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| Registros recuperados : 50 | |
| 21. |  | NOVOTNY, E. H.; BONAGAMBA, T. J.; AZEVEDO, E. R. de; HAYES, M. H. B. Solid-state 13C nuclear magnetic resonance characterisation of humic acids extracted from amazonian dark earths (terra preta de índio). In: WOODS, W. I.; TEIXEIRA, W. G.; LEHMANN, J.; STEINER, C.; WINKLERPRINS, A.; REBELLATO, L. (ed.). Amazonian dark earths: Wim Sombroek's vision. Berlin: Springer, 2009. cap. 21, p. 373-391.| Biblioteca(s): Embrapa Solos. |
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| 23. | | NOVOTNY, E. H.; KNICKER, H.; MARTIN NETO, L.; AZEREDO, R. B. V.; HAYES, M. H. B. Effect of residual vanadyl ions on the spectroscopic analysis of humic acids: a multivariate approach. European Journal of Soil Science, Oxford, v. 59, n. 3, p. 439-444, Jun. 2008.| Biblioteca(s): Embrapa Solos. |
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| 25. | | CLAPP, C. E.; HAYES, M. H. B.; SENESI, N.; BLOOM, P. R.; JARDINE, P. M. (ed.). Humic substances and chemical contaminants. Madison, WI : Soil Science Society of America, 2001. 502 p. Humic substances and chemical contaminants : proceedings of a workshop and symposium cosponsored by the International Humic Substances Society, Divisions S-2, S-1, S-3, S-4, and S-11 of the Soil Science Society of America, and Division...| Biblioteca(s): Embrapa Instrumentação. |
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| 29. | | SONG, G.; NOVOTNY, E. H.; HAYES, M. H. B.; AZEVEDO, E. R. de; BONAGAMBA, T. J. Char and humin fractions in Amazonian dark earths. In: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 14., 2008, Saint Petersburg. From molecular understanding to innovative applications of humic substances: proceedings... Moscow: Lomonosov Moscow State University, 2008. v. 1, p. 311-314.| Biblioteca(s): Embrapa Solos. |
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| 31. | | MELLIGAN, F.; AUCCAISE, R.; NOVOTNY, E. H.; LEAHY, J. J.; HAYES, M. H. B.; KWAPINSKI, W. Pressurised pyrolysis of Miscanthus using a fixed bed reactor. Bioresource Technology, v. 102, n. 3, p. 3466-3470, Feb. 2011.| Biblioteca(s): Embrapa Solos. |
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| 33. | | NOVOTNY, E. H.; HAYES, M. H. B.; SONG, G.; AZEVEDO, E. R. de; BONAGAMBA, T. Extraction and characterisation of humin fraction from Amazonian anthropogenic dark earth soils ("Terra Preta de Indios"). In: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 14., 2008, Saint Petersburg. From molecular understanding to innovative applications of humic substances: proceedings... Moscow: Lomonosov Moscow State University, 2008. v. 1, p. 105-108.| Biblioteca(s): Embrapa Solos. |
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| 34. | | MCINERNEV, R.; STUART, J.; NOVOTNY, E. H.; HAYES, M. H. B.; YOUNG, K. Extraction and characterization of organic fractions isolated from a China Ball Clay quarried in Devon Sout West England. In: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 14., 2008, Saint Petersburg. From molecular understanding to innovative applications of humic substances: proceedings... Moscow: Lomonosov Moscow State University, 2008. v. 2, p. 567-570.| Biblioteca(s): Embrapa Solos. |
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| 35. | | SIMPSON, A. J.; SONG, G.; SMITH, E.; LAM, B.; NOVOTNY, E. H.; HAYES, M. H. B. Unraveling the structural components of soil humin by use of solution-state nuclear magnetic resonance spectroscopy. Environmental Science & Technology, v. 41, n. 3, p. 876-883, Feb. 2007.| Biblioteca(s): Embrapa Solos. |
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| 38. | | MELLIGAN, F.; DUSSAN, K.; AUCCAISE, R.; NOVOTNY, E. H.; LEAHY, E. H.; HAYES, M. H. B.; KWAPINSKI, W. Characterisation of the products from pyrolysis of residues after acid hydrolysis of miscanthus. Bioresource Technology, v. 108, p. 258-263, Mar. 2012.| Biblioteca(s): Embrapa Solos. |
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| 39. | | KWAPINSKIK, W.; WOLFRAM, P.; BYRNE, C.; MELLIGAN, F.; NOVOTNY, E. H.; LEAHY, J. J.; HAYES, M. H. B. Properties of biochar produced from Miscanthus x giganteus and its influence the growth of maize (Zea mays L.). In: MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 15., 2010, Tenerife. Proceedings... Tenerife: IHSS, 2010. v. 1, p. 95-98.| Biblioteca(s): Embrapa Solos. |
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| Registros recuperados : 50 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Semiárido; Embrapa Solos. |
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Data corrente: |
05/01/2007 |
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Data da última atualização: |
16/09/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
NOVOTNY, E. H.; AZEVEDO, E. R. de; BONAGAMBA, T. J.; CUNHA, T. J. F.; MADARI, B. E.; BENITES, V. de M.; HAYES, M. H. B. |
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Afiliação: |
ETELVINO HENRIQUE NOVOTNY, CNPS; TONY JARBAS FERREIRA CUNHA, CPATSA; BEATA EMOKE MADARI, CNPAF; VINICIUS DE MELO BENITES, CNPS. |
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Título: |
Studies of the compositions of humic acids from Amazonian Dark Earth soils. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Environmental Science & Technology, v. 41, n. 2, p. 400-405, jan. 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
