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International Journal of Minerals,Metallurgy and Materials 2022年第8期29卷 1589-1595页

作者： Dong wu Wenya Li Qiang chu Yangfan Zou Xichang Liu Yanjun Gao State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi’an 710072China Capital Aerospace Machinery Company Beijing 100076China

The bobbin tool friction stir welding process was used to join 6 mm thick 5A06 aluminum alloy *** microscope was used to characterize the *** electron backscatter diffraction(EBSD)identified the effect of non-homogeneous microstructure on the tensile *** was observed that the grain size in the top of the stir zone(SZ)is smaller than that in the centre *** lowest ratio of recrystallization and density of the geometrically-necessary dislocations(GNDs)in the SZ was found in the middle near the thermo-mechanically affected zone(TMAZ)being 22%and 1.15×10^(−13) m^(−2),*** texture strength of the heat-affected zone(HAZ)is the largest,followed by that in the SZ,with the lowest being in the *** were additional interfaces developed which contributed to the strengthening mechanism,and their effect on tensile strength was *** tensile tests identified the weakest part in the joint at the interfaces,and the specific reduction value is about 93 MPa.

关键词： friction stir welding bobbin-tool local microstructure strengthening mechanisms adjustable-gap

Fission yeast cells mix parental mitochondria in a progressive manner during meiosis

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Journal of Molecular Cell Biology 2022年第11期14卷 62-75页

作者： Daqiang wu Yongkang chu Wenfan Wei Ling Liu chuanhai Fu Ministry of Education Key Laboratory for Cellular Dynamics Hefei National Laboratory for Physical Sciences at the MicroscaleDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230027China Anhui Province Key Laboratory of Research&Development of Chinese Medicine College of Integrated Chinese and Western MedicineAnhui University of Chinese MedicineHefei 230038China

Mitochondria in many fungi are inherited uniparentally during meiosis. It has remained unclear whether parental mitochondria in the fission yeast Schizosaccharomyces pombe are inherited uniparentally or biparentally. Here, we assessed the mixing of parental mitochondria carefully by live-cell microscopy and developed an algorithm to determine the degree of mitochondrial mixing in a quantitative manner. We found that parental mitochondria in fission yeast cells were mixed progressively as meiosis progressed. Moreover, we established that mitochondrial fission and the size of the conjugation neck are the limiting factors in restricting the mixing of parental mitochondria. We further employed a combination of quantitative polymerase chain reaction, fluorescent live-cell microscopy, and transmission electron microscopy approaches to examine the mitochondrial inheritance of progeny cells derived from a cross between wild-type and Rho0 (mitochondrial DNA absent) cells. The results show that all progeny cells of the cross carry mitochondrial DNA. Hence, our data support the model in which parental mitochondria in the fission yeast S. pombe are inherited biparentally during meiosis.

关键词： mitochondria mitochondrial inheritance mitochondrial fission fission yeast

Phanerozoic oceanic and climatic perturbations in the context of Tethyan evolution

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Science China Earth Sciences 2023年第12期66卷 2791-2806页

作者： Li TIAN Haijun SONG Yuchu LIu Yuyang wu Daoliang chu Huyue SONG State Key Laboratory of Biogeology and Environmental Geology School of Earth SciencesChina University of Geosciences(Wuhan)Wuhan 430074China

