French National Center for Scientific Research

www.cnrs.fr/index.php
Gif - sur - Yvette, France
SEARCH FILTERS
Time filter
Source Type

Patent
SYRAL Belgium NV and French National Center for Scientific Research | Date: 2017-04-19

The invention relates to a composition of isomers of mono-alkyl ethers of monoanhydro-hexitol having an alkyl ether radical (OR) at C-3, C-5 or C-6 of the monoanhydro-hexitol, in which the alkyl group (R) is a linear or branched, cyclic or non-cyclic hydrocarbon group comprising between 4 and 18 carbon atoms. The invention also relates to the method for producing such a composition, as well as to the use thereof as a non-ionic surfactant, an emulsifier, a lubricant, an antimicrobial agent or a dispersing agent.


Patent
French National Center for Scientific Research | Date: 2017-09-20

A terahertz optomechanical transducer for transducing an incident electromagnetic wave (3) having a terahertz frequency within a terahertz frequency band of use. The terahertz optomechanical transducer comprises an electromagnetic resonator (1) having a response bandwidth including said frequency. The electromagnetic resonator (1) comprises a first element (2) and an opposite element (4) forming with the first element a capacitive gap. The first element is mechanically configured to response to the action of an force stemming (7) from an electric field generated by interaction of said incident electromagnetic wave with electric charges present in said electromagnetic resonator. The electric field is generated between a first electric pole (6) induced in said first element (2) by first electric charges having a first electrical sign and a second electric pole (5) induced in said opposite element (4) by second electric charges having a second electrical sign opposite to the first electrical sign. The first electric charges and the second electric charges alternate between the first and the second electric poles (5, 6) in time at the terahertz frequency of the incident electromagnetic wave.


Patent
French National Center for Scientific Research | Date: 2017-09-13

The present invention relates to alpha-hydroxy-beta-triazolo-tetrazoles of formula (I): The present invention also relates to a process for manufacturing alpha-hydroxy-beta-triazolo-tetrazoles of formula (I). The present invention further relates to the use of alpha-hydroxy-beta-triazolo-tetrazoles for synthesizing new compounds, e.g. in click chemistry.


Patent
French National Center for Scientific Research | Date: 2017-09-13

The invention relates to the use of halogen derivatives of histidine of formula (I) as electrolytic salts for preparing an electrolyte composition in a photoelectrochemical cell based on the light sensitisation of photoactive molecules, and to a photoelectrochemical cell based on the light sensitisation of photoactive molecules comprising an electrolyte composition comprising at least one halogen derivative of histidine as electrolytic salt.


The invention relates to a method for preparing a colloidal solution S2 of nanoparticles of a mixed oxide of formula YxEu1-xVO4 in which x is such that 0 x (FR)Linvention se rapporte un procd de prparation dune solution collodale S2 de nanoparticules dun oxyde mixte de formule YxEu1-xVO4 dans laquelle x est tel que 0 x


Patent
Bluestar Silicones France SAS and French National Center for Scientific Research | Date: 2017-09-20

The present invention concerns a method for the hydrosilylation of an unsaturated compound comprising at least one ketone function, one aldehyde function, one alkene function and/or one alkyne function, with a compound comprising at least one hydrogen-silyl function implementing an organic catalyst of tri-coordinated germanium.


Patent
Bluestar Silicones France SAS and French National Center for Scientific Research | Date: 2017-09-13

The invention relates to a crosslinkable composition X, comprising: at least one organopolysiloxane compound A comprising, per molecule, at least two C2-C6 alkenyl radicals bonded to silicon atoms; at least one organohydrogenopolysiloxane compound B comprising, per molecule, at least two hydrogen atoms bonded to an identical or different silicon atom; at least one catalyst C which is a complex corresponding to the following formula: [Co (L1)2] in which: the symbol Co represents cobalt at degree of oxidation II; the symbols L1, which may be identical or different, represent a ligand which is a -dicarbonylato anion or the enolate anion of a -dicarbonylated compound; optionally at least one adhesion promoter D; and optionally at least one charge E. The invention also relates to the use of the previously described catalyst C as silicone composition crosslinking catalyst, to a silicone composition crosslinking method, characterized in that it consists in heating the composition X to a temperature of between 70 and 200C, and to the resulting crosslinked silicone material Y.


Patent
Seb S.A. and French National Center for Scientific Research | Date: 2017-09-20

An apparatus comprising a main reservoir (4) intended to contain water and an intermediate reservoir (7) supplied by said main reservoir (4), the intermediate reservoir (7) comprising a cathode (10) and an anode (11; 211) intended to precipitate calcium carbonate and comprising a filter (8) forming a filtering barrier dividing the volume inside the intermediate reservoir (7) between a primary chamber (71) receiving the cathode (10), supplied with the water from the main reservoir (4), and a secondary chamber (72) receiving the anode (11, 211), from which water is pumped to be used in a device (5), said anode (11; 211) comprising two longitudinal ends (11A, 11B; 211A, 211B) between which it extends longitudinally along an axis X, characterised in that the water is drawn from the secondary chamber (72) at at least one suction port (92; 92A, 92B; 292) which, in an orthogonal projection along the axis X, is located between the two ends (11A, 11B; 211A, 211B) of the anode.


The invention relates to a method for compressing data representing a digital three-dimensional object, comprising: acquiring a three-dimensional object comprising a mesh formed from a plurality of polygons (12, 14), and a texture atlas of the polygons of the mesh, and simplifying the mesh by deletion of vertices, which deletes polygons and replaces same with new polygons having a broader face; and wherein, before the deletion of the vertices, the method comprises: identifying first (12) and second (14) adjacent polygons with different textures in the mesh, then splitting the first (B) and second (C) shared vertices by creating third (B) and fourth (C) vertices.


Laflorencie N.,French National Center for Scientific Research
Physics Reports | Year: 2016

This review focuses on the field of quantum entanglement applied to condensed matter physics systems with strong correlations, a domain which has rapidly grown over the last decade. By tracing out part of the degrees of freedom of correlated quantum systems, useful and non-trivial information can be obtained through the study of the reduced density matrix, whose eigenvalue spectrum (the entanglement spectrum) and the associated Rényi entropies are now well recognized to contain key features. In particular, the celebrated area law for the entanglement entropy of ground-states will be discussed from the perspective of its subleading corrections which encode universal details of various quantum states of matter, e.g. symmetry breaking states or topological order. Going beyond entropies, the study of the low-lying part of the entanglement spectrum also allows to diagnose topological properties or give a direct access to the excitation spectrum of the edges, and may also raise significant questions about the underlying entanglement Hamiltonian. All these powerful tools can be further applied to shed some light on disordered quantum systems where impurity/disorder can conspire with quantum fluctuations to induce non-trivial effects. Disordered quantum spin systems, the Kondo effect, or the many-body localization problem, which have all been successfully (re)visited through the prism of quantum entanglement, will be discussed in detail. Finally, the issue of experimental access to entanglement measurement will be addressed, together with its most recent developments. © 2016 Elsevier B.V.

Loading French National Center for Scientific Research collaborators
Loading French National Center for Scientific Research collaborators