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Structural analysis of the cell membrane complex in the human hair cuticle using microbeam X‐ray diffraction: relationship with the effects of hair dyeing
Author(s) -
Inoue Takafumi,
Iwamoto Yoshimichi,
Ohta Noboru,
Inoue Katuaki,
Yagi Naoto
Publication year - 2007
Publication title -
international journal of cosmetic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 62
eISSN - 1468-2494
pISSN - 0142-5463
DOI - 10.1111/j.1468-2494.2007.00391_2.x
Subject(s) - dyeing , cuticle (hair) , microbeam , solvent , materials science , scattering , membrane , layer (electronics) , crystallography , chemistry , chromatography , optics , composite material , anatomy , biology , biochemistry , physics
This article deals with the structure of the cell membrane complex (CMC) in the human hair cuticle. The microbeam X‐ray provided a pattern of small‐angle scattering from the CMC in the cuticle with no sample preparations, including slicing and pre‐staining of hair. The thickness of the β‐and δ‐layers, substructure in CMC, was estimated by analysis of the scattering pattern. We used hair samples extracted with several solvents, and found that solvent extraction changed the thickness of the β‐and δ‐layers in a manner dependent on the type of solvent. Extraction of hair with solvent was also shown to have effects on the extent of dyeing. There was a high correlation between the extent of dyeing and the thickness of the δ‐layer, i.e., a thin layer tended to show a high amount of dyeing, whereas there was no significant correlation between the thickness of the β‐layer and the extent of dyeing.