The influence of the number of shock waves and the energy flux density on the Raman spectrum of collagen type I from rat

Cárcamo-Vega, José J.; Brañes, Manuel; Loske, Achim M.; Campos‐Vallette, Marcelo

doi:10.1007/s00193-019-00920-4

Cited by 7 publications

(11 citation statements)

References 44 publications

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“…Fig. 4 FORS spectrum: a Sample 1: anthraquinone, b Sample 13: anthraquinone, and c Sample18: indigo 858 cm −1 suggest the presence of the proteinic structure of the animal fiber, as reported before by our group in the study of isolated proteins or as part of a complex matrix [122][123][124]. Other bands that can be attributed to the dye are located at 505 and 456 cm −1 .…”

Section: Results Of Colors Characterizationsupporting

confidence: 61%

“…The signal at 1078 cm −1 , attributed to a CC stretching in proteins, is not reported for alizarin [116][117][118]. Owing to our experience in the vibrational analysis of proteins and according to the literature [122][123][124][125], this band may be related to the protein structure of the animal fiber. Vibrations of the peptide backbone in proteins are usually associated with three main regions of the Raman spectrum [126].…”

Section: Results Of Colors Characterizationmentioning

confidence: 90%

“…In both cases is broadband that encloses a group of bands in the 1380-1300 cm −1 interval. Moreover, this band could be influenced by the amide III vibration described for proteins [123,124]. Bands near 1397, 1076, 956 and (See figure on next page.)…”

Section: Results Of Colors Characterizationmentioning

confidence: 96%

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Colors and dyes of archaeological textiles from Tarapacá in the Atacama Desert (South Central Andes)

et al. 2021

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This work concerns the study of colors and dyes identified on archaeological textiles from the Atacama Desert. The different garments and ornaments come from the excavation of two important pre-Columbian cemeteries of the Tarapacá region: Tarapacá-40 attributed to the Formative period (1100 BC–660 AD) and Pica-8 to the Late Intermediate period (900–1450 AD). For the first time, a multi-analytical approach with non-invasive techniques using FORS and SERS was applied on samples of less than 2 cm of length for physicochemical characterization of the raw materials and the dyes employed in the textile production of northern Chile. The fibers are from animal origin. Blue, green, and yellow are identified as indigo, but we cannot discard a mixture with other dyes to vary hue and shade; while carminic acid and alizarin—to a lesser extent—are found on red, orange, and brown samples. This research provides new elements for the discussion about the textile technology developed in this desertic region, its changes, and continuities along the history. Our results are compared to recent findings on neighboring regions from South-Central Andes, to improve the current knowledge and discuss the existence of dyeing textile cultural traditions.

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Section: Results Of Colors Characterizationsupporting

confidence: 61%

Section: Results Of Colors Characterizationmentioning

confidence: 90%

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Colors and dyes of archaeological textiles from Tarapacá in the Atacama Desert (South Central Andes)

et al. 2021

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show abstract

“…In both cases is broadband that encloses a group of bands in the 1380 -1300 cm -1 interval. Moreover, this band can be in uenced by the amide III vibration described for proteins [119,120]. Bands near 1397, 1076, 956 and 858 cm -1 suggest the presence of the proteinic structure of the animal ber, as reported before by our group in the study of isolated proteins or as part of a complex matrix [118][119][120].…”

Section: Colors Characterizationsupporting

confidence: 70%

“…The signal at 1078 cm -1 , attributed to a CC stretching in proteins, is not reported for alizarin [112][113][114]. Owing to our experience in the vibrational analysis of proteins and according to the literature [118][119][120][121], this band may be related to the protein structure of the animal ber. Vibrations of the peptide backbone in proteins are usually associated with three main regions of the Raman spectrum [122].…”

Section: Colors Characterizationmentioning

confidence: 92%

Colors and dyes of archaeological textiles from Tarapacá in the Atacama Desert (South Central Andes)

Sepúlveda

Urzúa

Vega

et al. 2021

Preprint

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This work concerns the study of colors and dyes identified on archaeological textiles from the Atacama Desert. The different garments and ornaments come from the excavation of two important pre-Columbian cemeteries of the Tarapacá region: Tarapacá-40 attributed to the Formative period (1100 BC - 660 AD) and Pica-8 to the Late Intermediate period (900 - 1450 AD). For the first time, a multi-analytical approach with non-invasive techniques using Fiber Optics Reflectance Spectroscopy (FORS), Attenuated Total Reflection Infrared Spectroscopy (FT-IR) and Surface-enhanced Raman Scattering (SERS) were applied on samples of less than 2 cm of length for physicochemical characterization of the raw materials and the dyes employed in the textile production of northern Chile. The fibers are from animal origin. Blue, green, and yellow are identified as indigo, but we cannot discard a mixture with other dyes to vary hue and shade; while carminic acid and alizarin - to a lesser extent - are found on red, orange and brown samples. This research provides new elements for the discussion about the textile technology developed in this desertic region, its changes and continuities along with the history. Our results are compared to recent findings on neighbouring regions from northern Chile, to improve the current knowledge and discuss the existence of dyeing textile cultural traditions.

show abstract

A green extraction method for gelatin and its molecular mechanism

Feng

Liu

et al. 2022

Food Hydrocolloids

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The influence of the number of shock waves and the energy flux density on the Raman spectrum of collagen type I from rat

Cited by 7 publications

References 44 publications

Colors and dyes of archaeological textiles from Tarapacá in the Atacama Desert (South Central Andes)

Colors and dyes of archaeological textiles from Tarapacá in the Atacama Desert (South Central Andes)

Colors and dyes of archaeological textiles from Tarapacá in the Atacama Desert (South Central Andes)

A green extraction method for gelatin and its molecular mechanism

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