Abstract: A process for treating waste water containing chlorinated organic substances, particularly waste water from production of epichlorohydrin which contains more than 10 mg of adsorbable organic halogen compounds (AOX) per liter, comprising charging the waste water at a pH of 10 to 14 (measured at room temperature) into a reactor and maintaining a temperature of at least 75.degree.C., a pressure of at least 1 bar (abs.), and a residence time of at least 0.5 hours in said reactor, thereby partially dechlorinating and/or dehydrochlorinating chlorinated organic compounds contained in the waste water, and thereafter subjecting the waste water to further dechlorination and/or dehydrochlorination treatment in the presence of a hydrogen-containing gas, a hydrogen-releasing compound and/or a catalytically active material; and optionally subjecting the waste water to a biological treatment with the use of microorganisms; and apparatus for carrying out the foregoing process.

Abstract: A binder-containing granulated silicon carbide products for the manufacture of highly dense silicon carbide ceramic products and the SiC ceramic products which can be made from the novel granulated silicon carbide products, especially highly dense SiC high-performance pressurelessly sintered ceramics.

Abstract: Polycarbosilanes in which some of the silicon atoms have been replaced by a hetero element selected from boron, titanium, zirconium, hafnium, etc. The hetero elements are incorporated into the polycarbosilane skeleton in such a way that, like the silicon atoms, they are bonded to the other parts of the polycarbosilanes via hydrocarbon bridges, and the polycarbosilanes are free of hetero element-oxygen-silicon bonds.

Abstract: A process for depositing a layer containing boron and nitrogen on a substrate by decomposing one or more N-substituted borazoles in the presence of the substrate, in particular by a plasma CVD process.

Abstract: An aerosol generator useful as an atomizer for controllably and reproduci producing wet or dry aerosols for inhalation studies, including a nebulizer for producing an aerosol from a liquid and an air stream, a liquid dosing device such as a step dosing pump for controllably feeding a liquid to be atomized to the neubilizer, an apparatus such as a mass flow controller for regulating the flow of an air stream to the nebulizer to provide an amount needed to atomize the liquid, and optionally to dilute the resulting aerosol, a conduit for conveying the aerosol formed in the nebulizer to an aerosol exposure chamber, a measuring device such as a light-scattering diffusion photometer into which a sample of the aerosol is introduced for determining the concentration of the aerosol, and a control unit for controlling the liquid supply device and the adjustable air supply to produce an aerosol having a predetermined desired concentration; the control unit being operated either manually or by a computer responsive to me