Climatic and environmental conditions play a pivotal role in the evolution of the biosphere,serving as the primary natural factors influencing biological evolution and the development of human *** study of the evolution of Earth's habitability primarily revolves around the reconstruction of climatic and oceanic conditions in geohistorical periods,shedding light on their dynamic *** paper collates classic geological indicators and geochemical proxies associated with paleoclimatic and oceanic environmental *** latest“big data”analyses and simulations made possible by the availability of previously unimagined massive datasets reveal several key findings:During the early Paleozoic,atmospheric oxygen levels were low,and widespread oceanic anoxia was prevalent;the Devonian era witnessed a greenhouse climate,followed by the Carboniferous ice age characterized by higher oceanic oxidation levels and *** latest Paleozoic deglaciation occurred under high pCO_(2) conditions,extending into much of the Mesozoic and early Cenozoic,marked by multiple hyperthermal and anoxia expansion events,until the resurgence of global glaciation in the middle-late stages of the Cenozoic,ultimately bringing environmental and climatic conditions closer to modern *** correlating the aforementioned long-term trends with major geological events,we can delineate the co-evolution of paleoclimate and oceanic environments in tandem with the development of Tethys tectonics as follows.(1)During the Proto-Tethys stage,global paleo-elevations were relatively low,and atmospheric oxygen levels were also relatively *** the occurrence of significant tectonic movements that led to noticeable transgressive-regressive cycles,their effects on climate and oceanic environments were somewhat limited due to the relatively weak interactions.(2)The emergence of the Paleo-Tethys was a significant event that coincided with the formation of the supercontinent Panga

关键词： Paleo-temperature Paleo-redox Paleo-pH Tectonic movements Earth's habitability

Moderately concentrated electrolyte enabling high-performance lithium metal batteries with a wide working temperature range

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Journal of Energy Chemistry 2023年第4期79卷 201-210页

作者： Sisi Wang Zhichen Xue Fulu chu Zengqiang Guan Jie Lei Feixiang wu School of Metallurgy and Environment Engineering Research Center of the Ministry of Education for Advanced Battery MaterialsHunan Provincial Key Laboratory of Nonferrous Value-added MetallurgyState Key Laboratory of Powder MetallurgyCentral South UniversityChangsha 410083HunanChina

The electrolyte integrated with lithium metal anodes is subjected to the issues of interfacial compatibility and stability,which strongly influence the performances of high-energy lithium metal ***,we report a new electrolyte recipe viz.a moderately concentrated electrolyte comprising of 2.4 M lithium bis(fluorosulfonyl)imide(LiFSI)in a cosolvent mixture of fluorinated ethylene carbonate(FEC)and dimethyl carbonate(DMC)with relatively high ion *** to the preferential decomposition of LiFSI and FEC,an inorganic-rich interphase with abundant Li_(2)O and LiF nanocrystals is formed on lithium metal with improved robustness and ion transfer kinetics,enabling lithium plating/stripping with an extremely low overpotential of~8 mV and the average CE of 97%.When tested in Li||LiFePO_(4) cell,this electrolyte provides long-term cycling with a capacity retention of 98.3%after 1000 cycles at 1 C and an excellent rate performance of 20 C,as well as an areal capacity of 1.35 mA h cm^(-2)at the cathode areal loading of 9 mg cm^(-2).Moreover,the Li||LiFePO_(4) cell exhibits excellent wide-temperature performances(-40~60℃),including long-term cycling stability over 2600 cycles without visible capacity fading at 0℃,as well as extremely high average CEs of 99.6%and 99.8% over 400 cycles under-20℃ and 45℃.

关键词： Moderately concentrated electrolyte Wide temperature range LiFePO_(4)cathode Lithium metal battery Solid electrolyte interphase

Effects of fertilization and container-type on nutrient uptake and utilization by four subtropical tree seedlings

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Journal of Forestry Research 2020年第4期31卷 1201-1213页

作者： Xiuli chu Xiuhua Wang Dongbei Zhang Xiaolin wu Zhichun Zhou Research Institute of Subtropical Forestry Chinese Academy of ForestryFuyang 311400ZhejiangPeople’s Republic of China Experimental Forest Farm of Qingyuan County Zhejiang ProvinceQingyuan 323800ZhejiangPeople’s Republic of China

