Abstract: A method is described for non-destructive measurement of vitality of biological cells, especially for determination of apoptosis, in which the at least one cell is exposed to high-frequency alternating, especially rotating, electric fields and/or impedance test fields, and at least one rotation measurement, one dielectrophoresis measurement and/or one impedance measurement is performed with the cell for at least one frequency range or individual frequencies, from which at least one measurement parameter is determined that is characteristic of the vitality state of the cell.

Abstract: A method for the prevention of the adhesion of particles, in particular cells and cellular components in solution to surfaces, characterized in that to the solution is added at least one polyalcohol.

Abstract: A method for the prevention of the adhesion of particles, in particular cells and cellular components in solution to surfaces, characterized in that to the solution is added at least one polyalcohol.

Abstract: Disclosed is a method for measuring properties of particles that move through a fluidic microsystem, the particles being suspended in a liquid. According to the inventive method, a first parameter of a specific particle is first measured at a first test station (11). A second parameter of the particle is then measured at an interval from the first measurement at a second test station (12) which is spatially separated from the first test station (11), and the first and second parameters are jointly evaluated in a correlated manner, the first and second parameters being characteristic of different properties of the tested particle. The evaluation comprises a comparison of the first and second parameters with predetermined expected values. Another measurement is taken or manipulations are performed on the tested particle according to the result of the comparison. Also disclosed is a fluidic microsystem that is designed for implementing the inventive method.

Abstract: The invention relates to an method of analysing biological particles, in particular to be conducted in a cell sorter, with following steps: placing the particles to be analysed into a carrier flow, carrying out a first analysis of the particles moving with the carrier flow, selecting at least one particle in dependence on the result of the first analysis, carrying out a second analysis of the selected particle in a decelerated condition. Furthermore, the invention comprises a corresponding analysis device.

Abstract: A method for the prevention of the adhesion of particles, in particular cells and cellular components in solution to surfaces, characterized in that to the solution is added at least one polyalcohol.

Abstract: To manipulate microparticles in a fluid that intersects a first channel or several first channels as a stream, one or more microparticles (14) are exposed to electrical field barriers that change their direction from the direction of flow toward the edge of the flow to a lateral hole (17) of the respective first channel. As a result, microparticles can be moved back and forth between streaming fluids. Preferred applications include treatment, separating, sorting or confinement procedures.

Abstract: A method is described for non-destructive measurement of vitality of biological cells, especially for determination of apoptosis, in which the at least one cell is exposed to high-frequency alternating, especially rotating, electric fields and/or impedance test fields, and at least one rotation measurement, one dielectrophoresis measurement and/or one impedance measurement is performed with the cell for at least one frequency range or individual frequencies, from which at least one measurement parameter is determined that is characteristic of the vitality state of the cell.

Abstract: An electroporation and/or fusion treatment of microscopic objects occurs in a medium between at least two electrodes, with the electrodes being miniaturized electrodes in a microsystem with a channel structure which is set up for the flow-through of the medium with the objects.