Abstract: A process for the preparation of kinetically stable semiconductor/polymer nanodispersion whereby the aqueous stability of the dispersed photocatalysts and polymer latex particles are ensured by the high surface charge. Consequently, the thin photocatalytically active antimicrobial coating prepared from this electrostatically stabilized aqueous dispersion by spray-coating method contains well-dispersed and evenly distributed surface photocatalyst particles immobilized by polymer and thus it provides homogeneous, transparent and mechanically stable photoreactive and antimicrobial thin film on arbitrary surfaces.

Abstract: An anhydrous transdermal composition is disclosed comprising in a 20 to 100% lyotropic liquid crystalline arrangement:5 to 15 weight % of optically active or racemic N-methyl-N-(1-phenyl-2-propyl)-2-propynylamine or N-methyl-N-{1-(4-fluorophenyl)-2-propyl}-2-propynylamine or a pharmaceutically acceptable salt thereof;40 to 70% by weight of liquid polyethylene glycol;10 to 20% by weight of solid polyethylene glycol;2 to 30% by weight of a nonionic surface active agent;2 to 20% by weight of propylene glycol, and if desired,0.5 to 2% by weight of a polymer, the a value of which is greater than 0.6, andoptionally, in an amount needed up to 100% an emulsifying agent.

Abstract: A graft lyotropic liquid crystalline composition having a viscosity less than 10 Pa.s comprising a low amount of surfactant(s), optionally co-surfactant(s), and/or solvents, optionally a polymer in relative stretched state and which is partly or totally penetrable by the medium and a solid material having a surface free energy of 18 to 240 mN/m.

Abstract: The invention relates to an emulsifiable microemulsion concentrate containing a phophoric acid ester and/or thiophosphoric acid ester as active ingredient. In addition to 20 to 80% by weight of active ingredient, the composition comprises: 7 to 70% by weight of a nonionic surface active agent, preferably a block copolymer with a molecular weight of 1000 to 10000 formed from polyethylene oxide and polypropylene oxide, an alkylphenol polyglycol ether, ethoxylated fatty alcohol or a mixture of nonionic surface active agents; 2 to 50% by weight of water; if desired, 1 to 50% by weight of a co-surfactant, preferably C.sub.1-8 straight or branched chain and/or cyclic alcohol, C.sub.3-8 straight or branched chain and/or cyclic ketone, esters of C.sub.1-6 fatty acids with C.sub.1-6 alcohols or the mixture thereof; and if desired, 15 to 30% by weight of a water-immiscible organic solvent.

Abstract: An apparatus for separating a slurry into phases containing larger and smaller grains has an upright tank in which a plurality of downwardly extending inlet pipes open at their lower ends between outlets for the coarse and fine phases located at the bottom and top of the tank, respectively. At the lower end of each inlet pipe, an upwardly widening frustoconical cup is provided with a bottom confronting the open end of the inlet pipe to deflect the slurry upwardly and outwardly. Within the cup swirl vanes impart a swirl to the slurry.

Abstract: A method of and apparatus for the mixing of a slurry in a tank having a conical bottom along the axis of the tank, and air-lift pipe is provided which is supplied at its lower end with compressed air to induce an upward flow of the slurry and air mixture through the pipe during start up of a mixing operation. Thus an injection is cut off when steady state is reached and air is injected at an upper level in the pipe located in the upper third of the length thereof but below the upper eighth for continuing mixing operation.