Abstract: A multilayer formed part having acoustic damping properties is composed of a binder containing carrier fibrous web of natural fibers and/or synthetic fibers of low compression, which is covered at both sides with cover layers and/or decorative layers. The carrier fibrous web across the surface thereof is interlaced with prismatic regions of any suitable cross section, with prismatic regions having increased strength and not being connected with each other, and being connected to the covering layer and/or the decorative layer in a shearing resistant manner.

Abstract: Aqueous solutions containing peroxodisulfate ions are described for the preparation of medicaments for the treatment of malignant cells of human and animal bodies. Furthermore, a process for the preparation of the agent and a device for carrying out the process are described. The agents are available, for instance, by actinic irradiation of aqueous solutions containing anions of oxygen acids of sulfur, particularly sulfate ions and/or peroxodisulfate ions, and having a pH-value of from 2 to 7.

Abstract: A self-optimizing control method for optimizing the fuel/air ratio under non-steady conditions in an internal combustion engine is described; in this method, a probe is provided both before and after the catalyst. Control quantities and the time during which the post catalyst probe shows an undesirable fuel/air ratio are stored for certain specified engine-operating conditions in the non-steady range. When the same engine operating condition is repeated, reference is made to the stored control quantities and time and the control quantity is varied in the direction of the correct fuel/air ratio. The time now obtained is compared with the stored time and, if the time has decreased, the new control quantity and the new time are stored. The control values are iteratively corrected by repeating these procedures, when the same engine operating condition reappears, until the time reaches a minimum.