Electron probe analysis of human skin: determination of the water concentration profile - PubMed (original) (raw)
Electron probe analysis of human skin: determination of the water concentration profile
R R Warner et al. J Invest Dermatol. 1988 Feb.
Free article
Abstract
The water concentration profile across rapidly frozen human epidermis has been measured using electron probe analysis and analytical electron microscopy. Determinations were made within the cytoplasm of individual cells. From the basal layer, the water content remained relatively constant or decreased slightly across the viable tissue and decreased approximately linearly across the stratum corneum. A considerable discontinuity in water content occurred between these two regions over the stratum corneum-stratum granulosum junction and the last granular cell layer. The dominance of the water profile by a discontinuity suggests water loss is governed by a partitioning process, presumably a partitioning into the lipid domain. A water discontinuity offers important functional advantages in the conservation of substances within the body and in protection from intruding molecules.
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