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What are the contributions of maternal and paternal traits to fecundity and offspring development?A case study in an amphibian species,the spined toad Bufo spinosus

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Current Zoology 2023年第5期69卷 527-534页

作者： Matthias Renoirt frédéric Angelier Marion Cheron françois Brischoux Centre d’Etudes Biologiques de Chizé CEBC UMR 7372 CNRS-La Rochelle Université79360 Villiers en BoisFrance

Assessing the determinants of reproductive success is critical but often complicated because of complex interactions between parental traits and environmental conditions occurring during several stages of a reproductive ***,we used a simplified ecological situation-an amphibian species lacking post-oviposition parental care-and a laboratory approach to investigate the relationships between parental(both maternal and paternal)phenotypes(body size and condition)and reproductive success(fecundity,egg size,embryonic and larval duration,larval and metamorphic morphology).We found significant effects of maternal phenotype on fecundity,hatching success,and tadpole size,as well as on the duration of larval ***,and more surprisingly,we also found a potential contribution of the paternal phenotype occurring during early(embryonic development duration)offspring *** our study focused on life-history traits such as body size and development duration,additional mechanisms involving physiological costs of development may well mediate the relationships between parental phenotypes and offspring *** studies are required to decipher the mechanisms underlying our findings in order to clarify the mechanistic basis of the links between parental phenotypes and offspring development.

关键词： clutch quality embryonic development larval development phenotype reproductive success

PM_(2.5)characterization of primary and secondary organic aerosols in two urban-industrial areas in the East Mediterranean

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Journal of Environmental Sciences 2021年第3期33卷 98-116页

作者： Marc Fadel frédéric Ledoux Mariana Farhat Adib Kfoury dominique Courcot Charbel Afif Emissions Measurementsand Modeling of the Atmosphere(EMMA)LaboratoryCARFaculty of SciencesSaint Joseph UniversityBeirutLebanon Unitéde Chimie Environnementale et Interactions sur le Vivant UCEIV UR4492FR CNRS 3417University of Littoral Côte d Opale(ULCO)DunkerqueFrance department of Environmental Sciences University of BalamandAl KourahLebanon Climate and Atmosphere Research Center The Cyprus InstituteNicosiaCyprus

Primary and secondary organic aerosols in PM_(2.5)were investigated over a one-year campaign at Zouk Mikael and Fiaa,*** n-alkanes concentrations were quite similar at both sites(26-29 ng/m^(3))and mainly explained by anthropogenic emissions rather than natural *** concentrations of total Polycyclic Aromatic Hydrocarbons(PAHs)were nearly three times higher at Zouk Mikael(2.56 ng/m^(3))compared to Fiaa(0.95 ng/m^(3)),especially for indeno[1,2,3-c,d]pyrene linked to the presence of the power plant.A characteristic indeno[1,2,3-c,d]pyrene/(indeno[1,2,3-c,d]pyrene+benzo[g,h,i]perylene)ratio in the range0.8-1.0 was determined for heavy fuel oil combustion from the power *** acids and hopanes were also investigated and were assigned to cooking activities and vehicular emissions *** were identified for the first time in Lebanon with high concentrations at Zouk and Fiaa(106.88 and 97.68 ng/m^(3) respectively).Moreover,the biogenic secondary aerosols revealed higher concentrations in *** total terpene concentration varied between 131 ng/m^(3) at Zouk Mikael in winter to 469 ng/m3 at Fiaa in ***,the concentrations of the dicarboxylic acids especially for adipic and phthalic acids were more influenced by anthropogenic *** analysis of molecular markers and diagnostic ratios indicated that the sites were strongly affected by anthropogenic sources such as waste open burning,diesel private generators,cooking activities,road transport,power plant,and industrial ***,results showed different pattern during winter and summer ***,higher concentrations of biogenic markers were clearly encountered during the summer period.

