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Plasticity of wheat seedling responses to K^(+) deficiency highlighted by integrated phenotyping of roots and root hairs over the whole root system

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Stress Biology 2023年第1期3卷 69-83页

作者： Ikram Madani jean-benoit peltier Martin Boeglin Hervé Sentenac Anne-Aliénor Véry Institut des Sciences des Plantes de Montpellier UMR 5004 CNRS-386 INRAE-Université Montpellier-Institut AgroCampus SupAgro-INRAE Bat 7Place VialaMontpellier 34060 Cedex 2France

The availability in the soil of potassium(K^(+)),a poorly mobile macronutrient required in large quantities for plant growth,is generally suboptimal for crop production in the absence of fertilization,making improvement of the ability of crops to adapt to K^(+)deficiency stress a major *** the uptake capacity of the root system is among the main strategies to achieve this ***,we report an integrative approach to examine the effect of K^(+)deficiency on the development of young plant entire root system,including root hairs which are known to provide a significant contribution to the uptake of poorly mobile nutrients such as K^(+),in two genetically distant wheat varieties.A rhizobox-type methodology was developed to obtain highly-resolved images of root and root hairs,allowing to describe global root and root hair traits over the whole root system via image analysis *** two wheat varieties responded differently to the K^(+)shortage:Escandia,a wheat ancestor,reduced shoot biomass in condition of K^(+)shortage and substantially increased the surface area of its root system,specifically by increasing the total root hair *** Zenati,a landrace,conversely appeared unresponsive to the K^(+)shortage but was shown to constitutively express,independently of the external K^(+)availability,favorable traits to cope with reduced K^(+)availability,among which a high total root hair ***,valuable information on root system adaptation to K^(+)deficiency was provided by global analyses including root hairs,which should also be relevant for other nutrient stresses.

关键词： K^(+)deficiency Root hair Root system Phenotyping Wheat Rhizobox Root plasticity

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Analysis of a System Describing Proliferative-Quiescent Cell Dynamics

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Chinese Annals of Mathematics,Series B 2018年第2期39卷 345-356页

作者： jean CLAIRAMBAULT benoit PERTHAME Andrada Quillas MARAN Dedicated to Philippe G. Ciarlet on the occasion of his 80th birthda

Systems describing the dynamics of proliferative and quiescent cells are commonly used as computational models, for instance for tumor growth and *** on the very earliest stages of hematopoiesis, stem cells and early progenitors, the authors introduce a new method, based on an energy/Lyapunov functional to analyze the long time behavior of solutions. Compared to existing works, the method in this paper has the advantage that it can be extended to more complex situations. The authors treat a system with space variable and diffusion, and then adapt the energy functional to models with three equations.

关键词： Stability analysis Lyapunov functional Energy method Parabolic sys-tems Proliferative and quiescent cells Tumor growth Hematopoiesis

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Influence of initial microstructure and grain size on transformation of bainite to austenite in large size forgings

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Journal of Iron and Steel Research International 2018年第5期25卷 554-562页

作者： Emna Ben Fredj Hadi Ghasemi Nanesa Mohammad Jahazi jean-benoit Morin Department of Mechanical Engineering Ecole deTechnologie Superieure Montreal QC H3C 1K3 Canada Finkl Steel-Sorel St-Joseph-de-Sorel QC J3R 3M8 Canada

The kinetics of austenite formation in the surface and center regions of a 40 t forged ingot of a high-strength medium- carbon low-alloy steel was studied using high-resolution dilatometry. The starting microstructures from the surface or center regions had different proportions of bainite and residual austenite as well as different prior austenite grain sizes. Two heating rates representing the actual heating rates in the surface （5℃ s -1） and center regions （0.5℃ s -1） of large size forged blocks were utilized. Dilatometric curves revealed only one transformation step of austenite formation at both heating rates independent of grain size or proportion of phases. Optical microscopy, field emission gun scanning electron microscopy and X-ray diffraction were used to study microstructure evolution and confirm the results obtained by dilatometry. The kinetic parameters for austenite formation were determined from the dilatometry data by Johnson-Mehl- Avrami-Kolmogorov （JMAK） equation. The JMAK coefficients were determined for each condition of the investigated steels. The calculations indicated that the nucleation and growth of austenite in the surface region were accelerated more than 10,000 times due to a significantly smaller average prior austenite grain size, stability of initial retained austenite, and accumulation of coarse carbides at the surface. The results were discussed in the framework of classical nucleation and growth theories using the kinetic parameters for austenite formation.

