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Simultaneous integration of Fe clusters and NiFe dual single atoms in nitrogen-doped carbon for oxygen reduction reaction

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Nano Research 2024年第4期17卷 2291-2297页

作者： Jirong Bai Yuebin Lian Yaoyao Deng mei xiang Peng Xu Quanfa Zhou Yawen Tang Yaqiong Su Research Center of Secondary Resources and Environment School of Chemical Engineering and MaterialsChangzhou Institute of TechnologyChangzhou 213022China Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China School of Chemistry Engineering Research Center of Energy Storage Materials and Devices of Ministry of EducationNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi’an Jiaotong UniversityXi’an 710049China

Atomically-dispersed iron-based electrocatalysts are promising substitutes for noble metal electrocatalysts because of excellent performance in oxygen reduction reaction(ORR).Rationally modulating the local coordination environment of the Fe site and optimizing the binding energy of oxygen reduction intermediates are effective strategies to optimize ORR ***,we report a new method in which Ni is introduced to construct NiFe dual single atoms and iron nanoclusters loaded on the nitrogen-doped carbon with a highly porous *** design plays a synergistic role of dual single atoms and clusters,optimizes the 3d orbital and Fermi level of Fe,breaks the symmetrical structure of Fe-N_(4),and effectively improves the adsorption/desorption behavior of the oxygen-containing *** tests show FeNCs/NiFeSAs-NC has an excellent intrinsic *** calculations show the oxygen-containing species on the Ni active site will move to the middle of NiFe(bridge site connection)after optimization and that the key step is OH desorption,with a reaction energy of 0.27 *** electron exchange between NiFe-N6 and Fe-cluster is very strong,further indicating the introduction of Ni species and Fe clusters has a regulatory effect on the electronic structure of Fe-N_(4).

关键词： NiFe dual single atoms Fe clusters OH*adsorption energy oxygen reduction reaction

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p38 Signaling Mediates Naringin-Induced Osteogenic Differentiation of Porcine Metanephric Mesenchymal Cells

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Chinese Journal of Integrative Medicine 2024年第9期30卷 818-825页

作者： JI Peng-cheng XIE Yuan-sheng GUO Wen-kai FU Bo CHEN xiang-mei Chinese PLA Medical School Beijing100853China Department of Nephrology First Medical Center of Chinese PLA General HospitalChinese PLA Institute of NephrologyState Key Laboratory of Kidney DiseasesNational Clinical Research Center for Kidney DiseasesBeijing Key Laboratory of Kidney DiseasesBeijing100853China School of Medicine Nankai UniversityTianjin300071China

Objective:To explore the potential of metanephric mesenchymal cells(MMCs)for osteogenesis and naringin’s ability to enhance this process and its molecular ***:Porcine MMCs at 70 days of gestation were used as tool cells,cultured in osteogenic induction medium,identified by immunocytochemistry *** potential of porcine MMCs and naringin’s ability to enhance this process was tested by detecting changes in cell viability,alkaline phosphatase(ALP)activity,the expression of runt-related transcription factor 2(Runx2),osteopontin(OPN)and osteocalcin(OCN),and the formation of mineralized nodules,and the application of the p38 signaling pathway inhibitor SB203580 vitiated the osteogenesis-promoting effect of ***:Immunocytochemical staining showed that the cells were Vimentin and Six2(+),E-cadherin and CK-18(−).Naringin can activate the p38 signaling pathway to enhance the osteogenesis of porcine MMCs by increasing cell viability,ALP activity,the expressions of Runx2,OPN and OCN,and the formation of mineralized nodules(P<0.05).The application of p38 signaling pathway inhibitor SB203580 vitiated the osteogenesis-promoting effect of naringin,manifested by decreased ALP activity,the expressions of Runx2,OPN and OCN,and the formation of mineralized nodules(P<0.05).Conclusion:Naringin,the active ingredient of Chinese herbal medicine Rhizoma Drynariae for nourishing Shen(Kidney)and strengthening bone,enhances the osteogenic differentiation of renal MMCs through the p38 signaling pathway.

