title: Low-flux electron diffraction study for the intercellular lipid organization on a human corneocyte.
abstract: Human skin stratum corneum (SC) structures were investigated by electron diffraction (ED) with a very low-flux electron beam with the help of high-sensitivity detectors, the imaging plate and the CCD camera. This low-flux electron diffraction (LFED) method made it possible to minimize the unfavorable effect of electron beam damage and to give a reliable diffraction pattern from a small selected area (0.2μm(2)) on a corneocyte. Dependence of the 2-dimensional ED pattern on the size of the selected area showed that orientational correlation between lipid packing domains can persist over the area much larger than their domain size. The LFED method also allowed us to trace the detailed structural change induced by the electron beam damage. The ED diffraction peak for the lattice constant of about 4.1nm decayed in three steps. The detailed analysis of these three steps suggested that a different type of orthorhombic structure exists interacted with the well-described hexagonal and orthorhombic structures, in the process of decay resulting from electron beam damage.
authors: School of Science and Technology, Kwansei Gakuin University, Sanda, Japan. nakazawa@kwansei.ac.jp
authors: Hiromitsu
authors: H
authors: Nakazawa
authors: Tomohiro
authors: T
authors: Imai
authors: Ichiro
authors: I
authors: Hatta
authors: Shingo
authors: S
authors: Sakai
authors: Shintaro
authors: S
authors: Inoue
authors: Satoru
authors: S
authors: Kato
mesh_terms: D000328:Adult; D002462:Cell Membrane / Q000737:chemistry* / Q000648:ultrastructure; D004583:Electrons; D000078404:Epidermal Cells; D004817:Epidermis / Q000737:chemistry* / Q000648:ultrastructure; D006801:Humans; D007700:Kinetics; D008297:Male; D008563:Membrane Lipids / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D015203:Reproducibility of Results; D055815:Young Adult
chemical_list: D008563:Membrane Lipids