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Is non-host pollen suitable for generalist bumblebees？

Insect Science 2018年第2期25卷 259-272页

作者： Maryse Vanderplanck Sylvain Decleves Nathalie Roger Corentin Decroo Guillaume Caulier Gaetan Glauser Pascal Gerbaux Georges Lognay Aurore Richel Nathalie Escaravage Denis Michez Laboratory of Zoology Research Institute for Biosciences University of Mons--UMONS Mons Organic Synthesis and Mass Spectrom- etry Laboratory Interdisciplinary Center for Mass Spectrometry University of Mons--UMONS Mons Research Institute for Biosciences Biology of Marine Organisms and Biomimetics University of Mons--UMONS Mons Belgium Neuch＆tel Platform of Analytical Chem- istry University of Neuch＆tel Neuchtel Switzerland Laboratory of Analytical Chemistry University of Liege Gembloux Agro-Bio Tech Gembloux Unit of Biological and Industrial Chemistry （CBI） University of Liege Gembloux Agro-Bio Tech Gembloux Belgium laboratoire Evolution et Diversity Biologique （EDB） CNRS ENFA UMR 5174 University Toulouse 3 Paul Sabatier Toulouse France

Current evidence suggests that pollen is both chemically and structurally protected. Despite increasing interest in studying bee-flower networks, the constraints for bee development related to pollen nutritional content, toxicity and digestibility as well as their role in the shaping of bee-flower interactions have been poorly studied. In this study we combined bioassays of the generalist bee Bombus terrestris on pollen of Cirsium, Trifolium, Salix, and Cistus genera with an assessment of nutritional content, toxicity, and digestibility of pollen. Microcolonies showed significant differences in their development, non-host pollen of Cirsium being the most unfavorable. This pollen was characterized by the presence of quite rare 37-sterols and a low digestibility. Cirsium consumption seemed increase syrup collection, which is probably related to a detoxification mixing behavior. These results strongly suggest that pollen traits may act as drivers of plant selection by bees and partly explain why Asteraceae pollen is rare in bee generalist diet.

关键词： bee-flower interactions generalist bees pollen defences

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Paleoseismological Evidence of Large Pre-historical Earthquakes on the Western Haiyuan Fault Near Tianzhu, Gansu Province

Paleoseismological Evidence of Large Pre-historical Earthqua...

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第四届青藏高原国际学术研讨会

作者： Yann Klinger CécileLasserre d paul Tapponnier laboratoire de Tectonique Institut de Physique du Globe4 place Jussieu 75005 ParisFrance laboratoire laboratoire de Tectonique Institut de Physique du Globe4 place Jussieu 75005 ParisFrance

＜正＞The Haiyuan fault is a major active left-lateral fault that bounds the Tibetan Plateau to the northeast. Two great earthquakes have ruptured the fault system in the past century: in 1920 （M=8.7） along the eastern Haiyuan fault and in 1927 （M=8-8.3） on a thrust fault system north of the western Haiyuan fault. Studying this active fault has profound implications on the framework of deformation of the TibetanPlateau, and on the mechanics of continental deformation in general. Previous studies have mainly focused on the slip rate of the fault, which remains debated. Paleoseismological investigations on the fault are sparse and mainly in the reach of the 1920 earthquake rupture, or along the eastern half of the Haiyuan fault. The seismic history of the 260-km-long western Haiyuan fault is largely unknown. Despite clear evidence in the field of Holocene activity, this segment of the fault bears no trace of a large earthquake in the past several centuries. It has therefore been reported as a major seismic gap （the ’Tianzhu gap’） with high potential seismic hazard.