关键词： metanephric mesenchymal cells naringin osteogenesis differentiation

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Inherently Chiral and Symmetrical Heteroatom-Doped Zigzag-Type Hydrocarbon Belts

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CCS Chemistry 2024年第5期6卷 1198-1210页

作者： Xue-Yuan Wang Xin-Yu Zhang Shuo Tong Qing-Hui Guo mei-Ling Tan Cheng-Jun Li mei-xiang Wang Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084

hydrocarbon belts due to their potential applications in carbon *** contrast,heteroatomembedded zigzag hydrocarbon belts as advanced design strategies with fascinating structures and desirable,unique properties have remained largely unexplored,and inherently chiral ones are ***,we report the synthesis of a diversity of symmetric and highly enantiopure inherently chiral O-and N-doped zigzag-type hydrocarbon belts starting from strainless macrocycles based on fjord-stitching *** readily available pertriflated resorcin[6]arene underwent partial hydrolyses and intramolecular S_(N)Ar reactions to form a calix[3](9H-xanthene)derivative and a prochiral half-belt *** transformations of calix[3](9H-xanthene)into C_(3v)-symmetric molecular belts were achieved by closing the rest of the fjords with triple intramolecular S_(N)Ar reactions and Yamamoto homo coupling reactions,as well as palladiumcatalyzed intermolecular acridination reactions with primary *** prochiral half-belt underwent enantioselective desymmetrizative mono-acridination to afford an inherently chiral N,O_(4)-bridged pseudo-belt with an enantiomeric excess(ee)value of>99%under the catalysis of Pd(OAc)_(2)and(R)-*** closure reactions of the pseudo-belt produced diverse heteroatom-inlayed zigzag-type hydrocarbon belts of inherent ***,we showed the unique cavity structures of the belts and demonstrated interesting chiroptic properties of the inherently enantiopure chiral *** research opens the door for the exploration of novel and sophisticated symmetric and inherently chiral molecular nanobelt structures with outstanding physical and chemical properties,as well as potential applications.

关键词： zigzag-type molecular belt heterocycle chiroptical property fjord-stitching strategy resorcinarene

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Microwave excited hyperthermy and catalysis of heterostructured Au/Cu–BTA for effective bacteria killing by accelerating charge separation

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Rare Metals 2024年第10期43卷 5186-5201页

作者： Wen-Jing Zhang Li-Guo Jin Shui-Lin Wu Chao-Feng Wang Yu-Feng Zheng Zhao-Yang Li Zhen-Duo Cui Hui Jiang Sheng-Li Zhu xiang-mei Liu School of Materials Science and Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin University Biomedical Materials Engineering Research Center Hubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei University School of Materials Science and Engineering Peking University School of Health Science and Biomedical Engineering Hebei University of Technology

Deep tissue infections caused by pathogenic bacteria seriously threat the lives of *** this study a smart heterostructured Au/Cu-BTA （BTA=1,2,4,5-benzenetetramine） with microwave （MW） response is synthesized via NaBH4reduction of HAuCl4on the ***/Cu-BTA exhibits excellent hyperthermy and dynamics under MW *** MW thermal mechanism of Au/Cu-BTA is attributed to the excellen dielectric loss and polarization of the heterogeneous ***,the surface energy levels of the Cu-BTA interface alleviate the difficulty of electron hopping through multistage ***,MW can excite Cu-BTA to produce free ***,Au nanoparticles rapidly increase electron transfer and inhibit electron-hole ***,the yields of reactive oxygen species can be enhanced for MW dynamic therapy Consequently,under 10 min of MW irradiation,Au/Cu-BTA killed 99.998%±0.001% of Gram-positive Staphylococcus aureus,99.966%±0.014% of methicillin-resistant Staphylococcus aureus,and 96.871%±0.831% of Gram-negative Pseudomonas *** effective MW bacteria-killing strategy designed in this study shows significant potential for application in the MW-responsive treatment of deep tissue infections without antibiotics.

关键词： Anti-infection Antibacterial Microwave therapy

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速冻调制鱼块的工艺优化

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食品科技 2024年第7期49卷 139-146页

作者：向梅广西水产畜牧学校广西南宁530000

为提高速冻鱼块的风味与口感,便于家庭及酒店的烹调加工,以产品感官评分为指标,在单因素试验基础上,利用正交试验对速冻调制鱼块的加工工艺进行优化。主要围绕淡水鱼的脱腥工艺、调制工艺、速冻工艺进行相关研究。脱腥工艺中以3%盐+0.6... 详细信息

