Abstract: A method for processing a cosmetic product with high hydrostatic pressures by applying a pressure P to the cosmetic product, with a continuous or cyclic application mode MA. The method is performed using at least one, and preferably all, of the following parameters: total application time t of pressure P of between 2 and 60 minutes, a pressure P of between 200 MPa and 600 MPa, a pressure application rate, for a compression VA, of between 1 and 5 QMPa/s, a decompression rate VAD of between 1 and 50 MPa/s, when the application mode is cyclic, a latency time tlat applied before the first cycle and/or between certain cycles and/or between each cycle, and an initial temperature of between ?10° C. and 40° C. Also, the cosmetic product obtained and a device for implementing. The method can be used to deactivate microorganism(s) in pharmaceutical product or to modify the texture of the same.

Abstract: A method for the treatment of breast milk, which includes at least two cycles, each cycle includes subjecting the medium to a maximum pressure of between 200 and 400 MPa with a compression speed of between 0.5 and 8 MPa·s?1 and a decompression speed of between 0.5 and 100 MPa·s?1, the initial temperature of the medium being between 25° C. et 50° C. Also, the use of the method, the resulting product and the use thereof in order to meet the nutritional and metabolic requirements of premature babies and nursing infants.

Abstract: The invention concerns a method for making a diamond-coated composite material comprising deposition on a substrate of an intermediate layer and deposition on the intermediate layer of a diamond coating. The invention is characterised in that the intermediate layer is an expansible layer capable of producing chemical bonds with the substrate while chemically developing during deposition of the diamond coating. The invention is applicable to a large number of articles and components made of diamond composite.

Abstract: The invention concerns a method for sterilising at least a sensitive active principle, characterised in that said at least active principle is treated at pressure levels ranging between 3000 and 6000 bars and at temperatures ranging between −30° C. and +25° C. The method consists in treating directly the active principle in the pulverulent medium wherein it is contained.

Abstract: Chemical transformation of complex chemical structures in a supercritical medium.The transformation of one or more chemical structures (20) involves at least one reduction reaction in a solvent (22) in the supercritical state.Application to the destruction of dangerous products, the treatment of industrial effluents and natural products and the modification of molecular structures.

Abstract: The present invention relates to synthetic phyllosilicates having a lamellar structure of the type T--O--T devoid of OH.sup.- and F.sup.- ions. Said phyllosilicates are very resistant to oxidation and possess a high thermal stability. The invention further relates to a process for the preparation of said phyllosilicates.

Abstract: Particulate compositions of rare earth oxides wherein the particles are present in the form of single crystals of homogeneous size and morphology, the dimensions of which are less than or equal to 10 .mu.m and greater than approximately 0.05 .mu.m and that at least 80% of the particles have dimensions varying within a range of x.+-.0.2 x, x being the mean dimension of the particles of the composition under consideration, with the understanding that the variation of the range of .+-.0.2 x is not less than .+-.0.1 .mu.m.

Abstract: A process for producing cubic boron nitride comprises heating at an elevated temperature and under high pressure a source of boron and a source of nitrogen in the presence of a fluoronitride or a source of fluoronitride.

Abstract: Process for making a novel ferromagnetic chromium dioxide and rhodium dioxide material in the form of a solid solution Cr.sub.1-x Rh.sub.x O.sub.2 where x is a number between 0 and 0.5.It essentially comprises oxidation, under suitable conditions of temperature and pressure, of hydrated or anhydrous Cr.sub.2 O.sub.3 or of a precursor of Cr.sub.2 O.sub.3, in the presence of (1) an appropriate amount of a compound of rhodium III able to give RhO.sub.2 under reaction conditions and (2) of an oxidizing agent consisting of an oxygenated compound free from metallic cations other than chromium and having, under the reaction conditions, a partial oxygen pressure at least equal to that corresponding, under the same conditions of temperature and pressure, to the equilibria Cr.sub.2 O.sub.3 +1/2O.sub.2 .revreaction.2CrO.sub.2 and Rh.sub.2 O.sub.3 +1/2O.sub.2 .revreaction.2RhO.sub.

Abstract: Chromium dioxide CrO.sub.2 is prepared by oxidizing hydrated trivalent chromium oxide Cr.sub.2 O.sub.3, xH.sub.2 O, where x is at least 1, at a temperature of at least 350.degree. C and under pressures of at least 2 kilobars. The reaction is carried out in an oxidizing medium, which is a solid or an aqueous liquid solution, essentially constituted by a compound of the formula HXOy, zH.sub.2 O, wherein X represents an atom of chlorine or iodine, y is a positive integer less than or equal to 4, and z is a number which is a function of the dilution of said compound in the solution or a function of the crystallization water in the case of a solid oxidizing agent.The product is useful in any device requiring a compound which is ferromagnetic at a temperature less than 116.degree. C and notably in magnetic tapes.