关键词： Large size ingot Medium-carbon low-alloy steel Initial microstructure Grain size Austenite formation

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Autoregressive neural networks with exogenous variables for indoor temperature prediction in buildings

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Building Simulation 2021年第1期14卷 165-178页

作者： benoit Delcroix Jérôme Le Ny Michel Bernier Muhammad Azam Bingrui Qu jean-Simon Venne Department of Mechanical Engineering Polytechnique Montréal2500 Chemin de PolytechniqueMontréalQCH3T 1J4Canada Department of Electrical Engineering and GERAD Polytechnique Montréal2500 Chemin de PolytechniqueMontréalQCH3T 1J4Canada Smart Building Lab BrainBox AIMontréalQCCanada

Thermal models of buildings are helpful to forecast their energy use and to enhance the control of their mechanical ***,these models are building-specific and require a tedious,error-prone and time-consuming development effort relying on skilled building energy *** to white-box and gray-box models,data-driven(black-box)models require less development time and a minimal amount of information about the building *** this paper,autoregressive neural network models are compared to gray-box and black-box linear models to simulate indoor *** models are trained,validated and compared to actual experimental data obtained for an existing commercial building in Montreal(QC,Canada)equipped with roof top units for air *** show that neural networks mimic more accurately the thermal behavior of the building when limited information is available,compared to gray-box and black-box linear *** gray-box model does not perform adequately due to its under-parameterized nature,while the linear models cannot capture non-linear phenomena such as radiative heat transfer and ***,the neural network models outperform the alternative models in the presented application,reaching a coefficient of determination R2 up to 0.824 and a root mean square error down to 1.11℃,including the error propagation over time for a 1-week period with a 5-minute *** considering a 50-hour time horizon,the best neural networks reach a much lower root mean square error of around 0.6℃,which is suitable for applications such as model predictive control.

关键词： thermal model building simulation experimental validation multi-layer perceptron linear vs.non-linear black-box vs.gray-box

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Assessment of left-ventricular diastolic function in pediatric intensive-care patients:a review of parameters and indications compared with those for adults

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World Journal of Pediatrics 2021年第1期17卷 21-30页

作者： Morgan Recher Astrid Botte Jerome Soquet jean-benoit Baudelet François Godart Stephane Leteurtre ULR 2694-METRICS:évaluation des Technologies de santéet des Pratiques Médicales Univ.LilleCHU Lille59000 LilleFrance Réanimation et Surveillance Continue Pédiatriques Hopital Jeanne de FlandreCHU de Lille59037 Lille CedexFrance Pediatric and Neonatal Intensive Care Unit CHU Bordeaux33076 BordeauxFrance Cardiac Surgery Unit CHU Lille59000 LilleFrance Congenital and Pediatric Cardiology Unit CHU Lille59000 LilleFrance

Background The incidence of diastolic heart failure has increased over *** evaluation of left-ventricular diastolic func-tion is complex,ongoing,and remains poorly performed in pediatric intensive-care *** study aimed to review the literature and to provide an update on the evaluation of left-ventricular diastolic function in adults and children in intensive *** sources We searched data from PubMed/***-two studies were *** pragmatic questions were identified:(1)What is the physiopathology of diastolic dysfunction?(2)Which tools are required to evaluate diastolic func-tion?(3)What are the echocardiographic criteria needed to evaluate diastolic function?(4)When should diastolic function be evaluated in pediatric intensive care?Results Early diastole allows characterization of relaxation,whereas compliance assessments and filling pressures are evalu-ated during late *** evolution of diastolic function differs between adults and *** in adults,decreased compliance occurs at the same time as delayed relaxation in *** function can be evaluated by Doppler *** echocardiographic criteria for ventricular relaxation include the E wave,E/A wave ratio,and isovolumic relaxation *** compliance can be assessed by the E/e'wave ratio,atrial volume,and Ap wave duration during pulmonary vein *** adult intensive-care patients,the E/e'ratio can be used as an index of tolerance for volume expan-sion in septic patients and to adjust the inotropic *** Clinical studies would allow some of these parameters to be validated for use in children in intensive care.

