Photo yellowing of human hair

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 m...

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Autor principal:	Dicelio, Lelia Elina
Publicado:	2007
Materias:	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
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10111344_v88_n2-3_p119_Nogueira http://hdl.handle.net/20.500.12110/paper_10111344_v88_n2-3_p119_Nogueira
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10111344_v88_n2-3_p119_Nogueira
record_format	dspace
spelling	paper:paper_10111344_v88_n2-3_p119_Nogueira2023-06-08T15:59:42Z Photo yellowing of human hair Dicelio, Lelia Elina 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 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. Fil:Dicelio, L.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10111344_v88_n2-3_p119_Nogueira http://hdl.handle.net/20.500.12110/paper_10111344_v88_n2-3_p119_Nogueira
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	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
spellingShingle	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 Dicelio, Lelia Elina Photo yellowing of human hair
topic_facet	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
description	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.
author	Dicelio, Lelia Elina
author_facet	Dicelio, Lelia Elina
author_sort	Dicelio, Lelia Elina
title	Photo yellowing of human hair
title_short	Photo yellowing of human hair
title_full	Photo yellowing of human hair
title_fullStr	Photo yellowing of human hair
title_full_unstemmed	Photo yellowing of human hair
title_sort	photo yellowing of human hair
publishDate	2007
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10111344_v88_n2-3_p119_Nogueira http://hdl.handle.net/20.500.12110/paper_10111344_v88_n2-3_p119_Nogueira
work_keys_str_mv	AT dicelioleliaelina photoyellowingofhumanhair
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Photo yellowing of human hair

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