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28 November 2019

Cell crawling in a fluid

Cell motility, the spontaneous movement of cells from one location to another, plays a fundamental role in many biological processes, including immune responses and metastasis. Recent physics studies have gathered new evidence suggesting that mammalian cells do not only crawl on solid substrates, including complex 3-D mediums of a tissues, but can also swim in fluids.

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28 October 2019

How a molecule can change the climate

A team from the l’Institut de physique des 2 infinis de Lyon (IP2I ‒ Université Claude Bernard Lyon 1 / CNRS), in collaboration with LIPhy and laboratories Austria and Japan, has just discovered a process that was completely unknown until now: the first steps in the formation of atmospheric aerosols are promoted by the presence of pyridine. (Press release from Lyon 1 University & CNRS)

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15 October 2019

How optics can do better than electronic signal generators?

A new technique of photonic generation allows, from a continuous laser, and a low frequency electronics (10 MHz), to generate arbitrary signals with durations up to 100 ns, and bandwidths greater than 25 GHz. This technique relies on the use of a frequency shifting optical loop injected by a continuous laser.

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19 September 2019

Stimulation Emission Depleted Photoacoustic

A chromophore brought in an excited state, when it absorbs light, returns to equilibrium spontaneously by re-emitting light, photons, it is said to fluoresce. But when it is in the condensed phase, its de-excitation can also be done by generating vibrations, phonons, at the origin of a photoacoustic signal. De-excitation can also be stimulated by another light source, it is done to the detriment of the spontaneous emission by depletion of the excited state, it is the phenomenon of Stimulated Emission Depletion (STED ).

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6 September 2019

A single instrument to detect traces of multiple gases

A project using a newly patented LIPhy technology was supported by a "CNRS prematuration program" and is currently in the maturation phase with Satt Linksium.

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