Abstract: The invention concerns a method for isolating and purifying a protein of interest, in particular from a complex medium such as a plant extract. Said method is characterized in that it compromises a step whereby a complex medium, comprising the solution containing the protein of interest to be purified and a solid support capable of enabling it absorption, is brought in the presence of an agent capable of causing said protein to precipitate in soluble form. The protein of interest is thus partly aggregated and absorbed on the solid support without substantial formation of macro-aggregates in the solution capable of spontaneous elutriation.

Abstract: A dynamic insulation wall element for use in a building to improve in natural manner the comfort of the building with respect to temperature, sound level, air flow, and humidity, the element being constituted by a composite plate having at least one layer made of a thermally insulating material that is provided with spacers on at least one of its faces, the spacers defining an air passage in at least two directions parallel to the plate for causing air to enter and flow within the building, wherein the composite plate further includes a layer that is strong and hydrophilic and that is disposed against the spacers of the layer of thermally insulating material.