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Controlling of coordination state of Ru_(x)N_(y) clusters for efficient oxygen reduction electrocatalysis

Nano Research 2024年第3期17卷 1035-1041页

作者： Weiyang Fu yihuan yu Tongtong Liu Yinliang Cao Zhengping Zhang Feng Wang State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Zhejiang Tianneng Hydrogen Energy Technology Co. Ltd.Huzhou 313100China

Ruthenium(Ru)is an attractive potential alternative to platinum as an electrocatalyst for the oxygen reduction reaction(ORR),in virtue of its high catalytic selectivity and relatively low *** this work,a series of well-dispersed nitrogen-coordinated Ru-clusters on carbon black(Ru_(x)N_(y)/C)were prepared by pyrolyzing different Ru-containing sandwich compounds as the Ru *** higher thermal stability of these complexed sandwich precursors(bis(1,2,3,4,5-pentamethylcyclopentadienyl)Ru(II)monomer,dichloro(p-cymene)Ru(II)dimer,and chloro(1,2,3,4,5-pentamethylcyclopentadienyl)Ru(II)tetramer)affords the control of coordinated state for the resulting Ru-clusters,in comparison of that derived from ruthenium *** the pyrolysis treatment,the Ru coordinated state in Ru_(x)N_(y)/C,with the Ru–N and Ru–Ru bonds,still showed the structural inheritance from the Ru(II)monomer,dimer,and tetramer,but using ruthenium chlorides as the Ru source resulted in the nanoscale Ru *** ORR testing exhibited that the Ru_(x)N_(y)/C sample derived from the Ru(II)tetramer(Ru_(x)N_(y)/C-T)presents the higher catalytic activity than the other obtained samples in either alkaline or acidic *** in the acidic electrolyte,Ru_(x)N_(y)/C-T shows the comparable ORR activity to that of Pt/C catalysts,and it shows the superior tolerance against methanol and *** X-ray absorption spectroscopy and density functional theory calculations demonstrate that these tetra-nuclear Ru-clusters could be the most active site due to their broadened d-orbital bands and lower energy d-band center than those of other subnano species and nanocrystals,and their favorable Yeager-type adsorption of O_(2)-molecules is also contributed to promoting O–O bond cleavage and accelerating the ORR process.

关键词： ruthenium clusters coordination environment sandwich compounds electrocatalysis oxygen reduction reaction

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基于慢性疾病轨迹模式的护理干预对冠心病伴高血压患者的应用分析

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中外医药研究 2024年第4期3卷 119-121页

作者：余亦欢江门市新会区人民医院广东江门529100

目的:探究基于慢性疾病轨迹模式的护理干预对冠心病伴高血压患者的影响.方法:选取2022年1月—2023年1月江门市新会区人民医院收治的冠心病合并高血压患者60例作为研究对象,随机分为对照组和研究组,各30例.对照组实施常规护理模式,研究... 详细信息

目的:探究基于慢性疾病轨迹模式的护理干预对冠心病伴高血压患者的影响.方法:选取2022年1月—2023年1月江门市新会区人民医院收治的冠心病合并高血压患者60例作为研究对象,随机分为对照组和研究组,各30例.对照组实施常规护理模式,研究组实施基于慢性疾病轨迹模式的护理干预.比较两组患者护理前后的血压水平、生活质量以及护理满意度.结果:护理前,两组患者收缩压、舒张压水平比较,差异无统计学意义(P>0.05);护理后,两组患者收缩压、舒张压水平均下降,研究组低于对照组,差异有统计学意义(P0.05);护理后,研究组患者生活质量评定问卷评分高于对照组,差异有统计学意义(P<0.05).研究组护理满意度高于对照组,差异有统计学意义(P=0.038).结论:对于冠心病伴高血压患者实施基于慢性疾病轨迹模式的护理干预,能够有效改善患者的血压水平,提高患者的生活质量,提高护理满意度.

关键词：慢性疾病轨迹模式冠心病高血压护理

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Engineering pluripotent stem cells with synthetic biology for regenerative medicine

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Medical Review 2024年第2期4卷 90-109页

作者： yihuan Mao Siqi Wang Jiazhen yu Wei Li State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Key Laboratory of Organ Regeneration and Reconstruction Chinese Academy of SciencesBeijingChina Beijing Institute for Stem Cell and Regenerative Medicine BeijingChina University of Chinese Academy of Sciences BeijingChina State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Key Laboratory of Organ Regeneration and Reconstruction Chinese Academy of SciencesBeijing 100101China Beijing Institute for Stem Cell and Regenerative Medicine Beijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Pluripotent stem cells(PSCs),characterized by self-renewal and capacity of differentiating into three germ layers,are the programmable building blocks of ***-derived cells and multicellular systems,particularly organoids,exhibit great potential for regenerative ***,this field is still in its infancy,partly due to limited strategies to robustly and precisely control stem cell behaviors,which are tightly regulated by inner gene regulatory networks in response to stimuli from the extracellular *** receptors and genetic circuits are powerful tools to customize the cellular sense-and-response process,suggesting their underlying roles in precise control of cell fate decision and function ***,we review the progress and challenges needed to be overcome in the fields of PSC-based cell therapy and multicellular system generation,***,we summarize several well-established synthetic biology tools and their applications in PSC ***,we highlight the challenges and perspectives of harnessing synthetic biology to PSC engineering for regenerative medicine.

