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759 results on '"Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)"'

1. On Stability of Homogeneous Systems in Presence of Parasitic Dynamics

Author: Jesus Mendoza-Avila, Denis Efimov, Leonid Fridman, Jaime A. Moreno, Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), ITMO University [Russia], Facultad de Ingeniería, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), This work was supported in part by Homogeneity Tools for Sliding Mode Control and Estimation (HoTSMoCE) INRIA associate team program, by CONACyT (Consejo Nacional de Ciencia y Tecnologia) project 241171, 282013 and CVU 711867, by PAPIIT-UNAM (Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica) IN 115419 and IN 113617., Finite-time control and estimation for distributed systems [VALSE], and Universidad Nacional Autónoma de México = National Autonomous University of Mexico [UNAM]
Subjects: Singular Perturbations, Control and Systems Engineering, Chattering Analysis, Homogeneity, Electrical and Electronic Engineering, Interconnected Systems, Computer Science Applications, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract: International audience; Usually, singularly perturbed models are used to justify the decomposition of the interconnected systems into the Main Dynamics (MD) and the Parasitic Dynamics (PD). In this paper, the effect of a homogeneous PD on the stability of a homogeneous MD, when Homogeneity Degrees (HD) are possibly different, is studied via ISS approach in the framework of singular perturbations. Thus, the possibilities to reduce the order of the interconnected system considering only Reduced-Order Dynamics (ROD) and neglecting PD are examined. Proposed analysis discovers three kinds of stability in the behavior of such an interconnection by assuming that both, ROD and unforced PD, are Globally Asymptotically Stable (GAS). In the first case, when the HD of both systems coincide and the Singular Perturbation Parameter (SPP) is small enough, GAS of the interconnection can be concluded. In the second case, when the HD of ROD is greater, only local stability of interconnection can be ensured. Moreover, proposed approach allows to estimate the domain of attraction for the trajectories of the interconnection as a function of the SPP. In the third case, when the HD of ROD is smaller than the HD of PD, only practical stability can be concluded, and a kind of chattering phenomenon can arise when the HD of ROD is negative. Furthermore, the asymptotic bound of the system's trajectories is also estimated in terms of the SPP.
Published: 2023

2. Output global oscillatory synchronisation of heterogeneous systems

Author: Hafiz Ahmed, Leonid Fridman, Rosane Ushirobira, Denis Efimov, Yongqiang Wang, Coventry University, Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Departamento de Ingenieria de Control y Robotica, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Clemson University, This work was partially supported by Consejo Nacional de Ciencia y Tecnologia, Mexico [grant no. 282013], Government Council on Grants, Russian Federation [Grant 08-08], Ministry of Education and Science of the Russian Federation [Project 14.Z50.31.0031], Programa de Apoyo a Proyectos de Investigación e Innovación Tecnológica (UNAM), Mexico 115419, HoTSMoCE INRIA associate team program., Coventry University (UK), and Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM)
Subjects: 0209 industrial biotechnology, Van der Pol oscillator, Degree (graph theory), Computer science, Sliding mode observation, 02 engineering and technology, Topology, [SPI.AUTO]Engineering Sciences [physics]/Automatic, Computer Science Applications, Nonlinear system, 020901 industrial engineering & automation, Control and Systems Engineering, Real-time Control System, Output synchronization, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Projection (set theory), Real-time control
Abstract: International audience; The global output synchronization problem for heterogeneous nonlinear systems having relative degree 2 or higher is studied. The proposed approach consists in two steps. First, a partial projection of individual subsystems into the Brockett oscillators is performed using a sliding-mode control. Second, the network of these oscillators is synchronized using the global synchronization results of a particular second order nonlinear oscillator model from Ahmed et al. (2019). Our approach is based on output feedback and uses a higher order sliding mode observer to estimate the states and perturbations of the synchronized nonlinear systems. Along with numerical simulations, the performance of the proposed synchronization scheme is experimentally verified on a network of Van der Pol oscillators.
Published: 2019

3. A Blueprint for an Inclusive, Global Deep-Sea Ocean Decade Field Program

Author: Kerry L. Howell, Ana Hilário, A. Louise Allcock, David M. Bailey, Maria Baker, Malcolm R. Clark, Ana Colaço, Jon Copley, Erik E. Cordes, Roberto Danovaro, Awantha Dissanayake, Elva Escobar, Patricia Esquete, Austin J. Gallagher, Andrew R. Gates, Sylvie M. Gaudron, Christopher R. German, Kristina M. Gjerde, Nicholas D. Higgs, Nadine Le Bris, Lisa A. Levin, Elisabetta Manea, Craig McClain, Lenaick Menot, Nelia C. Mestre, Anna Metaxas, Rosanna J. Milligan, Agnes W. N. Muthumbi, Bhavani E. Narayanaswamy, Sofia P. Ramalho, Eva Ramirez-Llodra, Laura M. Robson, Alex D. Rogers, Javier Sellanes, Julia D. Sigwart, Kerry Sink, Paul V. R. Snelgrove, Paris V. Stefanoudis, Paulo Y. Sumida, Michelle L. Taylor, Andrew R. Thurber, Rui P. Vieira, Hiromi K. Watanabe, Lucy C. Woodall, Joana R. Xavier, Centre for Environmental and Marine Studies [Aveiro] [CESAM], National University of Ireland [Galway] [NUI Galway], National Center for Atmospheric Research [Boulder] [NCAR], Temple University [Philadelphia], Stazione Zoologica Anton Dohrn [SZN], Plymouth University, Universidad Nacional Autónoma de México = National Autonomous University of Mexico [UNAM], Universidade de Aveiro, National Oceanography Centre [Southampton] [NOC], Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG], University of California [San Diego] [UC San Diego], Centre for Environmental and Marine Studies [Aveiro] (CESAM), National University of Ireland [Galway] (NUI Galway), National Center for Atmospheric Research [Boulder] (NCAR), IPIMAR, Pennsylvania Commonwealth System of Higher Education (PCSHE), Stazione Zoologica Anton Dohrn (SZN), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), EMSO ERIC, Rome, Italy, National Oceanography Centre [Southampton] (NOC), University of Southampton, Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG), Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Nord]), Sorbonne Université (SU), Center for Marine Biodiversity and Conservation, Scripps Institution of Oceanography (SIO - UC San Diego), University of California [San Diego] (UC San Diego), University of California (UC)-University of California (UC)-University of California [San Diego] (UC San Diego), University of California (UC)-University of California (UC), and University of California (UC)
Subjects: 0106 biological sciences, lcsh:QH1-199.5, Biodivercity, 010504 meteorology & atmospheric sciences, Blue economy, Ocean health, capacity development, Knowledge sharing, Census of Marine Life, essential ocean variables, Ocean Decade, Oceanography, 01 natural sciences, SponGES, 11. Sustainability, lcsh:Science, Water Science and Technology, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Global and Planetary Change, Ecology, Deep-sea Sponge Grounds Ecosystems of the North Atlantic: an integrated approach towards their preservation and sustainable exploitation, Environmental resource management, Essential ocean variables, Hazard, Deep sea, Geography, Specimen collection, deep sea, Research program, Ocean Engineering, Context (language use), lcsh:General. Including nature conservation, geographical distribution, Aquatic Science, 12. Responsible consumption, Blueprint, 14. Life underwater, blue economy, Life Below Water, 0105 earth and related environmental sciences, Sustainable development, Horizon 2020, business.industry, 010604 marine biology & hydrobiology, Grant Agreement No 679849, 15. Life on land, Earth system science, 13. Climate action, Sustainable management, lcsh:Q, European Union (EU), [SDE.BE]Environmental Sciences/Biodiversity and Ecology, business
Abstract: The ocean plays a crucial role in the functioning of the Earth System and in the provision of vital goods and services. The United Nations (UN) declared 2021–2030 as the UN Decade of Ocean Science for Sustainable Development. The Roadmap for the Ocean Decade aims to achieve six critical societal outcomes (SOs) by 2030, through the pursuit of four objectives (Os). It specifically recognizes the scarcity of biological data for deep-sea biomes, and challenges the global scientific community to conduct research to advance understanding of deep-sea ecosystems to inform sustainable management. In this paper, we map four key scientific questions identified by the academic community to the Ocean Decade SOs: (i) What is the diversity of life in the deep ocean? (ii) How are populations and habitats connected? (iii) What is the role of living organisms in ecosystem function and service provision? and (iv) How do species, communities, and ecosystems respond to disturbance? We then consider the design of a global-scale program to address these questions by reviewing key drivers of ecological pattern and process. We recommend using the following criteria to stratify a global survey design: biogeographic region, depth, horizontal distance, substrate type, high and low climate hazard, fished/unfished, near/far from sources of pollution, licensed/protected from industry activities. We consider both spatial and temporal surveys, and emphasize new biological data collection that prioritizes southern and polar latitudes, deeper (>2000 m) depths, and midwater environments. We provide guidance on observational, experimental, and monitoring needs for different benthic and pelagic ecosystems. We then review recent efforts to standardize biological data and specimen collection and archiving, making “sampling design to knowledge application” recommendations in the context of a new global program. We also review and comment on needs, and recommend actions, to develop capacity in deep-sea research; and the role of inclusivity - from accessing indigenous and local knowledge to the sharing of technologies - as part of such a global program. We discuss the concept of a new global deep-sea biological research program‘Challenger 150,’ highlighting what it could deliver for the Ocean Decade and UN Sustainable Development Goal 14.
Published: 2020

4. Neighbour sum distinguishing edge-weightings with local constraints

Author: Antoine Dailly, Elżbieta Sidorowicz, Instituto de Matematicas (UNAM), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Optimisation Combinatoire (G-SCOP_OC), Laboratoire des sciences pour la conception, l'optimisation et la production (G-SCOP), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire d'Informatique, de Modélisation et d'Optimisation des Systèmes (LIMOS), Ecole Nationale Supérieure des Mines de St Etienne (ENSM ST-ETIENNE)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA), and University of Zielona Góra
Subjects: FOS: Computer and information sciences, Discrete Mathematics (cs.DM), Applied Mathematics, [MATH.MATH-CO]Mathematics [math]/Combinatorics [math.CO], FOS: Mathematics, Mathematics - Combinatorics, Discrete Mathematics and Combinatorics, Combinatorics (math.CO), [INFO.INFO-DM]Computer Science [cs]/Discrete Mathematics [cs.DM], Computer Science - Discrete Mathematics
Abstract: A $k$-edge-weighting of $G$ is a mapping $\omega:E(G)\longrightarrow \{1,\ldots,k\}$. The edge-weighting of $G$ naturally induces a vertex-colouring $\sigma_{\omega}:V(G)\longrightarrow \mathbb{N}$ given by$\sigma_{\omega}(v)=\sum_{u\in N_G(v)}\omega(vu)$ for every $v\in V(G)$. The edge-weighting $\omega$ is neighbour sum distinguishing if it yields a proper vertex-colouring $\sigma_{\omega}$, \emph{i.e.}, $\sigma_{\omega}(u)\neq \sigma_{\omega}(v)$ for every edge $uv$ of $G$.We investigate a neighbour sum distinguishing edge-weighting with local constraints, namely, we assume that the set of edges incident to a vertex of large degree is not monochromatic. A graph is nice if it has no components isomorphic to $K_2$. We prove that every nice graph with maximum degree at most~5 admits a neighbour sum distinguishing $(\Delta(G)+2)$-edge-weighting such that all the vertices of degree at least~2 are incident with at least two edges of different weights. Furthermore, we prove that every nice graph admits a neighbour sum distinguishing $7$-edge-weighting such that all the vertices of degree at least~6 are incident with at least two edges of different weights. Finally, we show that nice bipartite graphs admit a neighbour sum distinguishing $6$-edge-weighting such that all the vertices of degree at least~2 are incident with at least two edges of different weights.
Published: 2023

5. O-GlcNAcylation Is Involved in the Regulation of Stem Cell Markers Expression in Colon Cancer Cells

Author: Gabriela Fuentes-García, M. Cristina Castañeda-Patlán, Tony Lefebvre, Martha Robles-Flores, Anne-Sophie Vercoutter-Edouart, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Unité de Glycobiologie Structurale et Fonctionnelle UMR 8576 (UGSF), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México (UNAM), Institut National de la Recherche Agronomique (INRA)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Lille, CNRS, Universidad Nacional Autónoma de México = National Autonomous University of Mexico [UNAM], and Unité de Glycobiologie Structurale et Fonctionnelle UMR 8576 [UGSF]
Subjects: 0301 basic medicine, cancer stem cells, Colorectal cancer, Endocrinology, Diabetes and Metabolism, [SDV]Life Sciences [q-bio], 030209 endocrinology & metabolism, Nutrient sensing, Stem cell marker, lcsh:Diseases of the endocrine glands. Clinical endocrinology, 03 medical and health sciences, stemness, Endocrinology, 0302 clinical medicine, colon cancer, O-GlcNAc, OGT, OGA, Cancer stem cell, medicine, Original Research, lcsh:RC648-665, biology, CD44, Cancer, medicine.disease, Phenotype, 3. Good health, Cell biology, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, 030104 developmental biology, Cancer cell, biology.protein
Abstract: International audience; The dynamic O-linked-N-acetylglucosamine posttranslational modification of nucleocytoplasmic proteins has emerged as a key regulator of diverse cellular processes including several hallmarks of cancer. However, the role played by this modification in the establishment of CSC phenotype has been poorly studied so far and remains unclear. In this study we confirmed the previous reports showing that colon cancer cells exhibit higher O-GlcNAc basal levels than non-malignant cells, and investigated the role played by O-GlcNAcylation in the regulation of CSC phenotype. We found that the modification of O-GlcNAcylation levels by pharmacological inhibition of the O-GlcNAc-transferase enzyme that adds O-GlcNAc (OGT), but not of the enzyme that removes it (OGA), increased the expression of all stem cell markers tested in our colon malignant cell lines, and induced the appearance of a double positive (CD44+/CD133+) small stem cell-like subpopulation (which corresponded to 1–10%) that displayed very aggressive malignant phenotype such as increased clonogenicity and spheroid formation abilities in 3D culture. We reasoned that OGT inhibition would mimic in the tumor the presence of severe nutritional stress, and indeed, we demonstrated that nutritional stress reproduced in colon cancer cells the effects obtained with OGT inhibition. Thus, our data strongly suggests that stemness is regulated by HBP/O-GlcNAcylation nutrient sensing pathway, and that O-GlcNAc nutrient sensor represents an important survival mechanism in cancer cells under nutritional stressful conditions.
Published: 2019

6. SAM and the organic matter in Gale Crater, Mars - Inventory and implications

Author: Freissinet, Caroline, Glavin, Daniel P., Szopa, Cyril, Buch, Arnaud, Eigenbrode, Jennifer L., Millan, Maeva, Sutter, Brad, Teinturier, Samuel, Malespin, Charles, Guzman, Melissa, Steele, A., Navarro-Gonzalez, R., Sumner, D. Y., Mahaffy, Paul R., PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), GSFC Solar System Exploration Division, NASA Goddard Space Flight Center (GSFC), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, Jacobs Technology ESCG, Geophysical Laboratory [Carnegie Institution], Carnegie Institution for Science [Washington], Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Department of Earth and Planetary Sciences [Davis], University of California [Davis] (UC Davis), University of California-University of California, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Carnegie Institution for Science, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Department of Earth and Planetary Sciences [Univ California Davis] (EPS - UC Davis), and University of California (UC)-University of California (UC)
Subjects: [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract: International audience; The sample analysis at Mars (SAM) instrument onboard Curiosity rover is devoted to the search for organic molecules on Mars, which can provide important first clues of extinct or extant biota on the planet. We've identified molecules at various locations in Gale crater in the form of, 1) simple organic molecules released from pyrolyzed samples rich in clays and sulfates; chlorobenzene and dichloroalkanes were first identified in a mudstone, followed by the detection of at least two isomers of dichlorobenzene through a directed search. The pyrolysis of a drilled sample further down Curiosity's path led to the identification of S-bearing compounds such as thiophene and dimethylsulfide. The exact nature of the precursors and the origin of the low-temperature Cl-bearing and high temperature S-bearing molecules remain unclear. 2) More complex organic molecules with the use of derivatization. Two derivatization protocols were applied to SAM; a) an "opportunistic derivatization" that used the leak present in the system, and during which we can minimize interferences with perchlorates by removing O2/HCl before the reaction, and b) a full-cup derivatization, in which a cup containing the reagent was punctured. Both experiments led to complementary results, consistent with the presence of organic matter with a wider diversity than previously recognized. 3) High CO2 release at temperatures compatible with oxidation of organics, either from instrumental background or from the martian sample. However, the identification of any specific molecules remains difficult. Hundreds of parts per million of organics are estimated in the case that all of the CO2 comes from organic carbon decomposition. The detection of reduced organic compounds in martian near surface samples is a significant step towards understanding the presence, diversity and preservation of prebiotic or biotic molecular signatures on Mars. Lessons learned from the detection of organic molecules with SAM will feed forward to the planning of future experiments on this instrument and the next generation missions to Mars. It also enables a better understanding of the organics preservation potential of Mars samples in context, and therefore increases our ability to select future landing sites in the search for traces of life, and to wisely target samples to be returned.
Published: 2018

