Abstract: A process for the preparation of dimethyl ether by catalytic dehydration of methanol, in which there is used a catalyst based on a zeolite immobilized on a silicon carbide support, for example a zeolite of type ZSM-5 supported on silicon carbide extrudates or on a silicon carbide cellular foam.

Abstract: The invention concerns a method for obtaining a metal implant for open porosity tissue support and/or replacement, characterized in that it comprises the following steps: (i) selecting a mould, (ii) arranging in the mould a solid metal core (7), (iii) filling the volume of the mould (1) still available with a powder of microspheres (3), (iv) consolidating the microspheres (3) with each other as well as with said at least one solid core (7) by electrical discharge sintering.

Abstract: The present invention relates to a valve device designed to be implanted in a dysfunctional larynx or in a prosthetic larynx. The valve device has a distal portion forming an annular support structure and a central portion forming an obturator. The obturator includes i) a peripheral part forming a first valve integral with the annular support structure in a first hinge region, and ii) a central part forming a second valve integral with the first valve in a second hinge region.

Abstract: The invention relates to dendritic chelated compounds, to methods for producing the same and to pharmaceutical compositions containing the same. The dendritic chelated complexes of the present invention have the following formula (I): [[MC]En-[D]m-X1p1X2p2X3p3X4p4]z?zB+ (I), where m is a magnetic or scintigraphic marker, C is a chelating agent of the marker M, E is a spacer, n=0 or 1, D is compound capable of forming a dendritic structure, m is an integer equal to 1 or 2 or 4, X1 is a group increasing the complex lipophily, p1 is an integer from 0 to 12, X2 is a group increasing the complex specificity for a particular organ, p2 is an integer equal to 1 or 2 or 4, X3 is a group having a therapeutic activity, p3 is an integer equal to 0, 1, 2 or 4, X4 is a CH3 group, p4 is an integer from 0 to 12, B is a counter-ion, z is an integer equal to 0, 1, 2, 3 or 4. The invention can be used in the field of pharmacy, more precisely in medical imaging.

Abstract: The invention relates to a novel discriminating molecule family for neutron and gamma radiation, and to the preparation method thereof. Said molecules are also useful for detecting radiation (X, gamma, electrons, protons, ions), and thus for manufacturing radar, and industrial or medical dosimetry instruments.

Abstract: The present invention relates to a delivery system based on a film of an imine forming liquid crystalline phase, mixed with at least with one biologically active substance, to which a constant or variable electric field can be applied. The delivery system can be used as a delivery system for biologically active substances such as flavors, fragrances, bactericides, fungicides, insecticides, insect attractants or repellents, agrochemicals or pharmaceuticals.

Abstract: The present invention relates to a delivery system in the form of a dynamic mixture obtained by reacting together, in the presence of water, at least one hydrazine derivative with at least one perfuming, flavoring, insect repellent or attractant, bactericide or fungicide aldehyde or ketone. The inventive mixture is capable of releasing in a controlled and prolonged manner the aldehyde or ketone in the surrounding environment. Furthermore, the present invention concerns also the use of these dynamic mixtures as perfuming ingredients as well as the perfuming compositions or perfumed articles that include such mixtures.

Abstract: The invention relates to a novel discriminating molecule family for neutron and gamma radiation, and to the preparation method thereof. Said molecules are also useful for detecting radiation (X, gamma, electrons, protons, ions), and thus for manufacturing radar, and industrial or medical dosimetry instruments.

Abstract: A computer-based method for identifying at least one pair of similar chemical reactions between a plurality of reactions each related to preparation of at least one product from at least one reagent may include generating for each reaction a structural representation involving dynamic and conventional bonds and, based on the this structural representation, generating for each reaction a set of fragment descriptors of a predetermined length comprising the dynamical bonds and a corresponding descriptor vector. The method may further include calculating similarity indices between descriptor vectors of the plurality of reactions and comparing the similarity indices to identify at least one pair of similar reactions.

Abstract: A method of preparing a solid material based on tangled nanotubes and/or nanofibers, includes a step of growing carbon nanofibers and/or nanotubes with restraint in a contained reactor; and the materials thus obtained. The different uses of the materials are also disclosed.

Abstract: The present invention relates to the formation of hydrogels based on guanosine hydrazide derivatives in the presence of cations. The hydrogels can be used as a carrier/delivery system for biologically active substances such as flavors, fragrances, insect attractants or repellents, bactericides, fungicides, pharmaceuticals or agrochemicals.

Abstract: The present invention relates to a valve device designed to be implanted in a dysfunctional larynx or in a prosthetic larynx, said device comprising a distal portion forming an annular support structure and a central portion forming an obturator, characterized in that said obturator comprises i) a peripheral part forming a first valve integral with the annular support structure in a first hinge region, and ii) a central part forming a second valve integral with the first valve in a second hinge region.