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Analytical Calculation of the Energy in a Permanent Magnet

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Journal of Modern Physics 2016年第16期7卷 2281-2287页

作者： Jean-paul Yonnet Christian Chillet Hicham Allag Lotfi Chouikhi laboratoire de Génie Electrique de Grenoble G2E Lab Université Grenoble Alpes Grenoble France laboratoire de Génie Electrique de Grenoble G2E Lab CNRS Grenoble France laboratoire d’Electronique et d’Electrotechnique Industrielle Jijel University Jijel Algeria

The energy in permanent magnet is not a trivial problem because it exist two types of energy: the field energy and the demagnetizing energy. For parallelepiped shape, the magnet energy has been calculated by fully analytical expressions in 3D. The result has been obtained after four successive integrations of Arctangent and Logarithm functions. The analytically calculated energy corresponds to the demagnetization energy in the magnet. The analytical results have been compared with different terms of energy obtained by computation.

关键词： Analytical Calculation Energy Permanent Magnet

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High Current Pulsed Electron Beam(LEHCPEB) Treatment:an Effective Way for Improving Surface Microstructure and Properties

High Current Pulsed Electron Beam(LEHCPEB) Treatment:an Effe...

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2010年全国荷电粒子源、粒子束学术会议、中国电工技术学会第十三届全国电子束离子束学术年会暨电子束离子束专业委员会换届大会、中国电子学会焊接专业委员会第十届全国电子束焊接学术交流会、粒子加速器学会第十二届全国离子源学术交流会、中国机械工程学会焊接分会高能束及特种焊接2010年学术交流会、北京电机工程学会第十一届粒子加速器学术交流会

作者： T.Grosdidier laboratoire d'Etude des Textures et Applications aux Materiaux(LETAM CNRS 3143 Universite Paul Verlaine-MetzIle du Saulcy Key Lab of Materials Modification by Laser Ion and Electron Beams & School of Materials Science and EngineeringDalian University of Technology

Low energy high current pulsed electron beam(LEHCPEB) is a fairly new technique for surface modifications,including hardening,alloying and formation of metastable phases as well as improvement in wear and corrosion *** present contribution gives some new insights on the microstructure modifications encountered at the top surface of HCPEB treated *** particular,the potential of the technique for structure modifications associated with the use of the pulsed electron beam under "heating" and"melting"conditions are highlighted.

关键词： Low energy high current pulsed electron beam(LEHCPEB) Melting and heating modes Craters Deformed structures Surface alloying Surface hardening.

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A Review of Transparent and Artificial Boundary Conditions Techniques for Linear and Nonlinear Schrodinger Equations

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Communications in Computational Physics 2008年第9期4卷 729-796页

作者： Xavier Antoine Anton Arnold Christophe Besse Matthias Ehrhardt Achim Schadle Institut Elie Cartan Nancy(IECN) Universite Henri Poincare Nancy 1UMR 7502INRIA CoridaNancy-UniversiteFrance. Institut fur Analysis und Scientific Computing Technische Universitat WienWiedner Hauptstr.81040 WienAustria. Project-Team SIMPAF INRIA Lille Nord Europe Research Centre Laboratoire Paul Painleve U.M.R CNRS 8524 Universite des Sciences et Technologies de LilleFrance. Weierstrass Institute for Applied Analysis and Stochastics Mohrenstr.3910117 BerlinGermany. Zuse-Institut Berlin Takustrasse 714195 BerlinGermany.

In this review article we discuss different techniques to solve numerically the time-dependent Schrodinger equation on unbounded *** present in detail the most recent approaches and describe briefly alternative ideas pointing out the relations between these *** conclude with several numerical examples from different application areas to compare the presented *** mainly focus on the one-dimensional problem but also touch upon the situation in two space dimensions and the cubic nonlinear case.

关键词： Schrodinger equation transparent boundary conditions discrete convolution unbounded domain finite difference schemes finite elements

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THE RANDOM BATCH METHOD FOR N-BODY QUANTUM DYNAMICS

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Journal of Computational Mathematics 2021年第6期39卷 897-922页

作者： Francois Golse Shi Jin Thierry paul Ecole polytechnique CMLS91128 Palaiseau CedexFrance School of Mathematical Sciences Institute of Natural SciencesMOE-LSCShanghai Jiao Tong UniversityShanghai 200240China Sorbonne Universite CNRSUniversite de ParisINRIALaboratoire Jacques-Louis Lions75005 ParisFrance