关键词： PM_(2.5) Secondary organic aerosols PAHs Phthalates Lebanon Urban-industrial sites

dental stem cell-conditioned medium for tissue regeneration: Optimization of production and storage

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World Journal of Stem Cells 2022年第4期14卷 287-302页

作者： Batoul Chouaib frédéric Cuisinier Pierre-Yves Collart-dutilleul Laboratory Bioengineering and Nanosciences UR_UM104 University of MontpellierMontpellier 34000France

BACKGROUNd Mesenchymal stem cells(MSC)effects on tissue regeneration are mainly mediated by their secreted substances(secretome),inducing their paracrine *** Conditioned medium(CM),including soluble factors(proteins,nucleic acids,lipids)and extracellular vesicles is emerging as a potential alternative to cell ***,the manufacturing of CM suffers from variable procedures and protocols leading to varying results between ***,there is no welldefined optimized procedure targeting specific applications in regenerative *** To focus on conditioned medium produced from dental MSC(dMSC-CM),we reviewed the current parameters and manufacturing protocols,in order to propose a standardization and optimization of these manufacturing *** We have selected all publications investigating the effects of dental MSC secretome in in vitro and in vivo models of tissue regeneration,in accordance with the PRISMA *** A total of 351 results were *** based on the inclusion criteria described above,118 unique articles were included in the systematic ***-CM production was considered at three stages:before CM recovery(cell sources for CM),during CM production(culture conditions)and after production(CM treatment).CONCLUSION No clear consensus could be recovered as evidence-based methods,but we were able to describe the most commonly used protocols:donors under 30 years of age,dental pulp stem cells and exfoliated deciduous tooth stem cells with cell passage between 1 and 5,at a confluence of 70%to 80%.CM were often collected during 48 h,and stored at-80°*** is important to point out that the preconditioning environment had a significant impact on dMSCCM content and efficiency.

关键词： Tissue engineering Mesenchymal stem cells dental Conditioned medium Secretome Regeneration

Anisotropic thermal expansion in high-entropy multicomponent AlB_(2)-type diboride solid solutions

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International Journal of Extreme Manufacturing 2023年第1期5卷 331-343页

作者： frédéric Monteverde Mattia Gaboardi Federico Saraga Lun Feng William Fahrenholtz Gregory Hilmas National Research Council of Italy Institute of Science Technology and Sustainability for CeramicsFaenza 48018RAItaly Elettra—Sincrotrone Trieste S.C.P.A Strada Statale 14—Km 1635 in AREA Science ParkBasovizza 34149TriesteItaly Missouri University of Science and Technology RollaMO 65409United States of America AUREL Spa I-47015(ModiglianaItaly) BLUE ORIGIN 98302(KentWashington US).

High-entropy(HE)ultra-high temperature ceramics have the chance to pave the way for future applications propelling technology advantages in the fields of energy conversion and extreme environmental *** others,HE diborides stand out owing to their intrinsic anisotropic layered structure and ability to withstand ultra-high ***,we employed in-situ high-resolution synchrotron diffraction over a plethora of multicomponent compositions,with four to seven transition metals,with the intent of understanding the thermal lattice expansion following different composition or synthesis *** a result,we were able to control the average thermal expansion(TE)from 1.3×10^(−6)to 6.9×10^(−6)K^(−1)depending on the combination of metals,with a variation of in-plane to out-of-plane TE ratio ranging from 1.5 to 2.8.

关键词： ultra-high temperature ceramics borides high-entropy ceramics spark plasma sintering synchrotron diffraction anisotropic thermal expansion

Water quality in forest and village ponds in Burkina Faso(western Africa)

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Journal of Forestry Research 2017年第5期28卷 1039-1048页

作者： Bilass Zongo frdric Zongo Aboubacar Toguyeni Joseph I.Boussim Laboratoire de Biologie et Ecologie Vgtales Universit de Ouagadougou Unit de Recherche Aquaculture et Biodiversit Aquatique Laboratoire d'Etude et de Recherche sur les Ressources Naturelles et les Sciences Environnementales Universit Polytechnique de Bobo-Dioulasso

