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Journal of Materiomics 2022年第5期8卷 1001-1008页

作者： Xiaoyang Wang Chun Li Qihan Zhou Mingshen Li Mushi Zheng Junlei Qi xiaoqing si Jian Cao State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001China

One of the critical challenges for the protonic ceramic fuel cell stack is sealing electrolytes and interconnects.However,the traditional AgeCuO sealant will aggravate the oxidation along the interconnect surface and result in brittle compound layers at the BaZr_(0.1)Ce_(0.7)Y_(0.1)Yb_(0.1)O_(3-δ)(BZCYYb)electrolyte interface.The present work demonstrates that a silver particle interlayer with high dislocation density can be adopted to join BZCYYb electrolyte to the interconnect(AIsi 441 stainless)in air instead of traditional AgeCuO sealant.Elevating temperatures result in a sufficient bonding at the Ag/BZCYYb interface,and a defect-free joint is obtained at 950℃.Atomic bonding at Ag/BZCYYb interface is confirmed by TEM.Also,a dense and thin oxide layer(2-3 μm)is formed along the AIsi 441 interface.Ag particles in the interlayer provide the main driving force for the sintering joining.The massive dislocations promote the recovery and recrystallization of the Ag interlayer,as well as the interdiffusion of BZCYYb/Ag.After aging in the wet oxidizing atmosphere at 600℃ for 300 h,joints remain intact and dense,indicating superior oxidation resistance and aging performance.Besides,the joint shear strength(25.3 MPa)is 59%higher than that of the joint brazed by traditional AgeCuO.

关键词： BaZr_(0.1)Ce_(0.7)Y_(0.1)Yb_(0.1)O_(3-δ) Protonic ceramic fuel cells Ag particle interlayer Oxidation AIsi 441

Residual stress distribution as a function of depth in graphite/copper brazing joints via X-ray diffraction

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Journal of Materials Science & Technology 2019年第11期35卷 2470-2476页

作者： Chun Li xiaoqing si Jian Cao Junlei Qi Zhibo Dong Jicai Feng State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology

The residual stress distributions as a function of depth in three different graphite/copper brazing joints:with no interlayer,with a copper interlayer and with a niobium interlayer are measured via X-ray diffraction by transmission geometry.The residual stress in all the joints is found to be generally compressive and increasing from the surface to the interface.Copper and niobium interlayers are both effective in alleviating the residual stress in the joint and the stress value in the joint with a niobium interlayer appearing to be the lowest.The strength of the joint is demonstrated to be closely related to the residual stress and the fracture position of the joint corresponds well with the highest residual stress.

关键词： Brazing Residual stress XRD Graphite Copper

Bifunctional Electrocatalysts Based on Mo-Doped NiCoP Nanosheet Arrays for Overall Water Splitting

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Nano-Micro Letters 2019年第4期11卷 7-17页

作者： Jinghuang Lin Yaotian Yan Chun Li xiaoqing si Haohan Wang Junlei Qi Jian Cao Zhengxiang Zhong Weidong Fei Jicai Feng State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

Rational design of efficient bifunctional electrocatalysts is highly imperative but still a challenge for overall water splitting.Herein,we construct novel freestanding Mo-doped NiCoP nanosheet arrays by the hydrothermal and phosphation processes,serving as bifunctional electrocatalysts for overall water splitting.Notably,Mo doping could effectively modulate the electronic structure of NiCoP,leading to the increased electroactive site and improved intrinsic activity of each site.Furthermore,an electrochemical activation strategy is proposed to form Mo-doped(Ni,Co)OOH to fully boost the electrocatalytic activities for oxygen evolution reaction.Benefiting from the unique freestanding structure and Mo doping,Mo-doped NiCoP and(Ni,Co)OOH show the remarkable electrochemical performances,which are competitive among current researches.In addition,an overall water splitting device assembled by both electrodes only requires a cell voltage of 1.61 V to reach a current density of 10 mA cm?2.Therefore,this work opens up new avenues for designing nonprecious bifunctional electrocatalysts by Mo doping and in situ electrochemical activation.

