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Mo-doped cop nanoparticles anchored on porous co-N-c framework as an efficient bifunctional electrocatalyst for pH-universal water splitting

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Journal of Materials Science & Technology 2023年第35期166卷 58-66页

作者： Guohua Li Fan Yang Sai che Hongchen Liu Neng chen Jinxiu Qian chunhui Yu Bo jiang Mengxi Liu Yongfeng Li State Key Laboratory of Heavy Oil processing China University of PetroleumBeijing 102249China

Designing highly active and stable noble-metal-free electrocatalysts for water splitting over a wide pH range is critical yet remains significantly *** this work,Mo-doped cop nanoparticles(Mo-cop)supported and enwrapped by porous single-atomic-co doped carbon framework(co-N-c)were designed and prepared by a simple one-pot pyrolysis *** Mo-cop/co-N-c electrocatalyst exhibits superior performance with low overpotentials of only 45 mV for hydrogen evolution reaction(HER)and 201 mV for oxygen evolution reaction(OER)in 1 M KOH at 10 mA cm^(-2)current *** excellent catalytic activity can be ascribed to enhanced intrinsic activity,large surface area,and highly exposed active ***,an extremely small overpotential of only 250 mV is required for a large current density of 500 mA cm^(-2)in HER,which exceeds the performance of benchmark 10%pt/***,Mo-cop/co-N-c also exhibits superior HER performance in acidic and neutral mediums,with overpotentials of only 41 and 98 mV in 0.5 M H_(2)SO_(4),and 1 M pBS,respectively,thus achieving efficient water splitting at a wide pH *** long-term stabilities are guaranteed with no significant decline of catalytic activities for more than 24 h in all electrolytes,which can be ascribed to the carbon layer encapsulation ***-ally,in overall water splitting,the electrocatalytic cell consisting of the as-synthesized Mo-cop/co-N-c only requires a cell voltage of 1.611 V at 100 mA cm^(-2)with excellent stability,exceeding that of the benchmark pt/c||RuO(2) couple(1.645 V at 100 mA cm^(-2)).This work not only presents a highly efficient electrocatalyst for pH-universal water splitting but also provides a new perspective for the design and construction of transition metal catalysts with excellent stability.

关键词： cobalt phosphide Mo doping Single atomic catalyst Water splitting pH-universal

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NSD1基因变异致Sotos综合征诊断及文献复习

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中国计划生育学杂志 2024年第8期32卷 1844-1846页

作者：屈晓羽江南静朱书瑶曾兰陈艾四川省妇幼保健院成都610031

目的:探讨我国经基因测序诊断Sotos综合征患者基因型与表型之间联系。方法:回顾性分析1例经家系全外显子(Trio-WES)测序诊断的Sotos综合征患儿临床资料及基因结果,通过文献复习收集符合纳入标准患者的临床资料和遗传性结果。结果:患儿4... 详细信息

目的:探讨我国经基因测序诊断Sotos综合征患者基因型与表型之间联系。方法:回顾性分析1例经家系全外显子(Trio-WES)测序诊断的Sotos综合征患儿临床资料及基因结果,通过文献复习收集符合纳入标准患者的临床资料和遗传性结果。结果:患儿4岁,身高119cm(+3.8 SD),头围52.5cm(+1.7 SD),额颞毛发稀疏,鼻梁塌陷,眼距增宽,尖下颌,自幼语言及运动发育落后伴过度生长。染色体核型分析未见异常,Trio-WES测序提示患儿“NM_022455.5(NSD1):c.4765+1 G>c”变异,该变异在人类基因数据库中未见报道,结合临床症状诊断为Sotos综合征。我国共报道NSD1基因变异的Sotos综合征患者26例,临床表型以颅面畸形,过度生长,发育落后为主要特征,遗传学结果分析以微缺失为主,新发变异常见,罕有家系遗传。结论:NSD1基因c.4765+1G>c变异可能是导致该患儿颅面畸形,过度生长,语言及运动落后的病因。对颅面畸形,过度生长伴有智力发育落后的患者因警惕Sotos综合征,Trio-WES测序有助于明确诊断。

关键词： Sotos综合征 NSD1基因外显子测序

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Management of re‐established artificial grasslands via grazing or fencing: Effects on plant and soil properties

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Grassland Research 2023年第1期2卷 69-83页

作者： Jing cao Yiping chen Yao jiang Jingshu chen Junhua Wu State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'anChina University of chinese Academy of Sciences BeijingChina Xi'an Institute for Innovative Earth Environment Research Xi'anChina

