摘要:
The invention concerns a bioactive prosthesis comprising a support coated with a polymer layer with reactive functions, and a bioactive substance fixed on the prosthesis via said reactive functions so as to be gradually released on a site for implanting the prosthesis. Such prostheses are useful in the field of cardiology to avoid for example restenosis resulting from implantation of stents in coronary arteries.
摘要:
The invention concerns a bioactive prosthesis comprising a support coated with a polymer layer with reactive functions, and a bioactive substance fixed on the prosthesis via said reactive functions so as to be gradually released on a site for implanting the prosthesis. Such prostheses are useful in the field of cardiology to avoid for example restenosis resulting from implantation of stents in coronary arteries.
摘要:
The production of hollow membranes (10) in which two support layers (12a, 12b) are arranged one above the other and supported by a plurality of capillary tubes (14), the assembly being formed by an organic polymer, has been optimized. In particular, since the material forming the assembly is polymerized in a number of polymerization steps (6i), the membrane has a structure close to that of organic systems, and forms capillary ducts (14) for the flow of a first fluid, the space between the capillary tubes (14) and the support layers (12) forming an internal cavity (16) for the flow of a second fluid. The membranes (10) thus produced can be assembled as fluid treatment modules with intermediate porous plates.
摘要:
Fabrication of films comprising within their thickness at least two superimposed areas of which one is a semi-metallic area and the other is an electrically isolating area, by irradiation of a polymer film by means of a beam of energetic ions. By implementing such method it is possible to form semi-metal (1)/insulation (2)/semi-metal (3) structures by irradiating the polymer under vacuum conditions by means of light ions or ions having a low stopping power, having an energy of at least 1 MeV/u.m.a. It is also possible to obtain isolation (4)/semi-metal (5)/insulation (6) structures by irradiating the polymer, in a confined atmosphere, by means of heavy ions or ions with a high energy loss, having an energy of at least 1 MeV/u.m.a. By irradiating only certain areas of the film it is thus possible to form buried or surface electric connections.
摘要:
The invention concerns a hollow membrane (11) comprising two support-layers arranged one above the other providing between them a plurality of capillary tubes arranged between the support-layers forming capillary channels for allowing a first liquid to flow, the space between the capillary tubes forming an internal cavity for a second liquid to circulate around the capillary tubes, and the whole assembly being constituted by an organic polymer. Said membranes (11) can be assembled into modules with porous intermediate plates (13) for treating fluid.
摘要:
The invention concerns a hollow membrane (11) comprising two support-layers arranged one above the other providing between them a plurality of capillary tubes arranged between the support-layers forming capillary channels for allowing a first liquid to flow, the space between the capillary tubes forming an internal cavity for a second liquid to circulate around the capillary tubes, and the whole assembly being constituted by an organic polymer. Said membranes (11) can be assembled into modules with porous intermediate plates (13) for treating fluid.
摘要:
Fabrication de films comportant dans leur épaisseur au moins deux zones superposées dont une zone à caractère semi-métallique et une zone à caractère isolant électrique, par irradiation d'un film de polymère au moyen d'un faisceau d'ions énergétiques. On peut former par ce procédé des structures semi-métal (1)/isolant (2)/semi-métal (3) en irradiant le polymère sous vide au moyen d'ions légers ou de faible pouvoir d'arrêt, ayant une énergie d'au moins 1 MeV/u.m.a. On peut aussi obtenir des structures isolant (4)/semi-métal (5)/isolant (6) en irradiant, en atmosphère confinée, le polymère au moyen d'ions lourds ou de grande perte d'énergie, ayant une énergie d'au moins 1 MeV/u.m.a. En irradiant seulement certaines zones du film on peut ainsi former des connexions électriques enterrées ou en surface.