关键词： pluripotent stem cell regenerative medicine PSC-based cell therapy multicellular systems synthetic biology

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Timing of transplantation of autologous bone marrow derived mesenchymal stem cells for treating myocardial infarction

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Science China(Life Sciences) 2014年第2期57卷 195-200页

作者： CHEN yihuan TENG XiaoMei CHEN WeiQian YANG JunJie YANG ZiYing yu yunSheng SHEN ZhenYa Department of Cardiovascular Surgery of the First Affiliated Hospital & Institute for Cardiovascular Science of Soochow University

It is still unclear whether the timing of intracoronary stem cell therapy affects the therapeutic response in patients with myocardial *** natural course of healing the infarction and the presence of putative homing signals within the damaged myocardium appear to favor cell engraftment during the transendothelial passage in the early days after ***,the adverse inflammatory environment,with its high oxidative stress,might be deleterious if cells are administered too early after *** we highlight several aspects of the timing of intracoronary stem cell *** results showed that transplantation of bone marrow mesenchymal stem cells at 2 4 weeks after myocardial infarction is more favorable for reduction of the scar area,inhibition of left ventricular remodeling,and recovery of heart *** injection of autologous bone marrow mesenchymal stem cells at 2 4 weeks after acute myocardial infarction is safe and does not increase the incidence of complications.

关键词： bone marrow mesenchymal stem cells(BMSCs) cell transplantation myocardial infarction

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Aberrantly high activation of a FoxM1-STMN1 axis contributes to progression and tumorigenesis in FoxMl-driven cancers

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Signal Transduction and Targeted Therapy 2021年第3期6卷 851-863页

作者： Jun Liu Jipeng Li Ke Wang Haiming Liu Jianyong Sun Xinhui Zhao Yanping yu yihuan Qiao Ye Wu Xiaofang Zhang Rui Zhang Angang Yang State Key Laboratory of Cancer Biology Department of Biochemistry and Molecular BiologyFourth Military Medical University710032 Xi'anShaanxiChina State Key Laboratory of Cancer Biology Institute of Digestive DiseasesXijing HospitalFourth Military Medical University710032 Xi'anShaanxiChina Department of Experimental Surgery Xijing HospitalFourth Military Medical University710032 Xi'anShaanxiChina School of Software Engineering Beijing Jiaotong University100044 BeijingChina Department of Thoracic Surgery Tangdu HospitalFourth Military Medical University710038 Xi'anShaanxiChina Department of Thyroid and Breast Surgery Xi'an No.3 HospitalThe Affiliated Hospital of Northwest University710018 Xi'anShaanxiChina The Second Ward of Gynecological Tumor Shaanxi Provincial Cancer Hospital710061 Xi'anShaanxiChina School of Clinical Medicine Xi'an Medical University710021 Xi'anShaanxiChina State Key Laboratory of Cancer Biology Department of ImmunologyFourth Military Medical University710032 Xi'anShaanxiChina

Fork-head box protein M1(FoxM1)is a transcriptional factor which plays critical roles in cancer development and ***,the general regulatory mechanism of FoxM1 is still ***1 is a microtubule-binding protein which can inhibit the assembly of microtubule dimer or promote depolymerization of *** was reported as a major responsive factor of paclitaxel resistance for clinical chemotherapy of tumor *** the function of abnormally high level of STMN1 and its regulation mechanism in cancer cells remain *** this study,we used public database and tissue microarrays to analyze the expression pattern of FoxM1 and STMN1 and found a strong positive correlation between FoxM1 and STMN1 in multiple types of ***-mediated FoxM1/STMN1-knockdown cell lines were established to study the function of FoxM1/STMN1 by performing cell viability assay,plate clone formation assay,soft agar assay in vitro and xenograft mouse model in *** results showed that FoxMl promotes cell proliferation by upregulating *** ChIP assay showed that FoxM1 upregulates STMN1 in a transcriptional *** analysis showed that a high level of FoxM1 and STMN1 is related to poor prognosis in solid ***,a high co-expression of FoxM1 and STMN1 has a more significant correlation with poor *** findings suggest that a general FoxMl-STMN1 axis contributes to cell proliferation and tumorigenesis in hepatocellular carcinoma,gastric cancer and colorectal *** combination of FoxM1 and STMN1 can be a more precise biomarker for prognostic prediction.

