Abstract: The invention concerns a particle for recovering an anion from an aqueous solution comprising a magnetic material associated with a silica based layer forming a magnetic microparticle with a silica based surface, and a layered double hydroxide deposited on the surface of the microparticle. The invention further concerns a method for manufacturing a magnetic particle comprising mixing a magnetic microparticle with a silica based surface in an aqueous solution at about pH 7 with a dispersion of layered double hydroxide at about pH 7 to obtain a mixture, and ultrasonicating the mixture for depositing the layered double hydroxide on the surface of the microparticle. In addition, the invention concerns various uses of the particle.

Abstract: A portable electric fan assembly for indoor use includes a base member, an upright electric motor mounted in the base member, an upstanding neck extending from the base member, a substantially vertical drive shaft couple to the motor extending within the upstanding neck, a fan head assembly carried by the neck and having at least a part thereof mounted for limited angular movement so as to be settable at a desired orientation, a fan blade shaft carrying a ban blade protruding forwardly from the movable part of the fan head assembly, and a coupling arrangement for drivably coupling the fan blade shaft to the drive shaft.

Abstract: A supported catalyst suitable for nitrogen oxide reduction has an active catalyst coating containing metal oxides, which has been produced by a sol-gel process, on a solid porous supporting body.

Abstract: A description is given of sensors in in the form of field effect transistors and capacitors which are suitable for qualitatively and quantitatively determining species to be analyzed, for example molecules or ions, in liquid or gaseous media. A special field of application is the selective determination of the presence and concentration of gases. The sensors are defined in that they have a sensitive layer consisting of a heteropolysiloxane.