7. Homogeneity Based Uniform Stability Analysis for Time-Varying Systems

Author: Wilfrid Perruquetti, Leonid Fridman, Denis Efimov, Hector Rios, Jaime A. Moreno, Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Departamento de Ingenieria de Control y Robotica, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), The authors gratefully acknowledge the financial support from CONACyT (209731) - CNRS (222629) Bilateral Cooperation Project Mexico-France, and Fondo de Colaboración de Facultad de Ingeniería e Instituto de Ingeniería de la UNAM IGSBAS-122-2014. This work was also supported in part by the Government of Russian Federation (Grant 074-U01) and the Ministry of Education and Science of Russian Federation (Project 14.Z50.31.0031)., Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), and Universidad Nacional Autónoma de México (UNAM)
Subjects: 0209 industrial biotechnology, Adaptive control, 02 engineering and technology, Time-varying systems, 01 natural sciences, [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, Exponential stability, Control theory, Applied mathematics, Circle criterion, 0101 mathematics, Electrical and Electronic Engineering, Mathematics, Homogeneity (statistics), 010102 general mathematics, Linear system, 16. Peace & justice, Computer Science Applications, Nonlinear system, Control and Systems Engineering, Homogeneous, [INFO.INFO-IR]Computer Science [cs]/Information Retrieval [cs.IR], Stability of nonlinear systems, Numerical stability
Abstract: International audience; The uniform stability notion for a class of nonlinear time-varying systems is studied using the homogeneity framework. It is assumed that the system is weighted homogeneous considering the time variable as a constant parameter, then several conditions of uniform stability for such a class of systems are formulated. The results are applied to the problem of adaptive estimation for a linear system.
Published: 2016

8. Detection of Nitrites by the Sample Analysis at Mars (SAM) Instrument. Implications for the Oxidation State of the Atmosphere

Author: Navarro-González, Rafael, Coll, Patrice, Sutter, B., Stern, J., Mckay, C., Martín-Torres, F., Zorzano-Mier, M.-P., Archer, P., Buch, A., Cabane, Michel, Coscia, David, Glavin, Daniel, Franz, H., Freissinet, Caroline, McAdam, Amy, Ming, D., Raulin, François, Szopa, Cyril, Teinturier, Samuel, Mahaffy, R., Malespin, C., Vasavada, A., Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Jacobs Technology ESCG, NASA Goddard Space Flight Center (GSFC), NASA Ames Research Center (ARC), Luleå University of Technology (LUT), Instituto Andaluz de Ciencias de la Tierra (IACT), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universidad de Granada (UGR), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), NASA Johnson Space Center (JSC), NASA, Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Buch, Arnaud, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), NASA-California Institute of Technology (CALTECH), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Universidad de Granada (UGR)-Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Spain] (CSIC), and IMPEC - LATMOS
Subjects: [SDU.ASTR.IM] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology, ComputingMilieux_MISCELLANEOUS, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract: International audience
Published: 2018

9. A novel differentiator:A compromise between super twisting and linear algorithms

Author: Leonid Fridman, J-P. Barbot, Malek Ghanes, Arie Levant, Laboratoire des Sciences du Numérique de Nantes (LS2N), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire QUARTZ (QUARTZ ), Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Departamento de Ingenieria de Control y Robotica, Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), School of Mathematical Sciences [Tel Aviv], Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University [Tel Aviv]-Tel Aviv University [Tel Aviv], Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Université Paris 8 Vincennes-Saint-Denis (UP8)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), School of Mathematical Sciences [Tel Aviv] (TAU), Raymond and Beverly Sackler Faculty of Exact Sciences [Tel Aviv] (TAU), Tel Aviv University (TAU)-Tel Aviv University (TAU), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189 (CRIStAL), Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI)
Subjects: 0209 industrial biotechnology, Noise measurement, Variable exponent, Perturbation (astronomy), 010103 numerical & computational mathematics, 02 engineering and technology, 01 natural sciences, Cutoff frequency, Differentiator, [SPI]Engineering Sciences [physics], 020901 industrial engineering & automation, Control theory, 0101 mathematics, Mathematics
Abstract: International audience; Based on the frequency argument, a novel secondorder sliding mode differentiator with a variable exponent is proposed in this article. The super twisting differentiator(exponent = 0, 5) is not sensible to perturbation but its accuracy isdegraded when the signal is affected by the noise. The linearobserver (exponent= 1) has better property in the presence of noisebut is less robust to perturbations. The goal of this paper isto propose a trade-off between the exact differentiator andlinear observer. To reach this objective, the exponent parameter ismade variable. In the absence of noise exponent goes to 0; 5 andtends to 1 when the noise increases. In free-noise case andwith or without perturbation, the novel differentiator behavesas a super twisting differentiator (exact differentiation). Whenthe signal is affected by noise, only a practical stability of thedifferentiator is ensured. Finally simulation results are givento show that the novel differentiator has better performancescompared to differentiators having exponent fixed.
Published: 2017

10. Mercury isotope clocks predict coastal residency and migration timing of hammerhead sharks

Author: Lucien Besnard, Brandyn M. Lucca, Oliver N. Shipley, Gaël Le Croizier, Raúl O. Martínez‐Rincón, Jeroen E. Sonke, David Point, Felipe Galván‐Magaña, Edouard Kraffe, Sae Yun Kwon, Gauthier Schaal, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Stony Brook University [SUNY] (SBU), State University of New York (SUNY), The University of New Mexico [Albuquerque], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Centro de Investigaciones Biologicas del Noroeste [Mexico] (CONACYT-CIBNOR), Consejo Nacional de Ciencia y Tecnología [Mexico] (CONACYT), Géosciences Environnement Toulouse (GET), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Instituto Politecnico Nacional [Mexico] (IPN), Université de Brest (UBO), Pohang University of Science and Technology (POSTECH), and ANR-17-CE34-0010,MERTOX,Découvrir l'origine de la toxine methylmercure dans les écosystèmes marins(2017)
Subjects: trophic ecology, ontogeny, Ecology, dispersal timing, connectivity, fishery interaction, conservation, movement ecology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, habitat shift
Abstract: International audience; The management of migratory taxa relies on the knowledge of their movements. Among them, ontogenetic habitat shift, from nurseries to adult habitats, is a behavioural trait shared across marine taxa allowing resource partitioning between life stages and reducing predation risk. As this movement is consistent over time, characterizing its timing is critical to implement efficient management plans, notably in coastal areas to mitigate the impact of fisheries on juvenile stocks.In the Mexican Pacific, habitat use of the smooth hammerhead shark (Sphyrna zygaena) is poorly described, while the species is heavily harvested. Given the large uncertainties associated with the timing of out-migration from coastal nursery grounds to offshore waters prior to reproductive maturity, a more precise assessment of smooth hammerhead shark movements is needed.Photochemical degradation of mercury imparts mass-independent isotope fractionation (?Hg-199) which can be used to discriminate between neonate coastal shallow habitats and the offshore deep foraging patterns of late juveniles. Here, we present the application of muscle ?Hg-199 as molecular clocks to predict the timing of ontogenetic habitat shifts by smooth hammerhead sharks, based on their isotopic compositions at the initial and arrival habitats and on muscle isotopic turnover rate.We observed decreases in ?Hg-199 values with shark body length, reflecting increasing reliance on offshore mesopelagic prey with age. Coastal residency estimates indicated that smooth hammerhead sharks utilize coastal resources for 2 years prior to offshore migration, suggesting a prolonged residency in these ecosystems.Policy implications. This study demonstrates how mercury stable isotopes and isotopic clocks can be implemented as a complementary tool for stock management by predicting the timing of animal migration-a key aspect in the conservation of marine taxa. In the Mexican Pacific, fishing pressure on shark species occurs in coastal habitats depleting juvenile stocks. Consequently, management decision support tools are imperative for effectively maintaining early life stage population levels over time. The finding that smooth hammerhead sharks extensively rely on highly fished habitats for 2 years after parturition supports the relevance of establishing a size limit in coastal fisheries and demonstrates how the current temporal shark fishing closure could lack efficiency for the species.
Published: 2023

11. Oscillatory Global Output Synchronization of Nonidentical Nonlinear Systems

Author: Ahmed, Hafiz, Ushirobira, Rosane, Efimov, Denis, Fridman, Leonid, Wang, Yongqiang, Clemson University, Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Departamento de Ingenieria de Control y Robotica, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Los Alamos National Laboratory (LANL), Universidad Nacional Autónoma de México (UNAM), Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, and Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)
Subjects: Global synchronization, Brockett oscillator, nonlinear systems, nonidentical nodes, higher order sliding modes, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract: International audience; In this work, we study a global output synchronization problem for nonidentical nonlinear systems having relative degree 2 or higher. The synchronization uses a partial projection of individual subsystems into the Brockett oscillators. Our approach is based on output feedback and uses a higher order sliding mode observer to estimate the states and perturbations of the synchronized nonlinear systems. Simulation results are provided to illustrate the performance of the proposed synchronization scheme.
Published: 2017

12. A second order sliding mode differentiator with a variable exponent

Author: J-P. Barbot, Malek Ghanes, Arie Levant, Leonid Fridman, Laboratoire des Sciences du Numérique de Nantes (LS2N), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire QUARTZ (QUARTZ ), Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Departamento de Ingenieria de Control y Robotica, Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), School of Mathematical Sciences [Tel Aviv], Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University [Tel Aviv]-Tel Aviv University [Tel Aviv], IEEEE, Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Université Paris 8 Vincennes-Saint-Denis (UP8)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), School of Mathematical Sciences [Tel Aviv] (TAU), Raymond and Beverly Sackler Faculty of Exact Sciences [Tel Aviv] (TAU), Tel Aviv University (TAU)-Tel Aviv University (TAU), Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189 (CRIStAL), Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI)
Subjects: 0209 industrial biotechnology, Eigenvalues and eigenfunctions, Noise measurement, Measurement uncertainty, Mode (statistics), Stability analysis, 02 engineering and technology, Stability (probability), [SPI.AUTO]Engineering Sciences [physics]/Automatic, Differentiator, Noise, 020901 industrial engineering & automation, Control theory, Convergence (routing), 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Convergence, Observers, Pollution measurement, Variable (mathematics), Mathematics
Abstract: International audience; In this article, a new second order sliding mode differentiator with a variable exponent is proposed. Inspired by the classical super twisting differentiator, the dedicated differentiator allows to give a solution for reducing the effect of variable noise of sensor output measurement. To achieve this objective, the parameter α that is fixed in a super twisting differentiator is made variable in the proposed differentiator. First of all, the proposed differentiator is presented in free noise case, after that the extension to the case with output noise is given in details. In both cases the practical convergences of the observation error are guaranteed. In the first the radius of the practical stability is depending on the considered unknown input while in the second case this radius depends also on the noise. Finally some simulation results are given in order to show the performances and the effectiveness of the proposed differentiator compared to existing one.
Published: 2017

13. Influence of Oxychlorine Phases During the Pyrolysis of Organic Molecules: Implications for the Quest of Organics on Mars with the SAM Experiment Onboard the Curiosity Rover

Author: Millan, Maeva, Szopa, Cyril, Buch, A., Belmahdi, Imène, Glavin, Daniel, Freissinet, Caroline, Eigenbrode, Jennifer, Archer, P., Sutter, B., Summons, Roger, Navarro-González, Rafael, Coll, Patrice, Cabane, Michel, Mahaffy, Paul, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, NASA Goddard Space Flight Center (GSFC), NASA Johnson Space Center (JSC), NASA, Jacobs Technology ESCG, Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge] (EAPS), Massachusetts Institute of Technology (MIT), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Buch, Arnaud, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), IMPEC - LATMOS, and Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDU.ASTR.IM] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], [SDU.STU.PG] Sciences of the Universe [physics]/Earth Sciences/Paleontology, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract: International audience; This work facilitates the interpretation of the SAM detections, especially regarding the chlo- rinated compounds found on Mars. The reaction prod- ucts obtained after the pyrolysis of the organics mixed with the perchlorates and/or chlorates improved the understanding of the behavior of organic matter during SAM pyrolysis experiments on Mars where chlorina- tion, oxidation or oxychlorination are taking place. These experiments are also helpful to prepare future analyses and the best pyrolysis procedures to be done with the MOMA GC-MS experiment that will be onboard the Exomars 2020 mission.
Published: 2017

14. Identification of O-GlcNAcylated proteins in Plasmodium falciparum

Author: Mattis, Kupferschmid, Moyira Osny, Aquino-Gil, Hosam, Shams-Eldin, Jörg, Schmidt, Nao, Yamakawa, Frédéric, Krzewinski, Ralph T, Schwarz, Tony, Lefebvre, Philipps Universität Marburg, Institut für Virologie, Philipps University, Universidad Nacional Autónoma de México (UNAM), Unité de Glycobiologie Structurale et Fonctionnelle UMR 8576 (UGSF), Institut National de la Recherche Agronomique (INRA)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), CNRS, Université de Lille, Philipps Universität Marburg = Philipps University of Marburg, Universidad Nacional Autónoma de México = National Autonomous University of Mexico [UNAM], Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 [UGSF], Unité de Glycobiologie Structurale et Fonctionnelle UMR 8576 [UGSF], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), and Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: Proteomics, Glycosylation, lcsh:Arctic medicine. Tropical medicine, Proteome, lcsh:RC955-962, Research, Plasmodium falciparum, O‑GlcNAcylation, α‑Tubulin, Hsp70, Glycolysis, Protozoan Proteins, α-Tubulin, Acetylglucosamine, lcsh:Infectious and parasitic diseases, O-GlcNAcylation, [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN], parasitic diseases, lcsh:RC109-216, [SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology, Protein Processing, Post-Translational
Abstract: Background: Post‑translational modifications (PTMs) constitute a huge group of chemical modifications increasing the complexity of the proteomes of living beings. PTMs have been discussed as potential anti‑malarial drug targets due to their involvement in many cell processes. O‑GlcNAcylation is a widespread PTM found in different organisms including Plasmodium falciparum. The aim of this study was to identify O‑GlcNAcylated proteins of P. falciparum, to learn more about the modification process and to understand its eventual functions in the Apicomplexans. Methods: The P. falciparum strain 3D7 was amplified in erythrocytes and purified. The proteome was checked for O‑GlcNAcylation using different methods. The level of UDP‑GlcNAc, the donor of the sugar moiety for O‑GlcNAcyla‑tion processes, was measured using high‑pH anion exchange chromatography. O‑GlcNAcylated proteins were enriched and purified utilizing either click chemistry labelling or adsorption on succinyl‑wheat germ agglutinin beads. Proteins were then identified by mass‑spectrometry (nano‑LC MS/MS). Results: While low when compared to MRC5 control cells, P. falciparum disposes of its own pool of UDP‑GlcNAc. By using proteomics methods, 13 O‑GlcNAcylated proteins were unambiguously identified (11 by click‑chemistry and 6 by sWGA‑beads enrichment; 4 being identified by the 2 approaches) in late trophozoites. These proteins are all part of pathways, functions and structures important for the parasite survival. By probing clicked‑proteins with specific antibodies, Hsp70 and α‑tubulin were identified as P. falciparum O‑GlcNAc‑bearing proteins. Conclusions: This study is the first report on the identity of P. falciparum O‑GlcNAcylated proteins. While the parasite O‑GlcNAcome seems close to those of other species, the structural differences exhibited by the proteomes provides a glimpse of innovative therapeutic paths to fight malaria. Blocking biosynthesis of UDP‑GlcNAc in the parasites is another promising option to reduce Plasmodium life cycle. 16;1
Published: 2017

15. The programme on ecosystem change and society (PECS) – a decade of deepening social-ecological research through a place-based focus

