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Controlled synthesis of monodispersed spherical ruthenium powders

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Rare Metals 2023年第12期42卷 4246-4254页

作者： Feng-shuo xu Hao Cui Man-Men Liu Jia-Lin Chen Ming Wen Chuan-Jun Wang Wei Wang Song Li xu-Dong Sun Shao-Hong Liu Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Yunnan Precious Metals Laboratory Co.Ltd.Kunming 650106China

Monodispersed spherical Ru powders are essential for fabricating high-performance Ru sputtering targets,which have applications in very-large-scale integration circuits and magnetic recording ***,the synthesis of such powders remains a major ***,we reported the synthesis of monodispersed spherical Ru powders through controlling the molar ratio of SO_(4)^(2-)to Ru^(3+)in urea homogeneous precipitation solution and the annealing *** the addition of(NH4)2SO_(4)into the reaction solution,only gel-like precipitation particles were *** introducing(NH_(4))_(2)SO_(4) into the reaction solution and controlling the molar ratio of SO_(4)^(2-)to Ru3+between 0.50 and 1.00,monodispersed spherical precursor powders were *** nucleation and growth of monodispersed spherical precursor particles in solution were found to conform to LaMer's *** controlled annealing at 450℃in a hydrogen atmosphere,the obtained metallic Ru powder with an average particle size of 135 nm inherited the spherical morphology and excellent dispersity from the monodispersed spherical precursor *** results and findings would deepen the understanding of the preparation of monodispersed Ru and Ru-like powders.

关键词： Ruthenium Sputtering target Spherical powder Integration circuits Magnetic recording

Effect of icosahedral phase formation on the stress corrosion cracking(SCC)behaviors of the as-cast Mg-8%Li(in wt.%)based alloys

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Journal of Magnesium and Alloys 2024年第1期12卷 225-236页

作者： shuo Wang Daokui xu Dongliang Wang Zhiqiang Zhang Baojie Wang Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Engineering Research Center of Advanced Materials Preparing Technology Ministry of EducationNortheastern UniversityShenyang110819China School of Environmental and Chemical Engineering Shenyang Ligong UniversityShenyang110159China Binzhou Institute of Technology BinzhouShandong Province256606China Shandong Key Laboratory of Advanced Aluminium Materials and Technology BinzhouShandong Province256606China

Through exploring the stress corrosion cracking(SCC)behaviors of the as-cast Mg-8%Li and Mg-8%Li-6%Zn-1.2%Y alloys in a 0.1 M NaCl solution,it revealed that the SCC susceptibility index(I_(SCC))of the Mg-8%Li alloy was 47%,whilst the I_(SCC)of the Mg-8%Li-6%Zn-1.2%Y alloy was 68%.Surface,cross-sectional and fractography observations indicated that for the Mg-8%Li alloy,theα-Mg/β-Li interfaces acted as the preferential crack initiation sites and propagation paths during the SCC *** regard to the Mg-8%Li-6%Zn-1.2%Y alloy,the crack initiation sites included the I-phase and the interfaces of I-phase/β-Li andα-Mg/β-Li,and the preferential propagation paths were the I-phase/β-Li andα-Mg/β-Li ***,the SCC of the two alloys was concerned with hydrogen embrittlement(HE)mechanism.

关键词： Magnesium-lithium alloy Stress corrosion cracking I-phase Fracture analysis

Ferroptosis:mechanisms and links with diseases

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Signal Transduction and Targeted Therapy 2021年第3期6卷 648-663页

作者： Hong-fa Yan Ting Zou Qing-zhang Tuo shuo xu Hua Li Abdel Ali Belaidi Peng Lei Department of Neurology and State Key Laboratory of Biotherapy West China HospitalSichuan Universityand Collaborative Center for Biotherapy610041 ChengduChina West China School of Basic Medical Sciences and Forensic Medicine Sichuan University610041 ChengduChina Melbourne Dementia Research Centre and the Florey Institute of Neuroscience and Mental Health The University of MelbourneParkvilleVIC 3052Australia

Ferroptosis is an iron-dependent cell death,which is different from apoptosis,necrosis,autophagy,and other forms of cell *** process of feroptotic cell death is defined by the accumulation of lethal lipid species derived from the peroxidation of lipids,which can be prevented by iron chelators(***,deferoxamine)and small lipophilic antioxidants(e.g,ferrostatin,liproxstatin).This review summarizes current knowledge about the regulatory mechanism of ferroptosis and its association withseveral pathways,including iron,lipid,and cysteine *** have further discussed the contribution of ferroptosis to thepathogenesis of several diseases such as cancer,ischemia/reperfusion,and various neurodegenerative diseases(*** and Parkinson's disease),and evaluated the therapeutic applications of ferroptosis inhibitors in clinics.

