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dc.contributor.authorGarcía-Guinea, Javier-
dc.contributor.authorFurio, Marta-
dc.contributor.authorSánchez Moral, Sergio-
dc.contributor.authorJurado, Valme-
dc.contributor.authorCorrecher, Virgilio-
dc.contributor.authorSáiz-Jiménez, Cesáreo-
dc.date.issued2015-01-25-
dc.identifier.citationSpectrochimica Acta - A - Molecular and Biomolecular Spectroscopy 135: 203–210 (2015)es_ES
dc.identifier.issn1386-1425-
dc.identifier.urihttp://hdl.handle.net/10261/101128-
dc.description8 páginas.-- 1 gráfico en el resumen.-- 6 figuras.-- 46 referenciases_ES
dc.description.abstractMine drainages of La Poderosa (El Campillo, Huelva, Spain), located in the Rio Tinto Basin (Iberian Pyrite Belt) generate carotenoid complexes mixed with copper sulfates presenting good natural models for the production of carotenoids from microorganisms. The environmental conditions of Rio Tinto Basin include important environmental stresses to force the microorganisms to accumulate carotenoids. Here we show as carotenoid compounds in sediments can be analyzed directly in the solid state by Raman and Luminescence spectroscopy techniques to identify solid carotenoid, avoiding dissolution and pre-concentration treatments, since the hydrous copper-salted paragenesis do not mask the Raman emission of carotenoids. Raman spectra recorded from one of these specimens' exhibit major features at approximately 1006, 1154, and 1520 cm-1. The bands at 1520 cm-1 and 1154 cm-1 can be assigned to in-phase CC (γ-1) and CC stretching (γ-2) vibrations of the polyene chain in carotenoids. The in-plane rocking deformations of CH3 groups linked to this chain coupled with CC bonds are observed in the 1006 cm-1 region. X-irradiation pretreatments enhance the cathodoluminescence spectra emission of carotenoids enough to distinguish organic compounds including hydroxyl and carboxyl groups. Carotenoids in copper-sulfates could be used as biomarkers and useful proxies for understanding remote mineral formations as well as for terrestrial environmental investigations related to mine drainage contamination including biological activity and photo-oxidation processes.es_ES
dc.description.sponsorshipThis research was supported by the Spanish Ministry of Sciences and Innovation, Project CGL2010-17108/BTE and CSIC Project 201230E125es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relation.isversionofPreprint-
dc.rightsopenAccesses_ES
dc.subjectCarotenoidses_ES
dc.subjectBiomarkeres_ES
dc.subjectRiotintoes_ES
dc.subjectRamanes_ES
dc.subjectCathodoluminescencees_ES
dc.subjectCopper-sulfateses_ES
dc.titleComposition and spectra of copper-carotenoid sediments from a pyrite mine stream in Spaines_ES
dc.typeartículoes_ES
dc.identifier.doi10.1016/j.saa.2014.07.017-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.saa.2014.07.017es_ES
dc.relation.csices_ES
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