Author: Albert V. Norström, Bina Agarwal, Patricia Balvanera, Brigitte Baptiste, Elena M. Bennett, Eduardo Brondízio, Reinette Biggs, Bruce Campbell, Stephen R. Carpenter, Juan Carlos Castilla, Antonio J. Castro, Wolfgang Cramer, Graeme S. Cumming, María Felipe-Lucia, Joern Fischer, Carl Folke, Ruth DeFries, Stefan Gelcich, Juliane Groth, Chinwe Ifejika Speranza, Sander Jacobs, Johanna Hofmann, Terry P Hughes, David P.M. Lam, Jacqueline Loos, Amanda Manyani, Berta Martín-López, Megan Meacham, Hannah Moersberger, Harini Nagendra, Laura Pereira, Stephen Polasky, Michael Schoon, Lisen Schultz, Odirilwe Selomane, Marja Spierenburg, Institute of Economic Growth (IEG), Delhi University, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Indiana University [Bloomington], Indiana University System, Smithsonian Institution, Pontificia Universidad Católica de Chile (UC), Centro Federal de Educação Tecnológica Celso Suckow da Fonseca (Rio de Janeiro) ( CEFET/RJ), Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), James Cook University (JCU), Faculty of Sustainability, Leuphana University of Lüneburg, Columbia University [New York], Center of applied ecology & sustainability (CAPES), Facultad de ciencias biologicas [Santiago], Pontificia Universidad Católica de Chile (UC)-Pontificia Universidad Católica de Chile (UC), and University of Bern
Subjects: Ecology, Ecosystem social-ecological systems, PATHWAYS, GOVERNANCE, SERVICES, Management, Monitoring, Policy and Law, sustainability science, transformations, KNOWLEDGE SYSTEMS, co-production, LESSONS, reflexive, CITIZEN SCIENCE, Ecosystems Research, NATURES CONTRIBUTIONS, [SDE]Environmental Sciences, Automotive Engineering, Christian Albert, BIODIVERSITY, valuation, ADVANCING SUSTAINABILITY, Ecology, Evolution, Behavior and Systematics, LEVERAGE POINTS, Nature and Landscape Conservation
Abstract: The Programme on Ecosystem Change and Society (PECS) was established in 2011, and is now one of the major international social-ecological systems (SES) research networks. During this time, SES research has undergone a phase of rapid growth and has grown into an influential branch of sustainability science. In this Perspective, we argue that SES research has also deepened over the past decade, and helped to shed light on key dimensions of SES dynamics (e.g. system feedbacks, aspects of system design, goals and paradigms) that can lead to tangible action for solving the major sustainability challenges of our time. We suggest four ways in which the growth of place-based SES research, fostered by networks such as PECS, has contributed to these developments, namely by: 1) shedding light on transformational change, 2) revealing the social dynamics shaping SES, 3) bringing together diverse types of knowledge, and 4) encouraging reflexive researchers. The Programme on Ecosystem Change and Society (PECS) was established in 2011, and is now one of the major international social-ecological systems (SES) research networks. During this time, SES research has undergone a phase of rapid growth and has grown into an influential branch of sustainability science. In this Perspective, we argue that SES research has also deepened over thepast decade, and helped to shed light on key dimensions of SES dynamics (e.g. system feedbacks, aspects of system design, goals and paradigms) that can lead to tangible action for solving the major sustainability challenges of our time. We suggest four ways in which the growth of place-based SES research, fostered by networks such as PECS, has contributed to these developments, namely by: 1)shedding light on transformational change, 2) revealing the social dynamics shaping SES, 3) bringing together diverse types of knowledge, and 4) encouraging reflexive researchers
Published: 2022

16. Planktonic microbial communities from microbialite‐bearing lakes sampled along a salinity‐alkalinity gradient

Author: Miguel Iniesto, David Moreira, Karim Benzerara, Guillaume Reboul, Paola Bertolino, Rosaluz Tavera, Purificación López‐García, Ecologie Systématique et Evolution (ESE), AgroParisTech-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), FP7 Ideas: European Research Council. Grant Number: 322669H2020 European Research Council. Grant Number: 787904, and ANR-18-CE02-0013,Microbialites,Déterminants biogéochimiques de la formation des microbialites(2018)
Subjects: [SDV]Life Sciences [q-bio], Aquatic Science, Oceanography
Abstract: International audience; Continental freshwater systems are particularly vulnerable to environmental variation. Climate changeinduced desertification and the anthropogenic exploitation of hydric resources result in the progressive evaporation and salinization of inland water bodies in many areas of the globe. However, how this process impacts microbial communities and their activities in biogeochemical cycles is poorly known. Here, we take a space-fortime substitution approach and characterize the prokaryotic and eukaryotic microbial communities of two planktonic cell-size fractions (0.2-5 μm and 5-30 μm) from lakes of diverse trophic levels sampled along a salinity-alkalinity gradient located in the Trans-Mexican Volcanic Belt (TMVB). We applied a 16S/18S rRNA gene metabarcoding strategy to determine the microbial community composition of 54 samples from 12 different lakes, from the low-salinity lake Zirahuén to the hypersaline residual ponds of Rinc on de Parangueo. Except for systems at both extremes of the salinity gradient, most lakes along the evaporation trend bear actively forming microbialites, which harbor microbial communities clearly distinct from those of plankton. Several lakes were sampled in winter and late spring and the crater lakes Alchichica and Atexcac were sampled across the water column. Physicochemical parameters related to salinity-alkalinity were the most influential drivers of microbial community structure whereas trophic status, depth, or season were less important. Our results suggest that climate change and anthropogenic-induced hydric deficit could significantly affect microbial communities, potentially altering ecosystem functioning.
Published: 2022

17. Clinical validity assessment of genes frequently tested on intellectual disability/autism sequencing panels

Author: Erin Rooney Riggs, Taylor I. Bingaman, Carrie-Ann Barry, Andrea Behlmann, Krista Bluske, Bret Bostwick, Alison Bright, Chun-An Chen, Amanda R. Clause, Avinash V. Dharmadhikari, Mythily Ganapathi, Claudia Gonzaga-Jauregui, Andrew R. Grant, Madeline Y. Hughes, Se Rin Kim, Amanda Krause, Jun Liao, Aimé Lumaka, Michelle Mah, Caitlin M. Maloney, Shruthi Mohan, Ikeoluwa A. Osei-Owusu, Emma Reble, Olivia Rennie, Juliann M. Savatt, Hermela Shimelis, Rebecca K. Siegert, Tam P. Sneddon, Courtney Thaxton, Kelly A. Toner, Kien Trung Tran, Ryan Webb, Emma H. Wilcox, Jiani Yin, Xinming Zhuo, Masa Znidarsic, Christa Lese Martin, Catalina Betancur, Jacob A.S. Vorstman, David T. Miller, Christian P. Schaaf, Geisinger Autism & Developmental Medicine Institute [Danville, PA, USA] (ADMI), Drexel University, Invitae Corporation, Illumina, Baylor College of Medicine (BCM), Baylor University, Natera [San Carlos, CA, USA], Children’s Hospital Los Angeles [Los Angeles], Keck School of Medicine [Los Angeles], University of Southern California (USC), Columbia University Irving Medical Center (CUIMC), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Broad Institute of MIT and Harvard (BROAD INSTITUTE), Harvard Medical School [Boston] (HMS)-Massachusetts Institute of Technology (MIT)-Massachusetts General Hospital [Boston], New York Medical College (NYMC), University of Illinois [Chicago] (UIC), University of Illinois System, National Human Genome Research Institute (NHGRI), University of the Witwatersrand [Johannesburg] (WITS), Université de Liège, Trillium Health Partners - Mississauga Hospital [Mississauga, ON, Canada] (THP-MH), University of Washington [Seattle], University of North Carolina [Chapel Hill] (UNC), University of North Carolina System (UNC), St. Michael's Hospital, The Hospital for sick children [Toronto] (SickKids), Garvan Institute of medical research, Warren Alpert Medical School of Brown University, University of California [Los Angeles] (UCLA), University of California (UC), The Jackson Laboratory [Bar Harbor] (JAX), University Medical Centre Ljubljana [Ljubljana, Slovenia] (UMCL), Neuroscience Paris Seine (NPS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Biologie Paris Seine (IBPS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Boston Children's Hospital, Harvard Medical School [Boston] (HMS), Heidelberg University Hospital [Heidelberg], This work was supported by the National Human Genome Research Institute of the National Institutes of Health under award number U24HG006834., and Betancur, Catalina
Subjects: ClinGen, MESH: Humans, Autism Spectrum Disorder, Autism, MESH: Autism Spectrum Disorder* / genetics, [SDV.GEN.GH] Life Sciences [q-bio]/Genetics/Human genetics, MESH: Autism Spectrum Disorder* / diagnosis, MESH: Intellectual Disability* / diagnosis, MESH: Intellectual Disability* / genetics, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, Neurodevelopmental Disorders, Intellectual Disability, MESH: Autistic Disorder* / genetics, MESH: Autistic Disorder* / diagnosis, Humans, Autistic Disorder, MESH: Neurodevelopmental Disorders* / genetics, Genetics (clinical), Gene–disease validity
Abstract: International audience; Purpose: Neurodevelopmental disorders (NDDs), such as intellectual disability (ID) and autism spectrum disorder (ASD), exhibit genetic and phenotypic heterogeneity, making them difficult to differentiate without a molecular diagnosis. The Clinical Genome Resource Intellectual Disability/Autism Gene Curation Expert Panel (GCEP) uses systematic curation to distinguish ID/ASD genes that are appropriate for clinical testing (ie, with substantial evidence supporting their relationship to disease) from those that are not.Methods: Using the Clinical Genome Resource gene-disease validity curation framework, the ID/Autism GCEP classified genes frequently included on clinical ID/ASD testing panels as Definitive, Strong, Moderate, Limited, Disputed, Refuted, or No Known Disease Relationship.Results: As of September 2021, 156 gene-disease pairs have been evaluated. Although most (75%) were determined to have definitive roles in NDDs, 22 (14%) genes evaluated had either Limited or Disputed evidence. Such genes are currently not recommended for use in clinical testing owing to the limited ability to assess the effect of identified variants.Conclusion: Our understanding of gene-disease relationships evolves over time; new relationships are discovered and previously-held conclusions may be questioned. Without periodic re-examination, inaccurate gene-disease claims may be perpetuated. The ID/Autism GCEP will continue to evaluate these claims to improve diagnosis and clinical care for NDDs.
Published: 2022

18. Hydroclimate reconstruction during the last 1000 years inferred from the mineralogical and geochemical composition of a sediment core from Lake-Azuei (Haiti)

Author: David Noncent, Abdelfettah Sifeddine, Evens Emmanuel, Marie-Helene Cormier, Francisco J Briceño-Zuluaga, Mercedes Mendez-Millan, Bruno Turcq, Sandrine Caquineau, Jorge Valdés, Juan Pablo Bernal, John W King, Irina Djouraev, Fethiye Cetin, Heather Sloan, Université Quisqueya, Faculté des Sciences, de Génie et d'Architecture (FSGA), LMI CARIBACT, URGéo, Université d’Etat d’Haïti, Faculté des Sciences (UEH, FDS), Variabilité à long terme du climat de l'océan (VALCO), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), University of Rhode Island (URI), New Granada Military University (UMNG), Laboratorio de Sedimentologıa y Paleoambientes (LASPAL), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Lehman College [CUNY], and City University of New York [New York] (CUNY)
Subjects: Archeology, Global and Planetary Change, Ecology, [SDU]Sciences of the Universe [physics], Paleontology, Earth-Surface Processes
Abstract: International audience; This study aims to reconstruct the hydro-climatic variations over the last 1000 years in Haiti using mineralogical and geochemical composition of well dated lacustrine sediment core retrieved from Lake Azuei. The results show changes in sedimentological processes linked to environmental and climatic variations. The general pattern suggests a wetter Medieval Climate Anomaly (MCA), drier Little Ice Age (LIA), high climate variability during the MCA-LIA transition and more anthropogenic impacts that dominate natural climate during the Current Warm Period (CWP). The MCA period (~1000–1100 CE) thus appears marked by increase sedimentation rate supported by higher terrigenous input linked to erosive events particularly increases in precipitation. During the LIA, particularly from ~1450 to 1600 CE, there is a great variation toward a decrease of terrigenous input, which is related to a decrease on sedimentation rate and increase Mg-calcite precipitation, suggesting less precipitation and high evaporation respectively during dry climate conditions. The MCA-LIA transition (~1200–1400 CE) is characterized by variations between terrigenous input, Mg-calcite formation and organic matter deposition, which indicate succession of dry and humid conditions. The CWP (1800–2000 CE) shows a progressive increase on sedimentation rate and decrease of gray level, which indicate more organic matter sedimentation as consequence of anthropogenic activities in the surrounding basin of the lake. High-resolution gray level analysis, which reflects principally variations in terrigenous input, carbonate mineral formation and organic matter deposition, shows that the AMO, NAO, PDO and ENSO are the principal modes affecting the hydro-climatic changes in Haiti during the last millennium. In addition, temporal correlation of other Caribbean paleoclimate records with our geochemical and mineralogical data, suggests that trends observed in Lake Azuei were controlled by regional climate, likely associated with shifts in the position of the ITCZ.
Published: 2023

19. Genetic identification and reiterated captures suggests that the Astyanax mexicanus El Pachón cavefish population is closed and declining

Author: Laurent Legendre, Julie Rode, Isabelle Germon, Marie Pavie, Carla Quiviger, Maxime Policarpo, Julien Leclercq, Stéphane Père, Julien Fumey, Carole Hyacinthe, Patricia Ornelas-García, Luis Espinasa, Sylvie Rétaux, Didier Casane, Evolution, génomes, comportement et écologie (EGCE), Institut de Recherche pour le Développement (IRD)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Objectif Sciences International NGO (OSI-NGO), Institut des Neurosciences Paris-Saclay (NeuroPSI), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Paléogénomique microbienne - Microbial paleogenomics, Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Hub Bioinformatique et Biostatistique - Bioinformatics and Biostatistics HUB, Institut Pasteur [Paris] (IP)-Université Paris Cité (UPCité), Harvard Medical School [Boston] (HMS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Marist College, UFR Sciences du Vivant [Sciences] - Université Paris Cité (UFR SDV UPCité), Université Paris Cité (UPCité), This work was supported by a CNRS MITI (Mission pour les Initiatives Transverses et Interdisciplinaires) grant 'Expérimentation en Milieux Extrêmes » to SR and collaborative grants from Agence Nationale de la Recherche (BLINDTEST) and Institut Diversité Ecologie et Evolution du Vivant to S.R. and D.C., and ANR-12-BSV7-0010,BLINDTEST,Adaptation à l'obscurité et aux ressources alimentaires réduites de populations indépendantes de poissons cavernicoles aveugles de l'espèce Astyanax mexicanus : une approche par transcriptomique comparative des mécanismes moléculaires sous-jacents.(2012)
Subjects: population size, [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], cavefish, conservation, genetic identification, swabbing
Abstract: The size ofAstyanax mexicanusblind cavefish populations of North-East Mexico is a demographic parameter of great importance for investigating a variety of ecological, evolutionary and conservation issues. However, very few estimates have been obtained. For these mobile animals living in an environment difficult to explore as a whole, methods based on capture-mark-recapture are appropriate, but the feasibility of such approach and the interpretation of the results depend on several assumptions that must be carefully examined. Here, we provide evidence that minimally invasive genetic identification from captures at different time intervals can give insights on cavefish population size dynamics as well as other important demographic parameters of interest. We also provide tools to calibrate sampling and genotyping efforts necessary to reach a given level of precision. Our results suggest that the El Pachón cave population is currently very small, of an order of magnitude of a few hundreds of individuals, and is distributed in a relatively isolated area. The probable decline in population size in the El Pachón cave since the last census in 1971 raises serious conservation issues.
Published: 2023

20. Automatic landmarking identifies new loci associated with face morphology and implicates Neanderthal introgression in human nasal shape

