Abstract: The invention relates to an electrochemical method and device for detecting and/or quantifying sulphur dioxide (S(¾) in its various uncomplexed forms (molecular and ionic) in an aqueous or hydroalcoholic liquid food product. It also relates to a method for regenerating an electrode, the active surface of which is composed of gold. The electrochemical method for detecting and/or quantifying sulphur dioxide (SO2) in its uncomplexed (free) forms in an aqueous or hydroalcoholic liquid food product of the invention comprises: a) introducing into the liquid food product a measuring electrode, the active surface of which, in contact with the liquid food product is entirely made of gold, b) measuring the variation of the current produced by the oxidisation of the free SC½, present in the food liquid, during a potential sweep by cyclic voltammetry. In particular, the invention is used for measuring free S(¾).

Abstract: The present invention relates to a novel real-time multiplexed, multi-color BRET assay and apparatus for studying protein-protein interactions and determining various biological activities in live cells, wherein said assay is capable of capturing multiple signals simultaneously from a single sample and simultaneously over one or several wells. The real-time multiplexed, multi-color BRET assay is particularly useful for drug-screening, protein interactions, change of conformation of any channel or receptor subunits within live cells in response to potential drug candidates, thereby indicating activation or inhibition of said channel or receptor.

Abstract: The present invention relates to a method of observing biological tissue, the method comprising: collecting through a first end of a bundle of optical fibers light from a surface of the tissue; observing at least one image of the tissue at a second end of the bundle, while injecting light into the second end of the bundle to illuminate the surface of the tissue.

Abstract: The present invention relates to a fluorescence correlation spectroscopy system (1) for analyzing particles in a medium (2), including a means (3) for detecting the light (7) emitted by the particles in the medium (2), said means (3) being coupled to a waveguide (4), for which purpose the end piece of the guide (4) comprises a means (4b; 5) for confining the light (7) injected into the guide (4).

Abstract: The present invention relates to a method of observing biological tissue, the method comprising: collecting through a first end of a bundle of optical fibers light from a surface of the tissue; observing at least one image of the tissue at a second end of the bundle, while injecting light into the second end of the bundle to illuminate the surface of the tissue.