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Magnesium Uptake and Palygorskite Transformation Abilities of Wheat and Oat

Pedosphere 2012年第6期22卷 834-841页

作者： M.h.SAlEhI l.TAhAMTANI Department of Soil Science College of AgricultureShahrekord UniversityShahrekord(Iran)

Weathering of clay minerals is a source of nutrients to plants. Palygorskite is a Mg-rich fibrous clay mineral that commonly occurs in the soils and sediments of arid regions. Although many studies have examined the environmental conditions required for the formation and stability of palygorskite, information on the transformation of this mineral in the root zone （or rhizosphere） of agricultural crops is limited. This study explored the possibility of palygorskite transformation in the rhizosphere of wheat and oat and compared the ability of these crops to extract structural Mg from palygorskite. The crops were cultivated in pots consisting of a mixture of sand from hamadan region, Iran and Florida palygorskite, irrigated with distilled water, and treated with either complete or Mg-free nutrient solutions. After 100 d, Mg uptake by the crops was measured. Clay-sized particles in each pot were also separated from the sand and were analyzed through X-ray diffraction （XRD）. The X-ray pattern of the particles was compared with that of the pure palygorskite particles （before cultivation）. The results showed that palygorskite could provide sufficient Mg for the growth of wheat in the pots supplied with Mg-free nutrient solution. In spite of the magnesium uptake by both plants from the palygorskite structure, no detectable peaks indicating the transformation of pMygorskite were recognized by XRD. A decrease of 1.05 nm in peak intensity was more obvious for the pots containing palygorskite and irrigated with Mg-free nutrient solution than for the pots irrigated with complete nutrient solution. Although the decrease in peak intensity was greater for oat than wheat, indicating greater palygorskite weathering by oat, Mg uptake by oat was low, as evidenced by the deficiency symptoms observed.

关键词： clay minerals nutrient solution rhizosphere weathering X-ray diffraction

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Disaster Risk Resilience:Conceptual Evolution,Key Issues,and Opportunities

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International Journal of Disaster Risk Science 2022年第3期13卷 330-341页

作者： Marie-hélène Graveline Daniel Germain Institut des Sciences de l’Environnement(ISE) Universitédu QuébecàMontréalMontréalH3C 3P8Canada Department of Geography Universitédu QuébecàMontréalMontréalH3C 3P8Canada

Resilience has become a cornerstone for risk management and disaster ***,it has evolved extensively both etymologically and conceptually in time and across scientific *** concept has been(re)shaped by the evolution of research and practice *** the opposite of vulnerability for a long time,resilience was first defined as the ability to resist,bounce back,cope with,and recover quickly from the impacts of *** avoid the possible return to conditions of vulnerability and exposure to hazards,the notions of post-disaster development,transformation,and adaptation(build back better)and anticipation,innovation,and proactivity(bounce forward)were then ***,resilience is characterized by a multitude of components and several *** present a selection of 25 components used to define resilience,and an interesting linkage emerges between these components and the dimensions of risk management(prevention,preparedness,response,and recovery),offering a perspective to strengthen resilience through the development of *** its potential,resilience is subject to challenges regarding its operationalization,effectiveness,measurement,credibility,equity,and even its ***,it offers applicability and opportunities for local communities as well as an interdisciplinary look at global challenges.

关键词： Community Disaster risk Resilience Sustainable development

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Binary Co–Ni oxide nanoparticle-loaded hierarchical graphitic porous carbon for high-performance supercapacitors

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Journal of Materials Science & Technology 2020年第2期37卷 135-142页

作者： Yin liu Cuili Xiang hailiang Chu Shujun Qiu Jennifer mcleod Zhe She Fen Xu lixian Sun Yongjin Zou Guangxi Key laboratory of Information Materials Guilin University of Electronic TechnologyGuilin541004China Department of Chemistry Queen’s UniversityK7L 3N6Canada

heteroatom doped graphitic porous carbon is highly desirable for electrochemical applications because of its excellent conductivity and high surface *** this study,highly uniform Co-Ni oxide nanoparticleloaded B,N-doped hierarchical graphitic porous carbon was prepared through a dual pyrolysis *** dispersed chitosan hydrogel was first used as a precursor to fabricate the porous carbon(GCS–C)at 700℃.Co and Ni oxide nanoparticles were further anchored on the porous carbon through chemical reduction and calcined at high *** structure of the porous carbon was optimized by the introduction of graphene to the chitosan *** graphitic degree of the porous carbon was significantly improved by the Co and Ni *** heteroatom B and N were found to be well doped in the *** features enable the composite to be an excellent candidate for supercapacitor *** composite demonstrates a high capacitance(1266.7 F g-1 at 1 A g-1)and excellent stability.

