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De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第1期68卷 174-180页

作者： Fan-xiao Meng Xing-Yu wang Ka Lu Ju-Song Yang Fu-Min Zhang Ai-Jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

关键词： benzofuran atropisomers novel de novo synthetic strategy asymmetric formal [3 + 2] cycladdition Cu/SPDO complex DFT calculations

Decreased levels of phosphorylated synuclein in plasma are correlated with poststroke cognitive impairment

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Neural Regeneration Research 2025年第9期20卷 2598-2610页

作者： Yi wang Yuning Li Yakun Gu Wei Ma Yuying Guan Mengyuan guo Qianqian Shao Xunming Ji Jia Liu Department of Clinical Laboratory Beijing Bo’ai HospitalChina Rehabilitation Research CenterCapital Medical UniversityBeijingChina Beijing Institute of Brain Disorders Laboratory of Brain DisordersMinistry of Science and TechnologyCollaborative Innovation Center for Brain DisordersBeijing Advanced Innovation Center for Big Data-based Precision MedicineCapital Medical UniversityBeijingChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina

Poststro ke cognitive impairment is a major secondary effect of ischemic stroke in many patients;however,few options are available for the early diagnosis and treatment of this *** aims of this study were to(1)determine the specific relationship between hypoxic andα-synuclein during the occur of poststroke cognitive impairment and(2)assess whether the serum phosphorylatedα-synuclein level can be used as a biomarker for poststro ke cognitive *** found that the phosphorylatedα-synuclein level was significantly increased and showed pathological aggregation around the cerebral infa rct area in a mouse model of ischemic *** addition,neuronalα-synuclein phosphorylation and aggregation were observed in the brain tissue of mice subjected to chronic hypoxia,suggesting that hypoxia is the underlying cause ofα-synuclein-mediated pathology in the brains of mice with ischemic *** phosphorylatedα-synuclein levels in patients with ischemic stroke were significantly lower than those in healt hy subjects,and were positively correlated with cognition levels in patients with ischemic ***,a decrease in serum high-density lipoprotein levels in stroke patie nts was significantly correlated with a decrease in phosphorylatedα-synuclein *** ischemic stroke mice did not show significant cognitive impairment or disrupted lipid metabolism 14 days after injury,some of them exhibited decreased cognitive function and reduced phosphorylatedα-synuclein *** together,our results suggest that serum phosphorylatedα-synuclein is a potential biomarker for poststroke cognitive impairment.

关键词： biomarker high-density lipoprotein ischemic stroke phosphorylatedα-synuclein poststroke cognitive impairment

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基于DSP的嵌入式图像识别系统设计与实现

电视技术 2006年第2期30卷 82-84页

作者：王孝国张雄伟中国人民解放军理工大学通信工程学院江苏南京210007

设计实现了一种基于DSP的嵌入式图像识别系统。该系统采用专用视频输入处理芯片SAA7111和DSP实现了数字图像的采集、预处理、特征提取及识别,且对系统中的图像采集、图像处理、USB通信模块以及系统的升级维护方法进行了介绍,给出了基于... 详细信息

设计实现了一种基于DSP的嵌入式图像识别系统。该系统采用专用视频输入处理芯片SAA7111和DSP实现了数字图像的采集、预处理、特征提取及识别,且对系统中的图像采集、图像处理、USB通信模块以及系统的升级维护方法进行了介绍,给出了基于该系统的人脸识别方案及测试结果。

关键词：图像处理通用串行总线软件优化人脸识别

羊膜提取液抑制兔Epi-LASIK术后haze形成的作用和机制

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国际眼科杂志 2017年第8期17卷 1427-1432页

