Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Laurent Guillon"'
Publikováno v:
Frontiers in Physiology, Vol 15 (2024)
BackgroundAnalysis of ultrasound radio frequency (RF) signals allows for the determination of the index of reflectivity (IR), which is a new measure that is dependent on tissue properties. Previous work has shown differences in the IR of the carotid
Externí odkaz:
https://doaj.org/article/3b89b166641541edaf89fe802d369317
Autor:
Danielle Greaves, Laurent Guillon, Stephane Besnard, Nastassia Navasiolava, Philippe Arbeille
Publikováno v:
npj Microgravity, Vol 7, Iss 1, Pp 1-7 (2021)
Abstract The objectives of this study were to determine whether 4 days of dry immersion (DI) induced similar arterial aging as spaceflight and to test the impact of thigh cuffs. Eighteen subjects underwent DI; nine wore thigh cuffs. Cardiac and arter
Externí odkaz:
https://doaj.org/article/e4a2032f319f4b9b9f1d37581b3789a8
Publikováno v:
Frontiers in Physiology, Vol 13 (2022)
Recent studies have reported a significant increase in common carotid artery (CCA) intima media thickness, wall stiffness and reflectivity to ultrasound, in astronauts, after six months of spaceflight. The hypothesis was that 4 days in dry immersion
Externí odkaz:
https://doaj.org/article/51a488ca0ab34b3aad0da7097461cafa
Autor:
Laurent Guillon, Marc Kermorgant, Thomas Charvolin, Fabrice Bonneville, Marie-Pierre Bareille, Emmanuelle Cassol, Arnaud Beck, Marie Beaurain, Patrice Péran, Jean-Albert Lotterie, Anne Pavy-Le Traon, Pierre Payoux
Publikováno v:
Frontiers in Physiology, Vol 12 (2021)
Microgravity induces a cephalad fluid shift that is responsible for cephalic venous stasis that may increase intracranial pressure (ICP) in astronauts. However, the effects of microgravity on regional cerebral blood flow (rCBF) are not known. We ther
Externí odkaz:
https://doaj.org/article/24adad6fc2834dd5a32aa240b5887b7f
Publikováno v:
PLoS ONE, Vol 8, Iss 10, p e79111 (2013)
Pseudomonas aeruginosa produces the siderophore, pyoverdine (PVD), to obtain iron. Siderophore pathways involve complex mechanisms, and the machineries responsible for biosynthesis, secretion and uptake of the ferri-siderophore span both membranes of
Externí odkaz:
https://doaj.org/article/8485cfad544741a181905976240c1af7
Publikováno v:
Acta Astronautica. 201:75-82
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9820768a8a32b4b1632e77b427d427f
https://doi.org/10.1016/j.actaastro.2022.09.013
https://doi.org/10.1016/j.actaastro.2022.09.013
Publikováno v:
The Journal of the Acoustical Society of America. 151:3437-3447
This paper discusses the nature of the low-frequency seismo-acoustic waves generated by submarine earthquakes in the ocean. In a finite-depth homogeneous ocean over a semi-infinite solid crust, the derivation of the acoustic equations shows that wave
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c5ba34704cd8d7093dfabd65513dce0
https://doi.org/10.1121/10.0010529
https://doi.org/10.1121/10.0010529
Autor:
Marie-Pierre Bareille, Anne Pavy-Le Traon, Laurent Guillon, Fabrice Bonneville, Jean-Albert Lotterie, Patrice Péran, Arnaud Beck, Pierre Payoux, Marc Kermorgant, M. Beaurain, Thomas Charvolin, Emmanuelle Cassol
Purpose Neuro-ophthalmological changes defined as spaceflight-associated neuro-ocular syndrome have been reported after long duration space flights. The pathophysiology of this syndrome remains unclear, with the possible involvement of elevated intra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9dab005afebf667183af01389742d21d
https://doi.org/10.21203/rs.3.rs-211078/v1
https://doi.org/10.21203/rs.3.rs-211078/v1
Publikováno v:
Aerospace medicine and human performance. 91(9)
PURPOSE: The objective was to quantify the venous redistribution during a 4-d dry immersion (DI) and evaluate the effect of thigh cuffs.METHODS: The study included nine control (Co) and nine subjects wearing thigh cuffs during the daytime (CU). Ultra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70f6cb9e23174d632e9a49a28dd77887
https://pubmed.ncbi.nlm.nih.gov/32867899
https://pubmed.ncbi.nlm.nih.gov/32867899
Publikováno v:
Near Surface Geophysics
Near Surface Geophysics, European Association of Geoscientists and Engineers (EAGE), 2020, 18 (1), pp.39-48. ⟨10.1002/nsg.12078⟩
Near Surface Geophysics, European Association of Geoscientists and Engineers (EAGE), 2020, 18 (1), pp.39-48. ⟨10.1002/nsg.12078⟩
International audience; The image source method is a fast tool to perform sound-speed profile estimations for sediment tomography. It uses a broadband source and an array of receivers and is based on the representation of the reflected wave from sedi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9ff06614f7ab17cd10aa36cdaa2f68d
https://hal.archives-ouvertes.fr/hal-02431027
https://hal.archives-ouvertes.fr/hal-02431027