. C.; PERRY, L.; VIEIRA, I. C. G.; BERENGUER, E.; ABRAMOVAY, R.; ALEIXO, A.; ANDRETTI, C.; ARAGÃO, L. E. O. C; ARAUJO, I.; ÁVILA, W. S. de; BARDGETT, R. D.; BATISTELLA, M.; BEGOTTI, R. A.; BELDINI, T.; BLAS, D. E. de; BRAGA, R. F.; BRAGA, D. de L.; BRITO, J. G. de; CAMARGO, P. B. de; SANTOS, F. C. dos; OLIVEIRA, V. C. de; CORDEIRO, A. C. N.; CARDOSO, T. M.; CARVALHO, D. R. de; CASTELANI, S. A.; CHAUL, J. C. M.; CERRI, C. E.; COSTA, F. de A. C.; COSTA, C. D. F. da; COUDEL, E.; COUTINHO, A. C.; CUNHA, D.; D'ANTONA, A.; DEZINCOURT, J.; DIAS-SILVA, K.; DURIGAN, M.; ESQUERDO, J. C. D. M.; FERES, J.; FERRAZ, S. F. de B.; FERREIRA, A. E. de M.; FIORINI, A. C.; SILVA, L. V. F. da; FRAZÃO, F. S.; GARRETT, R.; GOMES, A. dos S.; GONÇALVES, K. da S.; GUERRERO, J. B.; HAMADA, N.; HUGHES, R. M.; IGLIORI, D. C.; JESUS, E. da C.; JUEN, L.; JUNIOR, M.; JUNIOR, J. N. D. de O.; JUNIOR, R. C. de O.; JUNIOR, C. S.; KAUFMANN, P.; KORASAKI, V.; LEAL, C. G.; LEITÃO, R.; LIMA, N.; ALMEIDA, M. de F. L.; LOURIVAL, R.; LOUZADA, J.; NALLY, R. M.; MARCHAND, S.; MAUÉS, M. M.; MOREIRA, F. M. S.; MORSELLO, C.; MOURA, M.; NESSIMIAN, J.; NUNES, S.; OLIVEIRA, V. H. F.; PARDINI, R.; PEREIRA, H. C.; POMPEU, P. S.; RIBAS, C. R.; ROSSETTI, F.; SCHMIDT, F. A.; SILVA, R. da; SILVA, R. C. V. M. da; SILVA, D. F. M. R. da; SILVEIRA, J.; SIQUEIRA, J. V.; CARVALHO, T. S. de; SOLAR, R. R. C.; TANCREDI, N. S. H.; THOMSON, J. R.; TORRES, T. C.; VAZ-DE-MELLO, F. Z.; VEIGA, R. C. S.; VENTURIERI, A.; VIANA, C.; WEINHOLD, D.; ZANETTI, R.; ZUANON, J. A social and ecological assessment of tropical land uses at multiple scales: the Sustainable Amazon network Philosophical Transactions of The Royal Society, serie B: Biological Sciences, v. 368, n. 1619, p. 1-11, Apr. 2013.| Biblioteca(s): Embrapa Agrobiologia. |
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| Registros recuperados : 19 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/03/2022 |
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Data da última atualização: |
23/01/2024 |
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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, P. F. da; GOMES, B. F.; LOBO, C. M. S.; CARMO, M.; ROTH, C.; COLNAGO, L. A. |
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Afiliação: |
LUIZ ALBERTO COLNAGO, CNPDIA. |
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Título: |
Composite graphite epoxy electrodes for in situ electrochemistry coupling with high resolution NMR. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
ACS Omega 2022, v. 7, 2022. |
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Páginas: |
4991-5000 |
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DOI: |
https://doi.org/10.1021/acsomega.1c05823 |
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Idioma: |
Inglês |
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Conteúdo: |
The in situ coupling between electrochemistry and spectrometric techniques can help in the identification and quantification of the compounds produced and consumed during electrochemical reactions. The combination of electrochemistry with nuclear magnetic resonance is quite attractive in this respect, but it has some challenges to be addressed, namely, the reduction in the quality of the NMR signal when the metallic electrodes are placed close to or in the detection region. Since NMR is not a passive technique, the convective effect of the magnetic force (magnetoelectrolysis), which acts by mixing the solution and increasing the mass transport, has to be considered. In seeking to solve the aforementioned problems, we developed a system of miniaturized electrodes inside a 5 mm NMR tube (outer diameter); the working and counter electrodes were prepared with a mixture of graphite powder and epoxy resin. To investigate the performance of the electrodes, the benzoquinone reduction to hydroquinone and the isopropanol oxidation to acetone were monitored. To monitor the alcohol oxidation reaction, the composite graphite−epoxy electrode (CGEE) surface was modified through platinization. The electrode was efficient for in situ monitoring of the aforementioned reactions, when positioned 1 mm above the detection region of the NMR spectrometer. The magnetoelectrolysis effect acts by stirring the solution and increases the reaction rate of the reduction