Human hair: subtle change in the thioester groups dynamics observed by combining neutron scattering, X-ray diffraction and thermal analysis

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Human hair : subtle change in the thioester groups dynamics observed by combining neutron scattering, X-ray diffraction and thermal analysis. / Lima, C. R. R. C.; Lima, R. J. S.; Machado, L. D. B.; Velasco, M. V. R.; Lakic, L.; Nordentoft, M. S.; Machuca-Beier, L.; Rudic, S.; Telling, M. T. F.; Sakai, V. Garcia; Oliveira, C. L. P.; Bordallo, H. N.

I: European Physical Journal. Special Topics, Bind 229, Nr. 17-18, 10.11.2020, s. 2825-2832.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Lima, CRRC, Lima, RJS, Machado, LDB, Velasco, MVR, Lakic, L, Nordentoft, MS, Machuca-Beier, L, Rudic, S, Telling, MTF, Sakai, VG, Oliveira, CLP & Bordallo, HN 2020, 'Human hair: subtle change in the thioester groups dynamics observed by combining neutron scattering, X-ray diffraction and thermal analysis', European Physical Journal. Special Topics, bind 229, nr. 17-18, s. 2825-2832. https://doi.org/10.1140/epjst/e2020-900217-4

APA

Lima, C. R. R. C., Lima, R. J. S., Machado, L. D. B., Velasco, M. V. R., Lakic, L., Nordentoft, M. S., Machuca-Beier, L., Rudic, S., Telling, M. T. F., Sakai, V. G., Oliveira, C. L. P., & Bordallo, H. N. (2020). Human hair: subtle change in the thioester groups dynamics observed by combining neutron scattering, X-ray diffraction and thermal analysis. European Physical Journal. Special Topics, 229(17-18), 2825-2832. https://doi.org/10.1140/epjst/e2020-900217-4

Vancouver

Lima CRRC, Lima RJS, Machado LDB, Velasco MVR, Lakic L, Nordentoft MS o.a. Human hair: subtle change in the thioester groups dynamics observed by combining neutron scattering, X-ray diffraction and thermal analysis. European Physical Journal. Special Topics. 2020 nov. 10;229(17-18):2825-2832. https://doi.org/10.1140/epjst/e2020-900217-4

Author

Lima, C. R. R. C. ; Lima, R. J. S. ; Machado, L. D. B. ; Velasco, M. V. R. ; Lakic, L. ; Nordentoft, M. S. ; Machuca-Beier, L. ; Rudic, S. ; Telling, M. T. F. ; Sakai, V. Garcia ; Oliveira, C. L. P. ; Bordallo, H. N. / Human hair : subtle change in the thioester groups dynamics observed by combining neutron scattering, X-ray diffraction and thermal analysis. I: European Physical Journal. Special Topics. 2020 ; Bind 229, Nr. 17-18. s. 2825-2832.

Bibtex

@article{1a61e8b7e0eb4145817581751cfd24a5,
title = "Human hair: subtle change in the thioester groups dynamics observed by combining neutron scattering, X-ray diffraction and thermal analysis",
abstract = "Hair analysis plays an important role in forensic toxicology and biomonitoring tests. However, cosmetic treatments cause changes to the hair. Thus, a better understanding of the hair's structure and the factors that influence its composition is critical. It is known that oxidative treatments modify the hair chemical, structural and mechanical properties. These treatments also cause degradation of the melanin as well as of the structures present in the hair cuticle and cortex. Considering that the literature is unanimous regarding the increase in hydrophilicity and porosity promoted in human hair by bleaching, in this work we investigated how this oxidative damage is triggered. By combining several techniques, inelastic and quasi-elastic neutron scattering, differential scanning calorimetry, thermal gravimetric analysis and X-ray diffraction, we were able to connect the chemical and structural changes to a subtle dynamic modification of the proton mobility in the hair fibers. In addition, alterations in the thermal behavior evidenced a small denaturation of alpha-keratin intermediate filaments and a slight decrease in the amount of confined water in the hair fibers. Moreover, data obtained by neutron spectroscopy indicated that bleaching attacks the thioester groups of the proteins causing larger proton mobility of the hydrogenous components (water, protein and/or lipids).",
keywords = "STRUCTURAL-CHANGES, KERATIN FIBERS, WATER, RAMAN",
author = "Lima, {C. R. R. C.} and Lima, {R. J. S.} and Machado, {L. D. B.} and Velasco, {M. V. R.} and L. Lakic and Nordentoft, {M. S.} and L. Machuca-Beier and S. Rudic and Telling, {M. T. F.} and Sakai, {V. Garcia} and Oliveira, {C. L. P.} and Bordallo, {H. N.}",
year = "2020",
month = nov,
day = "10",
doi = "10.1140/epjst/e2020-900217-4",
language = "English",
volume = "229",
pages = "2825--2832",
journal = "European Physical Journal. Special Topics",
issn = "1951-6355",
publisher = "Springer",
number = "17-18",

