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Sub-10-nm-sized Au@AuxIr1-x metal-core/alloy-shell nanoparticles as highly durable catalysts for acidic water splitting

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National Science Review 2024年第4期11卷 130-140页

作者： Huimin wang Zhe-ning Chen Yuanyuan wang dongshuang Wu Minna Cao Fanfei Sun Rong Cao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences School of Materials Science and Engineering Nanyang Technological University Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China

The absence of efficient and durable catalysts for oxygen evolution reaction（OER） is the main obstacle to hydrogen production through water splitting in an acidic ele ***,we report a controllable synthesis method of surface IrOxwith changing Au/Ir compositions by constructing a range of sub-10-nm-sized core-shell nanocatalysts composed of an Au core and AuxIr1-xalloy *** particular,Au@Au0.43Ir0.57exhibits 4.5 times higher intrinsic OER activity than that of the commercial Ir/*** X-ray-based spectroscopies,electron microscopy and density functional theory calculations revealed a balanced binding of reaction intermediates with enhanced *** water-splitting cell using a load of 0.02 mgIr/cm2of Au@Au0.43Ir0.57as both anode and cathode can reach 10 mA/cm2at 1.52 V and maintain activity for at least194 h,which is better than the cell using the commercial couple Ir/C‖Pt/C（1.63 V,0.2 h）.

关键词： controllable synthesis of surface IrOx oxygen evolution reaction acidic water splitting catalytic stability transition metal catalysts

Human 8-cell embryos enable efficient induction of disease-preventive mutations without off-target effect by cytosine base editor

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Protein & Cell 2023年第6期14卷 416-432页

作者： Yinghui Wei Meiling Zhang Jing Hu Yingsi Zhou Mingxing Xue Jianhang Yin Yuanhua Liu Hu Feng Ling Zhou Zhifang Li dongshuang wang Zhiguo Zhang Yin Zhou Hongbin Liu Ning Yao Erwei Zuo Jiazhi Hu Yanzhi Du Wen Li Chunlong Xu Hui Yang Center for Reproductive Medicine International Peace Maternity and Child Health HospitalInnovative Research Team of High-level Local Universities in ShanghaiSchool of MedicineShanghai Jiao Tong UniversityShanghai 2000301.Center for Reproductive MedicineInternational Peace Maternity and Child Health HospitalInnovative Research Team of High-level Local Universities in ShanghaiSchool of MedicineShanghai Jiao Tong UniversityShanghai 200030China Institute of Neuroscience State Key Laboratory of NeuroscienceKey Laboratory of Primate NeurobiologyCAS Center for Excellence in Brain Science and Intelligence TechnologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China Lingang Laboratory Shanghai Research Center for Brain Science and Brain-Inspired Intelligence TechnologyShanghai 200031China Center for Reproductive Medicine Ren Ji HospitalSchool of MedicineShanghai Key Laboratory for Assisted Reproduction and Reproductive GeneticsShanghai Jiao Tong UniversityShanghai 200127China The MOE Key Laboratory of Cell Proliferation and Differentiation School of Life SciencesGenome Editing Research CenterPeking UniversityBeijing 100871China Center for Reproductive Medicine Shandong UniversityJinan 250012China Center for Reproductive Medicine Anhui Provincial Maternal and Child Health HospitalHefei 230001China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518000China Reproductive Medicine Center Department of Obstetrics and Gynecologythe First Affiliated Hospital of Anhui Medical UniversityHefei 230022China

Approximately 140 million people worldwide are homozygous carriers of APOE4(ε4),a strong genetic risk factor for late onset familial and sporadic Alzheimer’s disease(AD),91%of whom will develop AD at earlier age than heterozygous carriers and *** to AD could be reduced by targeted editing of APOE4,but a technical basis for controlling the off-target effects of base editors is necessary to develop low-risk personalized gene ***,we first screened eight cytosine base editor variants at four injection stages(from 1-to 8-cell stage),and found that FNLS-YE1 variant in 8-cell embryos achieved the comparable base conversion rate(up to 100%)with the lowest bystander *** particular,80%of AD-susceptibleε4 allele copies were converted to the AD-neutralε3 allele in humanε4-carrying *** control measures combined with targeted deep sequencing,whole genome sequencing,and RNA sequencing showed no DNA or RNA off-target events in FNLS-YE1-treated human embryos or their derived stem ***,base editing with FNLS-YE1 showed no effects on embryo development to the blastocyst ***,we also demonstrated FNLS-YE1 could introduce known protective variants in human embryos to potentially reduce human susceptivity to systemic lupus erythematosus and familial *** study therefore suggests that base editing with FNLS-YE1 can efficiently and safely introduce known preventive variants in 8-cell human embryos,a potential approach for reducing human susceptibility to AD or other genetic diseases.

