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Science China Chemistry 2025年第3期 943-950页

作者： Jun-qiang chen Qiao-Hong Li Qin-Long Hong Ping Shao Hai-Xia Zhang Jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences

Single-atom catalyst has garnered widespread attention to mimic mature enzymes due to its well-defined atomic structure and coordination ***,since the carbon–carbon（C–C） coupling reactions require synergistic catalysis of multiple sites,single-atom catalysts suffer from insufficient active sites and unclear reaction *** the reaction intermediates in a precisely targeted pocket through careful metal–organic cage design is therefore ***,we prepare a tetrahedral [Cu6L4]-type boron–imidazolate cage integrating highly active Cu sites and optimized cavity,which exhibits enzyme like specific catalytic performance in electrochemical CO2reduction reaction（CO2RR） to enhance the selectivity of *** analyses and computational calculations suggest that the single Cu site together with neighboring boron–imidazolate ligands provides suitably synergistic effects that enable the energetically favorable formation of an*COCHO intermediate,a key step determining *** a result,the [Cu6L4]-type cage of BIC-145 achieves a Faradaic efficiency of 28% for C2H4maintaining an average current density of -3.54 m A cm-2over a 5-hour electrolysis *** work represents the first example for studying single-metal site catalysts with ultra-low coordination numbers through the rational design of metal–organic cages.

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Effects of mode of reproduction on genetic polymorphism and divergence in wild yams(Dioscoreaceae:Dioscorea)

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Plant Diversity 2025年第1期47卷 136-147页

作者： Xin Wang Qing-Hong Feng Zhi-Hua Zeng Zhi-qiang Zhang Jie Cai Gao chen De-Zhu Li Hong Wang Wei Zhou Germplasm Bank of Wild Species&Yunnan Key Laboratory of Crop Wild Relatives Omics Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University of Chinese Academy of Sciences Beijing 100049China Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology Institute of BiodiversitySchool of Ecology and Environmental ScienceYunnan UniversityKunmingYunnan 650504China Research Institute of Tropical Forestry Yunnan Academy of Forestry and GrasslandXishuangbannaYunnan 666102China CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Key Laboratory of Phytochemistry and Natural Medicines Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Lijiang Forest Biodiversity National Observation and Research Station Kunming Institute of BotanyChinese Academy of SciencesLijiangYunnan 674100China

Evolutionary transitions from sexual to asexual reproduction should have significant influences on genetic divergence and polymorphism at the genome *** lineages with diverse reproductive systems provide opportunities to investigate this question using comparative approaches and studies of molecular *** investigated evidence for differences among the transcriptomes of 19 Dioscorea species(wild yams)with diverse reproductive *** included sexual species,those that propagate primarily by bulbils,and those with mixed sexual and asexual reproductive *** examined how transitions between these reproductive systems affected between-species divergence and within-species *** asexual species exhibited a reduced efficacy of natural selection and accumulation of deleterious mutations for both divergence and *** contrast,species with mixed reproductive strategies involving both seed and clonal reproduction showed no evidence of an increased fixation of harmful mutations at the divergence level,while an accumulation of genetic load present in polymorphism was *** study indicates that the genetic consequences of evolutionary transitions from sexual to predominantly clonal reproduction is likely to depend on both the duration and extent of asexuality occurring in populations.

关键词： Asexual Deleterious mutations Dioscorea Molecular evolution Selection

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Stretchable All-Small-Molecule Organic Solar Cells Enabled by Polymer Elastomer Confinement

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Chinese Journal of Polymer Science 2025年第2期43卷 271-277页

作者： chen-Yi Zhang Yu-qiang Liu Hong-Xiang Li Xin-Yue Cui Zheng-Dong Wei Yue-Heng Liu Ming-Hua Li An-Dong Zhang Pei cheng Zhi-Shan Bo College of Textiles&Clothing State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao266071China State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu610065China College of Materials Science and Engineering Qingdao UniversityQingdao266071China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing100875China

Intrinsic stretchability is a promising attribute of polymer organic solar cells(OSCs).However,rigid molecular blocks typically exhibit poor tensile properties,rendering polymers vulnerable to mechanical *** this study,we introduce a different approach utilizing all-small-molecule donors and acceptors to fabricate stretchable *** elastomer,styrene-b-ethylene-butylene-styrene(SEBS),was embedded to modulate film crystallization and *** effectively confines the growth process of donors and acceptors,leading to enhancement of the crystallization quality,thus contributing to enhanced device ***,SEBS can absorb and release mechanical stress during stretching,thereby preventing mechanical degradation of donors and *** mechanical properties of the OSCs were significantly improved by the incorporation of ***,the crack-onset strain increased from 1.03% to 5.99% with SEBS *** findings present a straightforward strategy for achieving stretchable OSCs using all small molecules,offering a different perspective for realizing stretchable devices.

