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Registro Completo |
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
21/06/1995 |
Data da última atualização: |
21/06/1995 |
Autoria: |
CHEN, Y.; SENESI, N.; SCHNITZER, M. |
Título: |
Chemical degradation of humic and fulvic acids extracted from Mediterranean soils. |
Ano de publicação: |
1978 |
Fonte/Imprenta: |
Journal of Soil Science, v.29, p.350-359, Sept. 1978. |
Idioma: |
Inglês |
Conteúdo: |
Humic and fulvic acids were extracted from two Israeli and four Italian soils and oxidized with alkaline peramanganate solution after methylation. Following oxidation, the degradation products were separated by solvent extraction and chromatographic methods and identified by gas chromatography - mass expectrometry. Major oxidation products were aliphatic, phenolic and benzenecarboxylic acids. In toto, 33 oxidation products were identified. These were essentially the same compounds as those produced by the permanganate oxidation of methylated humic and fulvic acids extracted from soils formed under widely differing climate and geologic conditions, except that yields of phenologic acids from Mediterranean humic and fulvic acids were lower than those produced under similar conditions from humic materials extracted from other soils. The information provided by chemical degradation suggests that humic and fulvic acids from widely differing soils have similar chemical structures. |
Palavras-Chave: |
Degradacao quimica; Miditerraneo; Soil Mediterranean. |
Thesagro: |
Solo. |
Thesaurus Nal: |
chemical degradation; fulvic acids. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01585naa a2200217 a 4500 001 1784673 005 1995-06-21 008 1978 bl --- 0-- u #d 100 1 $aCHEN, Y. 245 $aChemical degradation of humic and fulvic acids extracted from Mediterranean soils. 260 $c1978 520 $aHumic and fulvic acids were extracted from two Israeli and four Italian soils and oxidized with alkaline peramanganate solution after methylation. Following oxidation, the degradation products were separated by solvent extraction and chromatographic methods and identified by gas chromatography - mass expectrometry. Major oxidation products were aliphatic, phenolic and benzenecarboxylic acids. In toto, 33 oxidation products were identified. These were essentially the same compounds as those produced by the permanganate oxidation of methylated humic and fulvic acids extracted from soils formed under widely differing climate and geologic conditions, except that yields of phenologic acids from Mediterranean humic and fulvic acids were lower than those produced under similar conditions from humic materials extracted from other soils. The information provided by chemical degradation suggests that humic and fulvic acids from widely differing soils have similar chemical structures. 650 $achemical degradation 650 $afulvic acids 650 $aSolo 653 $aDegradacao quimica 653 $aMiditerraneo 653 $aSoil Mediterranean 700 1 $aSENESI, N. 700 1 $aSCHNITZER, M. 773 $tJournal of Soil Science$gv.29, p.350-359, Sept. 1978.
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Embrapa Pantanal (CPAP) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
25/08/1999 |
Data da última atualização: |
25/08/1999 |
Autoria: |
PARRON, L. M.; TSUBOI, L. A. |
Título: |
Crescimento inicial de Rapanea guianensis Aubl. em substratos com micorrizas arbusculares. |
Ano de publicação: |
1999 |
Fonte/Imprenta: |
In: CONGRESSO E EXPOSICAO INTERNACIONAL SOBRE FLORESTAS, 5., 1999, Curitiba, PR. FOREST 99. Rio de Janeiro: BIOSFERA, 1999. |
Páginas: |
nao paginado. |
Idioma: |
Português |
Palavras-Chave: |
Growth; Rapanea guianensis. |
Thesagro: |
Cerrado; Crescimento; Micorriza. |
Thesaurus NAL: |
mycorrhizae. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00644naa a2200205 a 4500 001 1545609 005 1999-08-25 008 1999 bl uuuu u00u1 u #d 100 1 $aPARRON, L. M. 245 $aCrescimento inicial de Rapanea guianensis Aubl. em substratos com micorrizas arbusculares. 260 $c1999 300 $anao paginado. 650 $amycorrhizae 650 $aCerrado 650 $aCrescimento 650 $aMicorriza 653 $aGrowth 653 $aRapanea guianensis 700 1 $aTSUBOI, L. A. 773 $tIn: CONGRESSO E EXPOSICAO INTERNACIONAL SOBRE FLORESTAS, 5., 1999, Curitiba, PR. FOREST 99. Rio de Janeiro: BIOSFERA, 1999.
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