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Microstructure and shear properties evolution of Mn-doped SAC solder joint under isothermal aging

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Journal of Iron and Steel Research International 2023年第8期30卷 1650-1660页

作者： Cheng-ming Li Shu-jin Chen shan-shan cai Ju-bo Peng Xiao-jing wang Ying-wu wang School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina R&D Center Yunnan Tin Group(Holding)Co.Ltd.Kunming 650000YunnanChina Modern School of Engineering Yunnan UniversityKunming 650091YunnanChina

The effects of Mn addition(0.005,0.01,0.03,0.05,and 0.07 wt.%)on microstructure,shear mechanical behavior,and interfacial thermal stabilities of SAC305 joints were investigated under isothermal aging temperatures of 170 C with different aging time(0,250,500,and 750 h).It is found that Mn addition can increase fracture energy of joints without decreasing the shear *** the microstructures have transformed from the eutectic net-like structure in SAC305 solder joints into the structures based onβ-Sn matrix with intermetallic compounds(IMCs)*** doping 0.07 wt.%Mn,the Cu_(6)Sn_(5) growth along the SAC305/Cu interface during thermal aging can be inhibited to some *** isothermal aging at 170°C,the maximum shear force of solder joint decreases continuously with aging time increasing,while the fracture energy rises first and then decreases,reaching the maximum at 500 h compared by that with the microstructure ***_(3)Sn growth between Cu_(3)Sn_(5)/Cu interface has been retarded most at the aging time of 250 h with 0.07 wt.%Mn-doped *** the aging time prolonging,the inhibition effect of Mn on CusSn IMC layer becomes *** strengthening effect of Mn can be explained by precipitation strengthening,and its mechanical behavior can be predicted by particle strengthening model proposed by Orowan.

关键词： SAC305 solder Mn doping Shear mechanical behavior Isothermal aging Interfacial intermetallic compound

A five-component one-pot synthesis of phosphatidylinositol pentamannoside(PIM_5)

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Chinese Chemical Letters 2018年第9期29卷 1340-1342页

作者： Dong wang De-cai Xiong Xin-shan Ye State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University

A practical and efficient synthesis of phosphatidylinositol pentamannoside （PIM5） was achieved based on a five-component one-pot sequential glycosylation protocol with exclusive regio- and stereo-selectivity. Two regioselective sequential glycosylations on inositol and p-tolyl thioglycosides as the sole type of building blocks made this protocol to avoid the tedious protective group manipulations. This synthetic strategy provides access to other important glycolipids with similar structures.

关键词： Phosphatidylinositol pentamannoside Glycosylation Preactivation One-pot synthesis Thioglycoside

河南部分地区奶牛肠道纤毛虫感染情况及分子鉴定

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动物医学进展 2025年第1期46卷 135-140页

作者：丰山旺冯彩彩徐啊慧赵立卓胡苏辉王天奇闫文朝河南科技大学动物科技学院河南洛阳471023

为了明确奶牛肠道纤毛虫的感染情况及其人兽共患风险,从河南省不同地区8个集约化奶牛场中采集462份新鲜粪样,采用粪便直接涂片法镜检和基于18S rDNA和ITS1-5.8S rDNA-ITS2序列对样品中纤毛虫感染情况和分子特性进行了鉴定。结果显示,奶... 详细信息

为了明确奶牛肠道纤毛虫的感染情况及其人兽共患风险,从河南省不同地区8个集约化奶牛场中采集462份新鲜粪样,采用粪便直接涂片法镜检和基于18S rDNA和ITS1-5.8S rDNA-ITS2序列对样品中纤毛虫感染情况和分子特性进行了鉴定。结果显示,奶牛粪便中存在有槽巴克斯顿纤毛虫和结肠小袋纤毛虫,其中有槽巴克斯顿纤毛虫感染率为29.9%,成年牛感染率显著高于其他年龄段奶牛(P0.05),8份样品为有槽巴克斯顿纤毛虫和结肠小袋纤毛虫混合感染。未从奶牛粪便中检出瘤胃内纤毛虫,说明奶牛瘤胃内的共生纤毛虫不随粪便排出体外。研究结果为集约化奶牛场纤毛虫病的防控提供了重要的基础数据。

