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Chemical constituents from Cicuta virosa Linnaeus and their reversal effects on doxorubicin-resistant human myelogenous leukemia(K562/A02) cells

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Chinese Chemical Letters 2016年第7期27卷 1013-1016页

作者： Shu-Qi Wang Qing-Wei Zhang xiao-Ling Wang xia-xia di xiao-Ning Wang Hong-xiang Lou School of Pharmaceutical Science Shandong University Jinan 250012 China Xintai Institute of Skin diseases Xintai 271200 China The Second Hospital of Shandong University Jinan 250033 China Faculty of Pharmaceutical Sciences School of Health Sciences University of Iceland Iceland

Two new compounds,11,11 ’-dimer of scopoletin（1） and 11-O-β-glucopyranosylhamaudol（2）,together with seven known compounds were isolated and identified from the whole grass of Cicuta *** chemical structures of the isolated compounds were elucidated using different spectroscopic *** addition,the chemical constituents were evaluated for multidrug resistance reversing activity towards doxorubicin-resistant K562/A02 *** 1,8,and 9 were endowed with remarkable MDR reversing effects.

关键词： Cicuta virosa MDR K562/A02 Doxorubicin P-Glycoprotein

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反应堆冷却剂泵惯量设计影响因素研究

原子能科学技术 2017年第8期51卷 1430-1436页

作者：钟云周文霞夏迪上海核工程研究设计院上海200240

主泵惯量设计应考虑主泵本身和回路特性的综合影响。本文建立了基于四象限特性的主泵惰转数值计算模型,评估主泵本身和回路特性对主泵惰转的影响。结果表明,转动惯量、摩擦损失等主泵因素,沿程阻力、局部阻力等回路因素均影响主泵惰转... 详细信息

主泵惯量设计应考虑主泵本身和回路特性的综合影响。本文建立了基于四象限特性的主泵惰转数值计算模型,评估主泵本身和回路特性对主泵惰转的影响。结果表明,转动惯量、摩擦损失等主泵因素,沿程阻力、局部阻力等回路因素均影响主泵惰转流量特性,但惰转转速下降主要与主泵本身因素相关,与回路因素关系不大。采用初始动能比ε表征主泵惯性和回路流体惯性的综合影响,流量下降相对转速下降的滞后程度与ε线性相关。对于ε较大的回路,应充分考虑惰转流量的滞后影响,避免主泵转动惯量设计采用过大的裕量,造成机组效率下降和设计难度提高。

关键词：主泵惰转影响因素初始动能比

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近十年入侵植物紫茎泽兰研究进展

草业科学 2017年第2期34卷 283-292页

作者：李霞霞张钦弟朱珣之山西师范大学生命学院山西临汾041004 江苏科技大学生物技术学院江苏镇江212018

紫茎泽兰(Eupatorium adenophorum)是我国危害最为严重的入侵植物,对农业、畜牧业和生态环境造成了严重的危害。本文从紫茎泽兰的生物学特性、入侵机制、入侵的生态学效应、防治与利用等方面总结了近十年紫茎泽兰的研究成果;概述了紫茎... 详细信息

紫茎泽兰(Eupatorium adenophorum)是我国危害最为严重的入侵植物,对农业、畜牧业和生态环境造成了严重的危害。本文从紫茎泽兰的生物学特性、入侵机制、入侵的生态学效应、防治与利用等方面总结了近十年紫茎泽兰的研究成果;概述了紫茎泽兰生殖和物候特征等有利于入侵的生物学特性,阐明了有利于其扩张的生理因素;总结了紫茎泽兰入侵的分子生物学机制和化学机制,紫茎泽兰入侵对生态系统中微生物和土壤生化性质的影响;介绍了紫茎泽兰防除、替代控制和利用方面的进展;指出应加强化感物质的降解和影响机制、化感物质与微生物群落间关系的研究,以及从变害为利的角度出发挖掘紫茎泽兰的利用价值;提出自然条件下对紫茎泽兰的种群建立、群落演替方面研究的重要性。

关键词：紫茎泽兰生物入侵生物学特性入侵机制生态效应

Metal-organic frameworks with dinuclear metal centers for synergistically boosting CO2 photoreduction

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Science China Chemistry 2025年第01期 201-208页

作者： Hui-Feng Wang Wen-Jie Shi Yu-Xin Yang Bao-xia Dong Tong-Bu Lu di-Chang Zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of Co Zn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,the catalytic activities of Co Ni-In and Ni Zn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

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Actively tunable electromagnetically induced transparency in hybrid dirac-VO2 metamaterials

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Optoelectronics Letters 2025年第1期21卷 13-20页

作者： di Ke XIE Meng xia Huarong CHENG Anyu LIU Yu DU Jiajia Department of Optoelectronic Engineering Chongqing University of Post and Telecommunications Chongqing Key Laboratory of Autonomous Navigation and Microsystem Chongqing University of Posts and Telecommunications Department of Automation Chongqing University of Post and Telecommunications

In this paper, we present a metamaterial structure of dirac and vanadium dioxide（VO2） and investigate its optical properties using the finite-difference time-domain（FDTD） technique. Using the phase transition feature of VO2, the design can realize active tuning of the plasmon induced transparency（PIT） effect at terahertz frequency, thereby converting from a single PIT to a double-PIT. When VO2is in the insulating state, the structure is symmetric to obtain a single-band PIT effect. When VO2is in the metallic state, the structure turns asymmetric to realize a dual-band PIT effect. This design provides a reference direction for the design of actively tunable metamaterials. Additionally, it is discovered that the transparent window's resonant frequency and the Fermi level in this structure have a somewhat linear relationship. In addition, the structure achieves superior refractive index sensitivity in the terahertz band, surpassing 1 THz/RIU. Consequently, the design exhibits encouraging potential for application in refractive index sensors and optical switches.

