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| Registros recuperados : 196 | |
| 17. |  | AGUIAR, F. M.; CARVALHO, M. R. M.; MICHEREFF, S. J.; REIS, A. Avaliação da agressividade de isolados de Fusarium oxysporum f. sp. vasinfectum. Tropical Plant Pathology, Brasília, DF, v. 35, p. S221, ago. 2010. Suplemento. Resumo 07.092. Trabalho apresentado no 43. Congresso Brasileiro de Fitopatologia, Cuiabá.| Biblioteca(s): Embrapa Hortaliças. |
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| Registros recuperados : 196 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
11/01/2011 |
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Data da última atualização: |
03/11/2021 |
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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: |
BYRNE, C. M. P.; HAYES, M. H. B.; KUMAR, R.; NOVOTNY, E. H.; LANIGAN, G.; RICHARDS, K. G.; FAY, D.; SIMPSON, A. J. |
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Afiliação: |
University of Limerick (UL), Ireland; University of Limerick (UL), Ireland; University of Toronto; ETELVINO HENRIQUE NOVOTNY, CNPS; Teagasc Environmental Research Centre; Teagasc Environmental Research Centre; Teagasc Environmental Research Centre; University of Toronto. |
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Título: |
Compositional changes in the hydrophobic acids fraction of drainage water from different land management practices. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Water Research, v. 44, n. 15, p. 4379-4390, Aug. 2010. |
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DOI: |
https://doi.org/10.1016/j.watres.2010.05.055 |
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Idioma: |
Inglês |
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Conteúdo: |
Dissolved organic matter (DOM) can play a key role in many environmental processes, including carbon cycling, nutrient transport and the fates of contaminants and of agrochemicals. Hydrophobic acids (Ho), the major components of the DOM, were recovered from the drainage waters from well-drained (WDS) and poorly-drained (PDS) Irish grassland soils in lysimeters, amended with N fertiliser (F) and with bovine urine (U) and were studied using 1D and 2D solution-state Nuclear Magnetic Resonance (NMR) spectroscopy. The Diffusion Edited (DE) 1H NMR spectra indicated that the Ho consisted largely of larger molecules, or of molecules that formed rigid aggregates, and the 1D and the 2D (Heteronuclear Multiple Quantum Coherence - HMQC, the Total Correlation Spectroscopy - TOCSY, and the Nuclear Overhauser Effect - NOESY) spectra indicated that the samples were composed of lignin residues, carbohydrates, protein/peptides, and aliphatic components derived from plant waxes/cuticular materials and from microbial lipids. The F amendments increased the concentrations of Ho in the waters by 1.5 and 2.5 times those in the controls in the cases of WDS and PDS, respectively. The lignin-derived components were increased by 50% and 300% in the cases of the Ho from the WDS and PDS, respectively. Applications of F + U decreased the losses of Ho, (compared to the F amendments alone) and very significantly decreased those of the lignin-derived materials, indicating that enhanced microbial activity from U gave rise to enhanced metabolism of the Ho components, and especially of lignin. In contrast the less biodegradable aliphatic components containing cuticular materials increased as the result of applications of F + U. This study helps our understanding of how management practices influence the movement of C between terrestrial and aquatic environments. MenosDissolved organic matter (DOM) can play a key role in many environmental processes, including carbon cycling, nutrient transport and the fates of contaminants and of agrochemicals. Hydrophobic acids (Ho), the major components of the DOM, were recovered from the drainage waters from well-drained (WDS) and poorly-drained (PDS) Irish grassland soils in lysimeters, amended with N fertiliser (F) and with bovine urine (U) and were studied using 1D and 2D solution-state Nuclear Magnetic Resonance (NMR) spectroscopy. The Diffusion Edited (DE) 1H NMR spectra indicated that the Ho consisted largely of larger molecules, or of molecules that formed rigid aggregates, and the 1D and the 2D (Heteronuclear Multiple Quantum Coherence - HMQC, the Total Correlation Spectroscopy - TOCSY, and the Nuclear Overhauser Effect - NOESY) spectra indicated that the samples were composed of lignin residues, carbohydrates, protein/peptides, and aliphatic components derived from plant waxes/cuticular materials and from microbial lipids. The F amendments increased the concentrations of Ho in the waters by 1.5 and 2.5 times those in the controls in the cases of WDS and PDS, respectively. The lignin-derived components were increased by 50% and 300% in the cases of the Ho from the WDS and PDS, respectively. Applications of F + U decreased the losses of Ho, (compared to the F amendments alone) and very significantly decreased those of the lignin-derived materials, indicating that enhanced microbial activity fro... Mostrar Tudo |
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Palavras-Chave: |
Grassland; Hydrophobic acids. |
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Thesaurus NAL: |
dissolved organic matter. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02646naa a2200253 a 4500
001 1872601
005 2021-11-03
008 2010 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.watres.2010.05.055$2DOI
100 1 $aBYRNE, C. M. P.
245 $aCompositional changes in the hydrophobic acids fraction of drainage water from different land management practices.$h[electronic resource]
260 $c2010
520 $aDissolved organic matter (DOM) can play a key role in many environmental processes, including carbon cycling, nutrient transport and the fates of contaminants and of agrochemicals. Hydrophobic acids (Ho), the major components of the DOM, were recovered from the drainage waters from well-drained (WDS) and poorly-drained (PDS) Irish grassland soils in lysimeters, amended with N fertiliser (F) and with bovine urine (U) and were studied using 1D and 2D solution-state Nuclear Magnetic Resonance (NMR) spectroscopy. The Diffusion Edited (DE) 1H NMR spectra indicated that the Ho consisted largely of larger molecules, or of molecules that formed rigid aggregates, and the 1D and the 2D (Heteronuclear Multiple Quantum Coherence - HMQC, the Total Correlation Spectroscopy - TOCSY, and the Nuclear Overhauser Effect - NOESY) spectra indicated that the samples were composed of lignin residues, carbohydrates, protein/peptides, and aliphatic components derived from plant waxes/cuticular materials and from microbial lipids. The F amendments increased the concentrations of Ho in the waters by 1.5 and 2.5 times those in the controls in the cases of WDS and PDS, respectively. The lignin-derived components were increased by 50% and 300% in the cases of the Ho from the WDS and PDS, respectively. Applications of F + U decreased the losses of Ho, (compared to the F amendments alone) and very significantly decreased those of the lignin-derived materials, indicating that enhanced microbial activity from U gave rise to enhanced metabolism of the Ho components, and especially of lignin. In contrast the less biodegradable aliphatic components containing cuticular materials increased as the result of applications of F + U. This study helps our understanding of how management practices influence the movement of C between terrestrial and aquatic environments.
650 $adissolved organic matter
653 $aGrassland
653 $aHydrophobic acids
700 1 $aHAYES, M. H. B.
700 1 $aKUMAR, R.
700 1 $aNOVOTNY, E. H.
700 1 $aLANIGAN, G.
700 1 $aRICHARDS, K. G.
700 1 $aFAY, D.
700 1 $aSIMPSON, A. J.
773 $tWater Research$gv. 44, n. 15, p. 4379-4390, Aug. 2010.
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