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Effects of La on Microstructure and Corrosion Behavior of AlSi5Cu1Mg Alloy

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Acta Metallurgica Sinica(English Letters) 2019年第4期32卷 443-451页

作者： Bao-Biao Yu Hong Yan jian-bin zhu jian-Long Liu Huo-Gen Li Qiao Nie School of Mechanical and Electrical Engineering Nanchang University Key Laboratory of Light Alloy Preparation and Processing in Nanchang City jiangxi Ling-Ge Non-ferrous Metal Processing Co. Ltd.

The microstructures and corrosion behavior of AlSi5 CulMg alloy modified with different contents of La were *** microscopy observations showed that the microstructures of AlSi5 Cu1 Mg-xLa(x = 0, 0.3, 0.6, and 0.9 wt%) alloy transformed from coarse cellular to fine cellular as the content of La increased from 0 to 0.9 wt%. The results of electrochemical measurement and immersion test in 3.5 wt% NaCl solution showed that the corrosion resistance of AlSi5 CulMg-xLa alloy strongly depended on its microstructures. The AlSi5 Cu1 Mg-0.6 La sample exhibited the highest corrosion resistance due to its fine cellular structure and the cathode phases coated by the La element. The covering film of La hindered the corrosion electron flowing between the cathode and the anode. As a result, the corrosion current density of the AlSi5 CulMg-0.6 La alloy was only about 40% that of the matrix alloy in the electrochemical measurement.

关键词： La AlSi5Cu1Mg alloy Microstructure Corrosion behavior

System design and measurements of flux concentrator and its solid-state modulator for CEPC positron source

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Nuclear Science and Techniques 2021年第7期32卷 108-117页

作者： Jing-Dong Liu Xiao-Ping Li Cai Meng Yun-Long Chi Guo-Xi Pei Da-Yong He Jing-Yi Li Xian-Jing Sun Jing-Ru Zhang Lei Shang jian-bin zhu National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Positron sources are one of the most important components of the injector of a circular electron positron collector(CEPC).The CEPC is designed as an e^(+)e^(−)collider for a Higgs *** accelerator system is composed of 100-km-long storage rings and an *** design goal of the positron source is to obtain positron beams with a bunch charge of 3 *** flux concentrator(FC)is one of the cores of the positron *** paper reports the design,development,and measurements of an FC prototype *** prototype includes an FC and an all-solid-state high-current pulse *** tests show that the peak current on the FC can reach 15.5 kA,and the peak magnetic field can reach 6.2 *** test results are consistent with the theoretical *** FC system fulfills the requirements of the CEPC positron source as well as provides a reference for the development of similar devices both domestically and abroad.

关键词： CEPC positron source Flux concentrator Solid-state modulator High current Peak magnetic field

Prevalence,risk factors and clinical features of sensory A-V pattern exotropia

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International Journal of Ophthalmology(English edition) 2025年第2期18卷 323-329页

作者： bin-bin zhu Shi-Yu Tang Xiang-Jun Wang Li-Cheng Fu jian-Hua Yan State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-Sen UniversityGuangzhou 510060Guangdong ProvinceChina Ophthalmology Department of Surgerythe Second People’s Hospital of FoshanFoshan 528000Guangdong ProvinceChina

AIM:To investigate the potential mechanisms of A-V pattern and evaluate the surgical outcomes used in the treatment of sensory ***:The medical records of patients with sensory A-V pattern exotropia who underwent strabismus surgery between May 2014 to June 2019 was retrospectively *** control group included sensory exotropia patients without A-V pattern and concomitant A-V pattern exotropia patients with normal vision who undergone strabismus surgery over this same time *** alignment,best corrected visual acuity,oblique muscle function,and stereopsis records were ***:Among the 843 eligible patients,91(10.79%;39 males and 52 females)had A-pattern(54,6.4%)or V-pattern(37,4.4%).Age at onset of vision impairment was 4±5y and at the time of surgery was 25±*** significant negative correlations were present between impaired visual acuity and the pre-operative exodeviation(r=-0.198,P=0.016)and patterns(r=-0.207,P=0.015).Age at surgery and exodeviation in patients with concomitant A-V pattern exotropia was significantly earlier as compared with that of sensory A-V pattern exotropia and sensory exotropia(both P<0.0001).There were no significant differences in these clinical variables between sensory exotropia with or without A-V *** and pattern were significantly reduced in patients receiving horizontal rectus surgery with or without oblique muscle surgery(both P<0.0001).CONCLUSION:The prevalence of sensory A-V pattern exotropia in our study is 10.79%.Visual acuity represents an important factor contributing to the occurrence and development of A-V *** horizontal rectus surgery can provide a good option for the correction of sensory A-V pattern exotropia.

