Abstract: A process for preparing polylactide (PLA) microcapsules is described and involves dissolving PLA in a mixture of two miscible organic liquids, the higher vapor pressure liquid having solvent power for PLA and the second having little or no solvent power for PLA. The solution is prepared such that it is near its saturation point for PLA. Encapsulation of dispersed core material is achieved by vaporizing the liquid having solvent power for PLA causing phase separation of the PLA, then transferring the separated dispersion to an organic liquid having no solvent power for the PLA in order to harden the encapsulating coating. The disclosed process enables forming true microcapsules or reservoir-type devices encapsulating liquid core material particularly aqueous liquid core material and oil in water emulsion or suspensions.

Abstract: Electric accumulators of the type comprising an anode compartment containing an anode formed from at least one metal selected from the group consisting of metals belonging to Groups Ia, IIa, IIb and IIIb of the periodic table of elements; a cathode compartment containing a cathode formed at least partly from a conducting member comprising a substance capable of accepting electrons, to form anions by cathodic reduction, and an electrolyte consisting of a substance capable of dissolving the product or products generated during discharge of the accumulator; the anode compartment and cathode compartment being separated from each other by a wall impervious to fluids and formed from a solid mineral electrolyte capable of allowing selective migration of the anode metal, in the form of cations are improved by adding to the anode compartment a salt of the anode metal between the anode and the separation wall.