A5069140867- Carbon Nanotubes in Composites
- Graphene research and applications
- Spinal Cord Injury Research
- Advanced MRI Techniques and Applications
- Fullerene Chemistry and Applications
- Advanced NMR Techniques and Applications
- Plant Water Relations and Carbon Dynamics
- NMR spectroscopy and applications
- Advancements in Battery Materials
- Horticultural and Viticultural Research
- Neuroinflammation and Neurodegeneration Mechanisms
- Spinal Dysraphism and Malformations
- Synthesis and Properties of Aromatic Compounds
- Crystallography and Radiation Phenomena
- Mechanical and Optical Resonators
- Plant Pathogens and Fungal Diseases
- Hydrogen Storage and Materials
- Atomic and Subatomic Physics Research
- Boron and Carbon Nanomaterials Research
- Diamond and Carbon-based Materials Research
- Autopsy Techniques and Outcomes
- Leaf Properties and Growth Measurement
- Spectroscopy and Chemometric Analyses
- Characterization and Applications of Magnetic Nanoparticles
- Plant Surface Properties and Treatments
Université de Montpellier
2015-2024
Centre National de la Recherche Scientifique
2011-2024
Laboratoire Charles Coulomb
2015-2024
University of Pennsylvania
2007
Institut de Physique
2007
Spinal cord injury (SCI) induces a pronounced neuroinflammation driven by activation and proliferation of resident microglia as well infiltrating peripheral monocyte-derived macrophages. Depending on the time post-lesion, positive detrimental influences microglia/macrophages axonal regeneration had been reported after SCI, raising issue whether their modulation may represent an attractive therapeutic strategy. Colony-stimulating factor 1 (CSF1) regulates proliferation, differentiation...
No curative treatment is available for any deficits induced by spinal cord injury (SCI).Following injury, microglia undergo highly diverse activation processes, including proliferation, and play a critical role on functional recovery.In translational objective, we investigated whether transient pharmacological reduction of proliferation after beneficial recovery SCI in mice nonhuman primates.Methods: The colony stimulating factor-1 receptor (CSF1R) regulates differentiation, survival...
Abstract Quantifying healthy and degraded inner tissues in plants is of great interest agronomy, for example, to assess plant health quality monitor physiological traits or diseases. However, detecting functional in-vivo without harming the extremely challenging. New solutions are needed ligneous perennial species, which sustainability plantations crucial. To tackle this challenge, we developed a novel approach based on multimodal 3D imaging artificial intelligence-based image processing...
We present the first comparative investigation of Nuclear Magnetic Resonance (NMR) relaxivity a series nanosized cyano-bridged coordination networks stabilized in aqueous solution. These Ln(3+)/[Fe(CN)6](3-) (Ln = Gd, Tb, Y) and M(2+)/[Fe(CN)6](3-) (M Ni, Cu, Fe) nanoparticles with sizes ranging from 1.4 to 5.5 nm are by polyethylene glycols (MW 400 or 1000), glycol functionalized amine groups 1500), N-acetyl-D-glucosamine. The evaluation NMR allowed estimation Imaging (MRI) contrast...
Spinal cord injury (SCI) is a debilitating neuropathology with no effective treatment. Magnetic resonance imaging (MRI) technology the only method used to assess impact of an on structure and function human spinal cord. Moreover, in pre-clinical SCI research, MRI non-invasive great translational potential since it provides relevant longitudinal assessment anatomical structural alterations induced by injury. It recently that techniques have been effectively for follow-up rodents. However,...
We describe a novel purification process for single-wall carbon nanotube (SWNT) materials that removes non-nanotube and reduces ferromagnetic impurities to levels at which native SWNT magnetic properties predominate. Ferromagnetism is reduced from 1.04 less than 0.013 emu/g by gradient filtration. This procedure creates samples of sufficient quality spectroscopies such as nuclear resonance (NMR). The overall cleanliness purity the material confirmed through NIR absorption spectroscopy, X-ray...
One-dimensional crystals of 25% 13C-enriched C60 encapsulated inside highly magnetically purified SWNTs were investigated by following the temperature dependence 13C NMR line shapes and relaxation rates from 300 K down to 5 K. High-resolution MAS techniques reveal that 32% molecules, so-called C60α, are blocked at room 68%, labeled C60β, shown reversly undergo molecular reorientational dynamics. Contrary previous studies, spin−lattice time reveals a phase transition 100 associated with...
We present a detailed experimental and theoretical study on how structural properties of carbon nanotubes can be derived from ${}^{13}$C NMR investigations. Magic angle spinning solid state experiments have been performed single- multiwalled with diameters in the range 0.7 to 100 nm number walls 1 90. provide models diameter nanotube influence linewidth line position. Both are supported by calculations. Increasing D, smallest investigated nanotube, which our corresponds inner double-walled...
Hydrogenation of C60 molecules inside SWNT was achieved by direct reaction with hydrogen gas at elevated pressure and temperature. Evidence for the hydrogenation in peapods is provided isotopic engineering specific enrichment encapsulated species high resolution 13C 1H NMR spectroscopy observation characteristic diamagnetic paramagnetic shifts lines appearance sp3 carbon resonances. We estimate that approximately 78% SWNTs are hydrogenated to an average degree 14 atoms per molecule. As a...
Abstract. Nuclear magnetic resonance imaging (NMRI) is a powerful tool for biological investigations. Nevertheless, the resolution performance results in combination of field (B0) and antenna efficiency. This latter one compromise between size sample, location region interest homogeneity requirement. In context spinal cord on mice, ribbon solenoid coil used to enhance efficiency MRI experiment. paper details calculation local magnetization contribution induced voltage coils. The modeling...
Spinal cord injuries (SCI) are disastrous neuropathologies causing permanent disabilities. The availability of different strains mice is valuable for studying the pathophysiological mechanisms involved in SCI. However, strain differences have a profound effect on spontaneous functional recovery after CX3CR1+/eGFP and Aldh1l1-EGFP that express green fluorescent protein microglia/monocytes astrocytes, respectively, particularly useful to study glial reactivity. Whereas C57BL/6 background,...
Electronic properties of single-walled carbon nanotubes intercalated with lithium are investigated by NMR. $^{13}\mathrm{C}$ NMR experiments reveal a metallic ground state for all the following stoichiometries ${\mathrm{LiC}}_{x}$ $x=10$, 7, and 6. A continuous increase density states at Fermi level according to Li concentration is observed up $x\ensuremath{\approx}6$. From $^{7}\mathrm{Li}$ NMR, evidence inequivalent sites reported, corresponding preferential intercalation binding between C.
Abstract. Electromagnetic coils are ubiquitously used in the modern world motors, antennas, etc. In many applications (magnetic field coil calibration and nuclear magnetic resonance spectroscopy imaging) there is a strong need for homogeneous field. this paper, we propose simple modelling based on serial Fourier decomposition allowing determination of electrical conductor distribution to make homogeneous. The method valid both plane axisymmetric geometries. allows retrieval classical...
Central nervous system (CNS) injury has been observed to lead microglia activation and monocytes infiltration at the lesion site. Ex vivo diffusion magnetic resonance imaging (diffusion MRI or DWI) allows detailed examination of CNS tissues, recent advances in clearing procedures allow fluorescent-labeled cells high resolution. No study yet combined ex establish a possible link between microglia/monocytes response coefficient context spinal cord (SCI). We carried out different time-points...