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Registro Completo |
Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
14/12/2015 |
Data da última atualização: |
20/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BONASORA, M. G.; POZZOBON, M. T.; HONFI, A. I.; RUA, G. H. |
Afiliação: |
MARISA G. BONASORA, Universidade de Buenos Aires; MARISA TONIOLO POZZOBON, CENARGEN; ANA I. HONFI, UNaM-CONICET; GABRIEL H. RUA, Universidade de Buenos Aires. |
Título: |
Paspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
Plant Systematics and Evolution, v. 301, n. 10, p. 2325-2339, 2015. |
DOI: |
10.1007/s00606-015-1231-0 |
Idioma: |
Inglês |
Palavras-Chave: |
Flora brasileira; Paspalum eucomum; Paspalum malmeanum; Paspalum stellatum. |
Thesagro: |
Citogenética. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/182272/1/Bonasora2015-Article-PaspalumSchessliiPoaceaePaspal.pdf
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Marc: |
LEADER 00720naa a2200217 a 4500 001 2031633 005 2023-03-20 008 2015 bl uuuu u00u1 u #d 024 7 $a10.1007/s00606-015-1231-0$2DOI 100 1 $aBONASORA, M. G. 245 $aPaspalum schesslii (Poaceae, Paspaleae), a new species from Mato Grosso (Brazil) with an unusual base chromosome number.$h[electronic resource] 260 $c2015 650 $aCitogenética 653 $aFlora brasileira 653 $aPaspalum eucomum 653 $aPaspalum malmeanum 653 $aPaspalum stellatum 700 1 $aPOZZOBON, M. T. 700 1 $aHONFI, A. I. 700 1 $aRUA, G. H. 773 $tPlant Systematics and Evolution$gv. 301, n. 10, p. 2325-2339, 2015.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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Registro Completo
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Semiárido; Embrapa Solos. |
Data corrente: |
05/01/2007 |
Data da última atualização: |
16/09/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
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. |
Afiliação: |
ETELVINO HENRIQUE NOVOTNY, CNPS; TONY JARBAS FERREIRA CUNHA, CPATSA; BEATA EMOKE MADARI, CNPAF; VINICIUS DE MELO BENITES, CNPS. |
Título: |
Studies of the compositions of humic acids from Amazonian Dark Earth soils. |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Environmental Science & Technology, v. 41, n. 2, p. 400-405, jan. 2007. |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Ácido húmico; Composição; Terra Preta de Índio. |
Thesagro: |
Solo; Solo Ácido; Solo Florestal. |
Thesaurus NAL: |
Amazonia; Anthropogenic soil types; Humic acids; Soil. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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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