Forest ecosystems help conserve the quality of water resources in aquatic habitats. The conservation of biological diversity in aquatic and terrestrial ecosystems remains a communal concern. Aquatic ecosystems and resources are vulnerable but can be preserved and protected by forests. In sub-Saharan regions of Africa, water from ecosystems such as ponds still play important role in the livelihood of local populations. Water from temporary ponds is used by local populations for multiple needs; however, in this part of the world, the population is increasing, thus increasing human needs and activities and land use in the region. Land-use changes lead to deforestation, land degradation and the decline in freshwater, affecting human health and well-being. Forest degradation leads to the decline in ecosystem goods and services, particularly those related to watersheds. This study conducted in eastern Burkina Faso aimed to assess water quality of temporary ponds in protected forest areas (reserves) and surrounding villages. It was conducted in 61 temporary ponds where physical, chemical and biological variables were measured, such as water surface area, depth, transparency, macrophyte cover, pH, dissolved O2, conductivity, nutrient concentrations and algae biomass. The results showed that at p depth (p = 0.00), nutrient content (p = 0.00), and algae biomass (p = 0.04) were significantly higher outside reserves than inside reserves. In contrast, macrophyte cover (mean cover percentages 53 vs. 44.5%) and water transparency (p = 0.02) were higher inside reserves. The variations in conductivity and pH were not significant. All trends showed the influences of human activities on water characteristics and the role forests and land cover had in preventing negative human impacts and disturbance of temporary ponds. Forests and land cover are important to water quality conservation and algae biomass regulation in temporary ponds. Prot

关键词： Ecosystem services Pond water Reserves Variables Western Africa

Chaotic light at mid-infrared wavelength

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Light(Science & Applications) 2016年第1期5卷 744-751页

作者： Louise Jumpertz Kevin Schires Mathieu Carras Marc Sciamanna frédéric Grillot CNRS LTCI Télécom ParisTechUniversitéParis Saclay75634 Paris Cedex 13France mirSense 86 rue de Parisbat.Erable91400 OrsayFrance LMOPS(Laboratoire Matériaux Optiques Photonique et Systèmes)CentraleSupélecUniversitéParis Saclay57070 MetzFrance LMOPS(Laboratoire Matériaux Optiques Photonique et Systèmes)CentraleSupélecUniversitéde Lorraine57070 MetzFrance Center for High Technology Materials University of New-MexicoAlbuquerque87106-4343 NMUSA

The onset of nonlinear dynamics and chaos is evidenced in a mid-infrared distributed feedback quantum cascade laser both in the temporal and frequency *** opposed to the commonly observed route to chaos in semiconductor lasers,which involves undamping of the laser relaxation oscillations,quantum cascade lasers first exhibit regular self-pulsation at the external cavity frequency before entering into a chaotic low-frequency fluctuation *** bifurcation sequence,similar to that already observed in class A gas lasers under optical feedback,results from the fast carrier relaxation dynamics occurring in quantum cascade lasers,as confirmed by numerical *** chaotic behavior can impact various practical applications including spectroscopy,which requires stable single-mode *** also allows the development of novel mid-infrared highpower chaotic light sources,thus enabling secure free-space high bit-rate optical communications based on chaos synchronization.

关键词： chaos nonlinear dynamics optical feedback quantum cascade laser

Introduction to Mesh Based Generated Lumped Parameter Models for Electromagnetic Problems using Triangular Elements

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CES Transactions on Electrical Machines and Systems 2023年第1期7卷 21-34页

作者： Haidar Y.diab Salim Asfirane Nicolas Bracikowski frédéric Gillon Yacine Amara UniversitéLe Havre Normandie Le Havre76600France département Génie Industriel et Maintenance Nantes UniversitéSt-Nazaire44602France Ecole Centrale de Lille Hauts-de-France59651France IEEE

This paper is an introduction to mesh based generated reluctance network modeling using triangular *** contributions on mesh based generated reluctance networks using rectangular shaped elements have been published,but very few on those generated from a mesh using triangular *** use of triangular elements is aimed at extending the application of the approach to any shape of modeled *** concepts of the approach are presented in the case of electromagnetic *** procedure for coding the approach in the case of a flat linear permanent magnet machine is *** developed under MATLAB environment are also included.

