Abstract: The present invention relates to a method of preparation of a solid substrate capable of immobilizing at least one cell and/or at least one part of a cell, said method comprising a step consisting of fixing, to said solid substrate, a fusogenic compound capable of being inserted in cell membranes. The present invention also relates to a method for immobilizing at least one cell and/or at least one part of a cell using the solid substrate thus prepared, said solid substrate and its uses in the area of biomedical diagnostics or health monitoring of biological fluids or intended for human or animal use.

Abstract: Materials possessing ionic conductivity which are suitable for use as electrolytes, notably in electrochromic systems, comprising an ionomer obtained by the neutralization of a Bronsted polyacid by an MOH alkali metal hydroxide, the neutralization rate .alpha. being such that 0<.alpha.<.alpha..sub.m, where .alpha..sub.m is the neutralization rate beyond which a phase separation takes place. The ionomer comprises a polymeric chain having a plurality of anionic groups affixed thereto and a plurality of alkaline cations associated therewith. The material further comprises a polar solvent, capable of solubilizing or plasticizing the ionomer and of assuring a partial ionic diassociation as well as transporting the M.sup.+ ions. Optionally, this material may comprise, in addition to the above, a Bronsted polybase soluble in the polar solvent which does not form a solid precipitate with the ionomer and an MX inorganic salt wherein M.sup.

Abstract: The invention relates to coated glass substrates for obtaining a variable degree of light transmission therethrough. The coated substrate comprises successively, (1) a first transparent support plate, preferably formed of glass, (2) a transparent electroconductive layer, (3) a layer of an electrochromic material, (4) a proton conductive electrolytic layer having an organic polymer base, (4a) an optional counterelectrode layer, (5) a second electroconductive layer and (6) a second transparent support plate. A proton conductive polymer is selected for the electrolyte whose conductivity is greater than or equal to ##EQU1## wherein the layer has a thickness of less than 50 micrometers.