关键词： All-small-molecule Organic solar cells Elastomer Stretchability Flexibility

Ultrasound features of congenital cytomegalovirus infection in the first trimester:A case report

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World Journal of Clinical Cases 2025年第5期13卷 30-35页

作者： Xiao-Li chen Li-qiang Zhang Li-Li Bai Department of Ultrasound Wenzhou Central HospitalWenzhou 325000Zhejiang ProvinceChina

BACKGROUND Congenital cytomegalovirus(CMV)infection represents a significant public health concern as the most prevalent viral infection in newborns,potentially leading to severe neurological and developmental *** majority of cases are asymptomatic and remain undetected during pregnancy due to the absence of effective screening *** SUMMARY A 27-year-old primigravida presented for early pregnancy ultrasound,which revealed an atypical finding:A normal anechoic thalamus appearing hyperechoic on the mid-sagittal view of the fetal *** ultrasound examinations during mid and late gestation demonstrated classic intracranial features sug-gestive of congenital CMV *** karyotyping and microarray analysis of the fetus yielded no significant *** compre-hensive prenatal counseling regarding potential adverse fetal outcomes,the patient elected to continue her *** ultimately underwent cesarean delivery at 42 weeks gestation at another facility,resulting in the birth of a female *** five months of age,the infant presented with epilepsy and significant growth and developmental *** Congenital CMV infection occurs during the first trimester may manifest as hyperechoic thalamus which can be revealed by ultrasound in the mid-saggital view of the fetal *** research should investigate the correlation between echogenic thalamus and developmental outcomes,as well as explore early sc-reening techniques for suspected congenital CMV infection cases.

关键词： Prenatal diagnosis Congenital infection Cytomegalovirus Fetal ultrasound Case report

Laser direct writing of flexible multifunctional airflow sensors on the Kevlar fabric

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Nano Research 2025年第1期18卷 443-454页

作者： Wei Wang Zi-Qing chen Yong-Qi Li Yu-Long Wang Mei-chen Liu Yun-Bo Ruan Yang Zhang Shu-Juan Liu qiang Zhao College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Zhe Jiang Topsun Logistic Control CO. LTD.Yuhuan 317600China Department of Rehabilitation Medicine School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and RehabilitationNanjing University of Chinese MedicineNanjing 210023China

The growing interest in flexible devices has emerged as a global trend due to their advantages in flexibility,lightweight structure,and wearability,addressing the limitations of traditional *** wearable airflow sensors have been previously reported,the development of flexible fabric-based airflow sensors capable of functioning in environments with open flames—critical for fire rescue operations—has yet to be explored,largely due to the poor fire resistance of conventional *** this work,we first present a flexible,wearable,and multifunctional airflow sensor with excellent fire-resistant properties,fabricated through a simple direct laser writing *** sensor maintains airflow detection capabilities even in the presence of open ***,the fabrication of fabric-based sensors involves complex procedures such as carbon materials doping or vapor-phase deposition,leading to lengthy preparation cycles and high ***,fabric-based devices are inherently prone to *** address these challenges,we introduce twice-vertical laser-induced graphene(TVLIG)as a sensitive and reliable component for fire-resistant airflow *** resulting TVLIG/Kevlar fabric can be integrated into various garments,particularly protective suits,to form sensitive and fire-resistant airflow sensors capable of detecting airflow velocity and direction in both two-dimensional(2D)and three-dimensional(3D)spaces during fire ***,the TVLIG patterns can be expanded to multifunctional platforms,such as glucose detection for injured individuals,offering further applications in rescue *** functional expansion reduces the burden on rescue personnel and streamlines device *** its outstanding sensing capabilities,fire resistance,and expandability,the developed flexible airflow sensor shows great potential for various real-world rescue scenarios,promising advancements in wearable sensing technology for rescue enginee

关键词： flexible airflow sensor direct laser writing twice-vertical laser-induced graphene fire accident rescue Kevlar fabric

