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Understanding the behavior of "active matter"

This study was carried out by CEA/IRAMIS in collaboration with the Research Center on Animal Cognition (Université Paul Sabatier - CNRS) in Toulouse, France.

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The turbulent birth of stars in galactic collisions

The effects of turbulence generated when two galaxies collide analyzed by astrophysicists at CEA and CNRS.

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Safety of nuclear reactors: how to model precisely the water-steam flows

Model as precisely as possible the many complex phenomena which occur when the water flows in pressurized water reactors. That is the task the experts in fluid mechanics from CEA Direction de l’Energie Nucléaire (DEN) are dedicated to...

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Another option to hexavalent chromium

A research team from Iramis has developed a new process for prepping metals for paint. This technique does not use hexavalent chromium, which is highly carcinogenic. Zoom on this strategic discovery.

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Toward a better understanding of the genes incriminated in mental retardation

Could yeast experiments help us better understand the causes of mental retardation? Surprising as it may seem, researchers at CEA-IRTSV used the yeast model to explain the molecular origin of some cortex defaults in humans. These results were published in the scientific journal Nature Genetics. Thanks to the improvements in imaging, scientists know better and better the anatomical anomalies which cause mental retardation. Cortex malformations and a malfunction of neuronal circuitry are (...)

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The first single-molecule LED

Researchers have developed the first ever single-molecule LED. It seems like they crossed the finish line in the race to miniaturize light emitting diodes (LED). A team of scientists led by the Institut de physique et de chimie des matériaux de Strasbourg (IPCMS, CNRS/Université de Strasbourg), working with UPMC and CEA, has just developed the first ever single-molecule LED. The device is composed of a single polythiophene wire placed between the tip of a scanning tunneling microscope and a (...)

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Shape transformation of vesicles

Vesicles play an important part in exchanges between cells. Some vesicles may become drugs carriers. Physicists at CEA-Iramis conducted a study on their shape transformation. How does the shape of vesicles immersed in concentrated solution change? Physicists at CEA-Iramis studied the shape of very rigid vesicles - polymersomes, after an osmotic stress. In particular conditions, they evidenced the formation of a double cell wall, inside which drugs could be encapsulated. Vesicles are (...)

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A bacterium reveals the crucible of its metallurgical activity

An international consortium led by CEA researchers in collaboration with the CNRS, has succeeded in characterizing the structure and function of a protein involved in the production of magnetite nanomagnets in magnetotactic bacteria. This protein, MamP, is crucial to the metallurgical activity of the bacterium. It is this protein that gives the magnetite its magnetic properties. This work constitutes an important advance in the understanding of these bacteria and the magnetite (...)

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ALMA “Ultrasound Scan” of the Birth of a Monster Star

Astrophysicists from the CEA, CNRS and Bordeaux 1 and Paris-Diderot Universities, working on an international cooperation project, have identified the mechanism behind the formation of a star fifty to a hundred times the mass of the Sun, located 11,000 light-years away. The observations from ALMA have allowed the researchers to fathom the molecular cloud that is giving birth to this giant star. This research was published in Astronomy & Astrophysics on July 10. Molecular clouds are (...)

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ChArMEx: Special Tracking of Atmospheric Pollution in the Mediterranean Region

From June 10 to August 10 2013, the CEA and CNRS are coordinating a major measurement campaign as part of the most comprehensive survey of atmospheric pollution in the Mediterranean region. The goal of this international project, the Chemistry-Aerosol Mediterranean Experiment (ChArMEx), an integral part of Mediterranean Integrated Studies at Regional and Local Scales (MISTRALS), an international interdisciplinary metaprogram, is to improve our understanding of interactions between (...)

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