Abstract: A multiple electrophoresis method and apparatus for migrating and transferring macromolecules in a vessel (10) containing a plurality of parallel elongate electrodes (14), membranes (22) disposed vertically in the vessel between the columns of electrodes (14), and an electrophoresis gel which is inserted in the vessel in liquid form and which is subsequently solidified to perform electrophoresis. When the electrophoresis is completed, the gel is liquefied, dissolved, or decomposed, and the membranes (22) onto which the macromolecules have been transferred are withdrawn from the vessel.

Abstract: A cell culture device is disclosed where cells are confined in a liquid medium within a cell culture space. The cell culture space is delimited by at least three selectively permeable walls. One wall is formed by a sheet of tubes and is permeable to fresh nutrient medium, the second wall is formed of a layer of capillaries and is permeable to gaseous fluids, and the third wall acts as a micron sieve that allows the passage of spent nutrient medium, but retains the cells within the cell culture space. The cell culture device makes it possible to produce culture products, continuously and in bulk over a long period of time.