Author: Qing Li, Jieyi Chen, Pierre Faux, Miguel Eduardo Delgado, Betty Bonfante, Macarena Fuentes-Guajardo, Javier Mendoza-Revilla, J. Camilo Chacón-Duque, Malena Hurtado, Valeria Villegas, Vanessa Granja, Claudia Jaramillo, William Arias, Rodrigo Barquera, Paola Everardo-Martínez, Mirsha Sánchez-Quinto, Jorge Gómez-Valdés, Hugo Villamil-Ramírez, Caio C. Silva de Cerqueira, Tábita Hünemeier, Virginia Ramallo, Sijie Wu, Siyuan Du, Andrea Giardina, Soumya Subhra Paria, Mahfuzur Rahman Khokan, Rolando Gonzalez-José, Lavinia Schüler-Faccini, Maria-Cátira Bortolini, Victor Acuña-Alonzo, Samuel Canizales-Quinteros, Carla Gallo, Giovanni Poletti, Winston Rojas, Francisco Rothhammer, Nicolas Navarro, Sijia Wang, Kaustubh Adhikari, Andrés Ruiz-Linares, Ministry of Education Key Laboratory of Contemporary Anthropology, Fudan University [Shanghai]-Collaborative Innovation Center for Genetics and Development, CAS Key Laboratory of Computational Biology, Chinese Academy of Sciences [Beijing] (CAS)-University of Chinese Academy of Sciences [Beijing] (UCAS)-Shanghai Institute of Nutrition and Health, Anthropologie bio-culturelle, Droit, Ethique et Santé (ADES), Aix Marseille Université (AMU)-EFS ALPES MEDITERRANEE-Centre National de la Recherche Scientifique (CNRS), División Antropología [La Plata] (DA), Facultad de Ciencias Naturales y Museo [La Plata] (FCNyM), Universidad Nacional de la Plata [Argentine] (UNLP)-Universidad Nacional de la Plata [Argentine] (UNLP), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Departamento de Tecnología Médica, Universidad de Tarapaca, Laboratorios de Investigación y Desarrollo (LID), Universidad Peruana Cayetano Heredia (UPCH), Génétique Evolutive Humaine - Human Evolutionary Genetics, Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Division of Vertebrates and Anthropology, The Natural History Museum [London] (NHM), Laboratorio de Genética Molecular, Universidad de Antioquia = University of Antioquia [Medellín, Colombia], Molecular Genetics Laboratory, National School of Anthropology and History [Mexico City, Mexico] (NSAH), Department of Archaeogenetics [Jena] (DAG), Max Planck Institute for the Science of Human History (MPI-SHH), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Forensic Science, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Unidad de Genomica de Poblaciones Aplicada a la Salud, Scientific Police of São Paulo State [Ourinhos, Brazil], Departamento de Genética e Biologia Evolutiva, Universidade de São Paulo = University of São Paulo (USP), Departamento de Genética, Universidade Federal do Rio Grande do Sul [Porto Alegre] (UFRGS), Instituto Patagónico de Ciencias Sociales y Humanas, School of Mathematics and Statistics [Milton Keynes], Faculty of Science, Technology, Engineering and Mathematics [Milton Keynes], The Open University [Milton Keynes] (OU)-The Open University [Milton Keynes] (OU), Facultad de Medicina & Instituto de Alta Investigacion, Universidad de Tarapaca-Universidade de Chile, Biogéosciences [UMR 6282] (BGS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL), Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College of London [London] (UCL), the National Natural Science Foundation of China (#31771393), the Scientific and Technology Committee of Shanghai Municipality (18490750300), Ministry of Science and Technology of China (2020YFE0201600), Shanghai Municipal Science and Technology Major Project (2017SHZDZX01) and the 111 Project (B13016), the Leverhulme Trust (F/07 134/DF), BBSRC (BB/I021213/1), Universidad de Antioquia (CODI sostenibilidad de grupos 2013- 2014 and MASO 2013-2014), Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (Apoio a Núcleos de Excelência Program), Fundação de Aperfeiçoamento de Pessoal de Nível Superior and the National Institute of Dental and Craniofacial Research (R01-DE027023, U01-DE020078, R01-DE016148, X01-HG007821), Santander Research & Scholarship Award. B.B. is supported by a doctoral scholarship from Ecole Doctorale 251 Aix-Marseille Université., and ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011)
Subjects: MESH: Neanderthals, MESH: Cell Differentiation, MESH: Humans, [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], [SHS.ANTHRO-BIO]Humanities and Social Sciences/Biological anthropology, MESH: Nose, Medicine (miscellaneous), Sitios de Carácter Cuantitativo, Quantitative trait, Genome-wide association studies, General Biochemistry, Genetics and Molecular Biology, Estudio de Asociación del Genoma Completo, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, MESH: Genome-Wide Association Study, MESH: Animals, General Agricultural and Biological Sciences, MESH: Mice
Abstract: e report a genome-wide association study of facial features in >6000 Latin Americans based on automatic landmarking of 2D portraits and testing for association with inter-landmark distances. We detected significant associations (P-value
Published: 2023

21. Effect of the presence of chlorates and perchlorates on the pyrolysis of organic compounds: implications for measurements done with the SAM experiment onboard the Curiosity rover

Author: Millan, Maeva, Szopa, Cyril, Buch, Arnaud, Belmahdi, Imène, Coll, Patrice, Glavin, Daniel P., Freissinet, Caroline, Douglas Archer, P., Sutter, Brad, Summons, Roger E., Navarro-Gonzalez, Rafael, Cabane, Michel, Mahaffy, Paul R., PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), NASA Goddard Space Flight Center (GSFC), NASA Johnson Space Center (JSC), NASA, Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge] (EAPS), Massachusetts Institute of Technology (MIT), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Jacobs Technology ESCG, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), IMPEC - LATMOS, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México (UNAM), Buch, Arnaud, Cardon, Catherine, and Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)
Subjects: [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SDU.ASTR.IM] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], [SDU.STU.PG] Sciences of the Universe [physics]/Earth Sciences/Paleontology, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology, [PHYS.PHYS.PHYS-AO-PH] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract: International audience; The Sample Analysis at Mars (SAM) experiment onboard the Curiosity rover of the Mars Science Laboratory mission is partly devoted to the in situ molecular analysis of gases evolving from solid samples collected on Mars surface/sub-surface. SAM has a gas-chromatograph coupled to a quadrupole mass spectrometer (GC-QMS) devoted to the separation and identification of organic and inorganic material [1]. Before proceeding to the GC-QMS analysis, the solid sample collected by Curiosity is subjected to a thermal treatment thanks to the pyrolysis oven to release the volatiles into the gas processing system.As the Viking landers in 1976 [2], SAM detected chlorohydrocarbons with the pyrolysis GC-QMS experiment [3,4]. The detection of perchlorates salts in soil at the Phoenix Landing site [6] suggests that these chloro- hydrocarbons could come from the reaction of organics with oxychlorines. Oxychlorines indeed decomposed into molecular oxygen and volatile chlorine when heated and react with the organic matter in the samples by oxidation and/or chlorination processes. [3,5,7,8]. During SAM pyrolysis, samples are heated to 850◦C. SAM detected C1 to C3 chloroalkanes, entirely attributed to reaction products occurring during the pyrolysis experiment between oxychlorines and organic carbon from instrument background [3] and chlorobenzene and C2 to C4 dichloroalkanes produced by reaction between Mars endogenous organics with oxychlorines [4]. To help understanding the influence of perchlorate and chlorate salts on organic matter during SAM pyrolysis, we systemically study the reaction products formed during pyrolysis of various organic compounds mixed with various perchlorates and chlorates. We selected organics from simple molecule forms as for instance PAHs and amino acids to complex material (>30 carbon atoms) such as kerogen. The perchlorate and chlorate salts are prepared at 1 wt % concentration in silica and mixed with the organics to study the potential qualitative and/or quantitative effects.The experiments are performed on a laboratory GC-QMS with a Restek Rxi-5 column (30m x 0.25mm x 0.25μm) and an Intersciences pyrolyser. The mixture is pyrolyzed at different temperatures up to 900◦C to cover the SAM temperature range. Different experiments are done to discriminate the pyrolysis products directly coming from the organics, and those produced from the reaction with oxychlorine. These experiments are under progress and should bring key information on the potential to identify Martian organics when pyrolyzing solid samples. Depending on the organic families studied, we may find recurring molecules, which are potentially present in Mars’ surface samples. This work could thus highlight some organic precursors of the chlorinated compounds found on Mars, and support the interpretation of SAM measurements.
Published: 2016

22. Delayed Sliding Mode Control

Author: Leonid Fridman, Wilfrid Perruquetti, Jean-Pierre Richard, Andrey Polyakov, Denis Efimov, Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Departamento de Ingenieria de Control y Robotica, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), This work was supported in part by ANR Grant CHASLIM (ANR-11-BS03-0007), by CNRS/CONACYT projects 222629, 209731, by CONACyT 261737, by the Government of Russian Federation (Grant 074-U01) and the Ministry of Education and Science of Russian Federation (Project 14.Z50.31.0031), by Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica (UNAM) 113613, DGAPA PASPA Program., Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), and Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM)
Subjects: 0209 industrial biotechnology, 020208 electrical & electronic engineering, Input-to-state stability, Mode (statistics), Sign function, 02 engineering and technology, Sliding mode control, [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, Rate of convergence, Control and Systems Engineering, Control theory, Convergence (routing), 0202 electrical engineering, electronic engineering, information engineering, State observer, Electrical and Electronic Engineering, Realization (systems), Sliding mode, Time delay, Mathematics, Sign (mathematics)
Abstract: A new sliding mode control approach is introduced in this work with the dedicated mathematical tools. A time-delay modification/approximation of sign function is proposed, and it is shown that by substituting this new "sign" realization in the conventional sliding mode algorithms the main advantages of the sliding mode tools are preserved (like rejection of matched disturbances and hyper-exponential convergence, i.e. the rate of convergence to the origin is much faster than any exponential (Polyakov, Efimov, Perruquetti, & Richard, 2014)), while the chattering is reduced. These results are illustrated and confirmed by numerical simulations for the first order sliding mode control and the super-twisting algorithm.
Published: 2016

23. Magnesium sulfate as a key mineral for the detection of organic molecules on Mars using pyrolysis

Author: François, Pascaline, Szopa, Cyril, Buch, Arnaud, Coll, Patrice, Mcadam, Amy C., Mahaffy, Paul R., Freissinet, Caroline, Glavin, Daniel P., Navarro-Gonzalez, Rafael, Cabane, Michel, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, NASA Goddard Space Flight Center (GSFC), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), CNES, Institut Universitaire de France (IUF), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and IMPEC - LATMOS
Subjects: organic molecules, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], magnesium sulfate, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Sample Analysis at Mars, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Mars Science Laboratory, perchlorate, pyrolysis
Abstract: International audience; Pyrolysis of soil or rock samples is the preferred preparation technique used on Mars to search for organic molecules up today. During pyrolysis, oxichlorines present in the soil of Mars release oxidant species that alter the organic molecules potentially contained in the samples collected by the space probes. This process can explain the difficulty experienced by in situ exploration probes to detect organic materials in Mars soil samples until recently. Within a few months, the Curiosity rover should reach and analyze for the first time soils rich in sulfates which could induce a different behavior of the organics during the pyrolysis compared with the types of soils analyzed up today. For this reason, we systematically studied the pyrolysis of organic molecules trapped in magnesium sulfate, in the presence or absence of calcium perchlorate. Our results show that organics trapped in magnesium sulfate can undergo some oxidation and sulfuration during the pyrolysis. But these sulfates are also shown to protect organics trapped inside the crystal lattice and/or present in fluid inclusions from the oxidation induced by the decomposition of calcium perchlorate, and probably other oxychlorine phases currently detected on Mars. Trapped organics may also be protected from degradation processes induced by other minerals present in the sample, at least until these organics are released from the pyrolyzed sulfate mineral (~700 °C in our experiment). Hence, we suggest magnesium sulfate as one of the minerals to target in priority for the search of organic molecules by the Curiosity and ExoMars 2018 rovers.
Published: 2016

24. Mars Organic Matter Revealed by the Detection of Organo-chlorinated Molecules from Pyro-GCMS Analyses of Yellowknife Bay Mudstone

Author: Szopa, Cyril, Freissinet, Caroline, Glavin, Daniel P., Buch, Arnaud, Coll, Patrice, Cabane, Michel, Millan, Maeva, Belmahadi, Imene, Navarro-Gonzalez, Rafael, Steele, Andrew, Summons, Roger, Eigenbrode, Jennifer, Mahaffy, Paul R., PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), NASA Goddard Space Flight Center (GSFC), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Geophysical Laboratory [Carnegie Institution], Carnegie Institution for Science [Washington], Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge] (EAPS), Massachusetts Institute of Technology (MIT), Cardon, Catherine, IMPEC - LATMOS, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), and Carnegie Institution for Science
Subjects: [SDU.ASTR.IM] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.SR] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract: International audience; Mudstones collected on the Yellowknife Bay site in Gale crater by the Curiosity rover, were analyzed with the Sample Analysis at Mars (SAM) chemical laboratory with the aim (among others) to detect and identify organic molecules in the Martian reglith [1]. The pyrolysis (to 900°C)-gas chromatography-mass spectrometry (Pyro-GCMS) analytical mode was systematically used to reach that goal. It revealed the existence of complex interactions between compounds present in the soil sample (e.g. oxychlorines [2]) and internal components of the SAM experiment (e.g. derivatization reactant) resulting in signals complex to interpret [3].By comparing these results with those obtained for the other Mars samples analysed with SAM, and by carefully identifying, from laboratory work, the possible SAM internal contributions to the organic molecules detected [4], chlorobenzene has already been identified as mainly originating from organics present in the mudstone [5]. Since this discovery, we did additional studies of the chromatograms that reveal the presence of dichlorobenzene originating from an organic source endogenous to the sample. Even if the exact original source of these organic molecules cannot be strictly identified, the detection of several chlorinated aromatic molecules suggests the presence of a significant amount of aromatized materials which are in an oxidized state involving oxygen in the mudstone. We present here the corresponding results and the implication it can have on the origin of these organic materials.References: [1] Mahaffy, P. et al. (2012) Space Sci Rev, 170, 401-478. [2] Glavin, D. et al. (2013), JGR. [3] Ming D. et al. (2013), Science 32, 64, [4] Miller K. et al. (In press), JGR, [5] Freissinet et al., (2015), JGR Pla. 120, 495.
Published: 2015

25. Highlight on the indigenous organic molecules detected on Mars by SAM and potential sources of artifacts and backgrounds generated by the sample preparation

Author: Buch, Arnaud, Belmahdi, Imène, Szopa, Cyril, Freissinet, Caroline, Glavin, Daniel P., Coll, Patrice, Cabane, Michel, Millan, Maeva, Eigenbrode, Jennifer, Navarro-Gonzalez, Rafael, Stern, Jennifer, Pinnick, Veronica, Coscia, David, Teinturier, Samuel, Stambouli, Moncef, Dequaire, Tristan, Mahaffy, Paul R., Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), NASA Goddard Space Flight Center (GSFC), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Center for Research and Exploration in Space Science and Technology [GSFC] (CRESST), Cardon, Catherine, PLANETO - LATMOS, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), and Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)
Subjects: [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.SR] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract: International audience; Among the experiments which explore the martian soil aboard the Curiosity Rover, SAM experiment is mainly dedicated to the search for indigenous organic compounds. To reach its goals SAM can operate in different analysis modes: Pyrolysis-GC-MS and Pyrolysis-MS (EGA). In addition SAM includes wet chemistry experiments [1] to supports extraction of polar organic compounds from solid samples that improves their detection either by increasing the release of chemical species from solid sample matrices, or by changing their chemical structure to make compounds more amenable to gas chromatography mass spectrometry (GCMS). The two wet chemistry experimental capabilities of SAM provide alternatives to the nominal inert-thermal desorption/pyrolysis analytical protocol and are more aptly suited for polar components: MTBSTFA derivatization [2-3] and TMAH thermochemolysis [4-5]. Here we focus on the MTBSTFA derivatization experiment.In order to build a support used to help the interpretation of SAM results, we have investigated the artifacts and backgrounds sources generated by the all analysis process: Solid sample were heated up to approximately 840°C at a rate of 35°C/min under He flow. For GC analyses, the majority of the gas released was trapped on a hydrocarbon trap (Tenax®) over a specific temperature range. Adsorbed volatiles on the GC injection trap (IT) were then released into the GC column (CLP-MXT 30m x 0.25mm x 0.25µm) by rapidly heating the IT to 300°C. Then, in order better understand the part of compounds detected coming from internal reaction we have performed several lab experiments to mimic the SAM device: Among the sources of artifact, we test: (1) the thermal stability and the organic material released during the degradation of Tenax® and carbosieve, (2) the impact of MTBSTFA and a mixture of DMF and MTBSTFA on the adsorbent, (3) the reaction between the different adsorbents (Tenax® and Carbosieve) and calcium perchlorate and then (4) the sources and molecules that may constitute organic material precursors sources. References: [1] Mahaffy, P. et al. (2012) Space Sci Rev, 170, 401-478. [2] Glavin, D. et al. (2013), JGR. [3] Leshin L. et al. (2013), Science, [4] Williams, A.J., Eigenbrode, J.L.,m Floyd, M.M., Wilhelm, M.B., and Mahaffy, P.R., (2015), GSA. [5] Eigenbrode, J.L. et al. (2010), LPSC, abst.1460.
Published: 2015

26. Improved methanol electro-oxidation reaction on PdRh-PVP/C electrodes

Author: G. Zacahua-Tlacuatl, E. Ramírez-Meneses, A. Manzo-Robledo, A.M. Torres-Huerta, I. Betancourt, K. Philippot, M. Ibrahim, M.A. Domínguez-Crespo, Instituto Politecnico Nacional [Mexico] (IPN), Universidad Iberoamericana, Instituto de Investigaciones en Materiales (Mexico, Mexico), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Laboratoire de chimie de coordination (LCC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), CONACYT, Instituto Politécnico Nacional, and ‘‘French-Mexican International Laboratory (LIA) LCMMC’’ (Molecular Chemistry and its applications in Materials and Catalysis / CNRS-CONACYT
Subjects: Fuel Technology, Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, Nanoparticles, Palladium-rhodium, [CHIM]Chemical Sciences, Organometallic compounds, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Condensed Matter Physics, Methanol electro-oxidation, Electrocatalysis
Abstract: International audience; Here we report on the organometallic synthesis of polyvinylpyrrolidone (PVP)-stabilized palladium-rhodium nanostructures that display high electrochemical properties when used as carbon-supported electrodes (PdxRh1-x-PVP/C) for methanol oxidation reaction (MOR). These nanostructures were synthesized by hydrogenation of the tris(dibenzylideneacetone)dipalladium(0) (Pd2(dba)3) and tris(allyl) rhodium (Rh(η3-C3H5)3) complexes, in tetrahydrofuran (THF) under mild reaction conditions (room temperature and 3 bar H2) and in the presence of PVP as stabilizer. The influence of methanol concentration (0.5, 1.0 and 2.0 M) as well as different scan rates (5–100 mV s−1) was evaluated to determine changes in the stability and catalytic activity. The organometallic approach and the use of PVP for the preparation of PdRh electrode materials promoted the formation of highly dispersed nanostructures, that led to a remarkably enhanced methanol electro-oxidation in alkaline medium. This high catalytic behavior can reasonably arise from a synergistic effect between Pd and Rh metals as, under the applied conditions, Rh is expected to enhance the Pd ability to oxidize methanol to CO2 (oxophilic character) as well as the catalyst stability. From all the evaluated electrode materials, Pd8Rh2-PVP/C electrode showed the highest mass activity at high methanol concentration (2.0 M) and low scan rate (10 mV s−1). This catalyst showed a performance up to 26 times higher than that of Pd-PVP/C and interestingly an electroactivity superior to that of previously reported PdRh catalysts.
Published: 2023