关键词： Water splitting Bifunctional electrocatalyst Electronic structure Freestanding Metal phosphides

浙江钱江源-百山祖国家公园庆元片区叶附生苔多样性及其时空变化

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生物多样性 2024年第4期32卷 13-22页

作者：吴琪张晓青杨雨婷周艺博马毅许大明斯幸峰王健华东师范大学生命科学学院上海200241 丽水学院生态学院浙江丽水323000 钱江源-百山祖国家公园龙泉保护中心浙江丽水323000 钱江源-百山祖国家公园庆元保护中心浙江丽水323000 华东师范大学生态与环境科学学院上海200241 上海崇明生态研究院上海202162

叶附生苔是苔藓植物中特有率最高的一个类群,特殊的生理生态特性使其对气候变化及人为干扰极为敏感,成为苔藓植物中最需要关注和保护的一个类群。为了解叶附生苔物种多样性及组成随时间变化的规律,我们以钱江源-百山祖国家公园庆元片区... 详细信息

叶附生苔是苔藓植物中特有率最高的一个类群,特殊的生理生态特性使其对气候变化及人为干扰极为敏感,成为苔藓植物中最需要关注和保护的一个类群。为了解叶附生苔物种多样性及组成随时间变化的规律,我们以钱江源-百山祖国家公园庆元片区为研究对象,针对该区域内有叶附生苔历史调查记录且物种较为丰富的3个保护点(百山祖、十九源、五岭坑)进行叶附生苔类植物调查,比较并分析这3个保护点叶附生苔类植物的物种丰富度、分类β多样性及功能β多样性在时间(1990–2020年)和空间两个维度上的变化。结果表明,该片区共有叶附生苔类植物4科10属31种。与历史数据相比,本次调查新增叶附生苔7种,但有14种未采集到。在所调查的3个保护点中,仅五岭坑的物种数上升,百山祖和十九源的物种数均下降。30年来,各保护点的叶附生苔总的功能丰富度都呈下降趋势,百山祖的物种分类β多样性及功能β多样性在3个保护点中最高;物种分类β多样性主要是由周转组分构成,相反,功能β多样性主要是由嵌套组分构成。与30年前相比,3个保护点之间的物种分类β多样性及功能β多样性均呈上升趋势,表明物种异质化现象有增加的趋势。鉴于叶附生苔物种组成随时间的明显变化,以及不同地区之间物种组成差异随时间的加剧情况,建议在我国其他叶附生苔分布中心开展类似的调查和比较研究,以期及时更新物种名录,同时结合国家公园的建设契机,加强对叶附生苔不同分布点之间的联通保护。

关键词：气候变化物种分类β多样性物种功能β多样性生物异质化生物均质化

地榆皂苷Ⅰ调控IGFL2-AS1/miR-138-5p抑制卵巢癌细胞增殖、侵袭和迁移

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中草药 2024年第4期55卷 1248-1254页

作者：许运巧刚小清李金锋驻马店市中心医院妇产科河南驻马店463000 河南省人民医院妇产科河南郑州450000

目的探讨地榆皂苷Ⅰ对卵巢癌细胞增殖、侵袭和迁移的影响及分子机制。方法人卵巢癌A2780细胞分别用7.5、15.0、30.0μmol/L的地榆皂苷Ⅰ处理,同时设置si-NC组、si-IGFL2-AS1组、地榆皂苷Ⅰ+pc DNA-IGFL2-AS1组、地榆皂苷Ⅰ+pcDNA组;MT... 详细信息

目的探讨地榆皂苷Ⅰ对卵巢癌细胞增殖、侵袭和迁移的影响及分子机制。方法人卵巢癌A2780细胞分别用7.5、15.0、30.0μmol/L的地榆皂苷Ⅰ处理,同时设置si-NC组、si-IGFL2-AS1组、地榆皂苷Ⅰ+pc DNA-IGFL2-AS1组、地榆皂苷Ⅰ+pcDNA组;MTT检测细胞增殖抑制率;克隆形成实验检测细胞克隆形成数;Transwell法检测迁移和侵袭细胞数;Western blotting法检测E-钙黏蛋白(E-cadherin)和N-钙黏蛋白(N-cadherin)表达;双荧光素酶报告实验检测IGFL2-AS1和miR-138-5p的靶向关系。结果不同浓度的地榆皂苷Ⅰ处理A2780细胞后,细胞增殖、迁移和侵袭能力显著减弱(P<0.05),Ecadherin和miR-138-5p表达上调(P<0.05),N-cadherin和IGFL2-AS1表达下调(P<0.05),呈剂量相关性。下调IGFL2-AS1抑制A2780增殖、迁移及侵袭(P<0.05)。IGFL2-AS1靶向调控miR-138-5p,过表达IGFL2-AS1可减弱地榆皂苷Ⅰ对A2780细胞增殖、迁移和侵袭的作用(P<0.05)。结论地榆皂苷Ⅰ通过调控IGFL2-AS1/miR-138-5p抑制卵巢癌细胞增殖、侵袭和迁移。