作者：夏世刚王俞方肖启国彭华南华大学附属第二医院眼科中国湖南省衡阳市421001 南华大学附属第二医院耳鼻喉科中国湖南省衡阳市421001

目的:探讨羊膜提取液(AE)抑制兔微型角膜刀法准分子激光角膜上皮瓣下磨镶术(Epi-LASIK)后角膜上皮下雾状混浊(haze)形成的作用和机制。方法:新西兰白兔36只72眼按照随机数字表法分为三组:AE组、激素组和溶媒对照组。构建Epi-LASIK动物模... 详细信息

目的:探讨羊膜提取液(AE)抑制兔微型角膜刀法准分子激光角膜上皮瓣下磨镶术(Epi-LASIK)后角膜上皮下雾状混浊(haze)形成的作用和机制。方法:新西兰白兔36只72眼按照随机数字表法分为三组:AE组、激素组和溶媒对照组。构建Epi-LASIK动物模型,术后AE组滴用AE眼液,激素组滴用1g/L磷酸地塞米松眼液,溶媒对照组滴用不含AE的溶媒眼液。术后1、4、8wk在裂隙灯下进行haze分级评估。HE染色观察角膜上皮的修复,免疫组织化学法观察角膜上皮细胞NF-kB P65蛋白的表达。用ELISA法检测炎症细胞因子(TNF-α、TGF-β1和IL-1β)和抗炎症细胞因子(IL-4、IL-10和IL-13)的表达水平。结果:HE染色结果显示,与激素组和溶媒对照组比较,Epi-LASIK术后1wk,AE组兔角膜上皮基底细胞形态较均匀,排列较规则;术后4wk时,AE组浅基质层内出现少量新生胶原纤维,排列较规则,形成少量瘢痕;术后8wk,AE组角膜浅基质层见少量新生胶原纤维,排列规则,极少形成瘢痕。在术后早期(1wk和4wk),AE组与激素组、溶媒对照组相比,具有明显抑制炎症因子(TNF-α、TGF-β1和IL-1β)和促进抗炎症因子(IL-4、IL-10和IL-13)分泌的作用,组间比较差异有显著统计学意义(P<0.01)。而且,在术后早期(1wk和4wk),AE组与激素组、溶媒对照组相比,角膜上皮细胞NF-kB通路关键组份P65蛋白浅染,细胞核淡染,明显抑制NF-kB信号通路的激活。结论:羊膜提取液可能通过抑制角膜上皮细胞的NF-kB信号通路,减轻炎症反应,从而减少胶原与瘢痕形成和haze的发生。

关键词：羊膜提取液微型角膜刀法准分子激光角膜上皮瓣下磨镶术角膜混浊 NF-kB通路炎症细胞因子

A promising approach for quantifying focal stroke modeling and assessing stroke progression:optical resolution photoacoustic microscopy photothrombosis

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Neural Regeneration Research 2025年第7期20卷 2029-2037页

作者： xiao Liang Xingping Quan xiaorui Geng Yujing Huang Yonghua Zhao Lei Xi Zhen Yuan Ping wang Bin Liu Faculty of Health Sciences University of MacaoMacao Special Administrative RegionChina Center for Cognitive and Brain Sciences University of MacaoMacao Special Administrative RegionChina Department of Biomedical Engineering Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoTaipaMacao Special Administrative RegionChina Department of Emergency Zhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

To investigate the mechanisms underlying the onset and progression of ischemic stroke,some methods have been proposed that can simultaneously monitor and create embolisms in the animal cerebral ***,these methods often require complex systems and the effect of age on cerebral embolism has not been adequately studied,although ischemic stroke is strongly *** this study,we propose an optical-resolution photoacoustic microscopy-based visualized photothrombosis methodology to create and monitor ischemic stroke in mice simultaneously using a 532 nm pulsed *** observed the molding process in mice of different ages and presented age-dependent vascular embolism ***,we integrated optical coherence tomography angiography to investigate age-associated trends in cerebrovascular variability following a *** imaging data and quantitative analyses underscore the differential cerebrovascular responses to stroke in mice of different ages,thereby highlighting the technique's potential for evaluating cerebrovascular health and unraveling age-related mechanisms involved in ischemic strokes.