Abstract: The invention relates to unsaturated dipyrromethene-boron borocarbons of formula (I) and the use thereof for fluorescence or electroluminescent analysis. The fluorescent properties are provided by the central ring of six atoms comprising the —N—B—N— sequence, R1 to R7 permitting the modification of the compound properties (fluorescence emission wavelength, quantitative fluorescent yield), at least one of the substituents S1 and S2 has a chromophore end group which permits an excitation of the molecule at wavelengths close to those of the substituent chromophore. A preferably selected from the chromophore substituents with a wavelength close to the ultraviolet which significantly increases the Stokes displacement.

Abstract: 3-hydroxyflavone derivatives are useful in the detection and the quantification of cell apoptosis. Such derivatives are also useful as fluorescent probes in studying lipid asymmetry of cell plasma membrane and in detecting apopoptic cells. The derivatives can be used to monitor the evolution of diseases involving cell apoptosis.

Abstract: The invention relates to a robotic device for the positioning and orientation of a platform that is connected thereto by means of articulated support structures forming parallel mechanical links, each in the form of a serial kinematic chain of articulations that are interconnected by support segments. The inventive device (1) is characterized in that it comprises three articulated parallel mechanical links comprising: (i) two opposing, symmetrical and co-planar support structures (4 and 5), and (ii) a third support structure (6) which is located in a plane that is perpendicular to the plane containing the support structures (4 and 5). According to the invention, the articulated links formed by the three supports structures (4, 5 and 6) enable the controlled movement of points belonging to the platform (2) on a surface corresponding to a spherical or ellipsoidal cap and, preferably, essentially to a half-sphere, thereby providing at least five degrees of freedom.

Abstract: The invention concerns a optical data memory, said memory comprising at least one layer of supporting material, said supporting material including molecules having, in a local zone, a collective state of molecules from at least one first collective state of molecules, and a second collective state of molecules. The invention is characterized in that only molecules having the first collective state of molecules in said local zone are capable of generating a second-harmonic signal when they are excited in said local zone by a reading electromagnetic radiation.

Abstract: The invention relates to compounds, to the complexes they form with a lanthanide, and to the use of the complexes for fluorescence marking or NMR imaging. The complex consists of an Ln ion and a ligand R2—C(X—R1)(R3)—NR4R5. R1 is a functional group, X is a single bond or a hydrocarbon-based chain consisting of at least one alkylene or alkenylene group optionally comprising at least one hetero atom or an arylene. R2 is an anionic group A2 or a C1-C4 alkylene or alkenylene group bearing at least one such group A2 and optionally comprising at least one hetero atom. R3 is H or a C1-C5 alkylene or alkenylene group optionally containing at least one hetero atom, and optionally bearing at least one anionic group A3. R4 is a substituent with light-absorbing properties that forms chelate rings with Ln. R5 is a substituent that forms chelate rings with Ln.

Abstract: The invention relates to a piezo-rheometric measuring cell for shear or compression measurement, essentially comprising two sample holder plates, with the sample for analysis between the same in solid, liquid or intermediate form, piezoelectric ceramic elements on the faces of the plates opposite to the faces in contact with the sample and a construction forming the housing and compressing the arrangement of plates and ceramic elements, one or more ceramics called emitter, being connected to one of the two plates or the emitter plate and subjecting the same to shear or compression vibrations by means of an excitation signal and one or more ceramics, called receiver, being connected to the other plate or receiver plate and converting the forces to which the same is subject into a measured signal.

Abstract: The use of a collection of compounds of general formula (I), wherein: n is 0 or 1; p represents an integer between 1 and 6; r represents an integer between 1 and 12; R1 and R?1 represent in particular a hydrogen atom; R2 represents an amino acid side chain or an amino acid derivative; R3 represents a group derived from a carboxylic acid, bearing a basic entity; R4 represents in particular an alkyl group containing 1 to 10 carbon atoms; and A represents a hydrogen atom, a protecting group or a tracing group, in particular a fluorophor, a coloring agent or a quencher, for determining, through binding studies, ligands of receptors whose ligand is unknown or whose ligand useful for carrying out specific affinity binding assays is unknown.

Abstract: The present invention concerns the use of a PTHrP antagonist for preparing a pharmaceutical composition for treating renal cell carcinoma (RCC) in a mammal and in particular in a human subject. Advantageously, the invention is of particular interest for inhibiting or reducing tumour growth and/or metastasis formation in kidney cancer and its metastatic developments, in particular in the lung and the liver.