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Distinct physiological mechanisms underpin growth and rehydration of Hymenaea courbaril and Hymenaea stigonocarpa upon short-term exposure to drought stress

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Journal of Forestry Research 2023年第1期34卷 113-123页

作者： Luana m.Luz Ediane C.Alves Nariane Q.Vilhena Tamires b.Oliveira Zara G.b.Silva Joze m.N.Freitas candido F.O.Neto Roberto C.L.Costa Lucas C.Costa Universidade Federal Rural da AmazOia CapanemaPA 68700-665Brazil Universidade Federal Rural da AmazEia BelémPA 66077-830Brazil

Plants hold biochemical and physiological mechanisms to withstand drought ***,depending on water deficit interval,plant rehydration relies on how it can retain growth or a positive water balance—or rarely *** this study,two species of Hymenaea,one from the Amazon and the other from the brazilian Cerrado,were investigated for their physiological mechanism associated with growth rehydration upon short-term exposure to drought *** findings demonstrate that Hymenaea courbaril tends to invest in nitrogen to the detriment of carbon compounds,-as it is limited by lower net photosynthesis-and adjust root growth to attenuate drought stress *** contrast,Hymenaea stigonocarpa takes advantage of higher water potential and a basal rate of lower net photosynthesis to support aboveground growth under such ***,it is postulated that there are distinct ways of controlling water status and growth between *** and ***,which are determined either by the ability of the species to keep net photosynthesis at low levels of water content or by favoring the accumulation of nitrogen *** mechanisms were effective with regards to water use efficiency and thus it is reasonable to suggest that strategies are not exclusive and may work under adverse conditions,as observed in Amazon and brazilian Cerrado ***.

关键词： Hymenaea courbaril Hymenaea stigonocarpa Growth Photosynthesis Water deficit

mitochondria–cGAS–STING axis is a potential therapeutic target for senescence-dependent inflammaging-associated neurodegeneration

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Neural Regeneration Research 2025年第3期20卷 805-807页

作者： Josém.Izquierdo Centro de biología molecular Severo Ochoa(Cbm) Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

The word “senescence” comes from the Latin senescens, meaning “to begin to age”, and is characterized by a long-lasting but reversible block in proliferation, resulting from stress-induced cell cycle arrest of pre... 详细信息

关键词： Latin potential lasting

Carbon Dots-Doped Electrospun Fibers for Simultaneous metal Ion Detection and Adsorption of Dyes

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Advanced Fiber materials 2020年第6期2卷 302-313页

作者： mário César A.de Oliveira Elisângela G.de L.Oliveira Indira C.b.Pires Iuri C.m.candido Nikifor Rakov Helinando P.de Oliveira Yutao Xing Glauco S.maciel Institute of materials Science Universidade Federal do Vale do São FranciscoJuazeiroBA 48920-310Brazil Instituto de Física Universidade Federal FluminenseNiteróiRJ 24210-346Brazil

The required treatment and monitoring of contaminants in wastewater reinforces the development of low-cost adsorbents/chemosensors,introducing advantages relative to the detection/removal of toxic metals and ***,it is reported a two-step process of fabrication of fluorescent carbon dots via the hydrothermal treatment of amino acids for the following encapsulation in electrospun *** prominent anionic behavior of electrospun fibers of Eudragit L100 was explored for adsorption of cationic dyes(methylene blue and crystal violet)-with the prevailing electrostatic interaction of parts being favored by the formation of monolayers on the surface of *** the other hand,the controlled release of carbon dots(CDs)from fibers to the reactor can be explored for a second application:the nitrogen ligands from released glycine-based carbon dots can be explored to indicate the presence of metal ions in aqueous *** experiment resulted in a quenching in the fluorescence of the CDs in order of 90%in the emission of particles in the response of the presence of Fe^(3+) ions,characterizing a promising perspective for this experimental system.

关键词： Fluorescence Ferric ion detection Electrospinning Carbon nanostructure

microstructure and room temperature tensile properties of 1μm-SiCp/AZ31b magnesium matrix composite

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Journal of magnesium and Alloys 2015年第2期3卷 155-161页

作者： m.J.Shen X.J.Wang m.F.Zhang b.H.Zhang m.Y.Zheng K.Wu College of Engineering Shenyang Agricultural UniversityShenyang 110866PR China School of materials Science and Engineering Harbin Institute of TechnologyHarbin 150001PR China Liaoning Provincial Gem Quality Supervision and Inspection Center Shenyang 110000PR China

In the present study,AZ31b magnesium matrix composites reinforced with two volume fractions(3 and 5 vol.%)of micron-SiC particles(1μm)were fabricated by semisolid stirring assisted ultrasonic vibration *** as-cast ingots were extruded at 350℃ with the extrusion ratio of 15:1 at a constant ram speed of 15 mm/*** microstructure of the composites was investigated by optical microscopy,scanning electron microscope and transmission electron *** characterization of the composites showed relative uniform reinforcement distribution and significant grain *** presence of 1μm-SiC particles assisted in improving the elastic modulus and tensile *** ultimate tensile strength and yield strength of the 5 vol.%SiCp/AZ31b composites were simultaneously improved.