关键词： sensory exotropia A-V pattern oblique muscle dysfunction horizontal rectus surgery

A preliminary investigation of skin-derived precursor cells and their roles in nerve regeneration

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A preliminary investigation of skin-derived precursor cells ...

Effects of biomass co-pyrolysis and herbaceous plant colonization on the transformation of tailings into soil like substrate

中国神经科学学会第十届全国学术会议

作者： Cheng-bin Xue Qian Feng Hui zhu Xi Xu jian-bin zhu Xiao-Song Gu jiangsu Key Laboratory of Neuroregeneration Nantong University Surgical comprehensive laboratory Affiliated Hospital of Nantong University

Objective The purpose of the present study was to establish the methods for inducing skin-derived precursor cells（SKPs） to differentiate into Schwann cells（SKP-SCs） and investigate their biological function in vitro trying to find ideal support cells for tissue-engineered nerve grafts（TENGs）.Methods The SKPs were isolated from the dorsal skin tissues of neonatal rats and were induced to SKP-SCs in *** of them were identified by immunofluorescence *** molecular expression of SCs,SKPs and SKP-SCs were compared by *** the effect of axonal growth and myelination in the dorsal root ganglion（DRG） neurons was investigated when they co-cultured with DRG neurons ***（1） The purified SKPs spheres were positive for nestin,fibronectin,vimentin and versican.（2） Similar to SCs,the SKP-SCs had uniform shape and were positive for Sl00p,glial fibrillary acidic protein（GFAP） and neurotrophin low-affinity（NGFR p75）,which were cell marker of SCs.（3） Both SKP-SCs and SCs were found to express nerve growth factor（NGF）,brain derived neurophic factor（BDNF）,ciliary neurotrophic factor（CNTF） and glial cell derived neurotrophic factor（GDNF） and promote the growth of neurites in DRG neurons more vigorously than the *** also detected positive expression of MAG in myehnation experiment,which showed that SKP-SCs had the potential to *** The induced SKPs had the potential to differentiate into SKP-SCs in *** SKP-SCs had the similar biological functions with the SCs and the potential to promote the nerve regeneration.

关键词： skin-derived precursor cells(SKPs) peripheral nerve regeneration tissue-engineered nerve grafts(TENGs)

来源： cnki会议评论

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Journal of Environmental Sciences 2025年第1期147卷 230-243页

作者： bin zhu Meiyan Si Xin Xie Ximin Yan jianhong Huang Senlin Tian Ping Ning Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China Guizhou Research Institute of Coal Mine Design Co. Ltd.Guiyang 550025China

Enhancing soil organic matter characteristics,ameliorating physical structure,mitigating heavy metal toxicity,and hastening mineral weathering processes are crucial approaches to accomplish the transition of tailings substrate to a soil-like *** incorporation of biomass co-pyrolysis and plant colonization has been established to be a significant factor in soil substrate formation and soil pollutant *** this,there is presently an absence of research efforts aimed at synergistically utilizing these two technologies to expedite the process of mining tailings soil substrate *** current study aimed to investigate the underlying mechanism of geochemical changes and rapid mineral weathering during the process of transforming tailings substrate into a soil-like substrate,under the combined effects of biomass co-smoldering pyrolysis and plant *** findings of this study suggest that the incorporation of smoldering pyrolysis and plant colonization induces a high-temperature effect and biological effects,which enhance the physical and chemical properties of tailings,while simultaneously accelerating the rate of mineral *** improvements include the amelioration of extreme pH levels,nutrient enrichment,the formation of aggregates,and an increase in enzyme activity,all of which collectively demonstrate the successful attainment of tailings substrate *** of the acceleratedweathering was verified by phase and surfacemorphology analysis using X-ray diffraction and scanning electron *** corrosion and fragmentation on the surface *** weathering resulted in corrosion and fragmentation of the surface of the treated *** study confirms that co-smoldering pyrolysis of biomass,combined with plant colonization,can effectively promote the transformation of tailings into soil-like *** method has can effectively address the key challenges that have previously hind

关键词： Smoldering Biomass co-pyrolysis Phytoremediation Soil-like substrate Tailing restoration