Seedling quality is important for subtropical tree species endangered by the degradation of natural habitats in southern *** present,the cultural regime for raising these seedlings involving fertilizer levels and size of container is not *** this study,seedlings of three endangered species,red-seed tree(Ormosia hosiei),Zhejiang phoebe(Phoebe chekian gensis),and Zhejiang camphor(Cinnamomum japonicum)were evaluated along with red-bark oak(Cyclobalanopsis gilva)as a reference,a species which is not *** were raised in 2.8,3.6,5.1,and 6.3 L containers and fertilizer applied at 1.0,2.0,3.0 and 4.0 kg *** height and leaf biomass increased in response to higher fertilizer levels while larger containers resulted in greater stem and root *** biomass of endangered species seedlings did not respond to neither *** phoebe seedlings responded to nitrogen and phosphorus uptake but red-seed tree seedlings were unaffected by any nutrient ***-bark oak seedlings had high nitrogen-use *** on the results,it is recommended using at least 5.1 L containers to culture Zhejiang phoebe and Zhejiang camphor seedlings with fertilizer at 3.0 kg ***-bark oak and red-seed tree seedlings should be cultured with 2.0 kg m-3 in smaller containers.

关键词： Anthropogenic activities Climate change Container type Vulnerable species

Identification of high oxygen-consuming substances in stormwater drainage systems illicitly connected with sewage system

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Journal of Environmental Sciences 2024年第4期138卷 132-140页

作者： Chen Xu Zuxin Xu Wenhai chu Shanshan wu Rong Xiao Lei Su State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Ministry of Education Key Laboratory of Yangtze River Water Environment Tongji UniversityShanghai 200092China Guangzhou Resource Environmental Protection Technology Co. Ltd.Guangzhou 510030China

The dissolved oxygen content in water is an important indicator for assessing the quality of the water environment,and maintaining a certain amount of dissolved oxygen is essential for the healthy development of the ecological *** a water body is anoxic,the activity of anaerobic microorganisms increases and organic matter is decomposed to produce a large number of blackening and odorizing substances,resulting in black and odorous water bodies,which is a very common and typical phenomenon in ***,there is still a relatively universal occurrence of illicitly connected stormwater and sewage pipes in the urban drainage pipe network in China,which makes oxygen-consuming substances be directly discharged into rivers through stormwater pipes and consume the dissolved oxygen in the water bodies,resulting in an oxygen deficiency of the *** induces seasonal or year-round black and stink phenomena in urban ***,identifying high oxygen-consuming substances,which lays the foundation for the subsequent removal of oxygen-consuming substances,is *** a series of comparisons of water quality indicators and analysis of organic characteristics,it was found that the oxygen consumption capacity of domestic sewage was higher than that of industrial wastewater in the selected area of this study,and the oxygen-consuming substances of domestic sewage were small molecular amino *** comparing 20 conventional free amino acids,it was found that seven of them consumed oxygen easily,and compared with chemical oxygen consumption,biological oxygen consumption was in a leading position.

关键词： urban drainage system Oxygen-consuming substances Domestic sewage Amino acid

Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： Feng Zhang Chenyang Zhang Linlin wu Wei Sun Hongliang Zhang Jianhua Chen Yong Pei Songjiang Li Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China China Railway Resource Group Co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectroscopy(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen content in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions could effectively inhibit the activation of *** addition the uV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and could promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism

数字素养对老年人主观福利的影响——基于新人力资本理论的研究视角

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山西财经大学学报 2025年第1期47卷 31-47页

作者：杨仲山初放东北财经大学统计学院

利用中国家庭追踪调查（CFPS）数据，基于新人力资本理论分析数字素养对老年人主观福利的影响。研究显示：数字素养对老年人主观福利有显著的促进作用，但对于幸福感、生活满意度、婚姻满意度和抑郁程度等主观福利的重要部分影响并不一... 详细信息

利用中国家庭追踪调查（CFPS）数据，基于新人力资本理论分析数字素养对老年人主观福利的影响。研究显示：数字素养对老年人主观福利有显著的促进作用，但对于幸福感、生活满意度、婚姻满意度和抑郁程度等主观福利的重要部分影响并不一致；数字素养可通过提升老年人的认知能力和非认知能力进而对主观福利起到正向作用；具有高严谨性、高外倾性、低宜人性的老年人更容易获得主观福利，情绪稳定的老年人更不容易抑郁。