of benzoquinone, because this reaction is limited by mass transport, while no effect on the reaction rate is observed for the isopropanol oxidation reaction. MenosThe in situ coupling between electrochemistry and spectrometric techniques can help in the identification and quantification of the compounds produced and consumed during electrochemical reactions. The combination of electrochemistry with nuclear magnetic resonance is quite attractive in this respect, but it has some challenges to be addressed, namely, the reduction in the quality of the NMR signal when the metallic electrodes are placed close to or in the detection region. Since NMR is not a passive technique, the convective effect of the magnetic force (magnetoelectrolysis), which acts by mixing the solution and increasing the mass transport, has to be considered. In seeking to solve the aforementioned problems, we developed a system of miniaturized electrodes inside a 5 mm NMR tube (outer diameter); the working and counter electrodes were prepared with a mixture of graphite powder and epoxy resin. To investigate the performance of the electrodes, the benzoquinone reduction to hydroquinone and the isopropanol oxidation to acetone were monitored. To monitor the alcohol oxidation reaction, the composite graphite−epoxy electrode (CGEE) surface was modified through platinization. The electrode was efficient for in situ monitoring of the aforementioned reactions, when positioned 1 mm above the detection region of the NMR spectrometer. The magnetoelectrolysis effect acts by stirring the solution and increases the reaction rate of the reduction of benzoquinone, because this react... Mostrar Tudo |
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Palavras-Chave: |
Electrochemical reactions; Magnetoelectrolysis; Nuclear magnetic resonance. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/232809/1/P-Composite-Graphite8722Epoxy-Electrodes-for-In-Situ-Electrochemistry.pdf
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Marc: |
LEADER 02349naa a2200241 a 4500
001 2141124
005 2024-01-23
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1021/acsomega.1c05823$2DOI
100 1 $aSILVA, P. F. da
245 $aComposite graphite epoxy electrodes for in situ electrochemistry coupling with high resolution NMR.$h[electronic resource]
260 $c2022
300 $a4991-5000
520 $aThe in situ coupling between electrochemistry and spectrometric techniques can help in the identification and quantification of the compounds produced and consumed during electrochemical reactions. The combination of electrochemistry with nuclear magnetic resonance is quite attractive in this respect, but it has some challenges to be addressed, namely, the reduction in the quality of the NMR signal when the metallic electrodes are placed close to or in the detection region. Since NMR is not a passive technique, the convective effect of the magnetic force (magnetoelectrolysis), which acts by mixing the solution and increasing the mass transport, has to be considered. In seeking to solve the aforementioned problems, we developed a system of miniaturized electrodes inside a 5 mm NMR tube (outer diameter); the working and counter electrodes were prepared with a mixture of graphite powder and epoxy resin. To investigate the performance of the electrodes, the benzoquinone reduction to hydroquinone and the isopropanol oxidation to acetone were monitored. To monitor the alcohol oxidation reaction, the composite graphite−epoxy electrode (CGEE) surface was modified through platinization. The electrode was efficient for in situ monitoring of the aforementioned reactions, when positioned 1 mm above the detection region of the NMR spectrometer. The magnetoelectrolysis effect acts by stirring the solution and increases the reaction rate of the reduction of benzoquinone, because this reaction is limited by mass transport, while no effect on the reaction rate is observed for the isopropanol oxidation reaction.
653 $aElectrochemical reactions
653 $aMagnetoelectrolysis
653 $aNuclear magnetic resonance
700 1 $aGOMES, B. F.
700 1 $aLOBO, C. M. S.
700 1 $aCARMO, M.
700 1 $aROTH, C.
700 1 $aCOLNAGO, L. A.
773 $tACS Omega 2022$gv. 7, 2022.
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Embrapa Instrumentação (CNPDIA) |
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