Abstract: A process is proposed for producing a bipolar plate for an electrochemical device, said process comprising providing a first main plate body and a second main plate body as fibrous shaped bodies including carbon fibers and each having a joining face and an opposing useful face, infiltrating the main plate bodies with at least one carbon allotrope, locally applying silicon to respective joining sites in the joining faces, placing the joining faces against one another, such that the joining sites rest against one another and the useful faces of the two main plate bodies face away from one another, and at least locally heating the joining sites, such that the silicon melts and reacts with adjoining carbon to form a silicon-carbon bond.

Abstract: A system for the controlled release of an active agent to an environment of use, said system having a predetermined release rate of the active agent to the environment of use, comprising: a) a shell comprised of a wall formed of a water-insoluble material which is permeable to the passage of an external fluid, and b) a core which is surrounded by said shell, said core comprised of i) a water-soluble active agent, and ii) a soluble polymeric adjuvant capable of unlimited swelling.

Abstract: A drug formulation administrable by mouth for the treatment of central dopamine deficiency condition, said formulation comprising100 to 250 parts by weight of levodopa,10 to 25 parts by weight of carbidopa,a polymer mixture in an amount of 10 to 200% based on said drugs, said polymer mixture consisting of:0 to 100 parts by weight of a completely saponified polyvinyl alcohol having 0 to 3% residual acetyl content, a mean molecular weight of 60,000 to 80,000 and a total surface area of 0.1 m.sup.2 /g to 0.18 m.sup.2 /g, and0 to 100 parts weight of a partially saponified polyvinyl alcohol having 10 to 18% residual acetyl content, a mean molecular weight of 80,000, a total surface area of 0.5 m.sup.2 /g to 0.69 m.sup.2 /g, and a specific pore volume of 0.2 cm.sup.3 /g to 0.36 cm.sup.3 /g,and an effective amount of customary galenic adjuvants.