Background:Revegetation is widely used in degraded grassland ***,the responses of grassland plant and soil properties to fencing(Fc)and grazing(GZ)remain poorly understood,especially the vegetation–soil coupling coordination(c_(d))*** study explored single and interactive responses of vegetation and soil properties under Fc and GZ after ***:A field experiment with Fc and GZ treatments was conducted in Loess plateau reconstructed grassland,with degraded grassland as the control(cK).plant and soil properties and c_(d) were analyzed using the analytic hierarchy process(AHp)and principal component analysis(pcA).Results:The order of soil comprehensive evaluation(ScE)was GZ>Fc>cK,while that of vegetation comprehensive evaluation(VcE)was Fc>GZ>*** c_(d) of cK was 0.39(mild imbalance),while the values of Fc and GZ were 0.57 and 0.54,respectively(little coordination).The VcE/ScE of Fc was 1.48(soil lag type),and the values of GZ and cK were 0.69 and 0.35,respectively(vegetation lag and vegetation loss type,respectively).conclusions:Both GZ and Fc improved c_(d) and facilitated ***,degraded grasslands should be restored via moderate grazing for sustainable ecological and economic development.

关键词： degraded artificial grassland grazing and fencing revegetation vegetation-soil coupling coordination

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Atomic-resolution characterization on the structure of strontium doped barium titanate nanoparticles

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Nano Research 2021年第12期14卷 4802-4807页

作者： Haoyu jiang Jizhen Qi Dongchang Wu Wei Lu Jiahui Qian Haifeng Qu Yixiao Zhang pei Liu Xi Liu Liwei chen In-situ center for physical Sciences School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai200240China i-Lab CAS Center for Excellence in Nanoscience Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou215123China Suzhou Bao Shun Mei Technology co. Ltd.Room 305Building 1199 Jinji Lake AvenueSuzhou Industrial ParkSuzhou215123China DTU Nanolab Technical University of DenmarkFysikvejBuilding 3072800LyngbyDenmark Shanghai Nanoport Thermo Fisher Scientific Building A2517 Jinke RoadPudong DistrictShanghai201203China

Ferroelectric barium titanate nanoparticles(BTO Nps)may play critical roles in miniaturized passive electronic devices such as multi-layered ceramic *** increasing experimental and theoretical understandings on the structure of BTO and doped BTO have been developed over the past decade,the majority of the investigation was carried out in thin-film materials;therefore,the doping effect on nanoparticles remains ***,doping-induced local composition and structure fluctuation across single nanoparticles have yet to be *** this work,we use electron microscopy-based techniques including high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM),integrated differential phase contrast(iDpc)-STEM,and energy dispersive X-ray spectroscopy(EDX)mapping to reveal atomically resolved chemical and crystal structure of BTO and strontium doped BTO *** X-ray diffraction(pXRD)results indicate that the increasing strontium doping causes a structural transition from tetragonal to cubic phase,but the microscopic data validate substantial compositional and microstructural inhomogeneities in strontium doped BTO *** work provides new insights into the structure of doped BTO Nps and will facilitate the materials design for next-generation high-density nano-dielectric devices.

关键词： barium titanate nanoparticles doping effect structural transition high-angle annular dark-field scanning transmission electron microscopy integrated differential phase contrast

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石灰石粉作为矿物掺合料对机制砂混凝土力学性能及耐久性的影响

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混凝土 2024年第7期 94-98页

作者：李汪阳程磊科刘慧慧母进伟张克永任强蒋正武同济大学先进土木工程材料教育部重点实验室材料科学与工程学院上海201804 安徽省交通控股集团有限公司安徽合肥230088 贵州桥梁建设集团有限责任公司贵州贵阳550001

石灰石粉可作为机制砂细粉料或矿物掺合料两种途径掺入混凝土中,然而两种不同掺入途径对混凝土的配合比设计及其性能影响截然不同。基于我国某桥梁工程机制砂混凝土的实际应用需求与服役环境特征,通过测试不同石灰石粉掺量下的机制砂混... 详细信息

石灰石粉可作为机制砂细粉料或矿物掺合料两种途径掺入混凝土中,然而两种不同掺入途径对混凝土的配合比设计及其性能影响截然不同。基于我国某桥梁工程机制砂混凝土的实际应用需求与服役环境特征,通过测试不同石灰石粉掺量下的机制砂混凝土工作性、抗压强度与氯离子扩散系数,对石灰石粉作为单一矿物掺合料制备承台、挡土墙和索塔用机制砂混凝土的可行性进行了分析。研究结果表明:随着石粉掺量增加,机制砂混凝土的抗压强度性能呈现下降趋势,可降低水胶比以保障混凝土强度;石粉会提高c30机制砂混凝土的氯离子迁移系数,但对c50机制砂混凝土的氯离子迁移系数影响较小。初步认为石粉作为矿物掺合料用于不同类型机制砂混凝土具有可行性,更高掺量的石粉对机制砂混凝土耐久性的影响有待进一步探究。