关键词： cancer chemotherapy clinical

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锂离子电池荷电状态与健康状态估计方法

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发电技术 2021年第5期42卷 537-546页

作者：李沂洹李慷余渐利兹大学电子电气工程学院英国利兹LS29JT 苏格兰电力公司英国格拉斯哥G25AD

电池储能系统是实现碳中和最重要、最有效的手段之一,其大规模应用对电池运行过程中的安全性提出了更高的要求。实时准确的电池状态估计为保障电池的安全稳定运行提供重要信息,是电池管理系统(battery management system,BMS)的一项重... 详细信息

电池储能系统是实现碳中和最重要、最有效的手段之一,其大规模应用对电池运行过程中的安全性提出了更高的要求。实时准确的电池状态估计为保障电池的安全稳定运行提供重要信息,是电池管理系统(battery management system,BMS)的一项重要功能。然而,由于复杂的操作条件和电池内部的电化学反应,很难准确地评估电池的内部状态。针对电池荷电状态(state of charge,SOC)和健康状态(state of health,SOH)这2个电池系统中的重要参数,系统回顾了当前常用的SOC和SOH估计方法,总结了各种方法的特点及其在实际应用中所面临的主要挑战,并在此基础上对电池SOC和SOH估计技术未来的发展提出展望,为电池状态估计技术的进一步研究提供参考依据。

关键词：锂离子电池储能状态估计电池管理系统(BMS)

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Effects of biochar and functional microorganisms on rice and soil in antimony mine

Effects of biochar and functional microorganisms on rice and...

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第十二届重金属污染防治技术及风险评价研讨会

作者： Wei Hu Renyan Duan Jing Bai yu Zheng yucai Luo Yaqi Zhang yihuan Du Li Yang yuxiang Lin College of Agriculture and Biology Technology Hunan University of Humanities Science and Technology

To reduce the degree of heavy metal antimony on rice,the effects of rice yield and heavy metal enrichment were studied and compared through the modification of biochar and functional *** results showed that:1) The surface area of biochar was significantly increased after modified *** addition of magnetic biochar and pure biochar could both significantly reduce the Sb enrichment of rice,while magnetic biochar could reduce the heavy metal enrichment coefficient.2) Bacillus subtilis(BS) had the best effect on rice 1000-grain weight and yield per plant,increasing by 15.38% and 10.49%,respectively,and reducing heavy metal Sb enrichment coefficient by 48.56%.3) Sequencing results of rhizosphere microorganisms showed that non-dominant bacteria had significant differences compared with CK,indicating that they would not have a significant impact on the structure of the rhizosphere microbial community,but would have a greater impact on the abundance of some microorganisms sensitive to heavy metals.4) LC-MS results showed that there were 35 different metabolites in BS vs CK,and two metabolic pathways are significantly affected.5) The effects of single application,physical adsorption and sodium alginate embedding on rice biomass and heavy metal enrichment were *** comparative analysis of rice yield and heavy metal enrichment through biochar and functional microorganisms is conducive to finding remediation materials and methods to reduce local heavy metal pollution,providing new guidance and reference plans for local ecological restoration.

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基于CiteSpace的茶黄素研究现状可视化分析

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茶叶科学 2022年第1期42卷 131-139页

作者：周宇飞周琳禹利君徐帅杨益欢湖南农业大学茶学教育部重点实验室/国家植物功能成分利用工程技术研究中心湖南长沙410128 湖南省农业科学院茶叶研究所湖南长沙410145 植物功能成分利用省部共建协同创新中心湖南长沙410128

为把握茶黄素研究的进展和热点,客观反映不同国家、作者、研究机构以及期刊在该领域的影响力,本研究运用文献计量学和CiteSpace可视化分析软件,对1964—2021年被WOS(Web of Science)数据库收录的725篇和被CNKI (China National Knowledg... 详细信息

为把握茶黄素研究的进展和热点,客观反映不同国家、作者、研究机构以及期刊在该领域的影响力,本研究运用文献计量学和CiteSpace可视化分析软件,对1964—2021年被WOS(Web of Science)数据库收录的725篇和被CNKI (China National Knowledge Infrastructure,中国知网)数据库收录的391篇茶黄素(Theaflavin/Theaflavins,TF/TFs)文献进行分析。结果表明,研究报道茶黄素最多的国家依次为中国、印度、美国和日本;日本长崎大学的Tanaka研究最为深入;与茶黄素类相关的儿茶素氧化产物研究报道最多;刘仲华、江和源、屠幼英是国内茶黄素研究的引领者;《茶叶科学》和《Food Science Technology》是茶黄素发文量最高的期刊;关键词分析显示中文文献研究侧重于茶黄素的制备分离和其对红茶品质的影响,英文文献侧重于茶黄素的药理研究,且茶黄素的制备分离及其药理功效仍为未来研究的热点。

