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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
29/09/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BLUM, S. A.; ZAHREBELNEI, F.; NAGATA, N.; ZUCOLOTTO, V.; MATTOSO, L. H. C.; PESSOA, C. A.; GARCIA, J. R.; WOHNRATH, K. |
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Afiliação: |
LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA. |
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Título: |
Experimental design to enhance dopamine electrochemical detection using carbon paste electrodes. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Brazilian Journal of Analytical Chemistry, v. 8, n. 32, 2021. |
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Páginas: |
178?197 |
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ISSN: |
2179-3425 |
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DOI: |
10.30744/brjac.2179-3425.AR-31-2021 |
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Idioma: |
Inglês |
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Conteúdo: |
Efforts have been made on the development of new modified electrodes to be used in the fast determination of neurotransmitters, either in commercial drugs or in biological samples. Determination of dopamine (DA), for example, is of great importance since the lack of this neurotransmitter is related to many neurological disorders, including Parkinson’s and Alzheimer’s diseases. In this paper, we present a detailed electrochemical characterization, as well as DA detection studies of paste electrodes incorporating carbon materials in different allotropic forms, including carbon black modified with intrinsically conducting polymers (Eeonomers®), pristine carbon black, graphite, and carbon nanotubes. Emphasis is put on the smaller particle size and larger specific surface area of CB Eeonomers® materials, which led to an improved electroanalytical performance for the developed devices. The electrodes fabricated with Eeonomers® modified with polyaniline exhibited the highest current response towards DA detection, in addition to the ability of distinguishing DA from its natural interferent, ascorbic acid. Furthermore, a central composite design was used to investigate the influence of pH and electrode composition (proportion of Eeonomers®) on the electrochemical sensing of DA. A greater sensitivity was achieved for 50:50 (w/w) KP20/KPy20 electrode at pH 7.0. The optimized devices showed to be promising tools to perform quick, cheap and sensitive detection of this neurotransmitter in bioanalytical systems MenosEfforts have been made on the development of new modified electrodes to be used in the fast determination of neurotransmitters, either in commercial drugs or in biological samples. Determination of dopamine (DA), for example, is of great importance since the lack of this neurotransmitter is related to many neurological disorders, including Parkinson’s and Alzheimer’s diseases. In this paper, we present a detailed electrochemical characterization, as well as DA detection studies of paste electrodes incorporating carbon materials in different allotropic forms, including carbon black modified with intrinsically conducting polymers (Eeonomers®), pristine carbon black, graphite, and carbon nanotubes. Emphasis is put on the smaller particle size and larger specific surface area of CB Eeonomers® materials, which led to an improved electroanalytical performance for the developed devices. The electrodes fabricated with Eeonomers® modified with polyaniline exhibited the highest current response towards DA detection, in addition to the ability of distinguishing DA from its natural interferent, ascorbic acid. Furthermore, a central composite design was used to investigate the influence of pH and electrode composition (proportion of Eeonomers®) on the electrochemical sensing of DA. A greater sensitivity was achieved for 50:50 (w/w) KP20/KPy20 electrode at pH 7.0. The optimized devices showed to be promising tools to perform quick, cheap and sensitive detection of this neurotransmitter in... Mostrar Tudo |
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Palavras-Chave: |
Carbon black; Carbon paste electrode; Intrinsically conducting polymers; Response surface. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02401naa a2200289 a 4500
001 2134844
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a2179-3425
024 7 $a10.30744/brjac.2179-3425.AR-31-2021$2DOI
100 1 $aBLUM, S. A.
