Abstract: A multiple electrophoresis method and device are disclosed for the controlled migration of macromolecules in gel plates stacked in a direction perpendicular to their plane, at least one series of electrodes (20) disposed at the intersections of two series of peripendicular planes, some perpendicular to the plates (12) and to the desired direction of migration of the macromolecules, the others perpendicular to the first and parallel to the plates (12), the electrodes being connected together selectively and controlled so as to provide both separation of the macromolecules in the plate (12) then transfer thereof to the membranes (22) associated with the plates (12).

Abstract: A method and apparatus for high speed temperature regulation of elements (12) in thermal contact with a fluid contained in liquid-vapor equilibrium inside an enclosure (10) which is closed in sealed manner and which is provided with thermal insulation, temperature regulation being provided by means of an external heat source (S) imposing a reference temperature (Tc) to the fluid contained inside the enclosure (10) and causing a corresponding variation in the temperature (Te) of the elements (12) by changing the phase of the fluid. The invention is particularly applicable to performing molecular biology reactions at controlled temperature.

Abstract: A multiple electrophoresis method and device are disclosed for the controlled migration of macromolecules in gel plates stacked in a direction perpendicular to their plane, at least one series of electrodes (20) disposed at the intersections of two series of perpendicular planes, some perpendicular to the plates (12) and to the desired direction of migration of the macromolecules, the others perpendicular to the first and parallel to the plates (12), the electrodes being connected together selectively and controlled so as to provide both separation of the macromolecules in the plate (12) then transfer thereof to the membranes (22) associated with the plates (12).