为提高速冻鱼块的风味与口感,便于家庭及酒店的烹调加工,以产品感官评分为指标,在单因素试验基础上,利用正交试验对速冻调制鱼块的加工工艺进行优化。主要围绕淡水鱼的脱腥工艺、调制工艺、速冻工艺进行相关研究。脱腥工艺中以3%盐+0.6%白芷+0.5%生姜+2%料酒构成的组合脱腥液脱腥效果最好;腌制过程中分析了腌制温度、食盐添加量以及复合磷酸盐添加量对腌制品质量的影响。单因素试验和正交试验结果表明,最佳的腌制温度、食盐添加量、复合磷酸盐的添加量分别为5℃、3.0%、0.5%。在正交优化的基础上,研究了谷胺酰转氨酶(Transglutaminase, TG酶)对腌制鱼块质构的影响。结果表明,0.3%的TG酶应用于腌制鱼块加工可以明显提高其质构;调制完成的鱼块在–80℃条件下迅速冻结,其产品的品质和质构指标明显优于缓冻产品。

关键词：鲢鱼复合磷酸盐速冻工艺优化正交试验

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钙钛矿太阳能电池材料缺陷对器件性能与稳定性的影响

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物理学报 2024年第6期73卷 16-33页

作者：王静高姗段香梅尹万健宁波大学物理科学与技术学院宁波315211 苏州大学能源学院能源与材料创新研究院苏州215006

基于钙钛矿太阳能电池材料独特的光电特性,特别是光电转换效率在初期短时间内的快速提升,使其成为当前光伏领域中最富吸引力的光吸收材料之一.然而,近年来转换效率的增长步入缓慢阶段,同时材料的长期稳定性也成为商业化应用的关键挑战,... 详细信息

基于钙钛矿太阳能电池材料独特的光电特性,特别是光电转换效率在初期短时间内的快速提升,使其成为当前光伏领域中最富吸引力的光吸收材料之一.然而,近年来转换效率的增长步入缓慢阶段,同时材料的长期稳定性也成为商业化应用的关键挑战,这些问题背后的物理机制与材料缺陷密切相关.为进一步提高电池效率和结构稳定性,必须深刻理解和精准地掌握这些缺陷的特性.本文全面回顾了钙钛矿材料中各类缺陷对光伏性能和稳定性的影响,包括传统刚性模型缺陷、非常规性缺陷、复合型缺陷、离子迁移和缺陷对载流子寿命的影响,论述了缺陷与材料结构稳定性之间的紧密关联性,并对未来关于缺陷的研究方向进行了展望.

关键词：钙钛矿太阳能电池缺陷非辐射复合稳定性

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内外情境下政治嵌入对企业持续性创新的影响研究--基于资源注入与信息沟通的双重效应

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软科学 2024年第6期38卷 120-129,136页

作者：李香梅王静李猛山东财经大学会计学院济南250014 国家税务总局青州市税务局山东潍坊262500

以2008-2020年沪深A股非金融类上市公司为对象,引人资源注入和信息沟通为中介变量,结合内部控制和营商环境内外情境双重视角,探讨政治嵌入对持续性创新的影响路径和边界条件。研究发现:政治嵌入正向影响企业持续性创新;资源注入和信息... 详细信息

以2008-2020年沪深A股非金融类上市公司为对象,引人资源注入和信息沟通为中介变量,结合内部控制和营商环境内外情境双重视角,探讨政治嵌入对持续性创新的影响路径和边界条件。研究发现:政治嵌入正向影响企业持续性创新;资源注入和信息沟通在两者间发挥双重中介效应;内部控制正向调节资源注入、信息沟通与持续性创新关系,进而强化上述两中介变量在政治嵌入与持续性创新中的间接效应;营商环境则通过负向调节政治嵌入与资源注入、信息沟通关系,约束两中介变量发挥的间接效应;内部控制和营商环境发挥的调节作用相互补充,内部控制高效运行时,营商环境对政治嵌入与资源注入、信息沟通的约束作用愈发显著,进而提升企业持续性创新自主性。

关键词：政治嵌入持续性创新内部控制营商环境

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What Can Topology Bring to Chemistry?