245 $aExperimental design to enhance dopamine electrochemical detection using carbon paste electrodes.$h[electronic resource]
260 $c2021
300 $a178?197
520 $aEfforts have been made on the development of new modified electrodes to be used in the fast determination of neurotransmitters, either in commercial drugs or in biological samples. Determination of dopamine (DA), for example, is of great importance since the lack of this neurotransmitter is related to many neurological disorders, including Parkinson’s and Alzheimer’s diseases. In this paper, we present a detailed electrochemical characterization, as well as DA detection studies of paste electrodes incorporating carbon materials in different allotropic forms, including carbon black modified with intrinsically conducting polymers (Eeonomers®), pristine carbon black, graphite, and carbon nanotubes. Emphasis is put on the smaller particle size and larger specific surface area of CB Eeonomers® materials, which led to an improved electroanalytical performance for the developed devices. The electrodes fabricated with Eeonomers® modified with polyaniline exhibited the highest current response towards DA detection, in addition to the ability of distinguishing DA from its natural interferent, ascorbic acid. Furthermore, a central composite design was used to investigate the influence of pH and electrode composition (proportion of Eeonomers®) on the electrochemical sensing of DA. A greater sensitivity was achieved for 50:50 (w/w) KP20/KPy20 electrode at pH 7.0. The optimized devices showed to be promising tools to perform quick, cheap and sensitive detection of this neurotransmitter in bioanalytical systems
653 $aCarbon black
653 $aCarbon paste electrode
653 $aIntrinsically conducting polymers
653 $aResponse surface
700 1 $aZAHREBELNEI, F.
700 1 $aNAGATA, N.
700 1 $aZUCOLOTTO, V.
700 1 $aMATTOSO, L. H. C.
700 1 $aPESSOA, C. A.
700 1 $aGARCIA, J. R.
700 1 $aWOHNRATH, K.
773 $tBrazilian Journal of Analytical Chemistry$gv. 8, n. 32, 2021.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Biblioteca |
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Origem |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
17/11/2017 |
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Data da última atualização: |
13/03/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
POORTER, L.; SANDE, M. van der; ARETS, E. J. M. M.; ASCARRUNZ, N.; ENQUIST, B.; FINEGAN, B.; LICONA, J. C.; MARTINEZ-RAMOS, M.; FREITAS, L. J. M. de; MEAVE, J. A.; MUÑOZ, R.; NYTCH, C. J.; OLIVEIRA, A. A. de; PÉREZ-GARCÍA, E. A.; PRADO-JUNIOR, J.; RODRÍGUEZ-VELÁZQUES, J.; RUSCHEL, A. R.; SALGADO-NEGRET, B.; SCHIAVINI, I.; SWENSON, N. G.; TENORIO, E. A.; THOMPSON, J.; TOLEDO, M.; URIARTE, M.; HOUT, P. van der; ZIMMERMAN, J. K.; PEÑA-CLAROS, M. |
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Afiliação: |
Lourens Poorter, Wageningen University and Research; Masha T. van der Sande, Wageningen University and Research; Eric J. M. M. Arets, Wageningen University and Research; Nataly Ascarrunz, Instituto Boliviano de Investigacion Forestal (IBIF), FCA-UAGRM; Brian Enquist, University of Arizona; Bryan Finegan, CATIE; Juan Carlos Licona, Instituto Boliviano de Investigacion Forestal (IBIF), FCA-UAGRM; Miguel Martínez-Ramos, Universidad Nacional Autónoma de México; LUCAS JOSE MAZZEI DE FREITAS, CPATU; Jorge A. Meave, Universidad Nacional Autónoma de México; Rodrigo Muñoz, Universidad Nacional Autónoma de México; Christopher J. Nytch, University of Puerto Rico; Alexandre A. de Oliveira, USP; Eduardo A. Pérez-García, Universidad Nacional Autónoma de México; Jamir Prado-Junior, UFU; Jorge Rodríguez-Velázques, Universidad Nacional Autónoma de México; ADEMIR ROBERTO RUSCHEL, CPATU; Beatriz Salgado-Negret, Instituto de Investigación de Recursos Biológicos Alexander von Humboldt / Universidad del Norte; Ivan Schiavini, Instituto de Investigación de Recursos Biológicos Alexander von Humboldt; Nathan G. Swenson, University of Maryland; Elkin A. Tenorio, Instituto de Investigación de Recursos Biológicos Alexander von Humboldt / Calima: Fundación para la Investigación de la Biodiversidad y Conservación en el Trópico; Jill Thompson, University of Puerto Rico / Centre for Ecology & Hydrology, Bush Estate; Marisol Toledo, UAGRM; Maria Uriarte, Columbia University; Peter van der Hout, Van der Hout Forestry Consulting; Jess K. Zimmerman, University of Puerto Rico; Marielos Peña-Claros, Wageningen University and Research. |
