Abstract:
In general, human hair is claimed to turn yellower after sun exposure. This is particularly affirmed for white hair. However, quantitative data relating yellowness to hair type and to the radiation wavelength are missing. This work shows results of the effect of full or UVB-filtered radiation of a mercury vapor or a xenon-arc lamp on the yellowness of virgin white, dark-brown, blond and red hair. All hair types showed a substantial change in yellowness after irradiation, which is dependent on the hair type and radiation wavelength. Surprisingly, white hair turns less yellow after both full and UVB-filtered radiation exposure. This effect is more pronounced when UVB is filtered from the radiation system. The only radiation that shows a photo-yellowing effect on white hair is infrared. As the yellowness of white hair is commonly related to tryptophan degradation, fluorescence experiments with hair solutions were performed to identify the natural degradation of tryptophan which occurs in hair after light irradiation. Pigmented hairs were also studied, as well as hair treated with a bleaching solution. Although we observe a decrease in tryptophan content of hair after lamp radiation, a direct correlation with hair yellowness was not achieved. Results are discussed in terms of hair type, composition and melanin content. © 2007 Elsevier B.V. All rights reserved.
Registro:
Documento: |
Artículo
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Título: | Photo yellowing of human hair |
Autor: | Nogueira, A.C.S.; Richena, M.; Dicelio, L.E.; Joekes, I. |
Filiación: | Departamento de Físico-Química, Instituto de Química, Universidade Estadual de Campinas - UNICAMP, C.P. 6154, 13084-971 Campinas, SP, Brazil INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
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Palabras clave: | Hair color; Photo-degradation; UV-light; White hair; melanin; sunscreen; tryptophan; article; bleaching; controlled study; female; filter; fluorescence spectroscopy; hair analysis; hair discoloration; human; infrared radiation; photodegradation; priority journal; radiation exposure; sunlight protection; ultraviolet B radiation; ultraviolet irradiation; Dose-Response Relationship, Radiation; Filtration; Hair; Hair Color; Humans; Melanins; Mercury; Pigments, Biological; Time Factors; Tryptophan; Ultraviolet Rays; Xenon |
Año: | 2007
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Volumen: | 88
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Número: | 2-3
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Página de inicio: | 119
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Página de fin: | 125
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DOI: |
http://dx.doi.org/10.1016/j.jphotobiol.2007.05.005 |
Título revista: | Journal of Photochemistry and Photobiology B: Biology
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Título revista abreviado: | J. Photochem. Photobiol. B Biol.
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ISSN: | 10111344
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CODEN: | JPPBE
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CAS: | melanin, 8049-97-6; tryptophan, 6912-86-3, 73-22-3; Melanins; Mercury, 7439-97-6; Pigments, Biological; Tryptophan, 73-22-3; Xenon, 7440-63-3
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10111344_v88_n2-3_p119_Nogueira |
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Citas:
---------- APA ----------
Nogueira, A.C.S., Richena, M., Dicelio, L.E. & Joekes, I.
(2007)
. Photo yellowing of human hair. Journal of Photochemistry and Photobiology B: Biology, 88(2-3), 119-125.
http://dx.doi.org/10.1016/j.jphotobiol.2007.05.005---------- CHICAGO ----------
Nogueira, A.C.S., Richena, M., Dicelio, L.E., Joekes, I.
"Photo yellowing of human hair"
. Journal of Photochemistry and Photobiology B: Biology 88, no. 2-3
(2007) : 119-125.
http://dx.doi.org/10.1016/j.jphotobiol.2007.05.005---------- MLA ----------
Nogueira, A.C.S., Richena, M., Dicelio, L.E., Joekes, I.
"Photo yellowing of human hair"
. Journal of Photochemistry and Photobiology B: Biology, vol. 88, no. 2-3, 2007, pp. 119-125.
http://dx.doi.org/10.1016/j.jphotobiol.2007.05.005---------- VANCOUVER ----------
Nogueira, A.C.S., Richena, M., Dicelio, L.E., Joekes, I. Photo yellowing of human hair. J. Photochem. Photobiol. B Biol. 2007;88(2-3):119-125.
http://dx.doi.org/10.1016/j.jphotobiol.2007.05.005