关键词：数字素养主观福利认知能力非认知能力老龄化新人力资本大五人格生活满意度

Regulation of surface carbides on palladium nanocubes with zeolitic imidazolate frameworks for propyne selective hydrogenation

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Nano Research 2021年第5期14卷 1559-1564页

作者： Linzhong wu Mingyu chu Jin Gong Muhan Cao Yu Liu Yong Xu Institute of Functional Nano&Soft Materials(FuNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversityNo.199 Ren’ai RoadSuzhou215123China Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou510006China

The selective hydrogenation of propyne to propylene has attracted great attention in chemical industry for removing trace amount of propyne for producing polymer-grade propylene. As the state-of-the-art catalyst, Pd suffers from the disadvantage of poor propylene selectivity due to the over-hydrogenation of propylene to propane. We here demonstrate that Pd nanocubes (NCs) coated by zeolitic imidazolate frameworks (i.e., Pd NCs@ZIF-8) can serve as highly active and selective catalysts for propyne selective hydrogenation (PSH). Benefitting from the unique properties and abundant groups of ZIF-8, Pd carbide (Pd-C) is formed on the surface of Pd NCs after thermal treatment, which acts the active sites for PSH to propylene. More importantly, the content of Pd-C can be precisely controlled by altering the calcination temperature without aggregation of Pd NCs and obvious changes in the framework of ZIF-8. The formation of Pd-C on Pd NCs@ZIF-8 can strongly suppress the H2 adsorption, and thus selectively catalyze propyne to propylene. Consequently, the optimized catalyst (i.e., Pd NCs@ZIF-8-100) exhibits a propylene selectivity of 96.4% at a propyne conversion of 93.3% at 35 °C and atmospheric pressure. This work may not only provide an efficient catalyst for PSH, but also shed a new light on the catalytic application of ZIFs.

关键词： propyne selective hydrogenation Pd nanocubes zeolitic imidazolate frameworks core-shell nanostructures Pd carbide

Overview of in-situ oxygen production technologies for lunar resources

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 233-255页

作者： Youpeng Xu Sheng Pang Liangwei Cong Guoyu Qian Dong Wang Laishi Li Yusheng wu Zhi Wang College of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China CAS Key Laboratory of Green Process and Engineering National Engineering Research Center for Green Recycling of Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

The rich resources and unique environment of the Moon make it an ideal location for human expansion and the utilization of extraterrestrial ***,crucial for supporting human life on the Moon,can be extracted from lunar regolith,which is highly rich in oxygen and contains polymetallic *** oxygen and metal extraction can be achieved using existing metallurgical ***,the ample reserves of water ice on the Moon offer another means for oxygen *** paper offers a detailed overview of the leading technologies for achieving oxygen production on the Moon,drawing from an analysis of lunar resources and environmental *** delves into the principles,processes,advantages,and drawbacks of water-ice electrolysis,two-step oxygen production from lunar regolith,and one-step oxygen production from lunar *** two-step methods involve hydrogen reduction,carbothermal reduction,and hydrometallurgy,while the one-step methods encompass fluorination/chlorination,high-temperature decomposition,molten salt electrolysis,and molten regolith electrolysis(MOE).Following a thorough comparison of raw materials,equipment,technology,and economic viability,MOE is identified as the most promising approach for future in-situ oxygen production on the *** the corrosion characteristics of molten lunar regolith at high temperatures,along with the Moon's low-gravity environment,the development of inexpensive and stable inert anodes and electrolysis devices that can easily collect oxygen is critical for promoting MOE technology on the *** review significantly contributes to our understanding of in-situ oxygen production technologies on the Moon and supports upcoming lunar exploration initiatives.

关键词： lunar resources in-situ oxygen production space metallurgy molten lunar regolith electrolysis