27. A Note on Continuous Delayed Sliding Mode Control

Author: Denis Efimov, Wilfrid Perruquetti, Andrey Polyakov, Jean-Pierre Richard, Leonid Fridman, Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Departamento de Ingenieria de Control y Robotica, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centrale Lille, Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), and Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM)
Subjects: 0209 industrial biotechnology, Variable structure control, Mode (statistics), Approximation algorithm, Sign function, 02 engineering and technology, Sliding mode control, [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, Control theory, Input-to-state sta-bility, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, State observer, Realization (systems), Sliding mode, Time delay, Sign (mathematics), Mathematics
Abstract: International audience; A new continuous sliding mode control approach is introduced with the dedicated mathematical tools. A time-delay modification/approximation of sign function is proposed, and it is shown that by substituting this new " sign " realization in the conventional sliding mode algorithms the main advantages of the sliding mode tools are preserved (like time of convergence and uniformity of stability with respect to matched disturbances), while the chattering is seriously reduced. These results are illustrated and confirmed by numerical simulations for the first order sliding mode control and the super-twisting algorithm.
Published: 2015

28. First In Situ Wet Chemistry Experiment on Mars Using the SAM Instrument: MTBSTFA Derivatization on a Martian Mudstone

Author: Freissinet, Caroline, Glavin, Daniel, Buch, A., Szopa, Cyril, Kashyap, S., Franz, H., Eigenbrode, Jennifer, Brinckerhoff, W., Navarro-González, R., Teinturier, Samuel, Malespin, C., Benito Prats, Mahaffy, Paul, NASA Goddard Space Flight Center (GSFC), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Buch, Arnaud, and Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM)
Subjects: [SDU.ASTR.IM] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract: International audience; These experiments represent the first successful MTBSTFA derivatization experiment on Mars. Several MTBSTFA reaction products were generated during reactions with the Cumberland mudstone sample at elevated temperatures, with some products containing mass fragments up to m/z 358. We are continuing anthe alysis of this interesting data set to identify these derivatization products that should shed additional light on the chemical nature of the organic matter present in the Cumberland mudstone.
Published: 2015

29. Evidence for indigenous nitrogen in sedimentary and aeolian deposits from the Curiosity rover investigations at Gale crater, Mars

Author: Stern, Jennifer C., Sutter, Brad, Freissinet, Caroline, Navarro-González, Rafael, McKay, Christopher P., Archer, P. Douglas, Buch, Arnaud, Brunner, Anna E., Coll, Patrice, Eigenbrode, Jennifer L., Fairen, Alberto G., Franz, Heather B., Glavin, Daniel P., Kashyap, Srishti, McAdam, Amy C., Ming, Douglas W., Steele, Andrew, Szopa, Cyril, Wray, James J., Martín-Torres, F. Javier, Zorzano, Maria-Paz, Conrad, Pamela G., Mahaffy, Paul R., Kemppinen, Osku, Bridges, Nathan, Johnson, Jeffrey R., Minitti, Michelle, Cremers, David, Bell, James F., Edgar, Lauren, Farmer, Jack, Godber, Austin, Wadhwa, Meenakshi, Wellington, Danika, McEwan, Ian, Newman, Claire, Richardson, Mark, Charpentier, Antoine, Peret, Laurent, King, Penelope, Blank, Jennifer, Weigle, Gerald, Schmidt, Mariek, Li, Shuai, Milliken, Ralph, Robertson, Kevin, Sun, Vivian, Baker, Michael, Edwards, Christopher, Ehlmann, Bethany, Farley, Kenneth, Griffes, Jennifer, Grotzinger, John, Miller, Hayden, Newcombe, Megan, Pilorget, Cedric, Rice, Melissa, Siebach, Kirsten, Stack, Katie, Stolper, Edward, Brunet, Claude, Hipkin, Victoria, Léveillé, Richard, Marchand, Geneviève, Sánchez, Pablo Sobrón, Favot, Laurent, Cody, George, Flückiger, Lorenzo, Lees, David, Nefian, Ara, Martin, Mildred, Gailhanou, Marc, Westall, Frances, Israël, Guy, Agard, Christophe, Baroukh, Julien, Donny, Christophe, Gaboriaud, Alain, Guillemot, Philippe, Lafaille, Vivian, Lorigny, Eric, Paillet, Alexis, Pérez, René, Saccoccio, Muriel, Yana, Charles, Armiens-Aparicio, Carlos, Rodríguez, Javier Caride, Blázquez, Isaías Carrasco, Gómez, Felipe Gómez, Gómez-Elvira, Javier, Hettrich, Sebastian, Malvitte, Alain Lepinette, Jiménez, Mercedes Marín, Martínez-Frías, Jesús, Martín-Soler, Javier, Torres, F. Javier Martín, Jurado, Antonio Molina, Mora-Sotomayor, Luis, Caro, Guillermo Muñoz, López, Sara Navarro, Peinado-González, Verónica, Pla-García, Jorge, Manfredi, José Antonio Rodriguez, Romeral-Planelló, Julio José, Fuentes, Sara Alejandra Sans, Martinez, Eduardo Sebastian, Redondo, Josefina Torres, Urqui-O'Callaghan, Roser, Mier, María-Paz Zorzano, Chipera, Steve, Lacour, Jean-Luc, Mauchien, Patrick, Sirven, Jean-Baptiste, Manning, Heidi, Fairén, Alberto, Hayes, Alexander, Joseph, Jonathan, Squyres, Steven, Sullivan, Robert, Thomas, Peter, Dupont, Audrey, Lundberg, Angela, Melikechi, Noureddine, Mezzacappa, Alissa, DeMarines, Julia, Grinspoon, David, Reitz, Günther, Prats, Benito, Atlaskin, Evgeny, Genzer, Maria, Harri, Ari-Matti, Haukka, Harri, Kahanpää, Henrik, Kauhanen, Janne, Paton, Mark, Polkko, Jouni, Schmidt, Walter, Siili, Tero, Fabre, Cécile, Wray, James, Wilhelm, Mary Beth, Poitrasson, Franck, Patel, Kiran, Gorevan, Stephen, Indyk, Stephen, Paulsen, Gale, Gupta, Sanjeev, Bish, David, Schieber, Juergen, Gondet, Brigitte, Langevin, Yves, Geffroy, Claude, Baratoux, David, Berger, Gilles, Cros, Alain, d’Uston, Claude, Forni, Olivier, Gasnault, Olivier, Lasue, Jérémie, Lee, Qiu-Mei, Maurice, Sylvestre, Meslin, Pierre-Yves, Pallier, Etienne, Parot, Yann, Pinet, Patrick, Schröder, Susanne, Toplis, Mike, Lewin, Éric, Brunner, Will, Heydari, Ezat, Achilles, Cherie, Oehler, Dorothy, Cabane, Michel, Coscia, David, Dromart, Gilles, Robert, François, Sautter, Violaine, Le Mouélic, Stéphane, Mangold, Nicolas, Nachon, Marion, Stalport, Fabien, François, Pascaline, Raulin, François, Teinturier, Samuel, Cameron, James, Clegg, Sam, Cousin, Agnès, DeLapp, Dorothea, Dingler, Robert, Jackson, Ryan Steele, Johnstone, Stephen, Lanza, Nina, Little, Cynthia, Nelson, Tony, Wiens, Roger C., Williams, Richard B., Jones, Andrea, Kirkland, Laurel, Treiman, Allan, Baker, Burt, Cantor, Bruce, Caplinger, Michael, Davis, Scott, Duston, Brian, Edgett, Kenneth, Fay, Donald, Hardgrove, Craig, Harker, David, Herrera, Paul, Jensen, Elsa, Kennedy, Megan R., Krezoski, Gillian, Krysak, Daniel, Lipkaman, Leslie, Malin, Michael, McCartney, Elaina, McNair, Sean, Nixon, Brian, Posiolova, Liliya, Ravine, Michael, Salamon, Andrew, Saper, Lee, Stoiber, Kevin, Supulver, Kimberley, Van Beek, Jason, Van Beek, Tessa, Zimdar, Robert, French, Katherine Louise, Iagnemma, Karl, Miller, Kristen, Summons, Roger, Goesmann, Fred, Goetz, Walter, Hviid, Stubbe, Johnson, Micah, Lefavor, Matthew, Lyness, Eric, Breves, Elly, Dyar, M. Darby, Fassett, Caleb, Blake, David F., Bristow, Thomas, DesMarais, David, Edwards, Laurence, Haberle, Robert, Hoehler, Tori, Hollingsworth, Jeff, Kahre, Melinda, Keely, Leslie, McKay, Christopher, Bleacher, Lora, Brinckerhoff, William, Choi, David, Conrad, Pamela, Dworkin, Jason P., Eigenbrode, Jennifer, Floyd, Melissa, Garvin, James, Glavin, Daniel, Harpold, Daniel, Mahaffy, Paul, Martin, David K., McAdam, Amy, Pavlov, Alexander, Raaen, Eric, Smith, Michael D., Stern, Jennifer, Tan, Florence, Trainer, Melissa, Meyer, Michael, Posner, Arik, Voytek, Mary, Anderson, Robert C, Aubrey, Andrew, Beegle, Luther W., Behar, Alberto, Blaney, Diana, Brinza, David, Calef, Fred, Christensen, Lance, Crisp, Joy A., DeFlores, Lauren, Feldman, Jason, Feldman, Sabrina, Flesch, Gregory, Hurowitz, Joel, Jun, Insoo, Keymeulen, Didier, Maki, Justin, Mischna, Michael, Morookian, John Michael, Parker, Timothy, Pavri, Betina, Schoppers, Marcel, Sengstacken, Aaron, Simmonds, John J., Spanovich, Nicole, Juarez, Manuel de la Torre, Vasavada, Ashwin R., Webster, Christopher R., Yen, Albert, Archer, Paul Douglas, Cucinotta, Francis, Jones, John H., Ming, Douglas, Morris, Richard V., Niles, Paul, Rampe, Elizabeth, Nolan, Thomas, Fisk, Martin, Radziemski, Leon, Barraclough, Bruce, Bender, Steve, Berman, Daniel, Dobrea, Eldar Noe, Tokar, Robert, Vaniman, David, Williams, Rebecca M. E., Yingst, Aileen, Lewis, Kevin, Leshin, Laurie, Cleghorn, Timothy, Huntress, Wesley, Manhès, Gérard, Hudgins, Judy, Olson, Timothy, Stewart, Noel, Sarrazin, Philippe, Grant, John, Vicenzi, Edward, Wilson, Sharon A., Bullock, Mark, Ehresmann, Bent, Hamilton, Victoria, Hassler, Donald, Peterson, Joseph, Rafkin, Scot, Zeitlin, Cary, Fedosov, Fedor, Golovin, Dmitry, Karpushkina, Natalya, Kozyrev, Alexander, Litvak, Maxim, Malakhov, Alexey, Mitrofanov, Igor, Mokrousov, Maxim, Nikiforov, Sergey, Prokhorov, Vasily, Sanin, Anton, Tretyakov, Vladislav, Varenikov, Alexey, Vostrukhin, Andrey, Kuzmin, Ruslan, Clark, Benton, Wolff, Michael, McLennan, Scott, Botta, Oliver, Drake, Darrell, Bean, Keri, Lemmon, Mark, Schwenzer, Susanne P., Anderson, Ryan B., Herkenhoff, Kenneth, Lee, Ella Mae, Sucharski, Robert, Hernández, Miguel Ángel de Pablo, Ávalos, Juan José Blanco, Ramos, Miguel, Kim, Myung-Hee, Malespin, Charles, Plante, Ianik, Muller, Jan-Peter, Ewing, Ryan, Boynton, William, Downs, Robert, Fitzgibbon, Mike, Harshman, Karl, Morrison, Shaunna, Dietrich, William, Kortmann, Onno, Palucis, Marisa, Sumner, Dawn Y., Williams, Amy, Lugmair, Günter, Wilson, Michael A., Rubin, David, Jakosky, Bruce, Balic-Zunic, Tonci, Frydenvang, Jens, Jensen, Jaqueline Kløvgaard, Kinch, Kjartan, Koefoed, Asmus, Madsen, Morten Bo, Stipp, Susan Louise Svane, Boyd, Nick, Campbell, John L., Gellert, Ralf, Perrett, Glynis, Pradler, Irina, VanBommel, Scott, Jacob, Samantha, Owen, Tobias, Rowland, Scott, Savijärvi, Hannu, Boehm, Eckart, Böttcher, Stephan, Burmeister, Sönke, Guo, Jingnan, Köhler, Jan, García, César Martín, Mueller-Mellin, Reinhold, Wimmer-Schweingruber, Robert, Bridges, John C., McConnochie, Timothy, Benna, Mehdi, Franz, Heather, Bower, Hannah, Brunner, Anna, Blau, Hannah, Boucher, Thomas, Carmosino, Marco, Atreya, Sushil, Elliott, Harvey, Halleaux, Douglas, Rennó, Nilton, Wong, Michael, Pepin, Robert, Elliott, Beverley, Spray, John, Thompson, Lucy, Gordon, Suzanne, Newsom, Horton, Ollila, Ann, Williams, Joshua, Vasconcelos, Paulo, Bentz, Jennifer, Nealson, Kenneth, Popa, Radu, Kah, Linda C., Moersch, Jeffrey, Tate, Christopher, Day, Mackenzie, Kocurek, Gary, Hallet, Bernard, Sletten, Ronald, Francis, Raymond, McCullough, Emily, Cloutis, Ed, ten Kate, Inge Loes, Arvidson, Raymond, Fraeman, Abigail, Scholes, Daniel, Slavney, Susan, Stein, Thomas, Ward, Jennifer, Berger, Jeffrey, Moores, John E., NASA Goddard Space Flight Center (GSFC), NASA Johnson Space Center (JSC), NASA, Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), NASA Ames Research Center (ARC), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, ASU School of Earth and Space Exploration (SESE), Arizona State University [Tempe] (ASU), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Department of Astronomy [Ithaca], Cornell University [New York], Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Center for Research and Exploration in Space Science and Technology [GSFC] (CRESST), Centre de Recherche Public Henri Tudor [Technoport] (CRP Henri Tudor), Centre de Recherche Public Henri-Tudor [Luxembourg] (CRP Henri-Tudor), Department of Microbiology [Amherst], University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS)-University of Massachusetts System (UMASS), Astromaterials Research and Exploration Science (ARES), NASA-NASA, Geophysical Laboratory [Carnegie Institution], Carnegie Institution for Science, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), School of Earth and Atmospheric Sciences [Atlanta], Georgia Institute of Technology [Atlanta], Instituto Andaluz de Ciencias de la Tierra (IACT), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universidad de Granada (UGR), Department of Computer Science, Electrical and Space Engineering [Luleå], Luleå University of Technology (LUT), Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Carnegie Institution for Science [Washington], Universidad de Granada (UGR)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Cornell University, Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Department of Microbiology, IMPEC - LATMOS, Universidad de Granada (UGR)-Consejo Superior de Investigaciones Científicas [Spain] (CSIC), and Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universidad de Granada = University of Granada (UGR)
Subjects: Martian, Multidisciplinary, 010504 meteorology & atmospheric sciences, Water on Mars, nitrates, astrobiology, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Mars, Mars Exploration Program, 01 natural sciences, nitrogen, Astrobiology, Curiosity, 13. Climate action, Rocknest, 0103 physical sciences, Sample Analysis at Mars, Physical Sciences, Aeolian processes, Composition of Mars, 010303 astronomy & astrophysics, Nitrogen cycle, Geology, 0105 earth and related environmental sciences
Abstract: International audience; The Sample Analysis at Mars (SAM) investigation on the Mars Science Laboratory (MSL) Curiosity rover has detected oxidized nitrogen-bearing compounds during pyrolysis of scooped aeolian sediments and drilled sedimentary deposits within Gale crater. Total N concentrations ranged from 20 to 250 nmol N per sample. After subtraction of known N sources in SAM, our results support the equivalent of 110–300 ppm of nitrate in the Rocknest (RN) aeolian samples, and 70–260 and 330–1,100 ppm nitrate in John Klein (JK) and Cumberland (CB) mudstone deposits, respectively. Discovery of indigenous martian nitrogen in Mars surface materials has important implications for habitability and, specifically, for the potential evolution of a nitrogen cycle at some point in martian history. The detection of nitrate in both wind-drifted fines (RN) and in mudstone (JK, CB) is likely a result of N2 fixation to nitrate generated by thermal shock from impact or volcanic plume lightning on ancient Mars. Fixed nitrogen could have facilitated the development of a primitive nitrogen cycle on the surface of ancient Mars, potentially providing a biochemically accessible source of nitrogen.
Published: 2015

