A. Sentenac

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Yeast RNA polymerase B catalyzes an efficient abortive initiation on double-stranded DNA templates using the appropriate combination of primer and substrate. The specificity of initiation was investigated using a recombinant plasmid (pJD14 DNA) containing the structural gene for yeast alcohol dehydrogenase I (ADHI). The combination of the dinucleotide UpA(More)
We propose an effective-medium theory for random aggregates of small spherical particles that accounts for the finite size of the embedding volume. The technique is based on the identification of the first two orders of the Born series within a finite volume for the coherent field and the effective field. Although the convergence of the Born series requires(More)
The microscope image of a thick fluorescent sample taken at a given focal plane is plagued by out-of-focus fluorescence and diffraction limited resolution. In this work, we show that a single slice of Structured Illumination Microscopy (two or three beam SIM) data can be processed to provide an image exhibiting tight sectioning and high transverse(More)
Using a Cramer-Rao analysis, we study the theoretical performances of a time and spatially resolved fDOT imaging system for jointly estimating the position and the concentration of a point-wide fluorescent volume in a diffusive sample. We show that the fluorescence lifetime is a critical parameter for the precision of the technique. A time resolved fDOT(More)
  • Simon Labouesse, Marc Allain, Jérôme Idier, Sébastien Bourguignon, Awoke Negash, Penghuan Liu +1 other
  • 2016
—The blind structured illumination microscopy (SIM) strategy proposed in [1] is drastically revisited in this paper, unveiling the mechanism that drives the super-resolution in the method. A much improved numerical implementation is also provided for the reconstruction problem under the image positivity constraint. This algorithm rests on a new(More)
We provide a numerical study of a tomographic microscope in which the sample is deposited on a periodically nanostructured substrate and is illuminated under various incident angles. The map of permittivity of the sample is retrieved numerically from the complex data of the diffracted far-field. A single-scattering analysis shows that, with an optimized(More)
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