关键词： diseases peroxidation death

Comparative study on bearing mechanism and design parameters of confined concrete arch joints in deep soft rock roadway

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International Journal of Coal Science & Technology 2019年第4期6卷 493-504页

作者： Wei Lu Qi Wang Bei Jiang shuo xu Bohong Liu Peng Zhang Zhenhua Jiang Research Center of Geotechnical and Structural Engineering Shandong UniversityJinan 250061China Key Laboratory for Geo-mechanics and Deep Underground Engineering China University of Mining and TechnologyBeijingChina School of Civil Engineering and Architecture University of JinanJinan 250022China

Square confined concrete arch is increasingly used in deep soft rock roadway support because of its advantages of high strength and construction ***,the design of confined concrete arch in underground engineering still remains in experience-based method and lacks quantitative *** a connecting component between arch sections,the connection joints have an important influence on the internal force distribution and failure mechanism of support ***,a reasonable design of arch joints is the premise of rational support *** Liangjia Coal Mine,a typical deep soft rock mine in China,as research background,this paper fully compared the most widely used joint types of confined concrete arch as analytical objects:flange joints and casing *** main failure modes of these two kinds of joints under bending moment are *** and numerical tests are carried out to study the mechanical characteristics of *** on the M-θ curve,the influence law of different design parameters is analyzed,and the design principles of joints are *** research results could provide a theoretical basis for the design and application of confined concrete arch in related projects.

关键词： Confined concrete arch Soft rock roadway Bearing mechanism Failure mode Casing joint

Comparison of canaloplasty and trabeculectomy for open angle glaucoma：a Meta-analysis

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International Journal of Ophthalmology(English edition) 2016年第12期9卷 1814-1819页

作者： Zhong-Jing Lin shuo xu Shou-Yue Huang Xiao-Bin Zhang Yi-Sheng Zhong Department of Ophthalmology Ruijin Hospital Affiliated Medical School Shanghai Jiao Tong University Shanghai 200025 China Department of Ophthalmology Hubei University of Science and Technology Xialming 437100 Hubei Province China

AIM： To evaluate the advantage of canaloplasty compared to trabeculectomy for patients with open angle ***： Potentially relevant studies were systematically searched using various databases from inception until December 2015. The outcome analyses performed automatically using Revman 5.3 included intraocular pressure reduction （IOPR）, postoperative success rate, anti-glaucoma medications reduction and the incidence of adverse ***： We included four qualified studies incorporating a total of 215 eyes for quantitative synthesis. The weighted mean difference （WMD） of IOPR between canaloplasty and trabeculectomy from baseline to 12mo was -2.33 （95%CI： -4.00, -0.66）. There was not significant improvement in the complete or qualified success rate （OR： 0.58, 95%CI： 0.26, 1.31; OR： 0.50, 95%CI： 0.10, 2.44, respectively）. Similarly, no statistically significance was observed in anti-glaucoma mediations reduction （WMD： -0.54, 95%CI： -1.18, 0.09）. Sensitivity analysis of the primary outcome estimate confirmed the stability of the Meta-analysis ***： Trabeculectomy seems to be more effective in lowering IOP up to 12mo when comparing with canaloplasty. Canaloplasty does not seem to be inferior to trabeculectomy considering the postoperative success rate or the number of postoperative anti-glaucoma medications. Meanwhile, it has an advantage of less bleb related complications.

关键词： canaloplasty trabeculectomy open angle glaucoma Meta-analysis

mTORC2:The“Ace in the Hole”for a Broader Control of Epileptic Seizures?

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Neuroscience Bulletin 2024年第5期40卷 677-679页

作者： shuo Zhang Xiongfeng Guo Wei Huang Cenglin xu Department of Pharmacy The First Affiliated Hospital of Zhejiang Chinese Medical University(Zhejiang Provincial Hospital of Chinese Medicine)Hangzhou310006China The Second Affiliated Hospital of Zhejiang Chinese Medical University(Zhejiang Xinhua Hospital) Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang ProvinceSchool of Pharmaceutical SciencesZhejiang Chinese Medical UniversityHangzhou310053China

Over 70 million people worldwide suffer from epilepsy-one of the most prevalent chronic neurological disorders[1].Despite the availability of over thirty anti-seizure drugs(ASDs)that mainly act on voltage-gated ion channels or inhibitory GABAergic receptors,the effectiveness of these drugs in achieving seizure freedom remains unsatisfactory due to pharmacoresistance and the inevitable occurrence of side-effects.