关键词： Transparency

CaH2-promoted activity of Ni-carbonate interface for CO2 methanation

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Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-Cui Mao Hui-Lin Jiang Bao-xia Dong Yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in Ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for Ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO3（31.6%） and Ni/CaH2-CaO （42.4%） ***,the Ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the Ni-carbonate interface for ***2could modify the electronic structure of Ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified Ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the Ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： Metal hydride Ni catalysts Carbonate Metal-carbonate interface

Beauty Restored xiamen presents a successful case of sustainable development of a bay city

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ChinAfrica 2025年第1期17卷 36-39页

作者： xia YUANYUAN xiamen

Riding along xiamen’s Xinglin Bay Marine Bicycle Lane feels like gliding between the sea and *** 2.6-km-long pathway,built above the sea,links two sides of the bay.

关键词： xiamen Marine sustainable

Potential dependence in electrocatalysis: a theoretical perspective

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Science China Chemistry 2025年第1期 21-25页

作者： Leyu Liu Zhaoming xia Zeyu Wang Yinjuan Chen Hai xiao Department of Chemistry Tsinghua University Fundamental Science Center of Rare Earths Ganjiang Innovation Academy Chinese Academy of Sciences Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou University

Electrocatalysis is a key technology for the new energy era and sustainable development, serving as the interface for interconversion of electrical and chemical energies, which spans a wide spectrum of applications in sustainable energy and environmental engineering. Electrocatalytic reactions including electrochemical CO2reduction reaction （eCO2RR）, hydrogen evolution reaction （HER）, and oxygen evolution/reduction reactions （OER/ORR）, hold essential promise for renewable energy technologies as well as complement the biogeochemical carbon and oxygen cycles.

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Subretinal fibrosis secondary to neovascular age-related macular degeneration:mechanisms and potential therapeutic targets

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Neural Regeneration Research 2025年第2期20卷 378-393页

作者： Jingxiang Zhang xia Sheng Quanju ding Yujun Wang Jiwei Zhao Jingfa Zhang Department of Ophthalmology People’s Hospital of Huangdao DistrictQingdaoShandong ProvinceChina Department of Urology People’s Hospital of Huangdao DistrictQingdaoShandong ProvinceChina Department of Ophthalmology Shanghai General Hospital(Shanghai First People’s Hospital)Shanghai Jiao Tong University School of MedicineShanghaiChina National Clinical Research Center for Eye diseases Shanghai Key Laboratory of Ocular Fundus DiseasesShanghai Engineering Center for Visual Science and PhotomedicineShanghai Engineering Center for Precise Diagnosis and Treatment of Eye DiseasesShanghaiChina

Subretinal fibrosis is the end-stage sequelae of neovascular age-related macular *** causes local damage to photoreceptors,retinal pigment epithelium,and choroidal vessels,which leads to permanent central vision loss of patients with neovascular age-related macular *** pathogenesis of subretinal fibrosis is complex,and the underlying mechanisms are largely ***,there are no effective treatment options.A thorough understanding of the pathogenesis of subretinal fibrosis and its related mechanisms is important to elucidate its complications and explore potential *** current article reviews several aspects of subretinal fibrosis,including the current understanding on the relationship between neovascular age-related macular degeneration and subretinal fibrosis;multimodal imaging techniques for subretinal fibrosis;animal models for studying subretinal fibrosis;cellular and non-cellular constituents of subretinal fibrosis;pathophysiological mechanisms involved in subretinal fibrosis,such as aging,infiltration of macrophages,different sources of mesenchymal transition to myofibroblast,and activation of complement system and immune cells;and several key molecules and signaling pathways participating in the pathogenesis of subretinal fibrosis,such as vascular endothelial growth factor,connective tissue growth factor,fibroblast growth factor 2,platelet-derived growth factor and platelet-derived growth factor receptor-β,transforming growth factor-βsignaling pathway,Wnt signaling pathway,and the axis of heat shock protein 70-Toll-like receptors 2/*** review will improve the understanding of the pathogenesis of subretinal fibrosis,allow the discovery of molecular targets,and explore potential treatments for the management of subretinal fibrosis.

关键词： choroidal neovascularization epithelial-mesenchymal transition mesenchymal transition myofibroblast neovascular age-related macular degeneration submacular fibrosis subretinal fibrosis therapeutic targets transforming growth factor-β vascular endothelial growth factor