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L'actualité en direct des laboratoires du CEA
Archives
BIOLOGIE STRUCTURALE | BACTÉRIES
Scientists from the IBS have characterized a potential target for new antibiotics.
CHIMIE | PHARMACOLOGIE | IMAGERIE MÉDICALE
Two teams from the Institut Frédéric-Joliot and their partners have discovered a chemical reaction that allows the binding or breaking of molecules in biological environments.
LASER
A collaboration involving Iramis has demonstrated the possibility of amplifying the generation of high-order laser harmonics by a factor greater than ten in a zinc oxide (ZnO) semiconductor crystal, by engraving a network of micro-cones on the crystal surface. The gain obtained makes it possible to lower the required infrared power by the same amount.
Le Liten a pour la première fois observé l’évolution de la composition chimique de batteries lithium-ion en fonctionnement par XPS. Avec en ligne de mire : une meilleure connaissance des mécanismes de dégradation à l’œuvre dans les accumulateurs.
ELECTRONIQUE
The reliability of integrated circuits is a key point for space applications. They are becoming increasingly complex and dense, which heightens their vulnerability to cosmic particles. To remedy this, researchers from the Inac are proposing a new integrated circuit structure, which will be more robust in a space environment.
BIOLOGIE STRUCTURALE
Researchers from the IBS are working on crystallography techniques in order to see proteins in motion.
SANTÉ ＆ SCIENCES DU VIVANT | ELECTRONIQUE
Prix Best Early Stage Innovation, décerné par la Commission européenne
VIRUS | MALADIES INFECTIEUSES
The phage is a formidable killer of bacteria. Researchers from the IBS have shown how its tail, which recognizes its target, and its capsid, which contains what it needs to destroy the bacterium, communicate.
PHYSIQUE DES PARTICULES
The LHC’s Atlas collaboration at Cern has observed a rare process: the production of Higgs bosons in association with a top quark and top antiquark pair. This work, supervised by an Irfu researcher, opens up perspectives on the study of the Higgs mechanism that gives mass to particles.
STOCKAGE DE L'ÉNERGIE
Three teams from the Inac have manufactured and characterized highly nitrogen-doped graphene nanosheets and tested them as supercapacitor electrodes. The performances obtained compare favorably with state of the art carbon electrodes. This promising technology has yet to be optimized for on-chip applications.
COGNITION | CERVEAU
Researchers from the Institut Frédéric-Joliot have shown that during the first months of life, babies orientate themselves towards faces and quickly learn to recognize them, but only using their right hemispheres.
CLIMAT | ENVIRONNEMENT | RECHERCHE FONDAMENTALE
Le réseau Icos de mesure du carbone fournit des données de haute précision au service de la recherche sur le changement climatique.
Afin d’offrir de nouveaux marchés avec un fort avantage concurrentiel, le Leti, institut de CEA Tech, a été sollicité pour développer un composant électronique réalisant une fonction retard de résolution picoseconde pour la société Greenfield Technology.
SANTÉ ＆ SCIENCES DU VIVANT | CERVEAU
Des chercheurs de Neurospin (CEA/Inserm) ont découvert comment le cerveau intègre et filtre les informations sensorielles.
EPIGÉNÉTIQUE | PHYSIOLOGIE VÉGÉTALE
Researchers from the BIG have revealed the functions of specific RNAs that intervene during protein production. These circular molecules have more than one trick in their bag.
PHOTONIQUE
Researchers from the Inac have developed new approaches to UV and infrared detection using individual gallium nitride (GaN) nanowires. In particular, they produced the first nanowire photodetector using electronic transitions within the conduction band of a semiconducting heterostructure.
To better understand the effects of therapeutic irradiation on cartilage, the structure of its main constituent, collagen, has been studied by a collaboration involving Iramis. Their analysis suggests that the stability of collagen owes nothing to its aqueous environment, but all to its remarkable triple helix structure that can exist in the absence of any solvent.
DÉCHETS RADIOACTIFS
A team from Iramis analyzed the long-term corrosion of steel in a clay environment, under conditions of geological storage for nuclear waste. They observed that an iron oxide layer of sub-micron thickness appears on the steel surface, stabilizing the kinetics of the deterioration. This result enhances the corrosion models of the CEA and the Andra!
Data collected at the LHC (Cern) were processed to provide the most accurate assessment of an asymmetry in top quark and top antiquark production. The result is that the measured value is compatible with the prediction of the standard particle model.
RECHERCHE FONDAMENTALE
A collaboration involving the Inac has revealed an astonishing transition between two phases that possess the same magnetic symmetry. This characteristic makes it impossible for the phase transition to be controlled by magnetism, which imposes the following corollary: the very nature of superconductivity has changed!
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Acteur majeur de la recherche, du développement et de l'innovation, le CEA intervient dans quatre grands domaines : énergies bas carbone, défense et sécurité, technologies pour l’information et technologies pour la santé.