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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
21/06/1995 |
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Data da última atualização: |
21/06/1995 |
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Autoria: |
CHEN, Y.; SENESI, N.; SCHNITZER, M. |
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Título: |
Chemical degradation of humic and fulvic acids extracted from Mediterranean soils. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Journal of Soil Science, v.29, p.350-359, Sept. 1978. |
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Idioma: |
Inglês |
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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. |
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Palavras-Chave: |
Degradacao quimica; Miditerraneo; Soil Mediterranean. |
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Thesagro: |
Solo. |
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Thesaurus Nal: |
chemical degradation; fulvic acids. |
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Categoria do assunto: |
-- |
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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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