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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Pantanal. |
Data corrente: |
25/06/1992 |
Data da última atualização: |
03/10/2023 |
Autoria: |
FERREIRA, M. B.; LACA-BUENDIA, J. P.; CUNHA, L. H. de S. |
Título: |
Catálogo ilustrado de sementes e fruto/sementes, de plantas daninhas ocorrentes em pastagens, no Estado de Minas Gerais e, herbicidas utilizados para seu controle. |
Ano de publicação: |
1981 |
Fonte/Imprenta: |
Belo Horizonte: EPAMIG, 1981. |
Páginas: |
131 p. |
Idioma: |
Português |
Conteúdo: |
Material e metodos; Consideracoes gerais sobre a semente; Quadro I - Relacao de especies daninhas estudadas; Familias infocadas e caracteristicas morfologicas externas de suas sementes; Relacao das pranchas apresentadas; Controle das plantas daninhas em pastagens; Quadro II - Herbicidas registrados para o controle de plantas daninhas em pastagens. |
Palavras-Chave: |
Brasil; Catalogo; Catalogue; Minas Gerais; Seed. |
Thesagro: |
Erva Daninha; Fruto; Herbicida; Semente. |
Thesaurus Nal: |
Brazil. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01088nam a2200265 a 4500 001 1373756 005 2023-10-03 008 1981 bl uuuu u0uu1 u #d 100 1 $aFERREIRA, M. B. 245 $aCatálogo ilustrado de sementes e fruto/sementes, de plantas daninhas ocorrentes em pastagens, no Estado de Minas Gerais e, herbicidas utilizados para seu controle. 260 $aBelo Horizonte: EPAMIG$c1981 300 $a131 p. 520 $aMaterial e metodos; Consideracoes gerais sobre a semente; Quadro I - Relacao de especies daninhas estudadas; Familias infocadas e caracteristicas morfologicas externas de suas sementes; Relacao das pranchas apresentadas; Controle das plantas daninhas em pastagens; Quadro II - Herbicidas registrados para o controle de plantas daninhas em pastagens. 650 $aBrazil 650 $aErva Daninha 650 $aFruto 650 $aHerbicida 650 $aSemente 653 $aBrasil 653 $aCatalogo 653 $aCatalogue 653 $aMinas Gerais 653 $aSeed 700 1 $aLACA-BUENDIA, J. P. 700 1 $aCUNHA, L. H. de S.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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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
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
09/12/2008 |
Data da última atualização: |
27/10/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
SONG, G.; NOVOTNY, E. H.; SIMPSON, A. J.; CLAPP, C. E.; HAYES, M. H. B. |
Afiliação: |
G. SONG, University of Limerick; ETELVINO HENRIQUE NOVOTNY, CNPS; A. J. SIMPSON, University of Toronto; C. E. CLAPP, University of Minnesota; M. H. B. HAYES, University of Limerick. |
Título: |
Sequential exhaustive extraction of a Mollisol soil, and characterizations of humic components, including humin, by solid and solution state NMR. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
European Journal of Soil Science, Oxford, v. 59, n. 3, p. 505-516, Jun. 2008. |
DOI: |
https://doi.org/10.1111/j.1365-2389.2007.01006.x |
Idioma: |
Inglês |
Conteúdo: |
A comprehensive sequential extraction procedure was applied to isolate soil organic components using aqueous solvents at different pH values, base plus urea (base-urea), and finally dimethylsulfoxide (DMSO) plus concentrated H2SO4 (DMSO-acid) for the humin-enriched clay separates. The extracts from base-urea and DMSO-acid would be regarded as 'humin' in the classical definitions. The fractions isolated from aqueous base, base-urea and DMSO-acid were characterized by solid and solution state NMR spectroscopy. The base-urea solvent system isolated ca. 10% (by mass) additional humic substances. The combined base-urea and DMSO-acid solvents isolated ca. 93% of total organic carbon from the humin-enriched fine clay fraction (<2 ?m). Characterization of the humic fractions by solid-state NMR spectroscopy showed that oxidized char materials were concentrated in humic acids isolated at pH 7, and in the base-urea extract. Lignin-derived materials were in considerable abundance in the humic acids isolated at pH 12.6. Only very small amounts of char-derived structures were contained in the fulvic acids and fulvic acids-like material isolated from the base-urea solvent. After extraction with base-urea, the 0.5 m NaOH extract from the humin-enriched clay was predominantly composed of aliphatic hydrocarbon groups, and with lesser amounts of aromatic carbon (probably including some char material), and carbohydrates and peptides. From the combination of solid and solution-state NMR spectroscopy, it is clear that the major components of humin materials, from the DMSO-acid solvent, after the exhaustive extraction sequence, were composed of microbial and plant derived components, mainly long-chain aliphatic species (including fatty acids/ester, waxes, lipids and cuticular material), carbohydrate, peptides/proteins, lignin derivatives, lipoprotein