}

RIS

TY - JOUR

T1 - Human hair

T2 - subtle change in the thioester groups dynamics observed by combining neutron scattering, X-ray diffraction and thermal analysis

AU - Lima, C. R. R. C.

AU - Lima, R. J. S.

AU - Machado, L. D. B.

AU - Velasco, M. V. R.

AU - Lakic, L.

AU - Nordentoft, M. S.

AU - Machuca-Beier, L.

AU - Rudic, S.

AU - Telling, M. T. F.

AU - Sakai, V. Garcia

AU - Oliveira, C. L. P.

AU - Bordallo, H. N.

PY - 2020/11/10

Y1 - 2020/11/10

N2 - Hair analysis plays an important role in forensic toxicology and biomonitoring tests. However, cosmetic treatments cause changes to the hair. Thus, a better understanding of the hair's structure and the factors that influence its composition is critical. It is known that oxidative treatments modify the hair chemical, structural and mechanical properties. These treatments also cause degradation of the melanin as well as of the structures present in the hair cuticle and cortex. Considering that the literature is unanimous regarding the increase in hydrophilicity and porosity promoted in human hair by bleaching, in this work we investigated how this oxidative damage is triggered. By combining several techniques, inelastic and quasi-elastic neutron scattering, differential scanning calorimetry, thermal gravimetric analysis and X-ray diffraction, we were able to connect the chemical and structural changes to a subtle dynamic modification of the proton mobility in the hair fibers. In addition, alterations in the thermal behavior evidenced a small denaturation of alpha-keratin intermediate filaments and a slight decrease in the amount of confined water in the hair fibers. Moreover, data obtained by neutron spectroscopy indicated that bleaching attacks the thioester groups of the proteins causing larger proton mobility of the hydrogenous components (water, protein and/or lipids).

AB - Hair analysis plays an important role in forensic toxicology and biomonitoring tests. However, cosmetic treatments cause changes to the hair. Thus, a better understanding of the hair's structure and the factors that influence its composition is critical. It is known that oxidative treatments modify the hair chemical, structural and mechanical properties. These treatments also cause degradation of the melanin as well as of the structures present in the hair cuticle and cortex. Considering that the literature is unanimous regarding the increase in hydrophilicity and porosity promoted in human hair by bleaching, in this work we investigated how this oxidative damage is triggered. By combining several techniques, inelastic and quasi-elastic neutron scattering, differential scanning calorimetry, thermal gravimetric analysis and X-ray diffraction, we were able to connect the chemical and structural changes to a subtle dynamic modification of the proton mobility in the hair fibers. In addition, alterations in the thermal behavior evidenced a small denaturation of alpha-keratin intermediate filaments and a slight decrease in the amount of confined water in the hair fibers. Moreover, data obtained by neutron spectroscopy indicated that bleaching attacks the thioester groups of the proteins causing larger proton mobility of the hydrogenous components (water, protein and/or lipids).

KW - STRUCTURAL-CHANGES

KW - KERATIN FIBERS

KW - WATER

KW - RAMAN

U2 - 10.1140/epjst/e2020-900217-4

DO - 10.1140/epjst/e2020-900217-4

M3 - Journal article

VL - 229

SP - 2825

EP - 2832

JO - European Physical Journal. Special Topics

JF - European Physical Journal. Special Topics

SN - 1951-6355

IS - 17-18

ER -

ID: 252833349