Bioenergy recovery and carbon emissions benefits of short-term bio-thermophilic pretreatment on low organic sewage sludge anaerobic digestion:A pilot-scale study

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Journal of Environmental Sciences 2025年第2期148卷 321-335页

作者： Hui Wang Xiang Fu Haozhe Huang Danni Shen Dongdong Fan Liming zhu Xiaohu Dai bin Dong College of Environmental Science and Engineering Tongji UniversityShanghai 200092China Yangtze Eco-Environment Engineering Research Center China Three Gorges CorporationBeijing 100038China Yangtze River Eco-Environmental Engineering Research Center Shanghai InvestigationDesign and Research Institute Co.LTDShanghai 200092China China Construction Third Engineering Bureau First Engineering Co. Ltd.Wuhan 430000China

Sewage sludge in cities of Yangzi River Belt,China,generally exhibits a lower organic content and higher silt contentdue to leakage of drainage system,which caused low bioenergy recovery and carbon emission benefits in conventional anaerobic digestion(CAD).Therefore,this paper is on a pilot scale,a bio-thermophilic pretreatment anaerobic digestion(BTPAD)for low organic sludge(volatile solids(VS)of 4%)was operated with a long-term continuous flow of 200 *** VS degradation rate and CH_(4) yield of BTPAD increased by 19.93%and 53.33%,respectively,compared to those of *** analysis of organic compositions in sludge revealed that BTPAD mainly improved the hydrolysis of proteins in *** analysis of microbial community proportions by high-throughput sequencing revealed that the short-term bio-thermophilic pretreatment was enriched in Clostridiales,Coprothermobacter and Gelria,was capable of hydrolyzing acidified proteins,and provided more volatile fatty acid(VFA)for the subsequent *** combined with fluorescence quantitative polymerase chain reaction(PCR)analysis showed that the number of bacteria with high methanogenic capacity in BTPAD was much higher than that in CAD during the medium temperature digestion stage,indicating that short-term bio-thermophilic pretreatment could provide better methanogenic conditions for ***,the greenhouse gas emission footprint analysis showed that short-term bio-thermophilic pretreatment could reduce the carbon emission of sludge anaerobic digestion system by 19.18%.

关键词： Sludge Anaerobic digestion Bio-thermophilic pretreatment Pilot scale Molecular microbiology Carbon emissions

Environmental colloid behaviors of humic acid-Cadmium nanoparticles in aquatic environments

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Journal of Environmental Sciences 2025年第3期149卷 663-675页

作者： Ruyi Zheng jian zhu Peng Liao Dengjun Wang PanWu Wenjian Mao Yuqin Zhang Weiwei Wang College of Resources and Environment Engineering Key Laboratory of Karst Georesources and EnvironmentMinistry of EducationGuizhou UniversityGuiyang 550025China Guizhou Karst Environmental Ecosystems Observation and Research Station Ministry of EducationGuizhou UniversityGuiyang 550025China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of ScienceGuiyang 550081China School of Fisheries Aquaculture and Aquatic SciencesAuburn UniversityAuburnAL 36849USA

Humic acid(HA),a principal constituent of natural organic matter(NOM),manifests ubiquitously across diverse ecosystems and can significantly influence the environmental behaviors of Cd(II)in aquatic *** studies on NOM-Cd(II)interactions have primarily focused on the immobilization of Cd(II)solids,but little is known about the colloidal stability of organically complexed Cd(II)particles in the *** this study,we investigated the formation of HA-Cd(II)colloids and quantified their aggregation,stability,and transport behaviors in a saturated porous media representative of typical subsurface *** from batch experiments indicated that the relative quantity of HA-Cd(II)colloids increased with increasing C/Cd molar ratio and that the carboxyl functional groups of HA dominated the stability of HA-Cd(II)*** results of correlation analysis between particle size,critical aggregation concentration(CCC),and zeta potential indicated that both Derjaguin-Landau-Verwey-Overbeek(DLVO)and non-DLVO interactions contributed to the enhanced colloidal stability of HA-Cd(II)*** results further confirmed that the stable HA-Cd(II)colloid can transport fast in a saturated media composed of clean ***,this study provides newknowledge of the colloidal behaviors of NOM-Cd(II)nanoparticles,which is important for better understanding the ultimate cycling of Cd(II)in aquatic systems.