30. Sialic Acid Expression in the Mosquito Aedes aegypti and Its Possible Role in Dengue Virus-Vector Interactions

Author: Blanca H. Ruiz-Ordaz, Edgar Zenteno, Guillermo Mendoza-Hernández, Humberto Lanz-Mendoza, Philippe Delannoy, Carlos Cabello-Gutiérrez, Verónica Monroy-Martínez, Jorge Cime-Castillo, Fidel de la Cruz Hernández-Hernández, Anne Harduin-Lepers, Universidad Nacional Autónoma de México (UNAM), Unité de Glycobiologie Structurale et Fonctionnelle UMR 8576 (UGSF), Institut National de la Recherche Agronomique (INRA)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université Lille Nord de France (COMUE), National Institute of Public Health (CISEI), National Institute of Public Health, Infectomics and Molecular Pathogenesis Department (CINVESTAV-IPN), 5Infectomics and Molecular Pathogenesis Department (CINVESTAV-IPN), Virology Department, National Respiratory Institute (INER), 6Virology Department, National Respiratory Institute (INER), Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 (UGSF), Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institute of Botany, Universität für Bodenkultur Wien [Vienne, Autriche] (BOKU), Departamento de Bioquímica, Facultad de Medicina, Uni, CNRS, Université de Lille, Universidad Nacional Autónoma de México = National Autonomous University of Mexico [UNAM], Unité de Glycobiologie Structurale et Fonctionnelle UMR 8576 [UGSF], National Institute of Public Health = Instituto Nacional de Salud Pública [Cuernavaca, Mexique] [INSP], and Center for Research and Advanced Studies of the National Polytechnic Institute [CINVESTAV-IPN]
Subjects: [SDV.BIO]Life Sciences [q-bio]/Biotechnology, viruses, lcsh:Medicine, Dengue virus, medicine.disease_cause, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, Dengue fever, chemistry.chemical_compound, Aedes, Cricetinae, Vector (molecular biology), beta-D-Galactoside alpha 2-6-Sialyltransferase, ComputingMilieux_MISCELLANEOUS, 0303 health sciences, [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], 030302 biochemistry & molecular biology, virus diseases, [SDV.BBM.MN]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular Networks [q-bio.MN], General Medicine, [SDV.BIBS]Life Sciences [q-bio]/Quantitative Methods [q-bio.QM], 3. Good health, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biomolecules [q-bio.BM], Host-Pathogen Interactions, Insect Proteins, Research Article, Article Subject, education, [SDV.CAN]Life Sciences [q-bio]/Cancer, Aedes aegypti, CHO Cells, Biology, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, Cricetulus, [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN], medicine, Animals, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM], Saliva, 030304 developmental biology, General Immunology and Microbiology, lcsh:R, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, Dengue Virus, biochemical phenomena, metabolism, and nutrition, medicine.disease, biology.organism_classification, Virology, N-Acetylneuraminic Acid, Sialyltransferases, Sialic acid, chemistry, Tissue tropism, N-Acetylneuraminic acid
Abstract: Dengue fever (DF) is the most prevalent arthropod-borne viral disease which affects humans. DF is caused by the four dengue virus (DENV) serotypes, which are transmitted to the host by the mosquitoAedes aegyptithat has key roles in DENV infection, replication, and viral transmission (vector competence). Mosquito saliva also plays an important role during DENV transmission. In this study, we detected the presence of sialic acid (Sia) inAedes aegyptitissues, which may have an important role during DENV-vector competence. We also identified genome sequences encoding enzymes involved in Sia pathways. The cDNA forAedes aegyptiCMP-Sia synthase (CSAS) was amplified, cloned, and functionally evaluated via the complementation of LEC29.Lec32 CSAS-deficient CHO cells.AedesCSAS-transfected LEC29.Lec32 cells were able to express Sia moieties on the cell surface. Sequences related toα-2,6-sialyltransferase were detected in theAedes aegyptigenome. Likewise, we identified Sia-α-2,6-DENV interactions in different mosquito tissues. In addition, we evaluated the possible role of sialylated molecules in a salivary gland extract during DENV internalization in mammalian cells. The knowledge of early DENV-host interactions could facilitate a better understanding of viral tropism and pathogenesis to allow the development of new strategies for controlling DENV transmission.
Published: 2015

31. In Situ Analysis of Mars Soil and Rocks Sample with the Sam Gcms Instrumentation Onboard Curiosity : Interpretation and Comparison of Measurements Done during the First Martian Year of Curiosity on Mars

Author: Szopa, Cyril, Coll, Patrice, Cabane, Michel, Buch, Arnaud, Coscia, David, Millan, Maeva, Francois, Pascaline, Belmahadi, Imene, Teinturier, Samuel, Navarro-Gonzalez, Rafael, Glavin, Daniel, Freissinet, Caroline, Steele, Andrew, Eigenbrode, Jennifer, Mahaffy, Paul, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, NASA Goddard Space Flight Center (GSFC), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Geophysical Laboratory [Carnegie Institution], Carnegie Institution for Science, Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Carnegie Institution for Science [Washington], Cardon, Catherine, IMPEC - LATMOS, and Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract: International audience; The characterisation of the chemical and mineralogical composition of solid surface samples collected with the Curiosity rover is a primary objective of the SAM experiment. These data should provide essential clues on the past habitability of Gale crater. Amongst the SAM suite of instruments [1], SAM-GC (Gas Chromatograph) is devoted to identify and quantify volatiles evolved from the thermal (heating up to about 900°C)/chemical (derivatization procedure) treatment of any soil sample collected by the Curiosity rover. With the aim to search for potential organic molecules outgassed from the samples, SAM-GC analytical channels composed of thermal-desorption injector, and a MXT-CLP or a MXT-Q chromatographic column was chosen to achieve all the measurements done up today, with the aim to separate of a wide range of volatile inorganic and organic molecules. Four solid samples have been analyzed with GCMS, one sand sample collected at the Rocknest site, two rock samples (John Klein and Cumberland respectively) collected at the Yellowknife Bay site using the Curiosity driller, and one rock sample collected at the Kimberly site.All the measurements were successful and they produced complex chromatograms with both detectors used for SAM GC, i.e. a thermal conductivity detector and the SAM quandrupole mass spectrometer. Their interpretation already revealed the presence of an oxychlorine phase present in the sample which is at the origin of chlorohydrocarbons clearly identified [2] but this represents only a fraction of the GCMS signal recorded [3,4]. This work presents a systematic comparison of the GCMS measurements done for the different samples collected, supported by reference data obtained in laboratory with different spare models of the gas chromatograph, with the aim to bring new elements of interpretation of the SAM measurements.References: [1] Mahaffy, P. et al. (2012) Space Sci Rev, 170, 401-478. [2] Glavin, D. et al. (2013), JGR. [3] Leshin L. et al. (2013), Science, [4] Ming D. et al. (2013), Science, 32, 64–67.Acknowledgements: SAM-GC team acknowledges support from the French Space Agency (CNES), French National Programme of Planetology (PNP), National French Council (CNRS), Pierre Simon Laplace Institute, Institut Universitaire de France (IUF) and ESEP Labex, and the great MSL team
Published: 2014

32. A Kalman condition for the controllability of a coupled system of Stokes equations

Author: Takahashi, Takéo, de Teresa, Luz, Wang, Yingying, Institut Élie Cartan de Lorraine (IECL), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Systems with physical heterogeneities : inverse problems, numerical simulation, control and stabilization (SPHINX), Inria Nancy - Grand Est, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Instituto de Matematicas (UNAM), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Luz de Teresa is partially supported by Conacyt, project A1-S-17475, ANR-20-CE40-0009,TRECOS,Nouvelles directions en contrôle et stabilisation: Contraintes et termes non-locaux(2020), Takahashi, Takéo, and Nouvelles directions en contrôle et stabilisation: Contraintes et termes non-locaux - - TRECOS2020 - ANR-20-CE40-0009 - AAPG2020 - VALID
Subjects: Navier-Stokes systems, Null controllability, [MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP], [MATH.MATH-OC] Mathematics [math]/Optimization and Control [math.OC], [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC], [MATH.MATH-AP] Mathematics [math]/Analysis of PDEs [math.AP], Carleman estimates
Abstract: We consider the controllability of a class of systems of n Stokes equations, coupled through terms of order zero and controlled by m distributed controls. Our main result states that such a system is null-controllable if and only if a Kalman type condition is satisfied. This generalizes the case of finite-dimensional systems and the case of systems of coupled linear heat equations. The proof of the main result relies on the use of the Kalman operator introduced in [1] and on a Carleman estimate for a cascade type system of Stokes equations. Using a fixed-point argument, we also obtain that if the Kalman condition is verified, then the corresponding system of Navier-Stokes equations is locally null-controllable.
Published: 2023

33. Identification des microvésicules génératrices de plasmine : De minuscules messagers impliqués dans la fibrinolyse et la protéolyse

Author: Plawinski, Laurent, Cras, Audrey, Hernández Lopez, José Rubicel, de la Peña, Aurora, van der Heyden, Angéline, Belle, Catherine, Toti, Florence, Anglés-Cano, Eduardo, Angles-Cano, Eduardo, Microvesicules endothéliales : Nouveau lien entre parodontite et athérothrombose ? - - ENDOPAROMP2017 - ANR-17-CE17-0024 - AAPG2017 - VALID, Complexes de Coordination pour Explorer la Reconnaissance de Phospholipides et le Développement de Sondes pour les Membranes Activées - - COCERP2016 - ANR-16-CE29-0009 - AAPG2016 - VALID, Laboratoire de Physique des Deux Infinis Bordeaux (LP2I - Bordeaux), Université de Bordeaux (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Hopital Saint-Louis [AP-HP] (AP-HP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Département de Chimie Moléculaire (DCM), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Nanomédecine Régénérative (NanoRegMed), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Innovations thérapeutiques en hémostase (IThEM - U1140), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité), Inserm, ANR projects, ANR-17-CE17-0024,ENDOPAROMP,Microvesicules endothéliales : Nouveau lien entre parodontite et athérothrombose ?(2017), and ANR-16-CE29-0009,COCERP,Complexes de Coordination pour Explorer la Reconnaissance de Phospholipides et le Développement de Sondes pour les Membranes Activées(2016)
Subjects: [SDV] Life Sciences [q-bio], [SDV]Life Sciences [q-bio], plasminogen, uPA, tPA, pericellular proteolysis, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, extracellular vesicles, zinc complexes, microvesicles, [SDV.BC] Life Sciences [q-bio]/Cellular Biology, fibrinolysis crosstalk
Abstract: A number of stressors and inflammatory mediators (cytokines, proteases, oxidative stress mediators) released during inflammation or ischemia stimulate and activate cells in blood, the vessel wall or tissues. The most well-known functional and phenotypic responses of activated cells are (1) the immediate expression and/or release of stored or newly synthesized bioactive molecules, and (2) membrane blebbing followed by release of microvesicles. An ultimate response, namely the formation of extracellular traps by neutrophils (NETs), is outside the scope of this work. The main objective of this article is to provide an overview on the mechanism of plasminogen reception and activation at the surface of cell-derived microvesicles, new actors in fibrinolysis and proteolysis. The role of microvesicle-bound plasmin in pathological settings involving inflammation, atherosclerosis, angiogenesis, and tumour growth, remains to be investigated. Further studies are necessary to determine if profibrinolytic microvesicles are involved in a finely regulated equilibrium with pro-coagulant microvesicles, which ensures a balanced haemostasis, leading to the maintenance of vascular patency., Un certain nombre de facteurs de stress et de médiateurs inflammatoires (cytokines, protéases, médiateurs du stress oxydatif) libérés pendant l'inflammation ou l'ischémie stimulent et activent les cellules du sang, de la paroi vasculaire ou des tissus. Les réponses fonctionnelles et phénotypiques les plus connues des cellules activées sont (1) l'expression et/ou la libération immédiate de molécules bioactives stockées ou nouvellement synthétisées, et (2) le décollement de la membrane suivi de la libération de microvésicules. Une réponse ultime, à savoir la formation de pièges extracellulaires par les neutrophiles (NETs), sort du cadre de ce travail. L'objectif principal de cet article est de donner un aperçu du mécanisme de réception et d'activation du plasminogène à la surface des microvésicules dérivées des cellules, nouveaux acteurs de la fibrinolyse et de la protéolyse. Le rôle de la plasmine liée aux microvésicules dans des contextes pathologiques impliquant l'inflammation, l'athérosclérose, l'angiogenèse et la croissance tumorale, reste à étudier. D'autres études sont nécessaires pour déterminer si les microvésicules profibrinolytiques sont impliquées dans un équilibre finement régulé avec les microvésicules pro-coagulantes, qui assure une hémostase équilibrée, conduisant au maintien de la perméabilité vasculaire.
Published: 2023

34. Drivers of soil biophysical processes along an elevational gradient at Pico de Orizaba volcano, Mexico

Author: Guillermo Angeles, Marycruz Álvarez-Jiménez, Fabien Anthelme, Isabelle Barois, José Luis Chaparro Carrillo, Nereyda Cruz-Maldonado, Thibaud Decaens, Martín de los Santos-Bailón, Stéphane Fourtier, Emmanuel García-Gutiérrez, David García-Segura, Rodrigo Gómez-Aguilar, Antonio Gómez-Anaya, Eduardo Hernández, Daniel Hernández-Cáceres, Leonor Jiménez, Beatriz E. Marín-Castro, Luis Merino-Martín, Marco A. Morales-Martínez, Edwin U. Monfil-León, René A. Palestina, Carlos Pimentel-Reyes, Ricardo Quiroz Reyes, Frédérique Reverchon, Hervé Rey, Catherine Roumet, Christina D. Siebe-Grabach, Katrin Sieron, Víctor Vázques Reyes, Monique Weemstra, Alexia Stokes, Instituto de Ecologia (INECOL), Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université de Montpellier (UM), Universidad Autónoma del Estado de México (UAEM), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Autonomous University of Coahuila, Partenaires INRAE, Universidad Veracruzana, Universidad Rey Juan Carlos [Madrid] (URJC), Universidad de Ciencias y Artes de Chiapas, Inrae, Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), CONACYT–2 73659, and ANR-16-CE03-0009,ECOPICS,Services écosystémiques souterrains produits par les communautés végétales le long de gradients altitudinaux en France et au Mexique(2016)
Subjects: Cultural Studies, Bulk soil and rhizosphere microbial communities, Carbon storage, Soil structure and soil moisture monitoring, High mountain ecosystem, [SDE]Environmental Sciences, Religious studies, Plant community traits, Soil hydrophysical properties, Soil macro and meso‑fauna, Elevational gradient, Soil biodiversity
Abstract: Elevational gradients are characterized by major shifts in environmental conditions, reflected through changes in climatic and soil variables. These shifts strongly impact the composition, community structure and specific functional traits of vegetation. Vegetation, in turn, influences soil properties through litter input, root growth and the release of root exudates, thereby influencing soil microbial and faunal communities. Here, we report and briefly describe data of soil and underlying bedrock physical and chemical properties, climatic variables, plant community composition and species abundance, soil microbial diversity and macro and mesofaunal abundance and diversity. Data are provided for 6 elevations (3400–4600 m) ranging from pine forest to alpine prairie. We focused on soil biophysical properties beneath several keystone or community-structuring plant species with different growth forms: (1) tree (Pinus hartwegii Lindl.); shrub (Oxylobus arbutifolius (Kunth) A. Gray and Chionolaena lavandulifolia (Kunth ex Kunth) Benth. & Hook.f. ex B.D.Jacks.); and (3) herb (Lupinus montanus Kunth and Senecio roseus Sch.Bip.). These data are useful for understanding how shifts in abiotic conditions and vegetation communities along an elevational gradient affect soil ecosystem services such as water infiltration, soil aggregation and carbon (C) storage, and modify soil biodiversity. The collected data also provide useful information to understand how alpine vegetation, soil macro- and meso-fauna, and soil bacterial communities may shift under a climate change scenario.
Published: 2023

35. An Analysis of Convergence Properties of Finite-Time Homogeneous Controllers Through Its Implementation in a Flexible-Joint Robot

Author: Mendoza-Avila, Jesús, Efimov, Denis, Fridman, Leonid, Moreno Pérez, Jaime, Finite-time control and estimation for distributed systems (VALSE), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)
Subjects: [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract: International audience; A study of the stability of interconnected homogeneous systems, affected by singular perturbations, is presented by means of the implementation of finite-time composite control in a single-link flexible-joint robot. Previous results suggest that the implementation of finite-time convergent controllers leads to the arising of chattering. Now, throughout a practical example we show that the design of a controller making the whole system homogeneous avoids the undesired chattering and recovers the ideal finite-time convergence properties. Regrettably, information of the states of the fast dynamics is not commonly available, then the proposed strategy is not applicable at all. Nevertheless, the main interest of our study lays in the expansion of the panorama for a better understanding of the causes of chattering, which contributes to the development of chattering reduction techniques, and has attracted a lot of attention, nowadays.
Published: 2022