关键词： human embryo APOE4 disease-preventive mutations base editor

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太赫兹共振隧穿二极管探测器研究进展及应用

太赫兹科学与电子信息学报 2022年第10期20卷 991-999页

作者：王东双苏娟谭为中国工程物理研究院电子工程研究所四川绵阳621999 中国工程物理研究院微系统与太赫兹研究中心四川成都610200

太赫兹波独特的性质使其在物理学、生物学、医疗诊断、无损检测、无线通信等领域有着广阔的应用前景。共振隧穿二极管(RTD)是一种基于量子隧穿效应的半导体器件,利用其负微分电阻和直流非线性特性,可以分别实现太赫兹波的产生和探测,近... 详细信息

太赫兹波独特的性质使其在物理学、生物学、医疗诊断、无损检测、无线通信等领域有着广阔的应用前景。共振隧穿二极管(RTD)是一种基于量子隧穿效应的半导体器件,利用其负微分电阻和直流非线性特性,可以分别实现太赫兹波的产生和探测,近年来获得越来越多的关注。基于RTD的太赫兹探测器具有可室温工作、体积小、易集成、灵敏度高等特点,使其在未来短距离、超高速的太赫兹无线通信及万物互联等场景具备优势。本文将重点介绍太赫兹RTD探测器的研究进展及其应用进展,并对后续技术发展进行展望。

关键词：太赫兹探测器共振隧穿二极管直接探测相干探测

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D5中聚酯结构变化的分子模拟研究

郑州大学学报（工学版） 2021年第5期42卷 106-110页

作者：郑瑾张琦宋梦王冬爽杨凯焦明立中原工学院纺织学院河南郑州450007 纺织服装产业河南省协同创新中心河南郑州450007 河南省功能性纺织材料重点实验室河南郑州450007 中原工学院材料与化工学院河南郑州450007 中原工学院服装学院河南郑州450007

为了研究以D5(十甲基环五硅氧烷)为介质的聚酯染色机理以制定合理的染色工艺,探讨了聚酯(PET)在D5中微观结构的变化。通过构建不同比例聚酯、D5、1-甲基萘共存的分子模型,采用分子动力学模拟溶剂、促进剂、温度对聚酯微观特性参数的影... 详细信息

为了研究以D5(十甲基环五硅氧烷)为介质的聚酯染色机理以制定合理的染色工艺,探讨了聚酯(PET)在D5中微观结构的变化。通过构建不同比例聚酯、D5、1-甲基萘共存的分子模型,采用分子动力学模拟溶剂、促进剂、温度对聚酯微观特性参数的影响。结果表明:分子模拟构建的纯PET体系的玻璃化转变温度(Tg)与实验测得的PET的Tg相吻合;加入D5后,PET的Tg明显下降;继续加入1-甲基萘,Tg进一步降低。单纯D5的加入并没有显著改善PET分子链的运动性能,而1-甲基萘与D5共存时,PET分子链运动性能显著提高。D5与1-甲基萘的存在增加了PET的总自由体积。分子模拟聚酯微观结构发现,D5、1-甲基萘有利于提升聚酯上染速率,降低染色温度,改善染色效果。

关键词：聚酯非水溶剂染色促进剂自由体积

枣炭疽病菌拮抗芽孢杆菌的筛选鉴定及其抑菌物质分析

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园艺学报 2019年第12期46卷 2406-2414页

作者：李嘉维徐兰依王冬霜吕丽洁陈晓萌张冬冬河北农业大学生命科学学院

从冬枣果实中分离芽孢杆菌,通过对峙培养法筛选对炭疽病菌有显著拮抗活性的菌株,利用冬枣果实检测拮抗菌对炭疽病的防治效果并对拮抗菌进行种属鉴定,采用抑菌圈法及液相色谱一质谱联用技术分别对拮抗菌合成抑菌物质进行抑菌活性检测和... 详细信息

从冬枣果实中分离芽孢杆菌,通过对峙培养法筛选对炭疽病菌有显著拮抗活性的菌株,利用冬枣果实检测拮抗菌对炭疽病的防治效果并对拮抗菌进行种属鉴定,采用抑菌圈法及液相色谱一质谱联用技术分别对拮抗菌合成抑菌物质进行抑菌活性检测和结构鉴定。获得1株对枣炭疽病菌有显著拮抗活性的芽孢杆菌Tj-19,经鉴定为解淀粉芽孢杆菌(Bacillus amyloliquefaciens)。Tj-19菌体及其发酵上清液对冬枣果实炭疽病的防治效果分别达到74.9%和75.8%,主要抑菌物质为伊枯草菌素A和伊枯草菌素B。

关键词：枣炭疽病芽孢杆菌拮抗筛选抑菌物质

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酚醛纤维的湿法纺丝及其性能

上海纺织科技 2021年第8期49卷 48-51页

作者：郑瑾王冬爽任东雪焦明立杨凯中原工学院纺织学院河南郑州450007 纺织服装产业河南省协同创新中心河南郑州450007 河南省功能性纺织材料重点实验室河南郑州450007 中原工学院材料与化工学院河南郑州450007 中原工学院服装学院河南郑州450007

