| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Instrumentação. |
|
Data corrente: |
22/03/2022 |
|
Data da última atualização: |
23/01/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
SILVA, P. F. da; GOMES, B. F.; LOBO, C. M. S.; CARMO, M.; ROTH, C.; COLNAGO, L. A. |
|
Afiliação: |
LUIZ ALBERTO COLNAGO, CNPDIA. |
|
Título: |
Composite graphite epoxy electrodes for in situ electrochemistry coupling with high resolution NMR. |
|
Ano de publicação: |
2022 |
|
Fonte/Imprenta: |
ACS Omega 2022, v. 7, 2022. |
|
Páginas: |
4991-5000 |
|
DOI: |
https://doi.org/10.1021/acsomega.1c05823 |
|
Idioma: |
Inglês |
|
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 |
|
Palavras-Chave: |
Electrochemical reactions; Magnetoelectrolysis; Nuclear magnetic resonance. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/232809/1/P-Composite-Graphite8722Epoxy-Electrodes-for-In-Situ-Electrochemistry.pdf
|
|
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.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Instrumentação (CNPDIA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Soja. |
|
Data corrente: |
11/08/2011 |
|
Data da última atualização: |
29/04/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 1 |
|
Autoria: |
GOULART, M. M. P.; BUENO, A. de F.; BUENO, R. C. O. de F.; DINIZ, A. F. |
|
Afiliação: |
MARIA MIRMES PAIVA GOULART, Universidade de Rio Verde; ADENEY DE FREITAS BUENO, CNPSO; REGIANE CRISTINA OLIVEIRA DE FREITAS BUENO, Universidade de Rio Verde; ADENIL FERREIRA DINIZ, Universidade Estadual de Goiás. |
|
Título: |
Host preference of the egg parasitoids Telenomus remus and Trichogramma pretiosum in laboratory. |
|
Ano de publicação: |
2011 |
|
Fonte/Imprenta: |
Revista Brasileira de Entomologia, v. 55, n. 1, p. 129-133, mar. 2011. |
|
ISSN: |
1806-9665 |
|
Idioma: |
Inglês |
|
Conteúdo: |
ABSTRACT: Host preference of the egg parasitoids Telenomus remus and Trichogramma pretiosum in laboratory. This research aimed to evaluate the host preference of the egg parasitoids Telenomus remus and Trichogramma pretiosum. Trials were carried out in laboratory, under controlled environmental conditions (25 ± 2ºC temperature; 70 ± 10% RH; and 14 h photophase). The parasitoid searching behavior was evaluated based on the distribution (%) of eggs parasitized by each parasitoid, on egg masses of each host species. Results showed the host preference of T. remus by Spodoptera cosmioides eggs. T. pretiosum, reared in A. gemmatalis eggs, choose to parasitize always eggs of the host where the parasitoid had been reared. The egg preference was not observed when T. pretiosum was reared in S. frugiperda eggs. These results show that, in general, host preference of T. remus is less influenced by the host where it is developed than T. pretiosum. Host preference is an important parameter for biological control programs because more than one pest species may occur in the field, different from those where they were reared in the laboratory. RESUMO: Preferência hospedeira dos parasitoides de ovos Telenomus remus e Trichogramma pretiosum em laboratório. Este trabalho objetivou avaliar a preferência hospedeira dos parasitóides de ovos Telenomus remus e Trichogramma pretiosum. Os experimentos foram conduzidos em laboratório, sob condições controladas (temperatura de 25 ± 2ºC; umidade relativa de 70 ± 10%; e fotofase de 14 horas). O comportamento de busca dos parasitóides foi avaliado através da distribuição (%) de ovos parasitados por espécie de parasitóide, em massas de ovos de cada hospedeiro na combinação estudada. Os resultados mostraram que T. remus preferiu parasitar ovos de S. cosmioides. T. pretiosum, criados em ovos de A. gemmatalis, preferiu parasitar sempre os ovos dos hospedeiros nos quais foram multiplicados. Essa preferência não foi observada quando T. pretiosum foi multiplicado em ovos de S. frugiperda. Esses resultados mostram que, em geral, a preferência hospedeira de T. remus é menos influenciada em relação a T. pretiosum pelo hospedeiro em que o parasitóide se desenvolveu. A preferência hospedeira é um importante parâmetro a ser considerado em programas de controle biológico porque em condições de campo mais de uma espécie praga pode estar presente, diferente daquela em que foi criado em laboratório. MenosABSTRACT: Host preference of the egg parasitoids Telenomus remus and Trichogramma pretiosum in laboratory. This research aimed to evaluate the host preference of the egg parasitoids Telenomus remus and Trichogramma pretiosum. Trials were carried out in laboratory, under controlled environmental conditions (25 ± 2ºC temperature; 70 ± 10% RH; and 14 h photophase). The parasitoid searching behavior was evaluated based on