This paper discusses a numerical method for computing the evolution of large interacting system of quantum *** idea of the random batch method is to replace the total interaction of each particle with the N−1 other particles by the interaction with p≪N particles chosen at random at each time step,multiplied by(N−1)/*** reduces the computational cost of computing the interaction potential per time step from O(N^(2))to O(N).For simplicity,we consider only in this work the case p=1—in other words,we assume that N is even,and that at each time step,the N particles are organized in N/2 pairs,with a random reshuffling of the pairs at the beginning of each time *** obtain a convergence estimate for the Wigner transform of the single-particle reduced density matrix of the particle system at time t that is both uniform in N>1 and independent of the Planck constant h̵.The key idea is to use a new type of distance on the set of quantum states that is reminiscent of the Wasserstein distance of exponent 1(or Monge-Kantorovich-Rubinstein distance)on the set of Borel probability measures on Rd used in the context of optimal transport.

关键词： Time-dependent Schrodinger equations Random batch method Mean-field limit Wasserstein distance

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花岗岩中的次岩浆显微裂隙

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地质科学译丛 1992年第3期9卷 4-8页

作者： J.L.Bouchez 王奖臻 laboratoire de Pétrophysique et Tectonique Université Paul-Sabatier and Centre National de la Recherche Scientifique Rue des 36-Ponts 31400 Toulouse France

比利牛斯深成花岗岩中的显微构造表明,斜长石晶体在有熔体存在的情况下就发生了破裂作用.这一现象主要由充填裂隙的石英和/或长石显示出来.电子探针分析证明:填隙长石除成分与环带状斜长石的边缘成分一致外,还随熔体分馏作用减少而更具... 详细信息

比利牛斯深成花岗岩中的显微构造表明,斜长石晶体在有熔体存在的情况下就发生了破裂作用.这一现象主要由充填裂隙的石英和/或长石显示出来.电子探针分析证明:填隙长石除成分与环带状斜长石的边缘成分一致外,还随熔体分馏作用减少而更具酸性,裂隙是花岗岩处于次岩浆状态(即岩浆中的熔体量小于岩浆流动所需要的临界值)时,由相互接触的颗粒之间的应力集中所造成.从岩石学角度来说,物质成分的共结性最差,就最易发育次岩浆裂隙,这是因为在冷却期间少量的熔体可以在很大的温度范围内存在.显微裂隙与流面斜交的强烈趋向,可能成为岩浆剪切方向的新判据.

关键词：花岗岩岩浆裂隙显微构造

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Geochemistry of Magmatic Rocks of the Syama Belt, Southern Mali, West African Craton

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Open Journal of Geology 2022年第3期12卷 250-272页

作者： Dasso Yollande Traoré Seko Sanogo Adama Youssouf Koné Ismaïla N’Diaye Mamadou Lamine Bouaré Didier Béziat laboratoire de Cartographie DER de Géologie Faculté des Sciences et Techniques (FST) Université des Sciences des Techniques et des Technologies de Bamako (USTTB) Bamako Mali laboratoire de Minéralogie et de Pétrologie DER de Géologie Faculté des Sciences et Techniques Université des Sciences des Techniques et des Technologies de Bamako Bamako Mali Ecole Nationale d’Ingénieurs Abdramane Baba Touré (ENI-ABT) Bamako Mali Université paul Sabatier de Toulouse Toulouse France

Within southern Mali, the Syama belt constitutes a linear major structure-oriented N-S, which host several gold deposits (e.g., Syama and Tabakoroni) and prospect areas (e.g. Tellem). The Syama Belt is formed by magmatic rocks (basalts, lamprophyres, andesites, dacites and microgranites);sedimentary rocks (shales) and volcano-sedimentary rocks (pyroclastics). The magmatic rocks are divided into two main volcanic series: tholeiitic affinity rocks (basalts and lamprophyres) and calc-alkaline affinity (andesites) that are the most evolved. The field relationships between rocks of these two series suggest that the calc-alkaline series are younger the tholeiitic series. These tholeiitic series present the Mid-Ocean Ridge Basalt (MORB) affinity whereas the calc-alkaline series would be linked to an island arc-type. This coexistence is not an isolated case within the West African Craton (WAC). Otherwise, the Syama belt has all the characteristics of other belts, within which a number of gold deposits are developed, in the WAC.