关键词： Diastole Echocardiography Heart failure Intensive-care unit Pediatric

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Small bowel entrapment and ureteropelvic junction disruption associated with L3 Chance fracture-dislocation

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World Journal of Clinical Cases 2016年第9期4卷 264-268页

作者： Sebastien Pesenti Benjamin Blondel Alice Faure Emilie peltier Franck Launay jean-Luc Jouve Pediatric Orthopaedics Hopital d'Enfants de la TimoneAix Marseille University Spine Unit Aix Marseille University Pediatric Surgery H?pital NordAix-Marseille University

Paediatric Chance fracture are rare lesions but often associated with abdominal injuries. We herein present the case of a seven years old patient who sustained an entrapment of small bowel and an ureteropelvic disruption associated with a Chance fracture and spine dislocation following a traffic accident. Initial X-rays and computed tomographic(CT) scan showed a Chance fracture with dislocation of L3 vertebra, with an incarceration of a small bowel loop in the spinal canal and a complete section of the left lumbar ureter. Paraplegia was noticed on the initial neurological examination. A posterior L2-L4 osteosynthesis was performed firstly. In a second time she underwent a sus umbilical laparotomy to release the incarcerated jejunum loop in the spinal canal. An end-toend anastomosis was performed on a JJ probe to suture the left injured ureter. One month after the traumatism, she started to complain of severe headaches related to a leakage of cerebrospinalis fluid. Three months after the traumatism there was a clear regression of the leakage. One year after the trauma, an anterior intervertebral fusion was done. At final follow-up, no neurologic recovery was noticed. In case of Chance fracture, all physicians should think about abdominal injuries even if the patient is asymptomatic. Initial abdominal CT scan and magnetic resonance imaging provide in such case crucial info for management of the spine and the associated lesions.

关键词： Chance fracture Uretero-pelvic disruption Small bowel injuries Seatbelt Dural tear

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Evaluation of left atrial remodelling following percutaneous left atrial appendage closure

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Journal of Geriatric Cardiology 2017年第8期14卷 496-500页

作者： Zakaria Jalal Xavier Iriart Marie-Lou Dinet Olivier Comeloup Xavier Pillois Hubert Cochet jean-benoit Thambo Department of Paediatric and Adult Congenital Cardiology Bordeaux University Hospital Pessac France Electrophysiology and Heart Modeling Institute IHU Lirye Fondation Bordeaux UniversitO Pessac-Bordeaux France Centre de recherche Cardio-Thoracique de Bordeaux INSERM Bordeaux France Department of Radiology Bordeaux University Hospital Pessac France

Atrial fibrillation prevalence is increasing with age, reaching up to 5% of patients older than 65 years, and is associated with 20%-30% of stroke episodes in that population.

关键词： Atrial fibrillation Left atrial appendage Left atrial remodeling Percutaneous closure

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Accounting for anisotropic effects in the prediction of the hydro-mechanical response of a ventilated tunnel in an argillaceous rock

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Journal of Rock Mechanics and Geotechnical Engineering 2013年第2期5卷 97-109页

作者： Alain Millard Alex Bond Shigeo Nakama Chengyuan Zhang jean-Dominique Barnichon benoit Garitte Commissariatà l'Energie Atomique et aux Energies Alternatives Gif-sur-Yvette France Quintessa Ltd. Chadwick House Birchwood Park Warrington Cheshire WA3 6AE UK Japan Atomic Energy Agency Tokai Japan Insititute of Rock and Soil Mechanics Chinese Academy of Sciences Institute for Nuclear Radioprotection and Safety Fontenay-aux-roses France Universidad Politécnica de Catalunya Barcelona Spain

In order to investigate the hydro-mechanical （HM） and chemical perturbations induced in an argillaceous formation by forced ventilation during the operational period of a nuclear waste repository, a specific experiment has been performed in a tunnel, at Mont Terri Underground Research Laboratory （URL） in Switzerland. This experiment has been selected in the international project DECOVALEX for model vali- dation and the numerical simulation of this ventilation experiment （VE） is the object of the present paper. Since the argillaceous rock exhibits anisotropic properties, particular attention is given to the evaluation of the effects of various anisotropic features on the predicted results. In situ measurements such as relative humidity （RH）, global water mass extracted, pore water pressure, water content, and relative displace- ments are compared to predictions using both isotropic and anisotropic parameters. Water permeability anisotropy is shown to be the most influencing parameter by far, whereas in situ stress anisotropy has an effect only during the excavation phase. The anisotropy for mechanical parameterization has also some influence, in particular through HM couplings. These HM couplings have the potential to be very significant in terms of providing confidence in describing the experimental observation, and should be considered for further investigation.

