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Abstract

An apparatus for enhancing the contact frequency between two reactants capable of binding to one another, preferably between an analyzer molecule and an analyte molecule, especially for enhancing the binding effectiveness in bioanalysis arrays with the aid of micro- or nanomagnetic particles (75) set in motion in a controlled manner in the fluid reaction medium by means of magnetic fields generated by variably feedable electromagnets (3, 2, 20) arranged on both sides of the reaction fluid film. On one side of a reaction fluid film, especially of a microscope slide (4) comprising the reactants (63), the reaction liquid (70) comprising the reactants (73) and preferably a glass plate (5) covering the microbioanalysis array (6), is arranged close to a two-dimensional matrix (20) having a multitude of miniature or millimagnetic coils (2) feedable individually with magnetization current of variable strength and/or voltage as a function of time--corresponding to a time-dependent variable magnetization pattern desired in each case--and, on the other side of the reaction vessel, especially the microscope slide (4) with the (micro)bioanalysis array (6), in whose vicinity is positioned only one magnetic coil (3) likewise feedable with variable magnetization current and whose magnetic field permeates the entire reaction vessel, especially the microbioanalysis array (6).

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