关键词： Syama Belt Magmatic Rocks MORB Boualé-Mossi Domain Southern Mali West African Craton (WAC)

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Desorption of Methylene Blue Adsorbed on Activated Carbon from Cocoa Pod Shell

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Open Journal of Applied Sciences 2023年第5期13卷 605-617页

作者： David Léonce Kouadio Yapo Aristide Hermann Yapi Djedjess Essoh Jules César Meledje Kacou Alain Paterne Dalogo Djamatché paul Valery Akesse Brou Dibi Karim Sory Traore laboratoire des Sciences et Technologie de l’Environnementale Université Jean Lorougnon Guede C&#244te d’Ivoire laboratoire des Sciences Physiques Fondamentales et appliquées école Normale Supérieure (Abidjan) Abidjan C&#244te d’Ivoire laboratoire des Sciences de l’Environnement Université Nangui Abrogoua C&#244te d’Ivoire

Environmental protection has become a concern for the world. For this reason, the objective of this work is to remove methylene blue adsorbed on activated carbon. The coal used comes from cocoa pod shells. Before pyrolysis, the shells were ground, sieved and impregnated with orthophosphoric acid. Before desorption, the activated carbons were initially saturated with MB. These saturated coals were brought into contact with a sodium chloride (NaCl) solution and then stirred. The evolution of the resorbed MB concentration was monitored by spectrophotometry. The desorption tests showed a remarkable elimination from the first 10 minutes. The desorption kinetics comprises two phases: a rapid kinetics between 0 and 30 minutes and a slow kinetics between 30 and 60 minutes. The desorption of the dye reaches a concentration aqual to 0.84 mg/l at pH = 4 at temperature = 80°C. For modeling, the coefficient of the Langmuir II model is greater than or equal to O.9893. The model of Langmuir III is less than or equal to 0.9373. The Freundlich model coefficient is 0.9842 or less. The desorption is thefore carried out on energy-homogeneous adsorption sites and without any interaction between the adsorbed cations of the dye. Experimental parameters such as pH, temperature and concentration of sodium chloride (NaCl) solution influence the desorption of MB. And the model of Langmuir II describes well the process of desorption of the MB.

关键词： Desorption Activated Carbon Methylene Blue Isotherm Sodium Chloride

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Nucleation and Growth of Thallium on Thin Film Mercury Electrode: Voltammetric, Scanning Electron Microscopy, Chronoamperometric and Electrochemical Impedance Studies

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American Journal of Analytical Chemistry 2022年第11期13卷 415-430页

作者： Abdoulkadri Ayouba Mahamane Boubié Guel paul-Louis Fabre laboratoire Matériaux Eaux Environnement (LAMEE) Faculté des Sciences et Techniques Université Abdou Moumouni Niamey Niger laboratoire de Chimie Moléculaire et des Matériaux Equipe Chimie Physique et Electrochimie Département de Chimie UniversitéJoseph KI ZERBO Ouagadougou Burkina Faso Unité Mixte de Recherche (UMR CNRS 5503) Laboratoire de Génie Chimique Toulouse France

Thallium is a heavy metal highly toxic to the biosphere. It can be determined by anodic stripping voltammetry after deposition on mercury film. The aim of this work is to study the conditions and mechanisms of deposition of Hg on glassy carbon electrode and Tl on Hg film by cyclic voltammetry, scanning electron microscopy, chronoamperometry and impedance techniques. The results showed a germination and growth of a 3D Hg phase on glassy carbon electrode. Similarly, the electrodeposition of Tl on Hg follows a 3D three-dimensional nucleation with diffusion controlled growth. The impedance measurements reveal an easier charge transfer on the Tl film.

关键词： Thallium Mercury Film Cyclic Voltammetry Scanning Electron Microscopy Impedance Measurements

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