title: Structural analysis of the cell membrane complex in the human hair cuticle using microbeam X-ray diffraction: relationship with the effects of hair dyeing.
abstract: 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 beta- and delta-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 beta- and delta-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 delta-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 beta-layer and the extent of dyeing.
authors.affiliation: Basic Research Laboratory, Kanebo Cosmetics, Inc., 5-3-28 Kotobuki-cho, Odawara, 250-0002, Japan.
authors.forename: Takafumi
authors.initials: T
authors.lastname: Inoue
authors.forename: Yoshimichi
authors.initials: Y
authors.lastname: Iwamoto
authors.forename: Noboru
authors.initials: N
authors.lastname: Ohta
authors.forename: Katuaki
authors.initials: K
authors.lastname: Inoue
authors.forename: Naoto
authors.initials: N
authors.lastname: Yagi
mesh_terms: D002462:Cell Membrane / Q000737:chemistry; D005260:Female; D006197:Hair / Q000737:chemistry* / Q000648:ultrastructure; D006202:Hair Dyes / Q000737:chemistry*; D006801:Humans; D053838:Scattering, Small Angle; D014961:X-Ray Diffraction
chemical_list: D006202:Hair Dyes