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Título: |
Biodiversity and climate determine the functioning of Neotropical forests. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Global Ecology and Biogeography, v. 26, n. 12, p. 1423-1434, Dec. 2017. |
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DOI: |
10.1111/geb.12668 |
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Idioma: |
Inglês |
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Conteúdo: |
Tropical forests account for a quarter of the global carbon storage and a third of the terrestrial productivity. Few studies have teased apart the relative importance of environmental factors and forest attributes for ecosystem functioning, especially for the tropics. This study aims to relate aboveground biomass (AGB) and biomass dynamics (i.e., net biomass productivity and its underlying demographic drivers: biomass recruitment, growth and mortality) to forest attributes (tree diversity, community-mean traits and stand basal area) and environmental conditions (water availability, soil fertility and disturbance). |
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Palavras-Chave: |
Dinâmica da floresta. |
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Thesagro: |
Água; Biodiversidade; Biomassa; Carbono; Ecossistema; Fertilidade do Solo; Floresta Tropical; Produtividade. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1080011/1/Poorter2017.pdf
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Marc: |
LEADER 02149naa a2200553 a 4500
001 2080011
005 2018-03-13
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1111/geb.12668$2DOI
100 1 $aPOORTER, L.
245 $aBiodiversity and climate determine the functioning of Neotropical forests.$h[electronic resource]
260 $c2017
520 $aTropical forests account for a quarter of the global carbon storage and a third of the terrestrial productivity. Few studies have teased apart the relative importance of environmental factors and forest attributes for ecosystem functioning, especially for the tropics. This study aims to relate aboveground biomass (AGB) and biomass dynamics (i.e., net biomass productivity and its underlying demographic drivers: biomass recruitment, growth and mortality) to forest attributes (tree diversity, community-mean traits and stand basal area) and environmental conditions (water availability, soil fertility and disturbance).
650 $aÁgua
650 $aBiodiversidade
650 $aBiomassa
650 $aCarbono
650 $aEcossistema
650 $aFertilidade do Solo
650 $aFloresta Tropical
650 $aProdutividade
653 $aDinâmica da floresta
700 1 $aSANDE, M. van der
700 1 $aARETS, E. J. M. M.
700 1 $aASCARRUNZ, N.
700 1 $aENQUIST, B.
700 1 $aFINEGAN, B.
700 1 $aLICONA, J. C.
700 1 $aMARTINEZ-RAMOS, M.
700 1 $aFREITAS, L. J. M. de
700 1 $aMEAVE, J. A.
700 1 $aMUÑOZ, R.
700 1 $aNYTCH, C. J.
700 1 $aOLIVEIRA, A. A. de
700 1 $aPÉREZ-GARCÍA, E. A.
700 1 $aPRADO-JUNIOR, J.
700 1 $aRODRÍGUEZ-VELÁZQUES, J.
700 1 $aRUSCHEL, A. R.
700 1 $aSALGADO-NEGRET, B.
700 1 $aSCHIAVINI, I.
700 1 $aSWENSON, N. G.
700 1 $aTENORIO, E. A.
700 1 $aTHOMPSON, J.
700 1 $aTOLEDO, M.
700 1 $aURIARTE, M.
700 1 $aHOUT, P. van der
700 1 $aZIMMERMAN, J. K.
700 1 $aPEÑA-CLAROS, M.
773 $tGlobal Ecology and Biogeography$gv. 26, n. 12, p. 1423-1434, Dec. 2017.
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