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CCS Chemistry 2024年第9期6卷 2084-2109页

作者： Wei Wang Songtao Zhou Xiujun Yu Qing-Hui Guo Yanhang Ma Jie Song Liang Zhang Xuzhou Yan Lu Han Qing Liao Xiaopeng Li Wen-Bin Zhang Yiyong Mai Shaodong Zhang Shunai Che Hai-Bo Yang Xuefeng Fu mei-xiang Wang School of Chemistry and Molecular Engineering East China Normal UniversityShanghai 200062 Hangzhou Institute of Medicine Chinese Academy of SciencesHangzhou 310022Zhejiang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060Guangdong MOE Key Laboratory of Bioorganic Phosphorous and Chemical Biology Department of ChemistryTsinghua UniversityBeijing 100084 School of Physical Science and Technology and Shanghai Key Laboratory of High-Resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210 School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesState Key Laboratory of Composite MaterialsShanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240 School of Chemical Science and Engineering Tongji UniversityShanghai 200092 Beijing Key Laboratory for Optical Materials and Photonic Devices Department of ChemistryCapital Normal UniversityBeijing 100048 Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871 Department of Chemical Sciences National Natural Science Foundation of ChinaBeijing 10085

The unique mathematical perspectives and principal concepts of topology have not only promoted the development of other branches of mathematics but have also deeply influenced other subjects,particularly physics and *** minireview aims to elucidate the substantial influence of topology on chemistry by critically examining both the contributions of topology to current chemical science and its potential future *** will discuss the topology of molecular structures and assemblies across various scales—from small molecules and mechanically interlocked molecules to polymers,biomacromolecules,and supramolecular *** discussion will include an exploration of cutting-edge techniques for characterizing topological features,underscoring the role of topology as a novel paradigm for the design and synthesis of new molecular ***,a critical analysis of topology’s role in the development of functional materials—such as photonic materials,polymers,biomacromolecules,and chiral materials—will demonstrate its emerging significance as a crucial parameter in unveiling novel properties and *** topology’s formidable potential,it is anticipated to be used increasingly to address pivotal challenges within chemistry and adjacent disciplines.

关键词： chemical topology topological invariants molecular graphs links and knots structureproperty relationship

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开发“生活化”创新实验打造物理高效课堂——以“影响导体电阻大小的因素”教学为例

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中小学实验与装备 2024年第1期34卷 15-18页

作者：谢美翔广东省湛江市霞山实验中学 524001

开发“生活化”创新实验实施物理新课教学,在课程内容情境化实验探究中对教材知识实施整合和优化,是未来物理教学的主要方向。文章以“影响导体电阻大小的因素”教学为例,巧妙设计创新实验,探究、分析并解决真实问题,实现高效课堂教学,... 详细信息

开发“生活化”创新实验实施物理新课教学,在课程内容情境化实验探究中对教材知识实施整合和优化,是未来物理教学的主要方向。文章以“影响导体电阻大小的因素”教学为例,巧妙设计创新实验,探究、分析并解决真实问题,实现高效课堂教学,提升物理核心素养。

关键词： “生活化”创新实验导体电阻影响因素高效课堂

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永续发展视角下土地流转对农户消费行为的影响

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经济问题 2024年第10期 103-111页

作者：剌美香何云峰周力山西农业大学农业经济管理学院山西农业大学公共管理学院同济大学经济与管理学院

随着城镇化进程的持续推进，土地流转面积不断扩大，土地资源的重新配置会引起农户消费行为的变化，进而影响农村居民的永续发展。基于2010—2020年6年的中国家庭追踪调查数据，采用固定效应模型并考虑了内生性问题的回归结果表明，土... 详细信息

随着城镇化进程的持续推进，土地流转面积不断扩大，土地资源的重新配置会引起农户消费行为的变化，进而影响农村居民的永续发展。基于2010—2020年6年的中国家庭追踪调查数据，采用固定效应模型并考虑了内生性问题的回归结果表明，土地流转对农户的消费存在显著的促进作用，土地转入显著提高了农户发展型消费。从作用机制来看，土地转出租金的心理账户效应提高了农户的暂时性消费；土地转入的收入效应提高了农户消费性支出、耐用品支出和发展型支出；土地转入显著提高农户总劳动生产率，进而提高农户收入，影响农户发展型消费。此外，最高收入群体的土地租金心理账户效应显著高于最低收入群体，土地转入对非老年户的发展型消费影响更明显，但土地流转对是否领取养老金的农户消费行为影响不存在显著差异。因此，要实现农户的永续发展还需要进一步优化农地流转政策，同时发展农业生产托管服务，提高农村社会养老保障水平。

关键词：永续发展土地流转消费行为劳动生产率心理账户

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