36. El Ciclo Ándico de Groeber en la cuenca Neuquina, una revisión y actualización

Author: Aguirre-Urreta, Beatriz, Caramés, Andrea, Cataldo, Cecilia S., Concheyro, Andrea, Herrera, Yanina, Lazo, Darío G., Lescano, Marina, López-Martínez, Rafael, Luci, Leticia, Marín, Luciana S., Martinez, Mathieu, Naipauer, Maximiliano, Pellenard, Pierre, Pino, Diego A., Ramos, Victor A., Tunik, Maisa, Vennari, Verónica, Instituto de Estudios Andinos 'Don Pablo Groeber' (INDEAN), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Facultad de Ciencias Exactas y Naturales [Buenos Aires] (FCEyN), Universidad de Buenos Aires [Buenos Aires] (UBA)-Universidad de Buenos Aires [Buenos Aires] (UBA), Instituto Antártico Argentino, División Paleontología Vertebrados, Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Universidad Nacional de la Plata [Argentine] (UNLP), Instituto de Geologia, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Géosciences Rennes (GR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Instituto de Geocronología y Geología Isotópica, Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Universidad de Buenos Aires [Buenos Aires] (UBA), Biogéosciences [UMR 6282] (BGS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Instituto de Investigación en Paleobiología y Geología [Río Negro] (IIPG), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Universidad Nacional de Río Negro (UNRN), Instituto de Evolución, Ecología Histórica y Ambiente, Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Universidad Técnica del Norte (UTN), P. Kress, D. Guerberoff, M. Miller, F. Pagan, E. Schwarz, R. Domínguez, V. Hammar, A. Mosquera & M. Ragazzi, Laffont, Rémi, and P. Kress, D. Guerberoff, M. Miller, F. Pagan, E. Schwarz, R. Domínguez, V. Hammar, A. Mosquera & M. Ragazzi
Subjects: Mesozoico, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, [SDU.STU.ST] Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Estratigrafía, Andes, Geocronología, Paleontología
Abstract: A state of the knowledge of the Andean cycle is presented, mainly based on our recent works, butalso on highlights of recent research of many colleagues. This synthesis allowed us to update thegeochronology of its different units. New absolute ages through U-Pb analysis in zircons by differentmethods complement those previously carried out and made possible to accurately limit the ageof these units. We have been able to define the boundary between the Tordillo and Vaca MuertaFormations very precisely between 147 and 146 Ma; the age of the Agrio Formation between 132 and126 Ma, and to present the first absolute ages of the Huitrín Formation. All these data are screenedthrough precise biostratigraphy, sequence stratigraphy and astrochronology. The Troncoso Memberof the Huitrín Formation yielded an age of 123 Ma that placed it in the Barremian. This is partiallycorroborated by the finding of fossils in the La Tosca Member with trigonioids and foraminifera ofundoubted marine origin, dated with nannofossils of early Barremian age indicating the permanence ofcommunication with the Pacific during the deposition of the Huitrín Formation.
Published: 2022

37. Impact of the Sample Preparation on the Organic Compounds Detetected on Mars at JK and CB

Author: Buch, A., Szopa, Cyril, Freissinet, Caroline, Glavin, Daniel, Coll, Patrice, Cabane, Michel, Eigenbrode, J., Miller, K., Martin, M., Summons, R., Archer, D., Brunner, A., Conrad, P., Teinturier, Samuel, Coscia, David, Dworkin, J., Grotzinger, J., Mahaffy, Paul, Mckay, C., Ming, D., Navarro-González, R., Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), NASA Goddard Space Flight Center (GSFC), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Massachusetts Institute of Technology (MIT), Catholic University of America, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), California Institute of Technology (CALTECH), NASA Ames Research Center (ARC), NASA Johnson Space Center (JSC), NASA, Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), PLANETO - LATMOS, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), and Buch, Arnaud
Subjects: [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology
Abstract: International audience; We have confirm the presence of MTBSTFAby-productsin the EGA and GC-TCD-MS background signals. Major part of aromatic detected compoundson marscould be generate from the degradation of the Tenax® trap or from the MTBSTFA reaction. the possible range of products that might be produced by the SAMbackground and the Tenax trap are being elucidated by laboratory studies and it will help clarify which of the compoiunds observed by SAM are indi-geneous.
Published: 2014

38. From SAM Instrument Background to Martian Signal: Challenges of Solid Sample Analyses on Mars

Author: Freissinet, Caroline, Glavin, Daniel P., Miller, K., Buch, Arnaud, Brunner, A., Cabane, Michel, Eigenbrode, Jennifer, Fairen, A., Kashyap, S., Martin, M., Navarro-Gonzalez, Rafael, Steele, A., Summons, R. E., Szopa, Cyril, Mahaffy, Paul R., NASA Goddard Space Flight Center (GSFC), Massachusetts Institute of Technology (MIT), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Geophysical Laboratory [Carnegie Institution], Carnegie Institution for Science, Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Carnegie Institution for Science [Washington], and Buch, Arnaud
Subjects: [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology
Abstract: International audience; Taken together, these results indicatethat the internal SAM sources createa background that challengesthe analysis of solid samplesin search for organics, creating interferences between terrestrial andpossible indigenous carbon sources. We have been exploring the possibility of SAM-derived C contributions to chlorohydrocarbon generation. Current observations provide no direct link between SAM internal sourcesand the chlorohydrocarbons detected on Mars, thus a martian organic contribution to the chloromethanes, dichloroalkanes and chlorobenzene detected at CBis possible.
Published: 2014

39. Gas-Chromatographic analysis of Mars soil samples with the SAM instrument onboard Curiosity - the 359 first sols

Author: Szopa, Cyril, Navarro-Gonzalez, Rafael, Mahaffy, Paul, Buch, Arnaud, Goutail, Jean-Pierre, Cabane, Michel, Glavin, Daniel, Correia, Jean-Jacques, Coll, Patrice, Freissinet, Caroline, Meftah, Mustapha, Coscia, David, Teinturier, Samuel, Brunner, Anna, Bonnet, Jean-Yves, Millan, Maeva, Cardon, Catherine, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), NASA Goddard Space Flight Center (GSFC), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), IMPEC - LATMOS, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), and Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [PHYS.PHYS.PHYS-AO-PH] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]
Abstract: International audience; Amongst the SAM suite of instruments, SAM-GC (Gas Chromatograph) is devoted to identify and quantify volatiles evolved from the thermal/chemical treatment of any soil sample collected by the Curiosity rover. The first soil samples analyzed with SAM were composed of windblown dust and sand collected at the Rocknest site, while the second site analyzed was a basin called “Yellowknife Bay” where two holes were drilled (John Klein & Cumberland) and analysis showed these sites to be a fluvio-lacustrine sediment.. For their analysis, these samples were subjected to a pyrolysis at temperatures reaching about 850°C. For SAM-GC and GCMS analyses, different fractions of pyrolysates were collected at different temperature in the ambient-900°C range in order to discriminate potential different volatile fractions present in the solid sample. With the aim to search for potential organic molecules outgassed from the samples, a SAM-GC analytical channel composed of a thermal-desorption injector and a MXT-CLP chromatographic column was used as it was designed for the separation of a wide range of volatile organic molecules. This channel is also equipped with a thermal conductivity detector (TCD) capable to detect the most abundant species (with abundances down to approximately 10-10mol). His channel is thus complementary to the mass spectrometer detection for quantification of such species, as this last instrument does not have linear response in this domain of high abundance, whereas it is significantly more sensitive than the TCD. The results obtained with this instrument first show that the performances of SAM-GC is representative of those obtained during calibrations of the instrument in laboratory, and also that results are repeatable. Hence, the instrument performs nominally, making it the first GCMS running successfully on Mars since the Viking missions (middle of the 70’s). Moreover, the complementarity of GC towards MS is also shown, both by allowing the quantification of the major species detected (as water), and by providing a chromatographic signal, that is well resolved temporally which can be used to improve the QMS signal treatment. In the frame of research of organics, the SAM-GC analyses contribute to the identification of several compounds even at trace levels, giving clues on the chemical content of both loose surface and rock materials. These detections are of course linked to the question of preservation and evolution of organic material in the Mars environment, and this will be discussed in further details.
Published: 2014

40. Putative cryomagma interaction with aerosols deposit at Titan's surface

Author: Coll, Patrice, Navarro-Gonzalez, Rafael, Raulin, François, Coscia, David, Ramirez, Sandra I., Buch, Arnaud, Szopa, Cyril, Poch, Olivier, Cabane, Michel, Brassé, Coralie, Cardon, Catherine, Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, Physikalisches Institut [Bern], Universität Bern [Bern], Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), PLANETO - LATMOS, and Universität Bern [Bern] (UNIBE)
Subjects: [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract: International audience; The largest moon of Saturn, Titan, is known for its dense, nitrogen-rich atmosphere. The organic aerosols which are produced in Titan’s atmosphere are of great astrobiological interest, particularly because of their potential evolution when they reach the surface and may interact with putative ammonia-water cryomagma [1]. In this context we have followed the evolution of alkaline pH hydrolysis (25wt% ammonia-water) of Titan aerosol analogues, that have been qualified as representative of Titan’s aerosols [2]. Indeed the first results obtained by the ACP experiment onboard Huygens probe revealed that the main products obtained after thermolysis of Titan’s collected aerosols, were ammonia (NH3) and hydrogen cyanide (HCN). Then performing a direct comparison of the volatiles produced after a thermal treatment done in conditions similar to the ones used by the ACP experiment, we may estimate that the tholins we used are relevant to chemical analogues of Titan’s aerosols, and to note free of oxygen. Taking into account recent studies proposing that the subsurface ocean may contain a lower fraction of ammonia (about 5wt% or less [3]), and assuming the presence of specific gas species [4, 5], in particular CO2 and H2S, trapped in likely internal ocean, we determine a new probable composition of the cryomagma which could potentially interact with deposited Titan’s aerosols. We then carried out different hydrolyses, taking into account this composition, and we established the influence of the hydrolysis temperature on the organic molecules production. References: [1] Mitri et al., 2008. Resurfacing of Titan by ammonia-water cryomagma. Icarus. 196, 216-224. [2] Coll et al. 2013, Can laboratory tholins mimic the chemistry producing Titan's aerosols? A review in light of ACP experimental results, Planetary and Space Science 77, 91-103. [3] Tobie et al. 2012. Titan’s Bulk Composition Constrained by Cassini-Huygens: implication for internal outgassing. The Astrophysical Journal. 752, 125. [4] Hersant et al., 2004. Enrichment in volatiles in the giant planets of the Solar System. Planetary and Space Science. 52, 623-641. [5] Hersant et al., 2008. Interpretation of the carbon abundance in Saturn measured by Cassini. Planetary and Space Science. 56, 1103-1111.
Published: 2014

41. Determination of the Possible Source of Chlorinated Hydrocarbons Detected By SAM during MSL Mission

Author: Buch, Arnaud, Belmahdi, Imene, Szopa, Cyril, Freissinet, Caroline, Glavin, Daniel, Francois, Pascaline, Coll, Patrice, Miller, Kristen, Eigenbrode, Jennifer, Stern, Jennifer, Navarro-Gonzalez, Rafael, McAdam, Amy, Teinturier, Samuel, Bonnet, Jean-Yves, Summons, Roger, Millan, Maeva, Dequaire, Tristan, Cabane, Michel, Mahaffy, Paul, Cardon, Catherine, Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), NASA Goddard Space Flight Center (GSFC), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), MIT Lincoln Laboratory, Massachusetts Institute of Technology (MIT), Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge] (EAPS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Laboratoire de Génie des Procédés et Matériaux - EA 4038 ( LGPM ), IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), NASA Goddard Space Flight Center ( GSFC ), Laboratoire inter-universitaire des systèmes atmosphèriques ( LISA ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Université Paris-Est Créteil Val-de-Marne - Paris 12 ( UPEC UP12 ) -Centre National de la Recherche Scientifique ( CNRS ), Massachusetts Institute of Technology ( MIT ), Universidad Nacional Autónoma de México ( UNAM ) -Universidad Nacional Autónoma de México ( UNAM ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge] ( EAPS ), and Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract: International audience; The SAM GC-MS instrument on the Curiosity rover allows to analyze volatile compounds from the atmosphere or volatile compounds from the Martian regolith and refractory compounds in the regolith after sample treatment using wet chemistry. One portion of the wet chemistry experiment is composed of MTBSTFA (N-methyl-N-tert-butyldimethylsilyltrifluoroacetamide) / DMF (dimethylformamide).Abundant chlorinated hydrocarbons have been detected with SAM when analyzing samples collected in several sites explored by Curiosity rover. Some of these chlorohydrocarbons are produced during pyrolysis by the reaction of Martian oxychlorine compounds in the samples with terrestrial carbon from a derivatization agent (MTBSTFA) used in SAM (1, 2). Chlorobenzene cannot be formed by the direct reaction of MTBSTFA and DMF when heated in the presence of fused silica and perchlorates under SAM-like conditions (1)) therefore two other reaction pathways for chlorobenzene were proposed : (1) reactions between the volatile thermal degradation products of perchlorates (e.g. O2, Cl2 and HCl) and Tenax® and (2) the interaction of perchlorates with organic material from the martian regolith such as benzenecarboxylates (3, 4).This study investigates several propositions for chlorinated hydrocarbon formation by looking for: (1) all products coming from the interaction of Tenax® (which is part of the SAM hydrocarbon trap) and perchlorates, (2) also between some soil sample and perchlorates in the presence or absence of MTBSTFA and (c) sources of chlorinated hydrocarbon precursors.References: 1. D. P. Glavin et al.(2013) JGR 118, 1955–1973. 2. L. a Leshin et al. (2013) Science 341, 1238937. 3. C. Freissinet et al. (2014) LPSC XXXXV Abstract 2796. 4. D. Glavin et al. (2014) LPSC XXXV Abstract #1157.
Published: 2014

42. The resolved scaling relations in DustPedia: Zooming in on the local Universe

Author: Viviana Casasola, Simone Bianchi, Laura Magrini, Aleksandr V. Mosenkov, Francesco Salvestrini, Maarten Baes, Francesco Calura, Letizia P. Cassarà, Christopher J. R. Clark, Edvige Corbelli, Jacopo Fritz, Frédéric Galliano, Elisabetta Liuzzo, Suzanne Madden, Angelos Nersesian, Francesca Pozzi, Sambit Roychowdhury, Ivano Baronchelli, Matteo Bonato, Carlotta Gruppioni, Lara Pantoni, Istituto Nazionale di Astrofisica (INAF), INAF - Osservatorio Astrofisico di Arcetri (OAA), The Central Astronomical Observatory of the Russian Academy of Sciences [Pulkovo], Russian Academy of Sciences [Moscow] (RAS), St Petersburg State University (SPbU), Sterrenkundig Observatorium, Universiteit Gent = Ghent University (UGENT), Space Telescope Science Institute (STSci), Instituto de Radioastronomía y Astrofísica (IRyA), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), National Technical University of Athens [Athens] (NTUA), National Observatory of Athens (NOA), Institute for Educational Technology = The Istituto per le Tecnologie Didattiche (ITD), International Centre for Radio Astronomy Research (ICRAR), The University of Western Australia (UWA)-Government of Western Australia-Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC), Department of Biomedical Sciences for Health [Università degli Studi di Milano], Università degli Studi di Milano = University of Milan (UNIMI), INAF-Osservatorio Astronomico di Bologna (OABO), Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), and European Project: 8311959(1984)
Subjects: abundances [ISM], ISM [galaxies], extinction, FOS: Physical sciences, Astronomy and Astrophysics, ISM: atoms, Astrophysics - Astrophysics of Galaxies, ISM: molecules, ISM: abundances, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], ISM: dust, Physics and Astronomy, atoms [ISM], Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), dust, galaxies: evolution, evolution [galaxies], molecules [ISM], galaxies: ISM
Abstract: We perform a homogeneous analysis of an unprecedented set of spatially resolved scaling relations (SRs) between ISM components and other properties in the range of scales 0.3-3.4 kpc. We also study some ratios: dust-to-stellar, dust-to-gas, and dust-to-metal. We use a sample of 18 large, spiral, face-on DustPedia galaxies. All the SRs are moderate/strong correlations except the dust-HI SR that does not exist or is weak for most galaxies. The SRs do not have a universal form but each galaxy is characterized by distinct correlations, affected by local processes and galaxy peculiarities. The SRs hold starting from 0.3 kpc, and if a breaking down scale exists it is < 0.3 kpc. By evaluating all galaxies at 3.4 kpc, differences due to peculiarities of individual galaxies are cancelled out and the corresponding SRs are consistent with those of whole galaxies. By comparing subgalactic and global scales, the most striking result emerges from the SRs involving ISM components: the dust-total gas SR is a good correlation at all scales, while the dust-H2 and dust-HI SRs are good correlations at subkpc/kpc and total scales, respectively. For the other explored SRs, there is a good agreement between small and global scales and this may support the picture where the main physical processes regulating the properties and evolution of galaxies occur locally. Our results are consistent with the hypothesis of self-regulation of the SF process. The analysis of subgalactic ratios shows that they are consistent with those derived for whole galaxies, from low to high z, supporting the idea that also these ratios could be set by local processes. Our results highlight the heterogeneity of galaxy properties and the importance of resolved studies on local galaxies in the context of galaxy evolution. They also provide observational constraints to theoretical models and updated references for high-z studies., 42 pages, 11 figures and 5 tables in the main text, 2 figures and 1 table in Appendix. Accepted for publication in A&A
Published: 2022