A Plasma Injection Ion Source for Photoelectron Imaging of Metal-Containing Anions

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Chinese Journal of Chemical Physics 2025年第1期38卷 1-7,I0055页

作者： Shaowen Feng Zhen Li Wenli Liu qiang Zhang Yang chen Dongfeng Zhao Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026China

A plasma injection ion source has been de-veloped for the photoelectron velocity imag-ing studies of metal-containing *** source employs a pulse discharge nozzle for generating a plasma beam that perpendicu-larly crosses the master supersonic jet beam from a home-made pulsed piezo *** discharge nozzle is designed for high voltage gas discharge with efficient metal sputtering of the cathode,and thus plays a role in met-al atom and ion *** jet-cooled anions can be produced in the master gas jet via reactions of the plasma *** source is integrated into a photoelectron ve-locity imaging *** mass spectrometry experiments show that the ion source can efficiently produce transition metal containing anions,such as FeO_(m)^(-),CuO_(m)^(-),CuC_(n)^(-),CuC_(n)O_(m)^(-).The photoelectron imaging results by photodetachment of O-show that the pho-toelectron energy resolution of the whole instrument isΔE/E≈2.3%,and the results of FeO^(-)indicate that internal temperatures of anions from the source could be efficiently cooled down.

关键词： Anion source Pulsed piezo valve Photoelectron imaging

A Newly Established Air Pollution Data Center in China

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Advances in Atmospheric Sciences 2025年第4期42卷 597-604页

作者： Mei ZHENG Tianle ZHANG Yaxin XIANG Xiao TANG Yinan WANG Guannan GENG Yuying WANG Yingjun LIU Chunxiang YE Caiqing YAN Yingjun chen Jiang ZHU qiang ZHANG Tong ZHU SKL-ESPC College of Environmental Sciences and Engineeringand Center for Environment and HealthPeking UniversityBeijing 100871China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China School of Environment Tsinghua UniversityBeijing 100084China School of Atmospheric Physics Nanjing University of Information Science&TechnologyNanjing 210044China Environment Research Institute Shandong UniversityQingdao 266237China Department of Environmental Science and Engineering Fudan UniversityShanghai 200092China Department of Earth System Science Tsinghua UniversityBeijing 100084China

Air pollution in China covers a large area with complex sources and formation mechanisms,making it a unique place to conduct air pollution and atmospheric chemistry *** National Natural Science Foundation of China’s Major Research Plan entitled“Fundamental Researches on the Formation and Response Mechanism of the Air Pollution Complex in China”(or the Plan)has funded 76 research projects to explore the causes of air pollution in China,and the key processes of air pollution in atmospheric physics and atmospheric *** order to summarize the abundant data from the Plan and exhibit the long-term impacts domestically and internationally,an integration project is responsible for collecting the various types of data generated by the 76 projects of the *** project has classified and integrated these data,forming eight categories containing 258 datasets and 15 technical reports in *** integration project has led to the successful establishment of the China Air Pollution Data Center(CAPDC)platform,providing storage,retrieval,and download services for the eight *** platform has distinct features including data visualization,related project information querying,and bilingual services in both English and Chinese,which allows for rapid searching and downloading of data and provides a solid foundation of data and support for future related *** pollution control in China,especially in the past decade,is undeniably a global exemplar,and this data center is the first in China to focus on research into the country’s air pollution complex.

关键词： air pollution data center platform multi-source data China

Spatial and Temporal Variation of Dissolved Organic Matter and Its Biodegradability in Typical Algal Bay

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Huanjing Kexue/Environmental Science 2025年第3期46卷 1406-1416页

作者： Wu, Yuan-qiang Jin, Wei Hua, Ke Cang, Zi-chen Liu, Xin College of Ecology and Environment Nanjing Forestry University Nanjing210037 China Nanjing High-tech Construction and Development Co. Ltd. Nanjing210038 China