the distribution (%) of eggs parasitized by each parasitoid, on egg masses of each host species. Results showed the host preference of T. remus by Spodoptera cosmioides eggs. T. pretiosum, reared in A. gemmatalis eggs, choose to parasitize always eggs of the host where the parasitoid had been reared. The egg preference was not observed when T. pretiosum was reared in S. frugiperda eggs. These results show that, in general, host preference of T. remus is less influenced by the host where it is developed than T. pretiosum. Host preference is an important parameter for biological control programs because more than one pest species may occur in the field, different from those where they were reared in the laboratory. RESUMO: Preferência hospedeira dos parasitoides de ovos Telenomus remus e Trichogramma pretiosum em laboratório. Este trabalho objetivou avaliar a preferência hospedeira dos parasitóides de ovos Telenomus remus e Trichogramma pretiosum. Os experimentos foram conduzidos em laboratório, sob condições controladas (temperatura de 25 ± 2ºC; umidade relativa... Mostrar Tudo |
|
Palavras-Chave: |
Inseto para controle integrado; Parasitoids insect eggs. |
|
Thesagro: |
Anticarsia gemmatalis; Controle biologico; Lagarta; Pupa. |
|
Thesaurus NAL: |
Biological control; Insect control; Telenomus; Trichogramma pretiosum. |
|
Categoria do assunto: |
O Insetos e Entomologia |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/39709/1/rev.bras.ento.55.1.129.pdf
|
|
Marc: |
LEADER 03358naa a2200289 a 4500
001 1897824
005 2022-04-29
008 2011 bl uuuu u00u1 u #d
022 $a1806-9665
100 1 $aGOULART, M. M. P.
245 $aHost preference of the egg parasitoids Telenomus remus and Trichogramma pretiosum in laboratory.$h[electronic resource]
260 $c2011
520 $aABSTRACT: Host preference of the egg parasitoids Telenomus remus and Trichogramma pretiosum in laboratory. This research aimed to evaluate the host preference of the egg parasitoids Telenomus remus and Trichogramma pretiosum. Trials were carried out in laboratory, under controlled environmental conditions (25 ± 2ºC temperature; 70 ± 10% RH; and 14 h photophase). The parasitoid searching behavior was evaluated based on the distribution (%) of eggs parasitized by each parasitoid, on egg masses of each host species. Results showed the host preference of T. remus by Spodoptera cosmioides eggs. T. pretiosum, reared in A. gemmatalis eggs, choose to parasitize always eggs of the host where the parasitoid had been reared. The egg preference was not observed when T. pretiosum was reared in S. frugiperda eggs. These results show that, in general, host preference of T. remus is less influenced by the host where it is developed than T. pretiosum. Host preference is an important parameter for biological control programs because more than one pest species may occur in the field, different from those where they were reared in the laboratory. RESUMO: Preferência hospedeira dos parasitoides de ovos Telenomus remus e Trichogramma pretiosum em laboratório. Este trabalho objetivou avaliar a preferência hospedeira dos parasitóides de ovos Telenomus remus e Trichogramma pretiosum. Os experimentos foram conduzidos em laboratório, sob condições controladas (temperatura de 25 ± 2ºC; umidade relativa de 70 ± 10%; e fotofase de 14 horas). O comportamento de busca dos parasitóides foi avaliado através da distribuição (%) de ovos parasitados por espécie de parasitóide, em massas de ovos de cada hospedeiro na combinação estudada. Os resultados mostraram que T. remus preferiu parasitar ovos de S. cosmioides. T. pretiosum, criados em ovos de A. gemmatalis, preferiu parasitar sempre os ovos dos hospedeiros nos quais foram multiplicados. Essa preferência não foi observada quando T. pretiosum foi multiplicado em ovos de S. frugiperda. Esses resultados mostram que, em geral, a preferência hospedeira de T. remus é menos influenciada em relação a T. pretiosum pelo hospedeiro em que o parasitóide se desenvolveu. A preferência hospedeira é um importante parâmetro a ser considerado em programas de controle biológico porque em condições de campo mais de uma espécie praga pode estar presente, diferente daquela em que foi criado em laboratório.
650 $aBiological control
650 $aInsect control
650 $aTelenomus
650 $aTrichogramma pretiosum
650 $aAnticarsia gemmatalis
650 $aControle biologico
650 $aLagarta
650 $aPupa
653 $aInseto para controle integrado
653 $aParasitoids insect eggs
700 1 $aBUENO, A. de F.
700 1 $aBUENO, R. C. O. de F.
700 1 $aDINIZ, A. F.
773 $tRevista Brasileira de Entomologia$gv. 55, n. 1, p. 129-133, mar. 2011.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Soja (CNPSO) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