关键词：奶牛有槽巴克斯顿纤毛虫结肠小袋纤毛虫瘤胃内纤毛虫分子鉴定

A self-adaptive inorganic in-situ separator by particle crosslinking for nonflammable lithium-ion batteries

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Journal of Energy Chemistry 2025年第1期 469-480页

作者： Jiarui Yang Jiuzhou Liu Wenrui cai Ziyu Zhao shan wang Lu He shanshan Lv Zhiwei Zhu Zhongfeng Ji Guojiang Wen Hua Li Yuanming Zhai Xuewei Fu Wei Yang Yu wang College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University

All-safe liquid-state lithium-ion batteries(ASLS-LIBs) is of great interest as they can potentially combine the safety of all-solid-state batteries with the high performance and low manufacturing cost of traditional liquid-state LIBs. However, the practical success of ASLS-LIBs is bottlenecked by the lack of advanced separator technology that can simultaneously realize high performances in puncturing-tolerability,fire-resistance, and importantly, wetting-capability with non-flammable liquid-electrolytes. Here, we propose a concept of inorganic in-situ separator(IISS) by hybrid-sol physical crosslinking directly onto the electrode surface to address the above challenges. Particularly, the hybrid-sol is designed with silica nanoparticles as the building block and poly(vinylidene difluoride) nanoparticles as the crosslinking agent. The critical factors for controlling the IISS microstructures and properties have been systematically investigated. The advantages of the IISS have been confirmed by its fast wetting with various fireresistant liquid-electrolytes, customizable thickness and porous structures, robust interface with planar or three-dimensional(3D)-structured electrodes, and importantly, unexpected self-adaptability against puncturing. Enabled by the above merits, a fire-resistant ASLS-LIB is successfully assembled and demonstrated with stable electrochemical performance. This sol-crosslinked IISS may open an avenue for the studies on the next-generation separator technology, cell assembling, solid electrolyte processing as well as non-flammable secondary batteries.

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Dissecting the cell microenvironment of ovarian endometrioma through single-cell RNA sequencing

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Science China Life Sciences 2025年第1期 116-129页

作者： Jiangpeng Wu Siyu Xia Wenting Ye Yan Sun Jing cai Fubing Yu Haiping Wen Xiuwei Yi Taikang Li Mingwei Chen Jiayun Chen Ge Song Chuanbin Yang Yali Song Jigang wang Department of Reproductive Medicine Dongguan Maternal and Child Health Care Hospital Department of Urology and Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalSouthern University of Science and Technology State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs Artemisinin Research Centerand Institute of Chinese Materia MedicaChina Academy of Chinese Medical Sciences Reproductive Medicine Center Foshan Women and Children Hospital State Key Laboratory of Antiviral Drugs School of PharmacyHenan University

Ovarian endometrioma（OE）, also known as “chocolate cysts,” is a cystic mass that develops in the ovaries due to endometriosis and is a common gynecological condition characterized by the growth of endometrial tissue outside the uterus, leading to symptoms such as dysmenorrhea, pelvic pain, and infertility. However, the precise molecular and cellular mechanisms driving this pathophysiology remain largely unknown, posing challenges for diagnosis and treatment. Here, we employed integrated single-cell transcriptomic profiling of over 52,000 individual cells from endometrial tissues of OE patients and healthy donors and identified twelve major cell populations. We identified notable alterations in cell type-specific proportions and molecular signatures associated with OE. Notably, the activation of IGFBP5+macrophages with pro-inflammatory properties, NK cell exhaustion, and aberrant proliferation of IQCG+and KLF2+epithelium are key features and may be the potential mechanisms underlying the pathogenesis of OE. Collectively, our data contribute to a better understanding of OE at the single cell level and may pave the way for the development of novel therapeutic strategies.