关键词： Graphitic carbon Graphene Metal oxides Supercapacitor Porous carbon

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Emerging role of A-kinase anchoring protein 5 signaling in reward circuit function

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Neural Regeneration Research 2025年第10期20卷 2913-2914页

作者： William J.Flerlage Mark l.Dell’Acqua Brian M.Cox Fereshteh S.Nugent Uniformed Services University of the health Sciences Department of Pharmacology and Molecular TherapeuticsBethesdaMDUSA Department of Pharmacology University of Colorado School of MedicineAnschutz Medical CampusAuroraCOUSA

There is a strong evidence supporting the hypothesis of synaptic dysfunction as a major contributor to neural circuit and network disruption underlying emotional and mood dysregulation in psychiatric disorders(Simmons et al.,2024).Diverse sets of distinct molecular signaling pathways converge on the synapse to regulate synaptogenesis,synaptic function,and synaptic plasticity in brain regions and circuits through complex interactions organized by numerous multivalent protein scaffolds,including the family of proteins known as A-kinase anchoring proteins(AKAPs).

关键词： function supporting

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Nonplanar flow-induced vibrations of a cantilevered PIP structure system concurrently subjected to internal and cross flows

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Acta Mechanica Sinica 2019年第6期35卷 1241-1256页

作者： Z.Y.liu T.l.Jiang l.Wang h.l.Dai Department of Mechanics Huazhong University of Science and TechnologyWuhan 430074China hubei Key laboratory for Engineering Structural Analysis and Safety Assessment Wuhan 430074China

Pipe-in-pipe(PIP)structures are widely used in offshore oil and gas pipelines to settle thermal insulation issues.A PIP structure system usually consists of two concentric pipes and one softer layer for thermal insulation *** total response of the system is related to the dynamics of both pipes and the interactions between these two concentric *** the current work,a theoretical model for flow-induced vibrations of a PIP structure system is proposed and analyzed in the presence of an internal axial flow and an external cross *** interactions between the two pipes are modeled by a linear distributed damper,a linear distributed spring and a nonlinear distributed spring along the pipe *** unsteady hydrodynamic forces due to cross flow are modeled by two distributed van der Pol wake *** nonlinear partial differential equations for the two pipes and the wake are further discretized by the aid of Galerkin’s technique,resulting in a set of ordinary differential *** ordinary differential equations are further numeri cally solved by using a fourth-order Runge-Kutta integration *** portraits,bifurcation diagrams,an Argand diagram and oscillation shape diagrams are plotted,showing the existence of a lock-in phenomenon and figure-of-eight *** PIP system subjected to cross flow displays some interesting dynamical behaviors different from that of a single-pipe structure.

关键词： Cantilevered PIP structure Theoretical model Flow-induced vibration Cross flow Internal flow

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Effect of turbulent atmosphere on the on-axis average intensity of Pearcey–Gaussian beam

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Chinese Physics B 2016年第6期25卷 264-269页

作者： F Boufalah l Dalil-Essakali h Nebdi A Belafhal laboratory of Nuclear Atomicand Molecular PhysicsDepartment of PhysicsFaculty of SciencesChouab Doukkali University

The propagation characteristics of the Pearcey–Gaussian（PG） beam in turbulent atmosphere are investigated in this *** Pearcey beam is a new kind of paraxial beam,based on the Pearcey function of catastrophe theory,which describes diffraction about a cusp *** using the extended huygens–Fresnel integral formula in the paraxial approximation and the Rytov theory,an analytical expression of axial intensity for the considered beam family is *** numerical results for PG beam propagating in atmospheric turbulence are given by studying the influences of some factors,including incident beam parameters and turbulence strengths.

关键词： turbulent atmosphere Pearcey–Gaussian beam catastrophe theory Rytov theory

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Ischemic penumbra in retina endures： vascular neuropathology is reconciled

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Neural Regeneration Research 2016年第5期11卷 737-739页

作者： David mcleod Academic Department Manchester Royal Eye Hospital and University of Manchester Centre for Ophthalmology & Vision ResearchManchester UK

A physiological state of＂normoxia＂obtains when tissue oxygen tension（pO_2）is sufficient to drive mitochondrial respiration throughout a volume of *** 30-40%of the available oxygen is normally extracted from hemogl... 详细信息

关键词： Ischemic penumbra in retina endures vascular neuropathology is reconciled

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The influence of resistance exercise training prescription variables on skeletal muscle mass,strength,and physical function in healthy adults:An umbrella review

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Journal of Sport and health Science 2024年第1期13卷 47-60页