关键词：地榆皂苷Ⅰ IGFL2-AS1 miR-138-5p 卵巢癌增殖侵袭迁移

基于环氧基POSS改性的低介电纳米多孔复合材料:微观结构对介电性能的影响

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复合材料学报 2024年第2期41卷 702-711页

作者：李晓丹刘小清何瑞刘宏宇王锋孟诗云重庆工商大学环境与资源学院催化与环境新材料重庆市重点实验室重庆400067

随着超大规模集成电路的迅速发展,微型集成化高密度半导体元件迫切需要低介电材料。本文合成了具有笼型结构的环氧基倍半硅氧烷(EOVS),并与环氧树脂E51共混得到纳米多孔EOVS/E51复合材料。改性后,EOVS在E51基体中均匀分散。随着EOVS的增... 详细信息

随着超大规模集成电路的迅速发展,微型集成化高密度半导体元件迫切需要低介电材料。本文合成了具有笼型结构的环氧基倍半硅氧烷(EOVS),并与环氧树脂E51共混得到纳米多孔EOVS/E51复合材料。改性后,EOVS在E51基体中均匀分散。随着EOVS的增多,其笼型结构引入的纳米孔隙使EOVS/E51复合材料的自由体积增大,单位体积内极化分子的密度降低,EOVS含量为15wt%时,介电常数由4.21下降至2.51(1 MHz)。但是,EOVS上的环氧基团提供了新的反应位点,EOVS/E51复合体系的交联密度随EOVS增多而增大,EOVS含量达20wt%时,复合材料的自由体积减小,介电常数转而增大。此外,EOVS中si-O-si键的疏水性使复合材料的耐湿性增强,而无机骨架的热稳定性及纳米增韧效应导致复合材料的耐热性和抗冲性能明显提升,在微电子领域应用前景广阔。

关键词：环氧基POSS 环氧树脂复合材料介电常数自由体积交联密度

Review on application of phase change materials in asphalt pavement

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Journal of Traffic and Transportation Engineering(English Edition) 2023年第2期10卷 185-229页

作者： xiaoqing Wang Biao Ma siqi Li Wei si Kun Wei Hongfei Zhang Xueyan Zhou Yunfeng Fang Xingxiang Kang Wenshuo Shi Key Laboratory for Special Area Highway Engineering of Ministry of Education Chang’an UniversityXi’an 710064China School of Modern Post Xi’an University of Posts&TelecommunicationsXi’an 710064China School of Transportation Southeast UniversityNanjing 211189China Dongtai Highway Development Center Dongtai 224200China

Phase change materials(PCMs)can regulate the temperature in asphalt pavement and minimize temperature-related problems,such as rutting and thermal cracking,because of their ability to store and release latent heat.Suitable PCMs can also enable additional road surface functions,such as snow melting ability,freeze-thaw cycle resistance,and heat island reduction.These functions are helpful in achieving intelligent,green,and sustainable transportation systems.Although the research on PCMs for asphalt pavement has been carried out for more than 10 years,a systematic material system and mature application technology have not yet been formed.The main reasons for restricting the development of this technology include the lack of suitability between the PCMs and asphalt pavement,the quantitative characterization of phase change temperature regulation property,and the evaluation of the effect of phase change energy storage on improving pavement performance.Although the published review has made a comprehensive summary of the existing research,it has yet to identify the key restricting the development of this technology and carry out a review and discussion based on it.To grasp the development status of the application of PCMs in asphalt pavement,sort out the development needs and break through the technical barriers,this study systematically summarizes the preparation and performance of PCMs for asphalt pavement,compares the performance and evaluation methods of asphalt mixtures with different PCMs,and summarizes the numerical simulation methods of phase change asphalt mixtures.Finally,this study presents potential approaches to address critical technical issues and discusses possible future research.

关键词： Asphalt mixture Phase change material Road performance Thermal performance Thermoregulation

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老年挪威疥一例

中国麻风皮肤病杂志 2024年第7期40卷 511-513页

作者：周士琪张永飞邓晓彤袁现政司晓青山东第二医科大学临床医学院山东潍坊261000 山东第一医科大学第一附属医院皮肤科山东济南250013 山东第一医科大学临床医学院山东济南250117 济宁医学院临床医学院山东济宁272067

挪威疥是疥疮中罕见且严重的一种变异类型,本文报道一例老年男性挪威疥。患者一般状况差,合并帕金森和糖尿病。患者全身散在红斑、丘疹,伴弥漫性厚层白色鳞屑、结痂2个月余。取皮屑镜检见疥螨,诊断为挪威疥。

关键词：挪威疥疥疮

Bioinformatics analysis of human kallikrein 5 (KLK5) expression in metaplastic triple‐negative breast cancer

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Cancer Innovation 2023年第5期2卷 376-390页