关键词：石灰石粉机制砂混凝土矿物掺合料力学性能耐久性

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carboxymethytl pachymaram Up-Regulates Dendritic cell's Function in Hepatitis B Virus Transgenic Mice in vitro

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Wuhan University Journal of Natural Sciences 2007年第2期12卷 372-378页

作者： HOU Anji YANG Zhanqiu HUANG Jing jiang Han School of Medicine Wuhan University Wuhan 430071Hubei China

The effect ofcarboxymethytl pachymaram （ cMp ） on the function of dendritic cells（Dcs） derived from spleens of hepatitis B virus transgenic mice are studied in vitro. The phenotypes of Dcs are tested by flow cytometry （FcM）, cytokines measured by ELISA. The expression of Dcs＇ phenotypes in IdBV transgenic mice are low （cD80^＋cD11c^＋：59.12±11.53 vs 9,60±4.53, p〈0.01; cD80^＋ MHc-Ⅱ^＋： 44.86±12.31 vs 9.80±5,72, p〈0.01, normal mice vs HBV transgenic mice）, the ability of Dcs stimulating T lymphocytes proliferation decreases （0.37±0.11 vs 0.20±0,11, p〈0.05, normal mice vs HBV transgenic mice）, levels of IL-12 and IFN-y decrease whereas the level of IL-10 increases; cMp can enhance Dcs＇ ability of stimulating T lymphocytes proliferation, facilitate the secretion of IL-12 and IFNp, inhibit the secretion of IL-10, thus up regulates Dcs function. The results show a good prospective use of cMp on the treatment of chronic hepatitis B.

关键词： carboxymethytl pachymaram hepatitis B virus transgenic mice dendritic cell

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纳米c-S-H晶核对水泥浆体流变性能的影响

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新型建筑材料 2024年第2期51卷 39-43页

作者：张心源倪陈新陈稳苏昂姜骞于诚江苏省交通工程建设局江苏南京210000 江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室江苏南京211103

纳米c-S-H晶核由于对水泥早期水化的显著加速效果逐渐被广泛用作早强剂,通过流变仪测试掺纳米c-S-H晶核水泥浆体的塑性黏度、动态屈服应力、静态屈服应力和触变性,以研究纳米c-S-H晶核对水泥浆体流变性能的影响。结果表明:纳米c-S-H晶... 详细信息

纳米c-S-H晶核由于对水泥早期水化的显著加速效果逐渐被广泛用作早强剂,通过流变仪测试掺纳米c-S-H晶核水泥浆体的塑性黏度、动态屈服应力、静态屈服应力和触变性,以研究纳米c-S-H晶核对水泥浆体流变性能的影响。结果表明:纳米c-S-H晶核掺入水泥浆体后,水泥浆体塑性黏度、动态屈服应力、静态屈服应力和触变性均随之增加,掺量越大,增加越多。水灰比对水泥浆体的流变性能也具有显著影响,水灰比越小,浆体的塑性黏度、动态屈服应力、静态屈服应力和触变性越大。

关键词：纳米c-S-H晶核流变性能屈服应力触变性

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cold spray additive manufacturing of Invar 36 alloy:microstructure,thermal expansion and mechanical properties

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Journal of Materials Science & Technology 2021年第13期72卷 39-51页

作者： chaoyue chen Yingchun Xie Longtao Liu Ruixin Zhao Xiaoli Jin Shanqing Li Renzhong Huang jiang Wang Hanlin Liao Zhongming Ren State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Guangdong Academy of Science Guangdong Institute of New MaterialsNational Engineering Laboratory for Modern Materials Surface Engineering TechnologyThe Key Lab of Guangdong for Modern Surface Engineering TechnologyGuangzhou 510651China Research Institute Baoshan Iron&Steel Co.LtdShanghai 200431China IcB UMR 6303 CNRSUniv.Bourgogne Franche-ComtéUTBMF-90010 BelfortFrance