作者： Jonathan C.mcleod Brad S.Currier Caroline V.lowisz Stuart M.Phillips Department of Kinesiology Faculty of ScienceMcMaster UniversityHamilton L8S4L8Canada

Purpose:The aim of this umbrella review was to determine the impact of resistance training(RT)and individual RT prescription variables on muscle mass,strength,and physical function in healthy ***:Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses(PRISMA)guidelines,we systematically searched and screened eligible systematic reviews reporting the effects of differing RT prescription variables on muscle mass(or its proxies),strength,and/or physical function in healthy adults aged>18 ***:We identified 44 systematic reviews that met our inclusion *** methodological quality of these reviews was assessed using A Measurement Tool to Assess Systematic Reviews;standardized effectiveness statements were *** found that RT was consistently a potent stimulus for increasing skeletal muscle mass(4/4 reviews provide some or sufficient evidence),strength(4/6 reviews provided some or sufficient evidence),and physical function(1/1 review provided some evidence).RT load(6/8 reviews provided some or sufficient evidence),weekly frequency(2/4 reviews provided some or sufficient evidence),volume(3/7 reviews provided some or sufficient evidence),and exercise order(1/1 review provided some evidence)impacted RT-induced increases in muscular *** discovered that 2/3 reviews provided some or sufficient evidence that RT volume and contraction velocity influenced skeletal muscle mass,while 4/7 reviews provided insufficient evidence in favor of RT load impacting skeletal muscle *** was insufficient evidence to conclude that time of day,periodization,inter-set rest,set configuration,set end point,contraction velocity/time under tension,or exercise order(only pertaining to hypertrophy)influenced skeletal muscle adaptations.A paucity of data limited insights into the impact of RT prescription variables on physical ***:Overall,RT increased muscle mass,strength,and physical function compared to no ***

关键词： hypertrophy Resistance training Resistance training prescription variables Strength Umbrella review

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Nonlinear stability of advanced sandwich cylindrical shells comprising porous functionally graded material and carbon nanotube reinforced composite layers under elevated temperature

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Applied Mathematics and Mechanics(English Edition) 2021年第9期42卷 1327-1348页

作者： h.V.TUNG l.T.N.TRANG Faculty of Civil Engineering Hanoi Architectural UniversityHa Noi 10000Viet Nam Faculty of Civil Engineering University of Transport TechnologyHa Noi 10000Viet Nam

The nonlinear stability of sandwich cylindrical shells comprising porous functionally graded material(FGM) and carbon nanotube reinforced composite(CNTRC)layers subjected to uniform temperature rise is investigated. Two sandwich models corresponding to CNTRC and FGM face sheets are proposed. Carbon nanotubes(CNTs) in the CNTRC layer are embedded into a matrix according to functionally graded distributions. The effects of porosity in the FGM and the temperature dependence of properties of all constituent materials are considered. The effective properties of the porous FGM and CNTRC are determined by using the modified and extended versions of a linear mixture rule, respectively. The basic equations governing the stability problem of thin sandwich cylindrical shells are established within the framework of the Donnell shell theory including the von K’arm’an-Donnell nonlinearity. These equations are solved by using the multi-term analytical solutions and the Galerkin method for simply supported *** critical buckling temperatures and postbuckling paths are determined through an iteration procedure. The study reveals that the sandwich shell model with a CNTRC core layer and relatively thin porous FGM face sheets can have the best capacity of thermal load carrying. In addition, unlike the cases of mechanical loads, porosities have beneficial effects on the nonlinear stability of sandwich shells under the thermal load. It is suggested that an appropriate combination of advantages of FGM and CNTRC can result in optimal efficiency for advanced sandwich structures.

关键词： carbon nanotube reinforced composite(CNTRC) porous functionally graded material(FGM) thermal instability cylindrical shell advanced sandwich model

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lIFE： Costing the Digital Preservation lifecycle

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现代图书情报技术 2008年第1期 69-74页

作者： PAUl WhEATlEY PAUl AYRIS RIChARD DAVIES RORY mcleod hElEN ShENTON The British library Boston Spa Wetherby UK UCl Gower Street London UK The British library St Pancras London UK

The lIFE project creates a digital lifecycle model based on previous work undertaken on the lifecycle of paper-based *** Archiving, Voluntarity Deposited Electronic Publications (VDEP), and E-Journal are chosen as case study for application and evaluation of the lIFE *** studies show its potential for further use in a numble of roles,such as improving assessment of the financial commitment,more effective planning for preservation activities *** lIFE Mode will be revised and refined in lIFE2 Project.

关键词：数字资源长期保存生命周期成本 lIFE模型方案

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