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http://hdl.handle.net/10261/55872
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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Almendros Martín, Gonzalo | - |
dc.contributor.author | Knicker, Heike | - |
dc.contributor.author | González-Vila, Francisco Javier | - |
dc.date.accessioned | 2012-09-09T22:22:30Z | - |
dc.date.available | 2012-09-09T22:22:30Z | - |
dc.date.issued | 2003-11 | - |
dc.identifier.citation | Organic Geochemistry 34(11): 1559-1568 (2003) | es_ES |
dc.identifier.issn | 0146-6380 | - |
dc.identifier.uri | http://hdl.handle.net/10261/55872 | - |
dc.description | 10 páginas, 5 figuras, 4 tablas. | es_ES |
dc.description.abstract | Peat samples subjected to thermal oxidation were studied by solid-state 13C- and 15N-NMR spectroscopy, so as to gain information on the thermal alteration of organic matter during processes such as natural fires or prescribed fires affecting soils. The 13C-NMR spectra show that heating (up to 180 s at 350 °C) increases the aromaticity of the original peat to values typical for black-carbon material, but these charred residues (at least after weight losses of ca. 25%) still contained heat-resistant alkyl carbon. The 15N-NMR spectrum of the original peat is dominated by a signal at −258 ppm, suggesting peptide-like material. In the heated samples a resonance line appearing at lower field indicates progressive formation of pyrrole- and indole-type compounds. Calculations based on weight loss, elemental composition and relative intensity distribution of the 13C- and 15N-NMR spectra demonstrate that the increasing concentrations of aromatic C-types and heterocyclic N-forms with progressive heating are not only caused by a relative enrichment concomitant with the selective thermal degradation of labile structures (mainly O-alkyl and amides) but correspond to newly-synthesised structures that were formed from aliphatic material. | es_ES |
dc.description.sponsorship | Thanks are due to the Spanish-German action HA 2000-0059 supported by the Spanish MCyT and the German DAAD for allowing mobility of the scientists involved in this research. | - |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | closedAccess | es_ES |
dc.title | Rearrangement of carbon and nitrogen forms in peat after progressive thermal oxidation as determined by solid-state 13C-and 15N-NMR spectroscopy | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1016/S0146-6380(03)00152-9 | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1016/S0146-6380(03)00152-9 | es_ES |
dc.contributor.funder | Ministerio de Ciencia y Tecnología (España) | - |
dc.contributor.funder | German Academic Exchange Service | - |
dc.identifier.funder | http://dx.doi.org/10.13039/501100006280 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100001655 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.grantfulltext | none | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.openairetype | artículo | - |
Aparece en las colecciones: | (IRNAS) Artículos |
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accesoRestringido.pdf | 29,17 kB | Adobe PDF | Visualizar/Abrir |
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