Abstract: An acoustic tile comprising a perforated support wherein one of the faces is covered on its entire surface with a nonwoven material, characterized in that the material is coated on at least one face by a photocatalytic composition comprising at least one photocatalyst agent.

Abstract: The invention relates to a process for treating gaseous effluents according to which said effluents are subjected to simultaneous treatment by cold plasma and to the action of a photocatalyst under additional ultraviolet (UV) radiation, as well as a device for the implementation of such a process.

Abstract: Filtering medium based on activated carbon which is characterized in that it comprises three superposed layers, respectively an inner layer and two outer layers, the inner layer consisting of 80 to 95% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, the first outer layer comprising from 45 to 95% by dry weight of organic and/or inorganic chemical fibres, the balance for 100% consisting of activated carbon and/or of a material having a density of less than 0.9, the second outer layer comprising from 5 to 25% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, and in that the weight of the inner layer is between 40 and 200 g/m2 and the weight of the outer layers is between 10 and 100 g/m2.

Abstract: The present invention relates to an enclosed building designed to store foul-smelling effluents. The building is provided with means for introducing the effluents in the building, means for destroying, by photocatalysis, organic pollutants created during the storage of the effluents, and openings, by means of which the interior of the building is in communication with the atmosphere, the openings being provided with said destroying means.

Abstract: The invention concerns a filtering medium based on a photocatalytic agent and activated carbon, characterized in that it comprises a permeable support covered with a first layer based on activated carbon, then a separate second layer based on a photocatalytic agent, or vice versa. The invention also concerns a method for making such a filtering medium.

Abstract: A plant protection device characterised in that it has the form of a tube consisting at least of one parchmentized or vulcanized fibrous support in the form of a sheet, the device being biodegradable.

Abstract: Methods for forming substrates having a powder are provided. The powder may be applied to the substrate by means of a rotating drum and a cooperating blade that dispenses the powder on to the substrate. The method may be used to dispense compositions for protecting plants, including, for example, fruits, vegetables, plants, and flowers, against decay. The method may include the application of an adhesive to the substrate into which the powder applied. The powder may be a mixture that includes at least one substance capable of adsorbing ethylene released by the plant, and at least one substance, an oxidizing agent, capable of degrading ethylene. The powder mixture may be in the form of individualized grains embedded in the adhesive layer. Part of the grain surface remains outside of the adhesive layer, for example, to thereby make the powder grains active in the degradation of ethylene.

Abstract: A biodegradable fibrous support for soil mulching, characterized in that it is provided with a reinforcing means in the form of a grid, which is either maintained on the whole or part of at least one face of the support, or incorporated into the whole or part of the mass of the support.

Abstract: Biodegradable fibrous support for soil mulching, characterized in that it further contains biodegradable thermobonding fibres distributed into the mass.

Abstract: Filtering medium based on activated carbon which is characterized in that it comprises three superposed layers, respectively an inner layer and two outer layers, the inner layer consisting of 80 to 95% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, the first outer layer comprising from 45 to 95% by dry weight of organic and/or inorganic chemical fibres, the balance for 100% consisting of activated carbon and/or of a material having a density of less than 0.9, the second outer layer comprising from 5 to 25% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, and in that the weight of the inner layer is between 40 and 200 g/m2 and the weight of the outer layers is between 10 and 100 g/m2.

Abstract: A photocatalytic composition includes at least a photocatalyst agent and at least an inorganic binding agent, characterized in that the inorganic binding agent includes an aqueous colloidal silica dioxide (SiO2) dispersion, the aqueous colloidal silica dioxide dispersion including particles capable of being bound to one another after coating the photocatalyst agent.

Abstract: A photocatalytic composition includes at least a photocatalyst agent and at least an inorganic binding agent, characterized in that the inorganic binding agent includes an aqueous colloidal silica dioxide (SiO2) dispersion, the aqueous colloidal silica dioxide dispersion including particles capable of being bound to one another after coating the photocatalyst agent.

Abstract: Accelerated degradation of mulching paper, formed from cellulose fibers impregnated with a hydrophobic resin to provide weather resistance, comprises spraying the paper with an enzyme solution which degrades both the resin and the cellulose.

Abstract: The invention concerns a permeable material containing a fibrous composition consisting of organic and/or inorganic fibres characterised in that it further contains between 0.1 and 10 g/m2, advantageously 1 g/m2 of activated carbon fibres whereon is adsorbed a germicidal agent.

Abstract: A photocatalytic composition includes at least a photocatalyst agent and at least an inorganic binding agent, characterized in that the inorganic binding agent includes an aqueous colloidal silica dioxide (SiO2) dispersion, the aqueous colloidal silica dioxide dispersion including particles capable of being bound to one another after coating the photocatalyst agent.

Abstract: Accelerated degradation of mulching paper, formed from cellulose fibers impregnated with a hydrophobic resin to provide weather resistance, comprises spraying the paper with an enzyme solution which degrades both the resin and the cellulose.

Abstract: The invention concerns a filtering medium based on a photocatalytic agent and activated carbon, characterized in that it comprises a permeable support covered with a first layer based on activated carbon, then a separate second layer based on a photocatalytic agent, or vice versa. The invention also concerns a method for making such a filtering medium.

Abstract: Accelerated degradation of mulching paper, formed from cellulose fibers impregnated with a hydrophobic resin to provide weather resistance, comprises spraying the paper with an enzyme solution which degrades both the resin and the cellulose.

Abstract: Process for the purification of gaseous effluents by a photocatalytic reaction, according to which, under ultraviolet radiation in a single stage, the gaseous effluent is subjected to movements by which at least one first substrate is lapped and by which a second substrate is traversed, the said first substrate and the said second substrate being covered with at least one photocatalysing agent. Plant for the implementation of the process.

Abstract: The present invention relates to compositions for protecting plants, including, for example, fruits, vegetables, plants and flowers, against decay, and methods of making the compositions. A composition according to the invention includes a substrate coated with an adhesive layer, the surface of the adhesive layer covered with a film comprising a powder mixture that includes at least one substance capable of adsorbing ethylene released by the plant, and at least one substance, an oxidizing agent, capable of degrading ethylene. In order to reduce the quantity of powder needed to protect plants, the powder mixture is in the form of individualized grains existing as a film at surface of the adhesive layer. Part of the grain surface remains outside of the adhesive layer, thereby making the grain active toward the degradation of ethylene.