Data/hora: 21/06/2024 23:35:16

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: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (28419-1) - ADD - SP - -- - SP0288 -  - 0288 - DIS