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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
04/12/2012 |
Data da última atualização: |
04/12/2012 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
VILELA, M. S.; MOREIRA, H. DE S. M.; PEIXOTO, J. R.; JUNQUEIRA, N. T. V.; NUNES, M. DE S. |
Afiliação: |
MICHELLE SOUZA VILELA, UNB; HUGO DE SOUZA MOTTA MOREIRA, UNB; JOSÉ RICARDO PEIXOTO, UNB; NILTON TADEU VILELA JUNQUEIRA, CPAC; MONISE DE SOUZA NUNES, UNB. |
Título: |
Reação de progênies de maracujazeiro azedo à verrugose no Distrito Federal. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 22., 2012, Bento Gonçalves. Anais... Bento Gonçalves: SBF, 2012. |
Idioma: |
Português |
Palavras-Chave: |
Cladosporium spp; Maracujazeiro azedo; Passiflora edullis. |
Thesagro: |
Cerrado; Doença de planta; Fungo; Maracujá. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/71371/1/CD416Nilton13.pdf
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Marc: |
LEADER 00741nam a2200229 a 4500 001 1941171 005 2012-12-04 008 2012 bl uuuu u00u1 u #d 100 1 $aVILELA, M. S. 245 $aReação de progênies de maracujazeiro azedo à verrugose no Distrito Federal.$h[electronic resource] 260 $aIn: CONGRESSO BRASILEIRO DE FRUTICULTURA, 22., 2012, Bento Gonçalves. Anais... Bento Gonçalves: SBF$c2012 650 $aCerrado 650 $aDoença de planta 650 $aFungo 650 $aMaracujá 653 $aCladosporium spp 653 $aMaracujazeiro azedo 653 $aPassiflora edullis 700 1 $aMOREIRA, H. DE S. M. 700 1 $aPEIXOTO, J. R. 700 1 $aJUNQUEIRA, N. T. V. 700 1 $aNUNES, M. DE S.
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Embrapa Cerrados (CPAC) |
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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. |
Registro Completo
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
12/04/2022 |
Data da última atualização: |
12/04/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
BRAVO, C.; TONIOLO, R.; PELLEGRINI, E.; MILLO, C.; COVELLI, S.; CONTIN, M.; MARTIN NETO, L.; DE NOBILI, M. |
Afiliação: |
LADISLAU MARTIN NETO, CNPDIA. |
Título: |
Electron donating properties of humic acids in saltmarsh soils reflect soil geochemical characteristics. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Geoderma, v. 419, 115872, 2022. |
Páginas: |
1 - 11 |
ISSN: |
0016-7061 |
DOI: |
https://doi.org/10.1016/j.geoderma.2022.115872 |
Idioma: |
Inglês |
Conteúdo: |
In saltmarsh soils, humic acids (HA) are involved in geochemically important redox processes. The electron donating capacity (EDC) of HA depends on their molecular structure, but also reflects the intensity of biological reduction in tidal environments. We examined twelve soils in three saltmarshes located along a geographical gradient and applied a specific sequential extraction procedure for the isolation of HA fractions bound (BHA) or not (FHA) to the mineral matrix by Ca2+ bridges, and investigated the relationships of their properties, in particular their EDC, with the biogeochemical characteristics of the soils. Spectroscopic assessment was carried out by UV–vis, FTIR and 13C NMR, quantification and characterization of radicals was performed by electron paramagnetic resonance (EPR) spectroscopy. The EDC was determined by using the 2,2′ -azinobis-(3-ethylbenzothiazolinesulfonic acid) (ABTS) decolorization assay and experimental data were fitted to a biphasic model to calculate the contributions of the fast and slow reactions to electron transfer. The results confirmed that the two HA fractions possess different structural characteristics and that BHA present higher EDC values compared to FHA. The EDC of both fractions is strongly related to the geochemical characteristics of soils, and represents an easily measured and highly informative parameter to understand mechanisms affecting redox processes in transitional environments. |
Palavras-Chave: |
ABTS; EDC; Redox. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02219naa a2200277 a 4500 001 2142167 005 2022-04-12 008 2022 bl uuuu u00u1 u #d 022 $a0016-7061 024 7 $ahttps://doi.org/10.1016/j.geoderma.2022.115872$2DOI 100 1 $aBRAVO, C. 245 $aElectron donating properties of humic acids in saltmarsh soils reflect soil geochemical characteristics.$h[electronic resource] 260 $c2022 300 $a1 - 11 520 $aIn saltmarsh soils, humic acids (HA) are involved in geochemically important redox processes. The electron donating capacity (EDC) of HA depends on their molecular structure, but also reflects the intensity of biological reduction in tidal environments. We examined twelve soils in three saltmarshes located along a geographical gradient and applied a specific sequential extraction procedure for the isolation of HA fractions bound (BHA) or not (FHA) to the mineral matrix by Ca2+ bridges, and investigated the relationships of their properties, in particular their EDC, with the biogeochemical characteristics of the soils. Spectroscopic assessment was carried out by UV–vis, FTIR and 13C NMR, quantification and characterization of radicals was performed by electron paramagnetic resonance (EPR) spectroscopy. The EDC was determined by using the 2,2′ -azinobis-(3-ethylbenzothiazolinesulfonic acid) (ABTS) decolorization assay and experimental data were fitted to a biphasic model to calculate the contributions of the fast and slow reactions to electron transfer. The results confirmed that the two HA fractions possess different structural characteristics and that BHA present higher EDC values compared to FHA. The EDC of both fractions is strongly related to the geochemical characteristics of soils, and represents an easily measured and highly informative parameter to understand mechanisms affecting redox processes in transitional environments. 653 $aABTS 653 $aEDC 653 $aRedox 700 1 $aTONIOLO, R. 700 1 $aPELLEGRINI, E. 700 1 $aMILLO, C. 700 1 $aCOVELLI, S. 700 1 $aCONTIN, M. 700 1 $aMARTIN NETO, L. 700 1 $aDE NOBILI, M. 773 $tGeoderma$gv. 419, 115872, 2022.
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