43. Prologue: Les fins de l’histoire. Apocalypse et palingenèse dans la pensée historique et l’action politique (Europe-Amérique, XIXe-XXIe siècles)

Author: Díaz Maldonado, Rodrigo, Ledesma Alonso, Ricardo, Centre Aixois d'Etudes Romanes (CAER), Aix Marseille Université (AMU), and Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)
Subjects: [SHS.PHIL]Humanities and Social Sciences/Philosophy, [SHS.HIST]Humanities and Social Sciences/History
Abstract: El presente número de la revista Amnis se enfoca en un problema particular que ha sido ampliamente estudiado en los últimos 70 años : la continuidad o similitud entre nociones provenientes del pensamiento religioso – específicamente cristiano – e ideas o formas del pensamiento secular occidental de los siglos XIX y XX.
Published: 2022

44. Flexible use of contact calls in a species with high fission-fusion dynamics

Author: Briseño-Jaramillo Margarita, Sosa-López José Roberto, Ramos-Fernández Gabriel, Lemasson Alban, Universidad Veracruzana, Instituto Politecnico Nacional [Mexico] (IPN), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Ethologie animale et humaine (EthoS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), and M.B.-J. received a postdoctoral fellowship from CONACYT (scholar no. 220762), and G.R.-F. an Exploration Grant from National Geographic (WW-R008-17) and support from CONACYT CF-2019-263958 and DGAPA-PAPIIT IA200720.
Subjects: Male, vocal flexibility, Atelinae, contact calls, New World monkeys, audience effect, Uncertainty, General Biochemistry, Genetics and Molecular Biology, [SCCO]Cognitive science, Cognition, Animals, Female, Vocalization, Animal, Social Behavior, General Agricultural and Biological Sciences, social uncertainty
Abstract: The ‘social complexity hypothesis' posits that complex social systems (which entail high uncertainty) require complex communicative systems (with high vocal flexibility). In species with fission–fusion dynamics, where the fluid composition of temporary subgroups increases the uncertainty with which group members must manage their social relationships, vocal communication must be particularly flexible. This study assessed whether contact call rates vary with caller and audience characteristics in free-living spider monkeys, as well as with fission and fusion events. Adult females and immature individuals called more when in small audience settings, while audience size did not influence adult males. Adults called more when in the presence of the opposite sex, whereas immatures vocalized more in subgroups composed only by females. Females also called more when with their mature sons. We found higher call rates in periods during which fission and fusion events took place than in periods with more stable compositions and when the composition after a fission or fusion event changed from one sex to two sexes. A flexible use of contact calls allows individuals to identify themselves when they join others, particularly if they are members of the opposite sex. This socio-spatial cohesion function reduces the uncertainty about subgroup composition. This article is part of the theme issue ‘Cognition, communication and social bonds in primates’.
Published: 2022

45. Reconciliation of asynchronous satellite-based NO2 and XCO2 enhancements with mesoscale modeling over two urban landscapes

Author: Ruixue Lei, Sha Feng, Yang Xu, Sophie Tran, Michel Ramonet, Michel Grutter, Agustin Garcia, Mixtli Campos-Pineda, Thomas Lauvaux, Pennsylvania State University (Penn State), Penn State System, Johns Hopkins University (JHU), Pacific Northwest National Laboratory (PNNL), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), ICOS-RAMCES (ICOS-RAMCES), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Groupe de spectrométrie moléculaire et atmosphérique (GSMA), Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS), and ANR-17-CE04-0013,MERCI-CO2,Impacts régional des émissions de CO2 de Mexico(2017)
Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Soil Science, Geology, Computers in Earth Sciences, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment
Abstract: International audience; Fossil fuel carbon dioxide (CO 2ff), the main driver of global warming and climate change, is often co-emitted with nitrogen oxides (NO x) and precursors to ground-level ozone from anthropogenic sources like power plants or vehicles. In urban and suburban areas, satellite-based NO 2 can be used as a proxy to track the emissions of CO 2ff. Because of NO 2 's shorter lifetime, urban NO 2 plumes are more distinguishable from backgrounds and more sensitive to variations in emissions. However, the combination of these two gases is limited by the asynchrony among NO 2 and CO 2 monitoring satellites. We used CO 2ff simulated by the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) model to reconcile the tropospheric NO 2 vertical column density (VCD) from Tropospheric Monitoring Instrument (TROPOMI) and column-averaged dry-air mole fractions of carbon dioxide enhancements (ΔXCO 2) from Orbiting Carbon Observatory 3 (OCO-3) Snapshot Area Maps (SAMs) over a multicity area, Washington D.C.-Baltimore (DC-Balt), and a basin city, Mexico City. NO 2 /CO 2ff ratios over DC-Balt are smaller than Mexico City, indicative of stricter emission restrictions, a more combustionefficient vehicle fleet, and higher combustion efficiency due to lower altitude in DC-Balt. For single-track cases, the spatial correlations between NO 2 and ΔXCO 2 over Mexico City are stronger than DC-Balt because the NO 2 and CO 2 are mostly trapped in the valley of Mexico City, while DC-Balt is severely affected by distant sources (i. e., US East Coast cities). Using multi-track averaging, spatial correlation coefficients increase with the number of days used for averaging. The correlations reached a maximum when averaging >12 continuous images for DC-Balt and >10 continuous images for Mexico City. This finding indicates that multi-track averaging using modeled CO 2ff as a proxy is helpful to filter the noise in single-track images, to cancel the interference from distant sources, and to magnify correlations between NO 2 and CO 2ff. Mexico City showed stronger spatial correlations but weaker temporal correlations than DC-Balt due to biomass burning hot spots and large transport errors caused by the trapping effects of the surrounding mountains. Tracking the 20-day moving average of CO 2ff emissions using TROPOMI NO 2 seems technically feasible, considering the relationship between correlation coefficients and the number of available satellite images.
Published: 2022

46. Testing interval arithmetic libraries, including their IEEE-1788 compliance

Author: Nathalie Revol, Luis Benet, Luca Ferranti, Sergei Zhilin, Arithmétiques des ordinateurs, méthodes formelles, génération de code (ARIC), Laboratoire de l'Informatique du Parallélisme (LIP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-Inria Lyon, Institut National de Recherche en Informatique et en Automatique (Inria), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), University of Vaasa, CSort (CSort), and Roman Wyrzykowski
Subjects: Test cases for interval arithmetic, Unit tests for interval arithmetic libraries, [INFO.INFO-AO]Computer Science [cs]/Computer Arithmetic, FOS: Mathematics, Numerical Analysis (math.NA), Mathematics - Numerical Analysis, [INFO.INFO-NA]Computer Science [cs]/Numerical Analysis [cs.NA], Testing IEEE 1788-2015 compliance
Abstract: International audience; As developers of libraries implementing interval arithmetic, we faced the same difficulties when it came to testing our libraries. What must be tested? How can we devise relevant test cases for unit testing? How can we ensure a high (and possibly 100%) test coverage? In this paper we list the different aspects that, in our opinion, must be tested, giving indications on the choice of test cases. Then we examine how several interval arithmetic libraries actually perform tests. Next, we introduce two frameworks developed specifically to gather test cases and to incorporate easily new libraries in order to test them, namely JInterval and ITF1788. Not every important aspects of our libraries fit in these frameworks and we list extra tests that we deem important, but not easy, to perform.
Published: 2022

47. Bimetallic Ruthenium Nitrosyl Complexes with Enhanced Two‐Photon Absorption Properties for Nitric Oxide Delivery

Author: Yael Juarez‐Martinez, Pablo Labra‐Vázquez, Alejandro Enríquez‐Cabrera, Andrés F. Leon‐Rojas, Diego Martínez‐Bourget, Pascal G. Lacroix, Marine Tassé, Sonia Mallet‐Ladeira, Norberto Farfán, Rosa Santillan, Gabriel Ramos‐Ortiz, Jean‐Pierre Malval, Isabelle Malfant, Laboratoire de chimie de coordination (LCC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Centro de Investigaciones en Optica (CIO), Consejo Nacional de Ciencia y Tecnología [Mexico] (CONACYT), Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), IRP-MCCM French-Mexican International Research Program, LIA-LCMMC International Laboratory / CNRS - CONACyT, Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), and Gulli, Marie-Hélène
Subjects: Photons, Photochemistry, Organic Chemistry, Ruthenium nitrosyl, General Chemistry, [CHIM.COOR] Chemical Sciences/Coordination chemistry, Nitric Oxide, Ligands, Ruthenium, Catalysis, Ligand design, Density functional calculations, Two-photon absorption, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Density Functional Theory
Abstract: International audience; One monometallic and three bimetallic ruthenium nitrosyl (RuNO) complexes are presented and fully characterized in reference to a parent monometallic complex of formula [FTRu(bpy)(NO)]3+, where FT is a fluorenyl-substituted terpyridine ligand, and bpy the 2,2’-bipyridine. These new complexes are built with the new ligands FFT, TFT, TFFT, and TF-CC-TF (where an alkyne C≡C group is inserted between two fluorenes). The crystal structures of the bis-RuNO2 and bis-RuNO complexes built from the TFT ligand are presented. The evolution of the spectroscopic features (intensities and energies) along the series, at one-photon absorption (OPA) correlates well with the TD-DFT computations. A spectacular effect is observed at two-photon absorption (TPA) with a large enhancement of the molecular cross-section (σTPA), in the bimetallic species. In the best case, σTPA is equal to 1523±98 GM at 700 nm, in the therapeutic window of transparency of biological tissues. All compounds are capable of releasing NO⋅ under irradiation, which leads to promising applications in TPA-based drug delivery.
Published: 2022

48. Carbonylative Suzuki Coupling Catalyzed by Pd Complexes Based on [N,P]‐Pyrrole Ligands: Direct Access to 2‐Hydroxybenzophenones

Author: Cortés-Mendoza, Salvador, Adamczyk, Dorian, Badillo-Goméz, Joel, Urrutigoïty, Martine, Ortega-Alfaro, M. Carmen, López-Cortés, José, Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Laboratoire de chimie de coordination (LCC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), UNAM - PAPIIT IN209720, IN212320, and CONACYT - Project 285722
Subjects: Biaryl ketones, Carbonylative Suzuki Coupling, Biphenyls, [CHIM.COOR]Chemical Sciences/Coordination chemistry, [N P]-donor ligands, Palladium
Abstract: International audience; The Suzuki-Miyaura cross-coupling is one of the most useful synthetic tools to build C−C bonds, but the use of hydroxyaryl halides to direct access hydroxy-byaryls still remains a challenge. For the carbonylative version of the reaction, the synthesis of hydroxybiaryl ketones is commonly solved by protecting group strategies. In this work, we report a protocol of carbonylative Suzuki- Miyaura coupling catalysed by a [N,P]-PdCl2 complex using aryl halides, various aryl boronic acids and CO. We were able at first to obtain biphenyls, finding a singular reactivity towards 2-bromophenol, that later was extended to the carbonylation reaction, resulting in methodology that allows the obtention of 2-hydroxybiaryl ketones, with a functional group tolerance toward amines, alkoxy, ketones, esters, and halides.
Published: 2022

49. Gas-Chromatographic analysis of Mars soil samples with the SAM instrument onboard Curiosity - the 180 first sols

Author: Cyril Szopa, Michel Cabane, Patrice Coll, David Coscia, Arnaud Buch, Samuel Teinturier, Rafael Navarro-Gonzalez, Jean-Pierre Goutail, Christophe Montaron, Jean-Baptiste Rigal, Patrick Poinsignon, Vincent Guerrini, Marie-Sophie Clerc, Mustapha Meftah, Soldani, L., Mettetal, F., Jerôme, M., Carole Philippon, Alexandre Galic, Sablairolles, J., Triqueneaux, S., Chazot, D., Toffolo, B., Rakoto, F. Y., Gaboriaud, A., Mahaffy, P., PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), Bureau Veritas Marine & Offshore, C.O.M.A.T Concept Mécanique Assistance Technique, Groupe COMAT, Air Liquide Advanced Technologies [Sassenage] (ALAT), Air Liquide [Siège Social], ATERMES [Montigny-le-Bretonneux], Centre National d'Études Spatiales [Toulouse] (CNES), NASA Goddard Space Flight Center (GSFC), Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), IMPEC - LATMOS, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Bureau Veritas, and ATERMES
Subjects: [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract: International audience; Amongst the SAM suite of instruments [1], SAM-GC (Gas Chromatograph) is devoted to identify and quantify volatiles evolved from the thermal/chemical treatment of any soil sample collected by the Curiosity rover. The first soil samples analyzed with SAM were composed of sand collected at the Rocknest site, when the second site analyzed was a basin called "Yellowkive Bay". For their analysis, these samples were submitted to a pyrolysis at temperatures reaching about 900°C. For SAM-GC and GCMS analyses, different fractions of pyrolysates were collected at different temperature in the ambient-900°C range in order to discriminate potential different volatile fractions present in the solid sample.With the aim to search for potential organic molecules outgassed from the samples, a SAM-GC analytical channel composed of thermal-desorption injector and a MXT-CLP chromatographic column was used as it was designed for the separation of a wide range of volatile organic molecules. This channel is also equipped with a thermal conductivity detector (TCD) capable to detect the most abundant species (with abundances down to approximately 10-10 mol). It is thus complementary to the mass spectrometer detection for quantification of such species as this last instrument has not a linear response in this domain of high abundance, whereas it is significantly more sensitive than the TCD. The results obtained with this instrument first show that the performances of SAM-GC are representative of those obtained during calibrations of the instrument in laboratory, as well as they are repeatable. Hence, the instrument performs nominally, making it the first GCMS running successfully on Mars since the Viking missions. Moreover, the complementarity of GC towards MS is also shown, either by allowing the quantification ofthe major species detected (as water), or by providing a chromatographic signal well resolved temporally which can be used to improve the QMS signal treatment.In the frame of research of organics, the SAM-GC analyses contribute to the identification of several methyl-chlorohydrocarbons, and of HCN in the gases evolved from the solid sample. These detections strongly support the presence of perchlorates in the Rocknest soil. Since perchlorates have been detected with Phoenix lander [2] and then recently with Curiosity, the re-interpretation of the Viking data have to be seen under a new angle [3]. The nondetection of PAHs is also interesting to notice, when it is known that micrometeorites containing PAHs still bring this organic material to the Mars surface today. This lack of detection defines an upper limit on the content of PAHs in the martian soil at the sites studied by Curiosity, but it could also be indicative of the presence of chemical mechanisms that process this type of material at the surface.
Published: 2013

50. Initial Performances/Observations/Results of the SAM Gas Chromatograph (SAM-GC) at Rocknest Site

Author: Michel Cabane, Patrice Coll, Cyril Szopa, David Coscia, Buch, A., Samuel Teinturier, Rafael Navarro-González, Jean-Pierre Goutail, Christophe Montaron, Jean-Baptiste Rigal, Jean-Jacques Correia, Vincent Guerrini, Patrick Poinsignon, Marie-Sophie Clerc, Mustapha Meftah, Soldani, L., Mettetal, F., Jerôme, M., Carole Philippon, Galic, A., Sablairolles, J., Triqueneaux, S., Chazot, D., Toffolo, B., Rakoto, F., Gaboriaud, A., Daniel Glavin, François Raulin, François, P., Poch, O., Sternberg, R., Paul Mahaffy, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés et Matériaux - EA 4038 (LGPM), CentraleSupélec, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratorio de Química de Plasmas y Estudios Planetarios [Mexico], Instituto de Ciencias Nucleares [Mexico], Universidad Nacional Autónoma de México (UNAM)-Universidad Nacional Autónoma de México (UNAM), Ecole Centrale Paris, C.O.M.A.T Concept Mécanique Assistance Technique, Groupe COMAT, Air Liquide Advanced Technologies [Sassenage] (ALAT), Air Liquide [Siège Social], ATERMES [Montigny-le-Bretonneux], Centre National d'Études Spatiales [Toulouse] (CNES), NASA Goddard Space Flight Center (GSFC), Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)-Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), IMPEC - LATMOS, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and ATERMES
Subjects: [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract: International audience; How the French contribution (a gas chromatograph) to the SAM suite of instruments is working at Mars, and how it is addressing the quest for organic matter.
Published: 2013

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