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	Provedor de dados ArchiMer (1) Autor Sardessai, S (1) Wahidullah, S (1) Palavra-chave Acide humique (1) Arabian Sea (1) CP/MAS 13C RMN (1) CP/MAS C-13 NMR (1) Caractéristique structurale (1) Humic acids (1) Mer d'Arabie (1) Structural characteristics (1) Surficial sediment (1) Sédiment superficial (1) Mais... Tipo do documento Text (1) Ano 1998 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Structural characteristics of marine sedimentary humic acids by CP/MAS C-13 NMR spectroscopy ArchiMer Sardessai, S; Wahidullah, S. Humic acids from sediments of different depositional environments have been studied by solid-state C-13 NMR and the results compared with the traditional wet chemical analysis. Results obtained are well in agreement with the previous literature reports that the carboxyl content measured by NMR correlated better with the total acidity, as well as with the carboxyl content obtained by wet chemical analysis after correction for amino acid carboxyl is made (following hydrolysis of peptide bonds). There is a large discrepancy between the NMR and wet chemical measurements of phenolics. NMR spectra was also indicative of branched paraffinic structures in the humic acids from the Arabian Sea; the humic acids of sediments from estuarine and coastal areas of the Bay... Tipo: Text Palavras-chave: Acide humique; Caractéristique structurale; CP/MAS 13C RMN; Mer d'Arabie; Sédiment superficial; Humic acids; Structural characteristics; CP/MAS C-13 NMR; Arabian Sea; Surficial sediment. Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43657/43217.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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