and peptidoglycan (major structural components in bacteria cell walls). Black carbon or char materials were enriched in humic acids isolated at pH 7 and humic acids-like material isolated in the base-urea medium, indicating that urea can liberate char-derived material hydrogen bonded or trapped within the humin matrix. MenosA comprehensive sequential extraction procedure was applied to isolate soil organic components using aqueous solvents at different pH values, base plus urea (base-urea), and finally dimethylsulfoxide (DMSO) plus concentrated H2SO4 (DMSO-acid) for the humin-enriched clay separates. The extracts from base-urea and DMSO-acid would be regarded as 'humin' in the classical definitions. The fractions isolated from aqueous base, base-urea and DMSO-acid were characterized by solid and solution state NMR spectroscopy. The base-urea solvent system isolated ca. 10% (by mass) additional humic substances. The combined base-urea and DMSO-acid solvents isolated ca. 93% of total organic carbon from the humin-enriched fine clay fraction (<2 ?m). Characterization of the humic fractions by solid-state NMR spectroscopy showed that oxidized char materials were concentrated in humic acids isolated at pH 7, and in the base-urea extract. Lignin-derived materials were in considerable abundance in the humic acids isolated at pH 12.6. Only very small amounts of char-derived structures were contained in the fulvic acids and fulvic acids-like material isolated from the base-urea solvent. After extraction with base-urea, the 0.5 m NaOH extract from the humin-enriched clay was predominantly composed of aliphatic hydrocarbon groups, and with lesser amounts of aromatic carbon (probably including some char material), and carbohydrates and peptides. From the combination of solid and solution-state NMR spectros... Mostrar Tudo |
Palavras-Chave: |
Extração sequencial; Solo Mollisol; Substâncias húmicas. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02945naa a2200217 a 4500 001 1339738 005 2021-10-27 008 2008 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1111/j.1365-2389.2007.01006.x$2DOI 100 1 $aSONG, G. 245 $aSequential exhaustive extraction of a Mollisol soil, and characterizations of humic components, including humin, by solid and solution state NMR.$h[electronic resource] 260 $c2008 520 $aA comprehensive sequential extraction procedure was applied to isolate soil organic components using aqueous solvents at different pH values, base plus urea (base-urea), and finally dimethylsulfoxide (DMSO) plus concentrated H2SO4 (DMSO-acid) for the humin-enriched clay separates. The extracts from base-urea and DMSO-acid would be regarded as 'humin' in the classical definitions. The fractions isolated from aqueous base, base-urea and DMSO-acid were characterized by solid and solution state NMR spectroscopy. The base-urea solvent system isolated ca. 10% (by mass) additional humic substances. The combined base-urea and DMSO-acid solvents isolated ca. 93% of total organic carbon from the humin-enriched fine clay fraction (<2 ?m). Characterization of the humic fractions by solid-state NMR spectroscopy showed that oxidized char materials were concentrated in humic acids isolated at pH 7, and in the base-urea extract. Lignin-derived materials were in considerable abundance in the humic acids isolated at pH 12.6. Only very small amounts of char-derived structures were contained in the fulvic acids and fulvic acids-like material isolated from the base-urea solvent. After extraction with base-urea, the 0.5 m NaOH extract from the humin-enriched clay was predominantly composed of aliphatic hydrocarbon groups, and with lesser amounts of aromatic carbon (probably including some char material), and carbohydrates and peptides. From the combination of solid and solution-state NMR spectroscopy, it is clear that the major components of humin materials, from the DMSO-acid solvent, after the exhaustive extraction sequence, were composed of microbial and plant derived components, mainly long-chain aliphatic species (including fatty acids/ester, waxes, lipids and cuticular material), carbohydrate, peptides/proteins, lignin derivatives, lipoprotein and peptidoglycan (major structural components in bacteria cell walls). Black carbon or char materials were enriched in humic acids isolated at pH 7 and humic acids-like material isolated in the base-urea medium, indicating that urea can liberate char-derived material hydrogen bonded or trapped within the humin matrix. 653 $aExtração sequencial 653 $aSolo Mollisol 653 $aSubstâncias húmicas 700 1 $aNOVOTNY, E. H. 700 1 $aSIMPSON, A. J. 700 1 $aCLAPP, C. E. 700 1 $aHAYES, M. H. B. 773 $tEuropean Journal of Soil Science, Oxford$gv. 59, n. 3, p. 505-516, Jun. 2008.
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