关键词： Lumped parameter modeling Finite element method Mesh Triangular elements Electromagnetic devices Modeling

A power supply module for autonomous portable electronics:ultralow-frequency MEMS electrostatic kinetic energy harvester with a comb structure reducing air damping

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Microsystems & Nanoengineering 2018年第1期4卷 128-140页

作者： Yingxian Lu frédéric Marty dimitri Galayko Jean-Marc Laheurte Philippe Basset UniversitéParis-Est ESYCOM(EA2552)CNAMESIEE Paris and UPEMLVNoisyle-Grand 93162France Sorbonne Université LIP6 labCIAN groupJussieu campusParis 75005France UniversitéParis-Est ESYCOM(EA2552)CNAMESIEE Paris and UPEMLVMarne-la-Vallée 77420France

A MEMS electrostatic kinetic energy harvester(e-KEH)of about 1 cm2,working at ultralow frequency(1–20 Hz),without any supported additional mass on its mobile electrode,and working even without a vacuum environment is *** prototype is especially suitable for environments with abundant low frequency motions such as wearable *** proposed e-KEH consists of a capacitor with a finger-teeth interdigited comb *** greatly reduces the air damping effect,and thus the capacitance variation remains important regardless of the presence of *** the new design,the energy transduced per cycle of excitation is no less than 33 times higher than the classic design within 10–40 Hz/2 g_(peak),while is 85 times higher at 15 Hz/2 g_(peak).An enclosed miniature ball combined with non-linear stoppers enables the oscillation of the movable electrode through impact-based frequency up-conversion mechanism,which is also improved by the low air *** to this new design,a higher efficiency than the classic gap-closing comb structure is obtained,as a larger range of working frequency(1–180 Hz)in air.A maximum energy conversion of 450 nJ/cycle is obtained with a bias voltage of 45 V and an acceleration of 11 Hz,3 g_(peak).Working with a diode AC-dC rectifier,the proposed KEH is able to support up to 3 RFId communications within 16 s while operated at 11 Hz,3 g_(peak).

关键词： autonomous kinetic electrostatic

Iron- and Ferritin-dependent Reactive Oxygen Species distribution： Impact on Arabidopsis Root System Architecture

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Molecular Plant 2015年第3期8卷 439-453页

作者： Guilhem Reyt Soukaina Boudouf Jossia Boucherez frédéric Gaymard Jean-francois Briat Biochimie et Physiologie Moléculaire des Plantes Centre National de la Recherche Scientifique Institut National de la Recherche Agronomique Université Montpellier 2 SupAgro. Bat 7 2 place Viala 34060 Montpellier Cedex 1 France present address: Institute of Biological and Environmental Sciences University of Aberdeen Cruickshank Building St Machar Drive Aberdeen Scotland AB243UU UK

Iron （Fe） homeostasis is integrated with the production of reactive oxygen species （ROS）, and distribution at the root tip participates in the control of root growth. Excess Fe increases ferritin abundance, enabling the storage of Fe, which contributes to protection of plants against Fe-induced oxidative stress. AtFerl and AtFer3 are the two ferritin genes expressed in the meristematic zone, pericycle and endodermis of theAra- bidopsis thaliana root, and it is in these regions that we observe Fe stained dots. This staining disappears in the triple ferl-3-4 ferritin mutant. Fe excess decreases primary root length in the same way in wild-type and in ferl-3-4 mutant. In contrast, the Fe-mediated decrease of lateral root （LR） length and density is enhanced in ferl-3-4 plants due to a defect in LR emergence. We observe that this interaction between excess Fe, ferritin, and root system architecture （RSA） is in part mediated by the H_2O_2/O2·^- balance between the root cell proliferation and differentiation zones regulated by the UPB1 transcription factor. Meristem size is also decreased in response to Fe excess in ferritin mutant plants, implicating cell cycle arrest mediated by the ROS-activated SMR5/SMR7 cyclin-dependent kinase inhibitors pathway in the interaction between Fe and RSA.

关键词： roots development oxidative stress reactive oxygen species balance iron ferritins