关键词：茶黄素 CiteSpace 研究热点 WOS 中国知网可视化

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北京市某三级甲等医院急诊协同管理模式探讨

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中国病案 2017年第12期18卷 48-51页

作者：张祎欢王宇首都医科大学附属北京同仁医院北京市100730

在当今日益增长的医疗服务需求背景下,常态化的急诊医疗资源分配已远不能满足急诊就诊患者的需求,急诊医疗管理也面临着新的机遇和挑战。本文通过研究北京市某三级甲等医院急诊科现状,以协同理论作为理论支撑,深入分析地理空间与区域急... 详细信息

在当今日益增长的医疗服务需求背景下,常态化的急诊医疗资源分配已远不能满足急诊就诊患者的需求,急诊医疗管理也面临着新的机遇和挑战。本文通过研究北京市某三级甲等医院急诊科现状,以协同理论作为理论支撑,深入分析地理空间与区域急诊医疗特点,进一步提高急诊属地化管理能力和医疗服务能力。提出明确急诊发展定位、统一医疗质量标准、整合急诊医疗资源、制定学科人才规划的对策建议,为今后开展急诊管理提供一个思考路径。

关键词：急诊协同属地化管理

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杭州湾鹭科鸟类集群栖息区表层土壤的磷饱和度和磷流失风险

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湿地科学 2023年第1期21卷 104-112页

作者：赵亦欢邵学新余敏芬苑海静吴明中国林业科学研究院亚热带林业研究所浙江杭州湾湿地生态系统国家定位观测研究站浙江杭州311400 宁波市自然资源和规划局宁波市湿地研究中心浙江宁波315042

为了评估杭州湾鹭科(Ardeidae)鸟类栖息地土壤中磷元素的流失风险,在杭州湾国家湿地公园中,选择鹭科鸟类集群栖息的水杉(Metasequoia glyptostroboides)林地、女贞(Ligustrum lucidum)林地和无鹭科鸟类栖息的水杉林地、女贞林地(对照林... 详细信息

为了评估杭州湾鹭科(Ardeidae)鸟类栖息地土壤中磷元素的流失风险,在杭州湾国家湿地公园中,选择鹭科鸟类集群栖息的水杉(Metasequoia glyptostroboides)林地、女贞(Ligustrum lucidum)林地和无鹭科鸟类栖息的水杉林地、女贞林地(对照林地)布设采样地,分别于2018年11月(鹭科鸟类迁出后)、2019年5月(集群栖息且繁殖期)、2020年1月(鹭科鸟类迁入前),采集0~10 cm深度和10~20 cm深度的土壤样品,测定了土壤样品的有机碳含量、全氮含量、全磷含量、水溶性磷含量、有效磷含量、pH和电导率;采用Mehlich-3浸提法和草酸铵提取法,估算土壤磷饱和度;以土壤的磷饱和度和有效磷含量作为土壤中磷的流失风险的评估指标,评估表层土壤中磷的流失风险水平。研究结果表明,在杭州湾鹭科鸟类集群栖息的水杉林地和女贞林地,0~10 cm深度土壤的有机碳含量、全氮含量、全磷含量、水溶性磷含量、电导率都显著大于10~20 cm深度土壤,而其0~10 cm深度土壤pH却小于10~20 cm深度土壤;有鹭科鸟类集群栖息的水杉林地0~20 cm深度土壤的全磷含量和水溶性磷含量都大于无鹭科鸟类集群栖息的水杉林地,有鹭科鸟类集群栖息的女贞林地0~20 cm深度土壤的水溶性磷含量大于无鹭科鸟类集群栖息的女贞林地;有鹭科鸟类集群栖息的水杉林地0~20 cm深度土壤的磷饱和度和有效磷含量都大于无鹭科鸟类集群栖息的水杉林地,有鹭科鸟类集群栖息的女贞林地0~10 cm深度土壤的磷饱和度和有效磷含量都大于无鹭科鸟类集群栖息的女贞林地;有鹭科鸟类集群栖息的水杉林地0~20 cm深度土壤的磷饱和度和有效磷含量都明显大于有鹭科鸟类集群栖息的女贞林地;采用草酸铵提取法得到的土壤磷饱和度和土壤的有效磷含量可以作为杭州湾鹭科鸟类集群栖息地土壤中磷的流失风险评估指标;有鹭科鸟类集群栖息的水杉林地0~20 cm深度土壤中磷的流失风险大于有鹭科鸟类集群栖息的女贞林地。

关键词：土壤磷饱和度磷元素流失风险鹭科鸟类栖息地杭州湾

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