Abstract: A device for the rapid qualitative and quantitative determination of the presence of a reactive ligand in a fluid.This device comprises a first reaction zone in which there is an at least temporarily impermeable membrane designed to receive a sample of test fluid and to be associated with at least one labeled reagent; a second reaction zone which is bounded on the one hand by the said membrane and on the other by a second at least temporarily impermeable membrane comprising a solid phase containing a reference reagent; and a third reaction zone which contains means for developing the reaction.A method for the rapid qualitative and quantitative determination of the presence of a reactive ligand in a fluid.Applications to the detection of the presence, in a biological fluid, of antibodies or antigens in particular.

Abstract: The invention relates to a process for the immunological quantitative determination of the T.sub.3 and/or T.sub.4 thyroid hormones.In a process for the immunological quantitative determination of T.sub.4 thyroxine and/or T.sub.3 triiodothyronine present in free form in a sample, T.sub.3 and/or T.sub.4 to be determined are put into competition with thyroglobulin for the sites of anti-T.sub.3 and/or anti-T.sub.4 antibodies present in a limited quantity, whereafter a determination is made of either the quantity of thyroglobulin fixed to the anti-T.sub.3 and/or anti-T.sub.4 antibodies, or the quantity of thyroglobulin not fixed to the anti-T.sub.3 and/or anti-T.sub.4 antibodies.Application to the determination of the total T.sub.3 and/or T.sub.4 of a biological sample.

Abstract: The invention relates to a process for the immunological quantitative determination of the T.sub.3 and/or T.sub.4 thyroid hormones.In a process for the immunological quantitative determination of T.sub.4 thyroxine and/or T.sub.3 triiodothyronine present in free form in a sample, T.sub.3 and/or T.sub.4 to be determined are put into completion with thyroglobulin for the sites of anti-T.sub.3 and/or anti-T.sub.4 antibodies present in a limited quantity, whereafter a determination is made of either the quantity of thyroglobulin fixed to the anti-T.sub.3 and/or anti-T.sub.4 antibodies, or the quantity of thyroglobulin not fixed to the anti-T.sub.3 and/or anbti-T.sub.4 antibodies.

Abstract: A polymer articular prosthesis having a sliding surface, wherein the latter is constituted by a thin layer of said polymer grafted with tetrafluoro-ethylene.The process for preparing the articular prosthesis comprises coating with a protective varnish the outer surface of a polymer articular prosthesis having a sliding surface, except in the areas constituting this sliding surface irradiating the prosthesis with ionizing rays, contacting the prosthesis with the tetrafluoroethylene vapour for adequate time to bring about tetrafluoroethylene grafting over a limited thickness of the polymer forming the sliding surface and then removing the protective varnish.

Abstract: Inert cross-linked copolymer able to absorb and then progressively release a pharmaceutically active substance, wherein it is constituted by a powder of a cross-linked copolymer comprising30 to 80% by weight of monounsaturated alkyl acrylate and/or methacrylate;5 to 68% by weight of acrylic and/or methacrylic acid; and2 to 15% by weight of bifunctional or trifunctional acrylate and/or methacrylate.A mixture of monounsaturated alkyl acrylate and/or methacrylate, acrylic and/or methacrylic acid, and bifunctional or trifunctional acrylate and/or methacrylate monomers is polymerized in accordance with a free radical polymerization mechanism.The support is used for the preparation of a delayed action or release medicament.

Abstract: Inert cross-linked copolymer able to absorb and then progressively release a pharmaceutically active substance, wherein it is constituted by a powder of a cross-linked copolymer comprising30 to 80% by weight of monounsaturated alkyl acrylate and/or methacrylate;5 to 68% by weight of acrylic and/or methacrylic acid; and2 to 15% by weight of bifunctional or trifunctional acrylate and/or methacrylate polymerized in accordance with free radical polymerization mechanisms.