title: Gravity and the membrane-solution interface:  theoretical investigations.
abstract: The theory of concentration and potential variations at interfaces is applied to the membrane-solution interface to calculate density variations.  The theory is modified to take care of the finite ion volumes in electrolytes.  Our model is a phospholipid membrane with a surface charge density of -4.824*10(-6)(As/cm2) in contact with solutions of KCl, NaCl, CaCl2, and mixtures.  Maximal density variations of about 4*10(-2)(G/cm3) were found in surface layers between the membrane and the solutions.  The extension of the layers is in the range of 1 to 6 nm.
authors.affiliation: DFVLR--Institute for Aerospace Medicine, Cologne, FRG.
authors.forename: A
authors.initials: A
authors.lastname: Schatz
authors.forename: A
authors.initials: A
authors.lastname: Linke-Hommes
mesh_terms: D002122:Calcium Chloride / Q000737:chemistry; D004573:Electrolytes / Q000737:chemistry; D006112:Gravitation; D008567:Membranes, Artificial; D008962:Models, Theoretical; D010743:Phospholipids / Q000737:chemistry; D011189:Potassium Chloride / Q000737:chemistry; D012965:Sodium Chloride / Q000737:chemistry
chemical_list: D004573:Electrolytes; D008567:Membranes, Artificial; D010743:Phospholipids; D012965:Sodium Chloride; D011189:Potassium Chloride; D002122:Calcium Chloride