Abstract: The subject of the invention is the use of selected polyelectrolytes from the group of synthetic and natural polyelectrolytes for the cryopreservation of human and animal extracellular vesicles. The invention also relates to a method for the cryopreservation of these vesicles, which uses said poly electrolytes.

Abstract: A method of dispensing a metallic nanoparticle composition along a trajectory on a substrate is disclosed. The composition is dispensed from a nozzle through its outlet. The outlet is characterized by an outlet size. First, an initial pressure is applied to the composition in the nozzle to cause the composition to flow from the outlet. The nozzle is positioned at a height such that the composition does not flow onto the substrate. Second, the nozzle is lowered toward the substrate such that a fluid bridge forms between the outlet and the substrate and an adjusted pressure is applied to the composition in the nozzle. The adjusted pressure is lower than needed for the composition to continue to flow from the outlet. Third, the fluid is dispensed from the nozzle. A dispensing pressure is applied to the fluid while the nozzle is laterally displaced along the trajectory on the substrate.

Abstract: A set of profiles for forming complex profiles comprises two profiles, namely a first profile (10) and a second profile (20), adjoining each other and having walls surrounding a main chamber. Each profile (10, 20) of the set has an outer shape which may be inscribed into a triangle, and has an inner wall (12, 22) with a faying face (13, 23) without protruding fragments. The faying faces (13, 23) adjoining each other, after being coated with adhesive enable a joint to be created when the complex profile is discussed, however, in the case of the set of the profiles they are considered to be contact surfaces.

Abstract: A set of profiles for forming complex profiles comprises two profiles, namely a first profile (10) and a second profile (20), adjoining each other and having walls surrounding a main chamber. Each profile (10, 20) of the set has an outer shape which may be inscribed into a triangle, and has an inner wall (12, 22) with a faying face (13, 23) without protruding fragments. The faying faces (13, 23) adjoining each other, after being coated with adhesive enable a joint to be created when the complex profile is discussed, however, in the case of the set of the profiles they are considered to be contact surfaces.