关键词： ovary high-throughput sequencing transcriptomics gene expression analysis ligand-receptor analysis

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Pollution level and human health risk assessment of some pesticides and polychlorinated biphenyls in Nantong of Southeast China

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Journal of Environmental Sciences 2012年第10期24卷 1854-1860页

作者： Na wang Li Yi Lili Shi Deyang Kong Daoji cai Donghua wang Zhengjun shan Nanjing Institute of Environmental Science Ministry of Environmental Protection of ChinaNanjing 210042China Key Laboratory of Pesticide Environmental Assessment and Pollution Control Ministry of Environmental Protection of China National Major Science and Technology Program Management Office for Water Pollution Control and Treatment Beijing 100029China Tongzhou Plant Protection Station Nantong 226300China

Food consumption is one of the key exposure routes of humans to contaminants. This article evaluated the residue levels of 51 pesticides and 16 polychlorinated biphenyls （PCBs） in selected fish and food items which were commonly consumed in the Nantong area of Jiangsu Province, Southeast China. The 51 pesticides and 16 PCBs were analyzed by highly sensitive gas chromatography- tandem mass spectrometry （GC-MS/MS）. The results showed that organochlorine pesticides such as dichlorodiphenyltrichloroethanes （DDTs）, hexachlorocyclohexanes （I-ICHs）, hexachlorobenzene （HCB） and mirex and other pesticides including chlorpyrifos, pyrethroid pesticides, metolachlor, pyridaben and trifluralin were frequently detected in the samples, which was consistent with the accumulation level and characteristics of these toxic chemicals in human adipose tissue of people living in Nantong. Meanwhile, correlation of the residue level of toxic chemicals with their physical chemical properties and historic use pattern in Nantong area was observed. Combined with dietary survey results at the same sampling locations, human health risk assessment of ingestion through the dietary route was performed. The results suggested that the non-cancer risks of the chemicals investigated can be considered negligible in the Nantong area, however, the cancer risks from lifetime dietary exposure to DDTs and HCB have exceeded the acceptable levels.

关键词： pesticides PCBs human health risk assessment dietary intake Nantong

Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment

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Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： Zhao-Jun Zhang Wen-Wei wang Jing-Shui Zhen Bo-Cheng Li De-Cheng cai Yang-Yang Du Hui Huang Offshore Oil Engineering Co.Ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer(GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs,and a calculation method based on the conjugate beam method was *** composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab *** methods,epoxy resin bonding,and stud connection,were used to connect the composite slabs with the steel *** experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process:concrete cracking and steel bar yielding at the internal *** contrast,the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the concrete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced compressive failure of concrete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.

关键词： Moment redistribution GFRP-concrete composite slabs bending moment experimental study analysis model

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联合研究基金项目管理信息系统研究与实现

水电能源科学 2010年第1期28卷 1-5页

作者：周建中曾致远罗志猛郭佳蔡一彭杉王赢华中科技大学水电与数字化工程学院湖北武汉430074

针对以雅砻江为代表的我国西南地区流域水电开发中面临的重大学科与关键技术问题,结合联合研究基金项目管理特点,探讨了以项目成果量化指标为依据的绩效评估方法;围绕雅砻江水电开发联合研究基金信息系统的设计与开发,提出了管理信息系... 详细信息

针对以雅砻江为代表的我国西南地区流域水电开发中面临的重大学科与关键技术问题,结合联合研究基金项目管理特点,探讨了以项目成果量化指标为依据的绩效评估方法;围绕雅砻江水电开发联合研究基金信息系统的设计与开发,提出了管理信息系统的功能需求,设计并实现了联合基金管理信息系统复杂拓扑与逻辑架构。

关键词：联合基金项目管理信息系统绩效评估

Failure mechanism of full-size concrete filled steel circle and square tubes under uniaxial compression

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Science China(Technological Sciences) 2015年第10期58卷 1638-1647页

作者： cai JingMing PAN JinLong shan QiFeng Key Laboratory of Concrete and Pre-stressed Concrete Structures of Ministry of Education Southeast University

In this paper, the failure mechanisms of full-size concrete filled steel tubes(CFST) under uniaxial compression were investigated with nonlinear finite element method. Existing experimental results were employed to verify the validity of the finite element models of CFST specimens. Then, the numerical analysis was further conducted to study the mechanical behaviors of full-size CFST columns with circular and square cross sections under uniaxial compression. The simulation results indicate that the distribution of the contact pressure between circular steel tube and core concrete is much more uniform than that between square steel tube and concrete, resulting in much higher confinement and more efficient interaction between steel tube and core concrete in circular CFST columns, as well as ultimate load capacity and ultimate displacement. Extensive parametric analysis was also conducted to examine the effect of various parameters on the uniaxial compression behaviors of circular and square CFST columns.

关键词： CFST uniaxial compression finite element analysis interaction mechanism