关键词： drugs spite epilepsy

Chain Dynamics Heterogeneity in Plasticized Poly(vinyl butyral)(PVB) as Elucidated by Solid-State NMR

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Chinese Journal of Polymer Science 2024年第1期42卷 113-124,I0010页

作者： Jing Lv xu Chen Zi-shuo Wu Ya-Hui Li Wei Chen National Synchrotron Radiation Laboratory Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmCAS Key Laboratory of Soft Matter ChemistryUniversity of Scienceand Technology of ChinaHefei 230026China

The chain dynamics heterogeneity of the poly(vinyl butyral)(PVB) plasticized by triethylene glycol bis(2-ethylhexa noate)(TEG-EH) was investigated by various solid-state NMR *** plasticized PVB shows two domains in distinct molecular dynamics differences,namely,rigid and soft domains,where the latter is the plasticizer-rich *** time domain low field NMR was first used to investigate the dynamics heterogeneity of the plasticized PVB,and the results show the decreasing activated energy of components in the soft domain of plasticized PVB(E_a=20.2 kJ/mol) as compared with that of the pristine one(E_a=24.3 kJ/mol).Detailed dynamics heterogeneity was obtained by high-field NMR with site-specific *** quadrupole-echo ~2H-NMR was adopted to elucidate the dynamics heterogeneity of the vinyl alcohol(VA) units,where only the hydroxyl group of VA is *** ~1H-^(13)C WISE NMR spectra show that there is not much difference in the mobility of the VB unit in PVB with and without plasticizer,whereas the glass transition temperature differed by approximately 53℃.This is further supported by Torchia's T_1 relaxation *** origin of such an unusual phenomenon is attributed to the critical role of the remaining VA(~22%) in the soft domain,where the VA units locally aggregate through hydrogen ***,the existence of a mobility gradient in the VB unit has been ***,the mobility difference for VB with different stereo-geometry(meso or racemic conformation) is observed for the first *** indicates the importance of modulating the ratio of meso over racemic VB for controlling the macroscopic perfo rmance of PVB.

关键词： Poly(vinyl butyral) Dynamics heterogeneity Plasticizer Solid state NMR

Effect of linear friction welding process on microstructure evolution,mechanical properties and corrosion behavior of GH4169 superalloy

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Chinese Journal of Aeronautics 2024年第6期37卷 504-520页

作者： Yu SU Xiawei YANG Tingxi MENG Dong WU Rui xu Haiyu xu Wenya LI shuo YIN State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Mechanical Manufacturing&Biomedical EngineeringParsons BuildingTrinity College DublinThe University of DublinDublin 2Ireland

Linear Friction Welding(LFW)technology was used to realize the welding of GH4169 superalloy,and the effect of welding parameters on the microstructure,mechanical properties and corrosion behavior of the joint was *** results show that there is a positive correlation between the weld hardness and the tensile *** the gradual increase of heat input and welding pressure,the joint quality is gradually improved,but the heat affected zone is not significantly *** smaller the grain size of the weld,the higher the strength and plasticity of the *** the increase of the joint shortening amount,the corrosion resistance of the weld first gradually ***,when the shortening reaches a certain level,the corrosion resistance of the joint becomes little *** the increase of solution temperature,the corrosion current density increases and the polarization impedance *** higher the corrosion temperature,the worse the corrosion resistance of the *** is no significant correlation between the joint strength and the corrosion *** corrosion resistance of the joint can be enhanced without changing the joint mechanical properties by reducing the welding frequency and amplitude or increasing the welding pressure.

关键词： Linear Friction Welding(LFW) GH4169 superalloy Microstructure Mechanical properties Corrosion behavior

Conductive and stable polyphenylene/CNT composite membrane for electrically enhanced membrane fouling mitigation

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 35-47页

作者： Huijuan Xie Haiguang Zhang xu Wang Gaoliang Wei shuo Chen Xie Quan Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

Nanocarbon-based conductive membranes, especially carbon nanotube (CNT)-based membranes, have tremendous potential for wastewater treatment and water purification because of their excellent water permeability and selectivity, as well as their electrochemically enhanced performance (e.g., improved antifouling ability). However, it remains challenging to prepare CNT membranes with high structural stability and high electrical conductivity. In this study, a highly electroconductive and structurally stable polyphenylene/CNT (PP/CNT) composite membrane was prepared by electropolymerizing biphenyl on a CNT hollow fiber membrane. The PP/CNT membrane showed 3.4 and 5.0 times higher electrical conductivity than pure CNT and poly(vinyl alcohol)/CNT (PVA/CNT) membranes, respectively. The structural stability of the membrane was superior to that of the pure CNT membrane and comparable to that of the PVA/CNT membrane. The membrane fouling was significantly alleviated under an electrical assistance of −2.0 V, with a flux loss of only 11.7% after 5 h filtration of humic acid, which is significantly lower than those of PP/CNT membranes without electro-assistance (56.8%) and commercial polyvinylidene fluoride (PVDF) membranes (64.1%). Additionally, the rejection of negatively charged pollutants (humic acid and sodium alginate) was improved by the enhanced electrostatic repulsion. After four consecutive filtration-cleaning cycle tests, the flux recovery rate after backwashing reached 97.2%, which was much higher than those of electricity-free PP/CNT membranes (67.0%) and commercial PVDF membranes (61.1%). This study offers insights into the preparation of stable conductive membranes for membrane fouling control in potential water treatment applications.

关键词： Polyphenylene CNTs Membrane Electro-assistance Membrane fouling mitigation