Abstract: Process for the chemical treatment of lignocellulose materials, in particular of at least one piece of wood, characterized in that said materials are subjected to impregnation by a chemical agent comprising hydrocarbonaceous chains, this agent being chosen from mixed anhydrides, except for the mixed anhydride of acetic/benzoic acid, said agent being suitable for providing covalent grafting of a plurality of hydrocarbonaceous chains to said materials.

Abstract: Process for the chemical treatment of lignocellulose materials, in particular of at least one piece of wood, characterized in that said materials are subjected to impregnation by a chemical agent comprising hydrocarbonaceous chains, this agent being chosen from mixed anhydrides, except for the mixed anhydride of acetic/benzoic acid, said agent being suitable for providing covalent grafting of a plurality of hydrocarbonaceous chains to said materials.

Abstract: Process for the chemical treatment of lignocellulose materials, in particular of at least one piece of wood, characterized in that said materials are subjected to impregnation by a chemical agent comprising hydrocarbonaceous chains, this agent being chosen from mixed anhydrides, except for the mixed anhydride of acetic/benzoic acid, said agent being suitable for providing covalent grafting of a plurality of hydrocarbonaceous chains to said materials.

Abstract: Use of a material based on lignocellulose materials, in particular a piece of wood or sawdust, subjected to a process of chemical treatment of said lignocellulose materials, consisting in subjecting said materials to a treatment with a chemical agent comprising hydrocarbon-based chains, this agent being chosen from mixed carboxylic anhydrides, said agent being suitable for ensuring grafting by covalent bonding of a plurality of hydrocarbon-based chains onto said materials, as a material which reduces or even prevents the development of microorganisms, such as fungi or molds, capable of degrading said lignocellulose materials.

Abstract: A mechanical prosthetic heart valve, includes an annular support (12) on which at least two movable flaps (18, 20, 22) and several articular extensions (32, 34, 36) are arranged in an articulated manner. Each flap includes a central part (38) framed by two lateral wings that each cooperate with an articular extension by way of an end portion that has an articulation facet. The two articulation facets of each flap together make up a surface area of less than 5% of the total outer surface area of the flap.

Abstract: Use of a material based on lignocellulose materials, in particular a piece of wood or sawdust, subjected to a process of chemical treatment of said lignocellulose materials, consisting in subjecting said materials to a treatment with a chemical agent comprising hydrocarbon-based chains, this agent being chosen from mixed carboxylic anhydrides, said agent being suitable for ensuring grafting by covalent bonding of a plurality of hydrocarbon-based chains onto said materials, as a material resistant to xylophagous insects.

Abstract: The present invention concerns the use, in the surface treatment of waterproofed wood, of an aqueous dispersion comprising at least one latex obtained by emulsion polymerization of a mixture of monomers comprising at least one acrylic monomer B comprising at least one ureido function.

Abstract: Process for the chemical treatment of lignocellulose materials, in particular of at least one piece of wood, characterized in that said materials are subjected to impregnation by a chemical agent comprising hydrocarbonaceous chains, this agent being chosen from mixed anhydrides, except for the mixed anhydride of acetic/benzoic acid, said agent being suitable for providing covalent grafting of a plurality of hydrocarbonaceous chains to said materials.

Abstract: A window frame is formed of a plurality of plastic section pieces welded together at their ends. The ends of the plastic section pieces also have surfaces which abut one another. The plastic section pieces are not welded at the abutting surfaces. The unwelded abutting surfaces can therefore be used to define the length of the window frame.

Abstract: Total heart prosthesis including a casing implantable in the pericardial cavity, the geometry of which is similar to that of the natural heart, with a motor device inside the casing which essentially includes two membranes, one of which works during the elongation stroke within a space defining the right ventricle and the other of which works during the deformation stroke within a space defining the left ventricle. Blood bags are enclosed within the right and left ventricular spaces adapted to be connected to vessels of the circulatory system of a patient. The membrane of the right ventricle and a support associated therewith are mounted within the prosthesis casing such that the movement of the membrane during the elongation stroke (systole) is broken down into two phases, one of which is a displacement without elongation and the other, only, is accompanied with an elongation.