In this work,the Invar 36 alloys were manufactured using cold spray(cS)additive manufacturing *** systematic investigations were made on the microstructural evolution,thermal expansion and mechanical properties under as-sprayed(AS)and heat-treated(HT)***(X-ray diffraction)and Icp-AES(inductively coupled plasma atomic emission spectroscopy)analyses show that no phase transformation,oxidation,nor element content change have *** X-ray computed tomography(XcT)exhibited a near fully dense structure with a porosity of 0.025%in the helium-produced sample under as-sprayed condition,whereas the nitrogen-produced samples produced at 5 Mpa and 800℃show more irregular pore ***-AS sample shows a more prominent grain refinement than that of nitrogen samples due to the more extensive plastic *** post heat-treatment exhibited a promoted grain growth,inter-particle diffusion,as well as the formation of annealing ***25℃and 200℃,the nitrogen samples possessed lower cTE(coefficient of thermal expansion)values(1.53×10^(-6)/℃)compared with those produced by casting and laser additive *** He-AS samples exhibited a noticeable negative cTE value between 25℃and 200℃,which may due to the significant compressive residual stress(-272 Mpa)compensating its displacement with temperature increase during cTE *** N2-HT and He-HT Invar 36 samples present a notable balance between strength and *** conclusion,the cS technique can be considered as a potential method to produce the Invar36 component with high thermal and mechanical performance.

关键词： cold spray Additive manufacturing Invar 36 alloy coefficient of thermal expansion Tensile test

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无人舰应急处理路径规划

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信息技术 2024年第9期48卷 125-128页

作者：李兰英蒋维成周玲黄静彭欢成都理工大学工程技术学院电子信息与计算机工程系四川乐山614000

为了解决无人舰多目标应急处理中复杂的路径规划问题,提出了一种融合案例推理的蚁群算法。对无人舰应急处理历史案例的特征属性进行提取,构建案例推理知识库,采用映射规则将案例中符号值数据转化为数值型数据,使用知识进行推理计算。对... 详细信息

为了解决无人舰多目标应急处理中复杂的路径规划问题,提出了一种融合案例推理的蚁群算法。对无人舰应急处理历史案例的特征属性进行提取,构建案例推理知识库,采用映射规则将案例中符号值数据转化为数值型数据,使用知识进行推理计算。对蚁群算法进行改进,启发函数中加入事件距离,根据事发状况和各目标点情况进行推理,采用改进的蚁群算法结合案例推理对无人舰多目标应急处理的路径进行规划。实验结果表明,所提出算法在多目标应急处理中更加有效,优先处理最需要的问题,提高应急处理的效率。

关键词：应急事件案例推理蚁群算法路径规划事件距离

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超声血管指数定量、弹性模量与乳腺癌生物学特征关系及其变化的临床意义

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实用临床医药杂志 2024年第4期28卷 115-119页

作者：孙莉漪何小芳蒋媛慧华骁帆周敏苏州大学附属苏州九院/苏州市第九人民医院超声科江苏苏州215200 苏州大学附属苏州九院/苏州市第九人民医院普外科江苏苏州215200

目的探讨超声血管指数定量、弹性模量值与乳腺癌生物学特征关系及其变化的临床意义。方法选取接受新辅助化疗(NAc)治疗的103例乳腺癌患者为研究对象,分析NAc前超微血管成像(SMI)的血管指数(VI)、剪切波弹性成像(SWE)最大弹性模量值(E_(m... 详细信息

目的探讨超声血管指数定量、弹性模量值与乳腺癌生物学特征关系及其变化的临床意义。方法选取接受新辅助化疗(NAc)治疗的103例乳腺癌患者为研究对象,分析NAc前超微血管成像(SMI)的血管指数(VI)、剪切波弹性成像(SWE)最大弹性模量值(E_(max))与乳腺癌生物学特征关系。根据NAc的病理反应结果分为显著反应组、非显著反应组,比较2组NAc不同周期末VI变化率、E_(max)变化率。采用受试者工作特征(ROc)曲线分析不同周期末VI变化率、E_(max)变化率预测乳腺癌NAc病理反应。结果NAc前VI、E_(max)与乳腺癌组织分化程度、病理分期及癌组织HER-2表达有关(pc第1、2、4周期末的VI变化率和E_(max)变化率均高于非显著反应组,差异有统计学意义(pc病理反应的AUc为0.918、灵敏度为0.874、特异度为0.905,高于第1周期末VI变化率联合E_(max)变化率的AUc(0.832)、灵敏度(0.788)、特异度(0.827),也高于第4周期末VI变化率联合E_(max)变化率的AUc(0.853)、灵敏度(0.827)、特异度(0.849)。结论VI、E_(max)与乳腺癌分化程度、病理分期及癌组织HER-2表达存在关联,化疗第2周期末VI变化率联合E_(max)变化率预测乳腺癌NAc病理反应效能最优。

关键词：乳腺癌血管指数定量弹性模量生物学特征临床意义

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