Analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy

Abstract SERS 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 (c...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	F. Celis, C. Segura, J. S. Gómez-Jeria, M. Campos-Vallette, S. Sanchez-Cortes
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/617af274c66049439bd3692f7b45a7c0
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:617af274c66049439bd3692f7b45a7c0
record_format	dspace
spelling	oai:doaj.org-article:617af274c66049439bd3692f7b45a7c02021-12-02T17:04:34ZAnalysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy10.1038/s41598-021-86074-92045-2322https://doaj.org/article/617af274c66049439bd3692f7b45a7c02021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86074-9https://doaj.org/toc/2045-2322Abstract SERS 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.F. CelisC. SeguraJ. S. Gómez-JeriaM. Campos-ValletteS. Sanchez-CortesNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q F. Celis C. Segura J. S. Gómez-Jeria M. Campos-Vallette S. Sanchez-Cortes Analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy
description	Abstract SERS 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.
format	article
author	F. Celis C. Segura J. S. Gómez-Jeria M. Campos-Vallette S. Sanchez-Cortes
author_facet	F. Celis C. Segura J. S. Gómez-Jeria M. Campos-Vallette S. Sanchez-Cortes
author_sort	F. Celis
title	Analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy
title_short	Analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy
title_full	Analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy
title_fullStr	Analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy
title_full_unstemmed	Analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy
title_sort	analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced raman spectroscopy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/617af274c66049439bd3692f7b45a7c0
work_keys_str_mv	AT fcelis analysisofbiomoleculesincochinealdyedarchaeologicaltextilesbysurfaceenhancedramanspectroscopy AT csegura analysisofbiomoleculesincochinealdyedarchaeologicaltextilesbysurfaceenhancedramanspectroscopy AT jsgomezjeria analysisofbiomoleculesincochinealdyedarchaeologicaltextilesbysurfaceenhancedramanspectroscopy AT mcamposvallette analysisofbiomoleculesincochinealdyedarchaeologicaltextilesbysurfaceenhancedramanspectroscopy AT ssanchezcortes analysisofbiomoleculesincochinealdyedarchaeologicaltextilesbysurfaceenhancedramanspectroscopy
_version_	1718381851581612032

Analysis of biomolecules in cochineal dyed archaeological textiles by surface-enhanced Raman spectroscopy

Ejemplares similares