Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/57933
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

13C and 15N NMR analysis of some fungal melanins in comparison with soil organic matter

AuthorsKnicker, Heike CSIC ORCID ; Almendros Martín, Gonzalo CSIC ORCID ; González-Vila, Francisco Javier CSIC ORCID ; Lüdemann, H.-D.; Martín Martínez, Francisco
Issue Date1995
PublisherElsevier
CitationOrganic Geochemistry 23(11-12): 1023-1028 (1995)
AbstractA variety of fungal melanins with natural 15N abundance are characterized by solid-state 13C and 15N NMR spectroscopy and are compared to solid-state 13C and 15N NMR spectra of organic matter from representative soils. In all solid-state 15N NMR spectra the peptide/amide region (-220 to -285 ppm) dominates with more than 70% of the total intensity. The region between -285 and -375 ppm, assigned to amino and ammonium groups, always contains more than half of the remaining intensity. The area in the region from -30 to -220 ppm, where aromatic heterocycles would show signals, makes up less than 10% of the total intensity. These findings call into question common structural models for melanins. The solid-state 13C NMR spectra, on the other hand, reveal large differences when the melanins are compared to each other, and to composts and soils. The concentration of the aromatic carbon varies from 5 to 40% in the melanin series. The ratio Caro Ntot and Cali Ntot were calculated, and confirm that nitrogen in these samples is bound in Ca-groups rather than in aromatic heterocyclic structures.
URIhttp://hdl.handle.net/10261/57933
DOI10.1016/0146-6380(95)00094-1
Identifiersdoi: 10.1016/0146-6380(95)00094-1
issn: 0146-6380
Appears in Collections:(IRNAS) Artículos
(CCMA) Artículos

Show full item record
Review this work

SCOPUSTM   
Citations

84
checked on May 10, 2022

WEB OF SCIENCETM
Citations

81
checked on May 16, 2022

Page view(s)

381
checked on May 17, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.