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dc.contributor.authorSierra, MMD-
dc.contributor.authorGiovanela, M.-
dc.contributor.authorParlanti, E.-
dc.contributor.authorEsteves, VI-
dc.contributor.authorDuarte, A. C.-
dc.contributor.authorFransozo, A.-
dc.contributor.authorSoriano-Sierra, E. J.-
dc.identifier.citationJournal of Coastal Research. Lawrence: Coastal Education & Research Foundation, p. 370-382, 2005.-
dc.description.abstractElemental composition and spectroscopic properties (FT-IR and CP/MAS C-13-NMR) of sedimentary humic substances (HS) from aquatic subtropical environments (a lake, an estuary and two marine sites) are investigated. Humic acids (HA) are relatively richer in nitrogen and in aliphatic chains than fulvic acids (FA) from the same sediments. Conversely, FA are richer in carboxylic groups and in ring polysaccharides than HA. Nitrogen is mostly present as amide groups and for lake and marine HS the FT-IR peaks around 1640 cm(-1) and 1540 cm(-1) identify polypeptides. Estuarine HS exhibit mixed continental-marine influences, these being highly influenced by site location. Overall, the data suggest that aquatic and mixed HS are more aliphatic than has been proposed in current models and also that amide linkages form an important part of their structural configuration.en
dc.publisherCoastal Education & Research Foundation-
dc.sourceWeb of Science-
dc.subjecthumic acidspt
dc.subjectfulvic acidspt
dc.subjectinfrared spectroscopypt
dc.subjectcoastal marinept
dc.titleStructural description of humic substances from subtropical coastal environments using elemental analysis, FT-IR and C-13-solid state NMR dataen
dc.contributor.institutionUniversidade Federal de Santa Catarina (UFSC)-
dc.contributor.institutionUniv Caxias do Sul-
dc.contributor.institutionUniv Bordeaux 1-
dc.contributor.institutionUniv Aveiro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUniv Fed Santa Catarina, Dept Quim, BR-88040900 Florianopolis, SC, Brazil-
dc.description.affiliationUniv Caxias do Sul, Ctr Tecnol, Caxias do Sul, Brazil-
dc.description.affiliationUCS, CCET, DEFQ, BR-95070560 Caxias do Sul, RS, Brazil-
dc.description.affiliationUniv Bordeaux 1, LPTC, CNRS, UMR 5472, F-33405 Talence, France-
dc.description.affiliationUniv Aveiro, Dept Quim, P-3810193 Aveiro, Portugal-
dc.description.affiliationUniv Estadual Paulista, Dept Zool, BR-18618000 Botucatu, SP, Brazil-
dc.description.affiliationUniv Fed Santa Catarina, NEMAR, BR-88040900 Florianopolis, SC, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, Dept Zool, BR-18618000 Botucatu, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Coastal Research-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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