Abstract: A device and a method are provided for the analysis of a sample plate on which at least two material samples are situated. In the method, one impedance spectrum is measured for each of the material samples. As a function of the respectively measured impedance spectrum, a configuration of a circuit equivalent is determined which includes at least one electronic component. Then, for an error minimization computation, starting values for the components of the respective circuit equivalents are determined. In the error minimization computation, a theoretical impedance spectrum is calculated for at least one of the material samples, based on the impedance spectrum measured for the material sample, as well as the starting values for the components of the respective circuit equivalent, and fit values are determined for the components of the respective circuit equivalent.

Abstract: A method for producing at least one local coating on a substrate is provided, as well as a combinatory substrate having such a local coating, a mask that is removable in a non-destructive manner being arranged on the substrate in a first step; the mask having at least one perforation, the perforation being at least partially filled with a reactive solution in a second step; and a coating reaction of the reactive solution with the substrate surface being induced in a third step to form the local coating.

Abstract: A device and a method are provided for the analysis of a sample plate on which at least two material samples are situated. In the method, one impedance spectrum is measured for each of the material samples. As a function of the respectively measured impedance spectrum, a configuration of a circuit equivalent is determined which includes at least one electronic component. Then, for an error minimization computation, starting values for the components of the respective circuit equivalents are determined. In the error minimization computation, a theoretical impedance spectrum is calculated for at least one of the material samples, based on the impedance spectrum measured for the material sample, as well as the starting values for the components of the respective circuit equivalent, and fit values are determined for the components of the respective circuit equivalent.

Abstract: A device for mixing at least two media, in particular highly viscous media, having at least one mixing chamber, its volume in a mixer housing being variable by a movable plunger, and having at least one mixing tool. With the aid of an actuator, the mixing tool is insertable into the mixing chamber for mixing the media and is retractable from the mixing chamber following the mixing.

Abstract: A method and a sensor for determining acidic gases in gas mixtures, such as hydrogen chloride, sulfur dioxide, or nitrogen dioxide. A polymer layer whose electrical conductance changes under the effect of the gas to be determined is exposed to the gas mixture, and the electrical conductance, the electrical resistance, or the impedance of the polymer layer is determined. For the desorption of the gas to be determined, the polymer layer is heated at certain time intervals to a temperature above ambient temperature.

Abstract: A method for producing at least one local coating on a substrate is provided, as well as a combinatory substrate having such a local coating, a mask that is removable in a non-destructive manner being arranged on the substrate in a first step; the mask having at least one perforation, the perforation being at least partially filled with a reactive solution in a second step; and a coating reaction of the reactive solution with the substrate surface being induced in a third step to form the local coating.

Abstract: A filter device and a method for cleaning gas mixtures containing particles, e.g., soot-containing exhaust gases of internal combustion engines, as well as a method for the manufacture of the filter device, are provided. The filter device has a porous surface made of a filter base material exposed to the gas mixture to be cleaned. A layer of ceramic fibers is applied onto the surface exposed to the gas mixture to be cleaned.