Abstract: The present invention relates to a process for preparing a rapidly or very rapidly dissolving tablet comprising an at least freely soluble solid form of an active pharmaceutically ingredient (API). The tablet comprises a granulate comprising said at least freely soluble solid form of an active pharmaceutically ingredient in form of granules, and a tablet base, with the granules exhibiting a certain minimum size, and the tablet base comprising a disintegrant. The process comprises a step of mixing the API-containing granulate with the tablet base, followed by a step of compressing the mixture to form the tablet. The present invention also relates to a rapidly or very rapidly dissolving tablet comprising an at least freely soluble solid form of an API, wherein said tablet comprises a mixture of API-containing granulate comprising API-containing granules, and a disintegrant-containing tablet base, with the granules exhibiting a certain minimum size.

Abstract: In a known process for producing a quartz glass cylinder, a porous soot tube, which is sintered to form the quartz glass cylinder, is produced by depositing SiO2 particles on an outer cylindrical surface of a support, which rotates about the longitudinal axis thereof and has a layer of silicon carbide (SiC layer). In order on this basis to specify a support having a high resistance to fracture, which firstly can easily be removed and which secondly presents a low risk of contamination for the soot body, the invention proposes that the SiC layer is treated at a high temperature in an oxygen-containing atmosphere before the SiO2 particles are deposited, in such a manner that an SiO2 protective layer having a thickness of at least 0.1 ?m is produced by oxidation.

Abstract: In a known process for producing a quartz glass cylinder, a porous soot tube, which is sintered to form the quartz glass cylinder, is produced by depositing SiO2 particles on an outer cylindrical surface of a support, which rotates about the longitudinal axis thereof and has a layer of silicon carbide (SiC layer). In order on this basis to specify a support having a high resistance to fracture, which firstly can easily be removed and which secondly presents a low risk of contamination for the soot body, the invention proposes that the SiC layer is treated at a high temperature in an oxygen-containing atmosphere before the SiO2 particles are deposited, in such a manner that an SiO2 protective layer having a thickness of at least 0.1 ?m is produced by oxidation.