Infrared analysis of hair dyeing and bleaching history

Ermolenkov, Alexei; Kurouski, Dmitry

doi:10.1039/d0ay01068e

Cited by 10 publications

(14 citation statements)

References 30 publications

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“…The absorption peak at 2875 cm –1 belongs to the C–H stretching vibration absorption peak, and there are absorption bands belonging to −OH and −NH stretching vibrations between 3440 cm –1 . After the tyrosinase catalyzes the deposition of pigments on the hair surface, the absorption peaks at 1421 and 1450 cm –1 only appear for the tyrosine derivatives, which belong to the CO bending vibration of the unreacted quinones. ,, In addition, a vibration peak appears at 790 cm –1 , which may be due to the formation of a disubstituted product on the benzene ring. These peak differences in the infrared spectrum demonstrate the successful deposition of different oxidation pigments on the surface of the hair.…”

Section: Resultsmentioning

confidence: 99%

Colorful Pigments for Hair Dyeing Based on Enzymatic Oxidation of Tyrosine Derivatives

Shen

Liu

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Melanin exists widely in nature and can afford a variety of colors from black to brown and red according to chemical structure differences and specific mixtures. Inspired by nature, this work reports that tyrosine derivatives with different protecting groups at its N- or C-terminal can be enzymatically oxidized into melanin-like pigments with a wide range of colors. The emergence of colorful pigments can be attributed to the incomplete enzymatic oxidation and polymerization caused by the chemical premodification of the tyrosine molecule. The pigments can be deposited on the surface of the hair to obtain a series of colorful and saturated hair dye effects. Moreover, after the pigments were coated on the hair, we can further deposit silver nanoparticles through in situ reduction, making these coatings have anti-inflammatory and antibacterial potential, thereby expanding their potential use for people with low immunity or those who work in hospitals. This work proposes a green and effective way to synthesize colorful pigments with great potential applications in the hair dying and cosmetic industries.

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Section: Resultsmentioning

confidence: 99%

Colorful Pigments for Hair Dyeing Based on Enzymatic Oxidation of Tyrosine Derivatives

Shen

Liu

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…To discriminate among natural, bleached, and dyed (permanent and semipermanent) hair, Contreras et al used IR spectroscopy. 103 Using multivariant statistical analysis, they were able to discriminate among hair types with 96−100% accuracy. To analyze the permeation of cosmetics in the hair fiber, Dias Santos used a combination of Raman, IR, and fluorescence microspectroscopy.…”

Section: T H Imentioning

confidence: 99%

“…Forensic research on hair cosmetics focuses on hair dyes and additive products. To discriminate among natural, bleached, and dyed (permanent and semipermanent) hair, Contreras et al used IR spectroscopy . Using multivariant statistical analysis, they were able to discriminate among hair types with 96–100% accuracy.…”

Section: Chemistry: Trace Evidencementioning

confidence: 99%

Innovative Vibrational Spectroscopy Research for Forensic Application

et al. 2023

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“…Infrared (IR) spectroscopy is commonly used to analyze the chemical structure of a broad range of samples ranging from food supplies to forensic specimens. − This is primarily due to the (i) noninvasive and nondestructive nature of IR, (ii) low instrumental costs, (iii) high sensitivity, and (iv) rapid development of computational approaches that enable the prediction of IR spectra based on the chemical structure of the analyte. − Over the past decade, substantial instrumental development enabled the miniaturization of IR spectrometers, , as well as a development of IR microscopes that can provide ∼10 mm spatial resolution in the chemical imaging of analyzed samples. , …”

Section: Introductionmentioning

confidence: 99%

Characterization of Substrates and Surface-Enhancement in Atomic Force Microscopy Infrared Analysis of Amyloid Aggregates

et al. 2022

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Atomic force microscopy infrared (AFM-IR) spectroscopy is an emerging analytical technique that can be used to probe the structural organization of specimens with nanometer spatial resolution. A growing body of evidence suggests that nanoscale structural analysis of very small (<10 nm) biological objects, such as viruses and amyloid aggregates, requires substrates that must fit strict criteria of low surface roughness and low IR background, simultaneously. In this study, we examine the suitability of a broad range of substrates commonly used in AFM and IR fields, and we determined that silicon, zinc sulfide, and calcium fluoride are the most ideal substrates for nanoscale imaging of amyloid oligomers, protein aggregates that are directly linked to the onset and progression of neurodegenerative diseases. Our data show that these substrates provide the lowest roughness and the lowest background in the 800− 1800 cm −1 spectral window from all examined AFM and IR substrates. We also investigate a contribution of surface enhancement in AFM-IR by the direct comparison of signal intensities from oligomers located on silicon and gold-coated silicon surfaces. We found that metallization of such substrates provides a factor of ∼7 enhancements to the IR signal and induces an equivalent enhancement of the sample background in the 950−1250 cm −1 spectral region.

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Infrared analysis of hair dyeing and bleaching history

Abstract: Forensic examination of hair is commonly performed to trace its origin and make a connection between a suspect and a crime scene.

Cited by 10 publications

References 30 publications

Colorful Pigments for Hair Dyeing Based on Enzymatic Oxidation of Tyrosine Derivatives

Colorful Pigments for Hair Dyeing Based on Enzymatic Oxidation of Tyrosine Derivatives

Innovative Vibrational Spectroscopy Research for Forensic Application

Characterization of Substrates and Surface-Enhancement in Atomic Force Microscopy Infrared Analysis of Amyloid Aggregates

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