The compositions of humic acids (HAs) isolated from cultivated and forested "Terra Preta de Índio" or Amazonian Dark Earth soils (anthropogenic soils) were compared with those from adjacent non-anthropogenic soils (control soils) using elemental and thermogravimetric analyses, and a variety of solid-state nuclear magnetic resonance techniques. The thermogravimetric index, which indicates the molecular thermal resistance, was greater for the anthropogenic soils than for the control soils suggesting polycyclic aromatic components in the former. The cultivated anthropogenic soils were more enriched in C and depleted in H than the anthropogenic soils under forest, as the result of the selective degradation of aliphatic structures and the possible enrichment of H-deficient condensed aromatic structures. The combination of variable amplitude cross-polarization (VACP) and chemical shift anisotropy with total suppression of spinning sidebands experiments with composite pi pulses could be used to quantify the aromaticity of the HAs from the anthropogenic soils. From principal component analysis, using the VACP spectra, it was possible to separate the different constituents of the HAs, such as the carboxylated aromatic structures, from the anthropogenic soils and plant derived compounds. The data show that the HAs from anthropogenic soils have high contents of aryl and ionisable oxygenated functional groups, and the major functionalities from adjacent control soils are oxygenated functional groups from labile structures (carbohydrates, peptides, and with evidence for lignin structures). The anthropogenic soils HAs can be considered to be more recalcitrant, and with more stable reactive functional groups which may, in part, explain their more sustainable fertility due to the organic matter contribution to the soil cation exchange capacity. MenosThe compositions of humic acids (HAs) isolated from cultivated and forested "Terra Preta de Índio" or Amazonian Dark Earth soils (anthropogenic soils) were compared with those from adjacent non-anthropogenic soils (control soils) using elemental and thermogravimetric analyses, and a variety of solid-state nuclear magnetic resonance techniques. The thermogravimetric index, which indicates the molecular thermal resistance, was greater for the anthropogenic soils than for the control soils suggesting polycyclic aromatic components in the former. The cultivated anthropogenic soils were more enriched in C and depleted in H than the anthropogenic soils under forest, as the result of the selective degradation of aliphatic structures and the possible enrichment of H-deficient condensed aromatic structures. The combination of variable amplitude cross-polarization (VACP) and chemical shift anisotropy with total suppression of spinning sidebands experiments with composite pi pulses could be used to quantify the aromaticity of the HAs from the anthropogenic soils. From principal component analysis, using the VACP spectra, it was possible to separate the different constituents of the HAs, such as the carboxylated aromatic structures, from the anthropogenic soils and plant derived compounds. The data show that the HAs from anthropogenic soils have high contents of aryl and ionisable oxygenated functional groups, and the major functionalities from adjacent control soils are oxygenated func... Mostrar Tudo |
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Palavras-Chave: |
Ácido húmico; Composição; Terra Preta de Índio. |
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Thesagro: |
Solo; Solo Ácido; Solo Florestal. |
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Thesaurus NAL: |
Amazonia; Anthropogenic soil types; Humic acids; Soil. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/177112/1/Separata-00453.pdf
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Marc: |
LEADER 02743naa a2200313 a 4500
001 1158055
005 2021-09-16
008 2007 bl uuuu u00u1 u #d
100 1 $aNOVOTNY, E. H.
245 $aStudies of the compositions of humic acids from Amazonian Dark Earth soils.$h[electronic resource]
260 $c2007
520 $aThe compositions of humic acids (HAs) isolated from cultivated and forested "Terra Preta de Índio" or Amazonian Dark Earth soils (anthropogenic soils) were compared with those from adjacent non-anthropogenic soils (control soils) using elemental and thermogravimetric analyses, and a variety of solid-state nuclear magnetic resonance techniques. The thermogravimetric index, which indicates the molecular thermal resistance, was greater for the anthropogenic soils than for the control soils suggesting polycyclic aromatic components in the former. The cultivated anthropogenic soils were more enriched in C and depleted in H than the anthropogenic soils under forest, as the result of the selective degradation of aliphatic structures and the possible enrichment of H-deficient condensed aromatic structures. The combination of variable amplitude cross-polarization (VACP) and chemical shift anisotropy with total suppression of spinning sidebands experiments with composite pi pulses could be used to quantify the aromaticity of the HAs from the anthropogenic soils. From principal component analysis, using the VACP spectra, it was possible to separate the different constituents of the HAs, such as the carboxylated aromatic structures, from the anthropogenic soils and plant derived compounds. The data show that the HAs from anthropogenic soils have high contents of aryl and ionisable oxygenated functional groups, and the major functionalities from adjacent control soils are oxygenated functional groups from labile structures (carbohydrates, peptides, and with evidence for lignin structures). The anthropogenic soils HAs can be considered to be more recalcitrant, and with more stable reactive functional groups which may, in part, explain their more sustainable fertility due to the organic matter contribution to the soil cation exchange capacity.
650 $aAmazonia
650 $aAnthropogenic soil types
650 $aHumic acids
650 $aSoil
650 $aSolo
650 $aSolo Ácido
650 $aSolo Florestal
653 $aÁcido húmico
653 $aComposição
653 $aTerra Preta de Índio
700 1 $aAZEVEDO, E. R. de
700 1 $aBONAGAMBA, T. J.
700 1 $aCUNHA, T. J. F.
700 1 $aMADARI, B. E.
700 1 $aBENITES, V. de M.
700 1 $aHAYES, M. H. B.
773 $tEnvironmental Science & Technology$gv. 41, n. 2, p. 400-405, jan. 2007.
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Embrapa Semiárido (CPATSA) |
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