关键词： HA-Cd(II)colloids Colloid formation Colloid aggregation Transport

Pilot-scale testing on catalytic hydrolysis of carbonyl sulfur combined with absorption-oxidation of H_(2)S for blast furnace gas purification

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Journal of Environmental Sciences 2025年第5期151卷 360-372页

作者： Yuting Lin Yuran Li bin Wang Jinglei Tian Hongqiang Liu Yiren Li Zhicheng Xu Qiang Cao Tingyu zhu CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China HBIS Group Co. Ltd.Shijiazhuang 050023China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

About 70%of the flue gas in the iron-steel industry has achieved multi-pollutant ultra-low emissions in China until 2023,and then the blast furnace gas purification has become the control step and *** research group has designed and constructed the world’s first blast furnace gas desulfurization pilot plant with the scale of 2000 Nm^(3)/h in October *** pilot plant is a two-step combined desulfurization device including catalytic hydrolysis of carbonyl sulfur(COS)and absorption-oxidation of H_(2)S,continuously running for 120 *** the hydrolysis system,one reason for catalyst deactivation has been verified from the sulfur *** in blast furnace gas can be hydrolyzed on the hydrolysis catalyst to produce the nitrogen deposition,which is one of the reasons for catalyst deactivation and has never been found in previous *** deposition forms of S and N elements are determined,S element forms elemental sulfur and sulfate,while N element forms-NH_(2)and NH_(4)^(+).In the absorption-oxidation system,the O_(2)loading and the residence time have been optimized to control the oxidation of HS^(−)to produce elemental sulfur instead of by-product S_(2)O_(3)^(2−).The balance and distribution of S and N elements have been calculated for thewholemulti-phase system,approximately 84.4%of the sulfur is converted to solid sulfur product,about 1.3%of the sulfur and 19.2%of N element are deposited on the hydrolysis *** pilot plant provides technical support formulti-pollutant control of blast furnace.

关键词： Blast furnace gas Carbonyl sulfur Hydrogen sulfide Hydrogen cyanide Hydrolysis and oxidation Activated carbon

Carbon Nanofiber/Polyaniline Composite Aerogel with Excellent Electromagnetic Interference Shielding,Low Thermal Conductivity,and Extremely Low Heat Release

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Nano-Micro Letters 2025年第4期17卷 77-95页

作者： Mingyi Chen jian zhu Kai Zhang Hongkang Zhou Yufei Gao Jie Fan Rouxi Chen Hsing-Lin Wang School of Textile Science and Engineering Tiangong UniversityTianjin 300387People’s Republic of China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China School of Innovation and Entrepreneurship Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Guangdong Provincial Key Laboratory of Energy Materials for Electric Power Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Ministry of Education Key Laboratory of Advanced Textile Composite Materials Tiangong UniversityTianjin 300387People’s Republic of China

The rapid development of communication technology and high-frequency electronic devices has created a need for more advanced electromagnetic interference(EMI)shielding *** response to this demand,a study has been conducted to develop multifunctional carbon nanofibers(CNFs)/polyaniline(PANI)aerogels with excellent electromagnetic interference shielding,flame retardancy,and thermal insulation *** process involved freeze-drying of electrospun CNFs and PANI nanoparticles followed by in situ growth PANI to coat the CNFs,creating the core-shell structured CNFs/PANI composite fiber and its hybrid aerogels(CP-3@PANI).The interaction between PANI and aniline(ANI)provides attachment sites,allowing additional ANI adsorption into the aerogel for in situ *** results in PANI uniformly covering the surface of the CNFs,creating a core-shell composite fiber with a flexible CNF core and PANI *** process enhances the utilization rate of the ANI monomer and increases the PANI content loaded onto the ***,effective connections are established between the CNFs,forming a stable,conductive three-dimensional network *** prepared CP-3@PANI aerogels exhibit excellent EMI shielding efficiency(SE)of 85.4 dB and specific EMI SE(SE d^(-1))of 791.2 dB cm^(3)g^(-1)in the *** to the synergistic flame-retardant effect of CNFs,PANI,and the dopant(phytic acid),the CP-3@PANI aerogels demonstrate outstanding flame-retardant and thermal insulation properties,with a peak heat release rate(PHRR)as low as 7.8 W g^(-1)and a total heat release of only 0.58 kJ g^(-1).This study provides an effective strategy for preparing multifunctional integrated EMI shielding materials.

关键词： CNFs/PANI hybrid aerogels EMI shielding Flame retardancy Thermal insulation