The biodegradability of dissolved organic matter（DOM） is a crucial factor in assessing the carbon balance and ecosystem equilibrium of freshwater lakes. It is closely linked to regional hydrological characteristics and biochemical processes. Taking cyanobacterial bloom-dominated bays in Lake Taihu as the research object，combined with characterization by ultraviolet absorption，three-dimensional fluorescence spectroscopy，and bioassay experiments，this study analyzed the temporal and spatial variations of DOM concentration，structural composition，and biodegradable dissolved organic carbon（BDOC） during the rainy and bloom season and the dry and post-bloom season. The results showed that during the bloom season，the release of cyanobacterial-derived organic matter led to a significant increase in DOM concentration in Meiliang Bay and Gonghu Bay，which was mainly composed of protein components，such as tyrosine and tryptophan （>70%） with a lower aromaticity （SUVA254），molecular weight，and humification degree（HIX）. In comparison，the DOM samples in Zhushan Bay had higher absorbance （SUVA350），SUVA254，HIX，relative molecular mass，and content of humic substances，which was associated with stronger input of terrestrial humic substances during the rainy season. As a result，the average BDOC in Zhushan Bay was lower （31.6%） compared to those in the other two bays （38.8%）. With the decline of cyanobacterial bloom and the decrease of terrestrial input in the dry and post-bloom season，in-situ degradation significantly increased SUVA254 and humic-like components while decreasing protein-like components in DOM. This resulted in a decrease in average BDOC to 28.1%. Partial least squares analysis further revealed that DOM optical indices could effectively predict BDOC（R2=0.81），with fluorescence peaks T/C and SR indices being the most effective positive predictive factors and SUVA254 being the most effective negative predictive factor. These findings suggest that cyanobacterial blooms and in-situ

关键词： Bioassay

A novel Li-ion based transistor within LiCoO2/Li6.75La3Zr1.5Ta0.5O12/Ag scheme

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Progress in Natural Science:Materials International 2025年第01期 194-200页

作者： Jixiang Yin Houning Song Peirong Li Yuzhi Xing Supeng chen Qi Liang Yu Feng Dong Yang Wenxiao Zhao Dong Wang Qinghao Li Pengfei Yu qiang Li Xiaosong Liu Yanxue chen College of Physics Qingdao University School of Physics State Key Laboratory of Crystal Materials Shandong University Center for Transformative Science ShanghaiTech University National Synchrotron Radiation Laboratory University of Science and Technology of China

Traditional electronic devices are reaching their physical limits as they shrink in size to improve integration. Solid ionic devices have become promising candidate to avoid tunneling effect and address these constraints, but the response time are typically sluggish. In recent years, the rapid development of solid electrolyte and solid-state battery provide superior choices to overcome limitations in ion transport. In this work, we construct an ionic transistor within Ag/LiCoO2/Li6.75La3Zr1.5Ta0.5O12（LLZTO）/Ag structure. LiCoO2serves as the channel layer of the transistor, with LLZTO acting as the electrolyte to isolate electrons and facilitate ion conduction, and Ag as the gate/anode. XRD, Raman spectroscopy, and electrochemical characterization confirm lithiation and *** characterization demonstrates the continuous resistive switching of the LiCoO2channel layer between high and low resistive states under pulsed gate voltage control, exhibiting high reversibility and long cycle stability. By combining X-ray absorption spectroscopy（XAS） and X-ray emission spectroscopy（XES）, the transition between high and low resistive states can be well clarified by a first-order Mott transition scheme. These results provide new perspectives for performance improvement and further development of ionic devices.

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基于韧性分析的特高压换流站地震后快速修复算法

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电网技术 2025年第1期49卷 390-398,I0118页

作者：陈俊翰谢强吴思源同济大学土木工程学院上海市杨浦区200092 土木工程防灾减灾全国重点实验室(同济大学) 上海市杨浦区200092

特高压换流站是长距离输电的重要节点,其震后修复路径对快速恢复电气功能有重要意义。该文针对特高压换流站拓扑结构的特点,首先定义韧性矩阵和由韧性矩阵计算抗震韧性指标的函数,然后通过演绎推理论证了该函数最小值的存在性,最后提出... 详细信息

特高压换流站是长距离输电的重要节点,其震后修复路径对快速恢复电气功能有重要意义。该文针对特高压换流站拓扑结构的特点,首先定义韧性矩阵和由韧性矩阵计算抗震韧性指标的函数,然后通过演绎推理论证了该函数最小值的存在性,最后提出了排列算法求解该最小值,并输出最优修复路径。通过该方法对某一实际换流站开展研究,并通过实际算例验证了理论的正确性和算法的可行性。该算法可为特高压换流站震后快速修复提供算法依据。

关键词：特高压换流站韧性矩阵抗震韧性指标最优修复路径排列算法

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