关键词： magnesium matrix composite microstructure mechanical properties

On a biseparability criterion of bipartite qudit state

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Chinese Physics b 2019年第8期28卷 42-49页

作者： b benzimoun m Daoud LPHE-modeling and Simulation Faculty of SciencesUniversity Mohammed ⅤRabatMorocco Department of Physics Faculty of Sciences-Ain ChockUniversity Hassan ⅡCasablancaMorocco Abdus Salam International Centre for Theoretical Physics TriesteItaly

In this paper,we propose a new approach to tackle the separability problem for bipartite qudit *** is based on the majorana representation which allows to represent a N-spinors(qudit)as a symmetric state of N spin-1/*** also discuss how we can exploit such representation and the notion of the biseparability of multipartite qubit states in the sense to establish new criteria of the separability problem based on the PPT and concurrence.

关键词： separability bipartite qubit state partial separability majorana representation

Phase diagrams and magnetic properties of the mixed spin-1 and spin-3/2 Ising ferromagnetic thin film: monte Carlo treatment

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Chinese Physics b 2019年第2期28卷 414-419页

作者： b boughazi m boughrara m Kerouad Laboratoire Physique des matériaux et modélisation des Systémes(LP2mS) UnitéAssociée au CNRST-URAC:08Faculty of SciencesUniversity Moulay Ismail

Phase diagrams and magnetic properties of the mixed spin-1 and spin-3/2 Ising film with different single-ion anisotropies are investigated, by the use of monte Carlo simulation based on heat bath algorithms. The effects of the crystal-fields and the surface coupling on the phase diagrams are investigated in detail and the obtained phase diagrams are presented. Depending on the Hamiltonian parameters, the system exhibits both second-and first-order phase transitions besides tricritical point, triple point, and isolated critical end point.

关键词： monte Carlo simulation thin film phase diagrams magnetic properties

Strong and ductile mg alloys developed by dislocation engineering

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Journal of materials Science & Technology 2019年第3期35卷 394-395页

作者： m.Wang b.b.He m.X.Huang Department of mechanical Engineering The University of Hong Kong Shenzhen Institute of Research and Innovation The University of Hong Kong

Dislocation engineering concept has been successfully employed to tackle the strength-ductility trade-off in steels, resulting in the development of high-strength high-ductility deformed and partitioned(D&P)steel. The present perspective proposes to employ such dislocation engineering concept to develop strong and ductile magnesium(mg) alloys. High density of dislocations could be generated at appropriate temperature and retained in the mg alloy after quenching to room temperature. Those dislocations inherited from the warm deformation could provide dislocation sources when the mg alloy is deformed at room temperature, resulting in good ductility. The high dislocation density generated at warm deformation provides dislocation forest hardening, leading to improved yield strength of mg alloy.

关键词： Dislocation engineering mg alloys Warm rolling Strength and ductility

Nonlinear continuous bi-inductance electrical line with dissipative elements:Dynamics of the low frequency modulated waves

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Chinese Physics b 2020年第4期29卷 179-189页

作者： S m Ngounou F b Pelap Unite de Recherche de mecanique et de modelisation des Systèmes Physiques(UR-2 mSP) Faculte des SciencesUniversite de DschangBP 69 DschangCameroun Unite de Recherche de matiere Condensee d'Electronique et de Traitement du Signal(UR-mACETS) Faculte des SciencesUniversite de DschangBP 67 DschangCameroun

The dynamics of modulated waves in a nonlinear bi-inductance transmission line with dissipative elements are *** show the existence of two frequency modes and carry out intensive investigations on the low frequency *** to the multiple scales method,the behavior of these waves is investigated and the dissipative effects are *** appears that the dissipation coefficient increases with the carrier wave *** the continuous approximation,we derive that the propagation of these waves is governed by the complex Ginzburg-Landau equation instead of the Korteweg-de-Vries equation as previously *** studies of the dynamics of plane waves in the line reveal the existence of three additional regions in the dispersion curve where the modulational phenomenon is *** the low frequency mode,we demonstrate that the network allows the propagation of dark and bright *** findings are in perfect agreement with the analytical predictions.

关键词： dissipative bi-inductance network low frequency mode continuous approximation complex Ginzburg-Landau equation

Seepage properties of a single rock fracture subjected to triaxial stresses

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Progress in Natural Science:materials International 2007年第12期17卷 1482-1486页

作者： m b Jaksa 5005 Australia School of Civil and Environmental Engineering University of Adelaide

Coupled properties of seepage and stress fields of rock fractures greatly influence the safety of geotechnical engineering work. based on the closing deformation principle of a single rock fracture, equations describing relationships of aperture and triaxial stresses are developed, and coupled models of seepage and triaxial stresses are proposed. Seepage tests are conducted under triaxial stress conditions by adopting hard granite specimens with an artificial fracture. The results show that the normal stress, lateral stress and seepage pressure significantly affect the flow behavior of rock fractures, and that hydraulic conductivity decreases with increasing normal stress, but increases with rising lateral stress or seepage pressure. In addition, an exponential function provides a good representation of the seepage characteristics of a single rock fracture subjected to triaxial stresses.

关键词： triaxial stresses rock fractures seepage hydraulic conductivity coupling model.