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Authordc.contributor.authorCelis, F.
Authordc.contributor.authorSegura, C.
Authordc.contributor.authorGómez Jeria, Juan Sebastián
Authordc.contributor.authorCampos Vallette, Marcelo Mariano
Authordc.contributor.authorSánchez Cortés, S.
Cita de ítemdc.identifier.citationScientifc Reports (2021) 11:6560es_ES
Abstractdc.description.abstractSERS spectroscopy is successfully employed in this work to reveal different components integrating the cochineal colorant employed for dying archaeological textile samples from the Arica Region in North Chile. This analysis was done by in-situ experiments that does not imply the material (colorant and biomolecules) extraction. The spectroscopic analysis of the archaeological textiles by SERS reveals the presence of bands attributed to carminic acid and nucleobases, mainly adenine and guanine. The identification of these biomolecules was also verified in raw cochineal extract and in cochineal dyed replica wool fibers fabricated by us following ancient receipts. The effect of Al on the complexation of carminic acid and other biomolecules was also tested in order to understand the changes induced by the metal interaction on the colorant structure. This study revealed that Al can also complex biomolecules existing in the cochineal extract. In particular, guanine residue seems to interact strongly with the metal, since SERS bands of this residue are enhanced. Furthermore, a theoretical analysis on the interaction of carminic acid and a silver surface was also performed in order to better understand the interaction mechanism between carminic acid and a metal surface that leads to the final SERS spectrum. The results of the present work will be very useful in the identification of different molecules and metal complexes that may be forming part of the cochineal colorant found in archaeological materials.es_ES
Patrocinadordc.description.sponsorshipi-COOP+2015 Program of CSIC COOPB20146 Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) 21150397 Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 3150222 Universidad de Playa Ancha (Concurso Regular de Investigacion 2018) CNE 10-1920 MINECO/FEDER project FIS2017-84318-Res_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
Link to Licensedc.rights.uri*
Sourcedc.sourceScientifc Reportses_ES
Títulodc.titleAnalysis of biomolecules in cochineal dyed archaeological textiles by surface‑enhanced Raman spectroscopyes_ES
Document typedc.typeArtículo de revistaes_ES
dc.description.versiondc.description.versionVersión publicada - versión final del editores_ES
dcterms.accessRightsdcterms.accessRightsAcceso abiertoes_ES
Indexationuchile.indexArtículo de publícación WoSes_ES

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Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States