关键词： Hydro-mechanical (HM) coupling Numerical modelling Anisotropy Mont Terri Underground Research Laboratory (URL) Ventilation experiment (VE) Argillite

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Matrix Assisted Laser Desorption Ionization Time of Flight(MALDI-TOF)-Mass Spectrometry and^(13)C-NMR-Identified New Compounds in Paraberlinia bifoliolata(Ekop-Beli)Bark Tannins

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Journal of Renewable Materials 2024年第3期12卷 553-568页

作者： Liliane Nga benoit Ndiwe Achille Bernard Biwolé Antonio Pizzi jean Jalin Eyinga Biwole Joseph Zobo Mfomo Laboratory of Forest Resources and Wood Valorization Training Unit in Engineering SciencesPost Graduate School of Fundamental and Applied SciencesUniversity of DoualaP.O.Box 1872DoualaCameroun Laboratory of Mechanics Training Unit in Engineering SciencesPost Graduate School of Fundamental and Applied SciencesUniversity of DoualaP.O.Box 2701DoualaCameroun Laboratory of Studies and Research on Wood Material(LERMAB) University of LorraineNancyFrance

Extracts of plant origin,particularly tannins,are attracting growing interest for the sustainable development of materials in the industrial *** discovery of new tannins is therefore *** aim of this work was to contribute to the understanding of the properties of Paraberlinia bifoliolata tannin by Matrix Assisted Laser Desorption Ionization Time of Flight Mass Spectroscopy MALDI-TOF/MS and Carbon 13 Nuclear Magnetic Resonance(13C NMR).The chemical composition of tannin extracted from Paraberlinia bifoliolata bark was determined,as was the mechanical strength of the resin hardened with Acacia nilotica *** by successive water extraction was 35%.MALDI-TOF/MS analysis revealed the presence of three new compounds in this tannin,previously unknown in this family of *** are 3-hydroxyproline acid,N-methyl-4-hydroxypipecolic acid and N-methyl-5-dihydroxypipecolic *** identification of the above molecules means that this tannin can be used for industrial applications,as a resin in the manufacture of particleboard and in the formulation of green corrosion *** information is reinforced by 13C NMR spectrometry,which indicates the presence of several polyflavonoid units,confirming the condensed nature of the *** analysis of the resin formed by the purified tannin of Paraberlinia bifoliolata to which a vegetal biohardener has been added provided a Modulus of Elasticity(MOE)value of 4840 MPa at 150℃,confirming its possible use as a binder resin in the manufacture of wood panels as well as for the formulation of a corrosion inhibitor.

关键词： Tannin Paraberlinia bifoliolata Central African wood species MALDI-TOF/MS 13C NMR bark extracts thermomechanical behaviour wood-binder

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Psychological distress during the COVID-19 pandemic in France:a national assessment of at-risk populations

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General Psychiatry 2020年第6期33卷 400-405页

作者： Benjamin Chaix Guillaume Delamon Arthur Guillemasse benoit Brouard jean-Emmanuel Bibault ENT Department Hopital Gui de ChauliacMontpellierFrance University Montpellier 1 MontpellierFrance Hopital Pite-Salpetriere WefightBrain&Spine InstituteParisFrance Department of Radiation Oncology Hopital Europeen Georges Pompidou CancerologieParisFrance

Background Lockdowns were implemented to limit the spread of *** distress(PD)and post-traumatic stress disorder have been reported after traumatic events,but the specific effect of the pandemic is not well *** The aim of this study was to assess PD in France,a country where C0VID-19 had such a dramatic impact that it required a country-wide *** We recruited patients in four groups of chatbot users followed for breast cancer,asthma,depression and *** used the Psychological Distress Inventory(PDI),a validated scale to measure PD during traumatic events,and correlated PD risk with patients*characteristics in order to better identify the ones who were the most at *** The study included 1771 participants.91.25%(n=1616)were female with a mean age of 32.8(13.71)years and 7.96%(n=141)were male with a mean age of 28.0(8.14)*** total,38.06%(n=674)of the respondents had psychological distress(PDI>14).An analysis of variance showed that unemployment and depression were significantly associated with a higher PDI *** using their smartphones or computers for more than 1 hour a day also had a higher PDI score(p=0.026).Conclusion Prevalence of PD in at-risk patients is *** patients are also at an increased risk of developing post-traumatic stress *** steps should be implemented to monitor and prevent PD through dedicated mental health policies if we want to limit the public health impact of COVID-19 in time.

关键词： distress steps limit

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