制备了高分子量热固性酚醛树脂,直接利用湿法纺丝制得酚醛纤维。制得的酚醛纤维拉伸强度最大为101.2 MPa,断裂伸长率约为2.6%,初始分解温度在300℃以上,热塑性酚醛树脂与甲醛物质的量比为1:3时所得的酚醛纤维在800℃条件下残炭率最高,为... 详细信息

制备了高分子量热固性酚醛树脂,直接利用湿法纺丝制得酚醛纤维。制得的酚醛纤维拉伸强度最大为101.2 MPa,断裂伸长率约为2.6%,初始分解温度在300℃以上,热塑性酚醛树脂与甲醛物质的量比为1:3时所得的酚醛纤维在800℃条件下残炭率最高,为45.8%。

关键词：湿法纺丝酚醛纤维酚醛树脂固化力学性能热稳定性

Disordered carbon structures enhance capacitive storage

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Green Carbon 2024年第3期2卷 320-321页

作者： Yu Liang Zihao Xing Mengtian Huo Zengyu Han Alei Dang Bingcheng Luo dongshuang Wu Jinfa Chang Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of ChemistryNortheast Normal UniversityChangchun 130024China School of Materials and Engineering Nanyang Technological UniversitySingapore 639798Singapore School of Materials Science and Engineering Northwestern Polytechnical UniversityXi'an 710072China College of Science China Agricultural UniversityBeijing 100083China

Electrochemical energy storage(EES)is a key technology in global research that focuses on the efficient storage and utilization of electrical energy generated from intermittent *** development of EES systems with high energy and power densities is essential for meeting the future energy demands of electrochemical capacitors,such as capacitors,which can store electrical energy obtained from intermittent sources and enable rapid energy transfer and *** double-layer capacitors(EDLCs)within porous carbon materials(Fig.1(a))are commercially popular because of their excellent conductivity and relatively low *** their advantages,the complex structure of nanoporous carbon materials hinders the optimization of supercapacitor *** previous research has suggested that adjusting the pore size of nanoporous carbon materials can enhance their capacitive performance,conflicting reports and the lack of a definitive correlation between capacitance and pore size remain issues[1].Understanding the relationship between the structure of carbon materials and their capacitance is crucial for designing devices with high energy densities.

关键词： carbon capacitance electrical

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河北省云端教学实践探索

数字教育 2016年第3期2卷 81-85页

作者：翟兮兮郭秀敏王润兰王冬双河北师范大学信息技术学院河北石家庄050024 河北广播电视大学现代教育技术中心河北石家庄050024

基于云端的学习,可以满足数字时代碎片化学习、泛在学习和终身学习的基本需求。本文应用问卷调查法和实地调研法对河北省云端教学平台和教学参与者进行调研,以"习题课—问题导学式"教学为例进行云端教学实践研究,最后在实践中反思,吸取... 详细信息

基于云端的学习,可以满足数字时代碎片化学习、泛在学习和终身学习的基本需求。本文应用问卷调查法和实地调研法对河北省云端教学平台和教学参与者进行调研,以"习题课—问题导学式"教学为例进行云端教学实践研究,最后在实践中反思,吸取经验以改进教学。

关键词：云端教学习题课 “问题导学”教学法

自我效能情志护理对血液净化患者自我管理情绪及家庭功能的影响

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光明中医 2024年第18期39卷 3770-3773页

作者：闫东爽南阳市第一人民医院血液净化室河南南阳473000

目的探究自我效能情志护理方案对血液净化患者自我管理能力、情绪及家庭功能的影响。方法回顾性分析2022年1月—2022年8月至南阳市第一人民医院进行血液净化的98例患者,将其分为对照组(49例)和观察组(49例)。对照组以常规护理进行干预,... 详细信息

目的探究自我效能情志护理方案对血液净化患者自我管理能力、情绪及家庭功能的影响。方法回顾性分析2022年1月—2022年8月至南阳市第一人民医院进行血液净化的98例患者,将其分为对照组(49例)和观察组(49例)。对照组以常规护理进行干预,观察组通过自我效能情志护理模式进行干预,比较2组患者的家庭功能、情绪以及自我管理能力等方面的差异。结果观察组各方面家庭功能得分优良率较对照组显著更高(P<0.05);观察组在自我管理方面的能力较对照组显著更高(P<0.05);观察组负性心理状态得分较对照组更低(P<0.05);观察组生活质量显著高于对照组(P<0.05)。结论自我效能情志护理模式应用于血液透析患者,可以在一定程度上提高患者对于治疗的认知,促进其自我管理能力的提升,从而提高患者家庭功能,对其负性情绪的缓解有积极作用,效果显著,值得推广。

关键词：癃闭尿毒症自我效能情志护理血液净化自我管理家庭功能