作者： Yue Song Guiying Bai xiaoqing Li Liyan Zhou Yiran si Xiaohui Liu Yilin Deng Yehui Shi Department of Phase I Clinical Trial Tianjin Medical University Cancer Institute and HospitalTianjinChina Medical Oncology Department of Breast Cancer Tianjin Medical University Cancer Institute and HospitalTianjinChina National Clinical Research Center for Cancer TianjinChina

Background:Metaplastic breast carcinoma(MBC)is a rare breast cancer subtype;most cases are triple‐negative breast cancers(TNBCs)and are poorly responsive to conventional systemic therapy.Few potential diagnostic and prognostic markers for distinguishing between metaplastic TNBC and nonmetaplastic TNBC have been discovered.We performed bioinformatic analysis to explore the underlying mechanism by which metaplastic TNBC differs from nonmetaplastic TNBC and provides potential pathogenic genes of metaplastic TNBC.Methods:Differentially expressed genes(DEGs)in metaplastic tumors and nonmetaplastic tumors from TNBC patients were screened using GSE165407.The GSE76275 data set and The Cancer Genome Atlas(TCGA)database were used to screen DEGs in TNBC and non‐TNBC.Metascape and DAVID were used for the Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analysis and Gene Ontology(GO)analysis of DEGs.Online databases,including UALCAN,GEPIA,HPA,Breast Cancer Gene‐Expression Miner,and quantitative PCR and western blot,were used to examine KLK5 messenger RNA and protein expression in breast cancer.Analysis of KLK5‑associated genes was performed with TCGA data,and the LinkedOmics database was used to detect the genes co‐expressed with KLK5.STRING(Search Tool for the Retrieval of Interacting Genes)and Cytoscape were used to screen for hub genes.Kaplan‑Meier plotter was used for survival analysis.Results:KLK5 was identified among the DEGs in nonmetaplastic TNBC and metaplastic TNBC.The KLK5 gene was overexpressed in nonmetaplastic TNBC but downregulated in metaplastic TNBC.KEGG and GO analyses revealed that epithelial‐to‐mesenchymal transition was a pathogenic mechanism in metaplastic TNBC and an important pathway by which KLK5 and its associated genes DSG1and DSG3 influence metaplastic TNBC progression. Prognosis analysis showedthat only low expression of KLK5 in metaplastic TNBC had clinical significance.Conclusion: Our research indicated that KLK5 may be a pivotal moleculewith a key role in the mechanism of tumorigenesis i

关键词： bioinformatics analysis differentially expressed genes EMT KLK5 metaplastic breast carcinoma

诱导换羽过程中光照程序对蛋鸡卵巢功能重塑的辅助作用

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家畜生态学报 2024年第4期45卷 38-46页

作者：张晓冉王鹏宇张军耿晓晴赵鑫龙张怡辉司素锦李东华田亚东蒋瑞瑞河南农业大学动物科技学院河南郑州450046

家禽是长日照动物,科学合理的光照程序对蛋鸡的生长发育、性成熟、开产日龄、产蛋高峰等都有显著影响,在诱导换羽的禁食和恢复采食的不同阶段,设定相应的光照程序对于提升诱导换羽效果具有重要的意义。该研究选用529日龄体重相近、产蛋... 详细信息

家禽是长日照动物,科学合理的光照程序对蛋鸡的生长发育、性成熟、开产日龄、产蛋高峰等都有显著影响,在诱导换羽的禁食和恢复采食的不同阶段,设定相应的光照程序对于提升诱导换羽效果具有重要的意义。该研究选用529日龄体重相近、产蛋率约为60%的贵妃蛋鸡为试验材料,根据禁食诱导换羽的不同时期,将光照制度的变化分4个阶段,并于第Ⅰ阶段(16 h L/8 h D,禁食前)、第Ⅱ阶段(8 h L/16 h D持续3 d)、第Ⅲ阶段(10 h L/14 h D持续13 d)的最后1天(F 0、F 3、F 16)和第Ⅳ阶段(逐渐增加光照0.5 h/d至恢复到16 h L/8 h D)的第6、32天(R 6、R 32)5个不同时期屠宰采样,通过卵泡数量、卵巢抗氧化指标、KIT-PI3K-PTEN-AKT信号通路和GDF9基因表达量等来探究光照程序在禁食诱导换羽过程的作用。结果表明,缩短光照蛋鸡血清中生殖激素FSH、LH、E 2和P 4的水平降低(P0.05)的数量增多;逐渐恢复光照时长过程中KIT和PI3K处于持续高表达状态(P0.05),且血清中生殖激素水平和卵巢抗氧化水平恢复到初始状态,但整体卵泡数量有所上升。该结果表明在禁食换羽过程中科学合理的光照程序对卵巢功能的重塑具有辅助作用。

关键词：光照程序诱导换羽卵泡发育产蛋率蛋鸡