关键词： age-dependent cerebral cortex ischemic stroke mouse model optical coherence tomography angiography photoacoustic microscopy photothrombosis vascular imaging

Boosting cationic and anionic redox activity of Li-rich layered oxide cathodes via Li/Ni disordered regulation

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Journal of Energy Chemistry 2025年第1期100卷 533-543页

作者： Zewen Liu Zhen Wu Hao wang Xudong Zhang Yuanzhen Chen Yongning Liu Shengwu guo Shenghua Chen Yanli Nan Yan Liu State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University School of Materials Science and Engineering Xi'an University of Architecture and Technology Hefei Advanced Computing Center Operation Management Corp Ltd Network Information Center Xi'an Jiaotong University

Lithium-rich layered oxides （LLOs） are increasingly recognized as promising cathode materials for nextgeneration high-energy-density lithium-ion batteries （LIBs）.However,they suffer from voltage decay and low initial Coulombic efficiency （ICE） due to severe structural degradation caused by irreversible O ***,we introduce a three-in-one strategy of increasing Ni and Mn content,along with Li/Ni disordering and TM–O covalency regulation to boost cationic and anionic redox activity simultaneously and thus enhance the electrochemical activity of *** target material,Li1.2Ni0.168Mn0.558Co0.074O2（L1）,exhibits an improved ICE of 87.2%and specific capacity of 293.2 mA h g-1and minimal voltage decay of less than 0.53 m V cycle-1over 300 cycles at 1C,compared to Li1.2Ni0.13Mn0.54Co0.13O2（Ls）(274.4 mA h g-1for initial capacity,73.8%for ICE and voltage decay of 0.84 mV/cycle over 300 cycles at 1C).Theoretical calculations reveal that the density of states （DOS） area near the Fermi energy level for L1 is larger than that of Ls,indicating higher anionic and cationic redox reactivity than ***,L1 exhibits increased O-vacancy formation energy due to higher Li/Ni disordering of 4.76%（quantified by X-ray diffraction Rietveld refinement） and enhanced TM–O covalency,making lattice O release more difficult and thus improving electrochemical *** increased Li/Ni disordering also leads to more Ni2+presence in the Li layer,which acts as a pillar during Li+de-embedding,improving structural *** research not only presents a viable approach to designing low-Co LLOs with enhanced capacity and ICE but also contributes significantly to the fundamental understanding of structural regulation in high-performance LIB cathodes.

关键词： Ice

Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

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Journal of Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan Chen Xiu-Qing Qiao guo Hui Bojing Sun Dongfang Hou Meidi wang Xueqian Wu Tao Wu Dong-Sheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Hubei Three Gorges Laboratory College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry Jinan University

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction,Schottky junction,and photothermal *** difference in atomic configuration between cubic-CdS （c-CdS） and hexagonal-CdS （h-CdS） leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge ***,the photothermal effect of Mo2C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H2production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.

关键词： Cadmium sulfide

Electrode/Electrolyte Optimization‑Induced Double‑Layered Architecture for High‑Performance Aqueous Zinc‑(Dual)Halogen Batteries

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Nano-Micro Letters 2025年第3期17卷 121-137页

作者： Chengwang Zhou Zhezheng Ding Shengzhe Ying Hao Jiang Yan wang Timing Fang You Zhang Bing Sun xiao Tang xiaomin Liu School of Textiles and Clothing School of Chemistry and Chemical EngineeringQingdao UniversityQingdao 266071ShandongPeople’s Republic of China Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneyUltimoNSW 2007Australia School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007HenanPeople’s Republic of China

Aqueous zinc-halogen batteries are promising candidates for large-scale energy storage due to their abundant resources,intrinsic safety,and high theoretical ***,the uncontrollable zinc dendrite growth and spontaneous shuttle effect of active species have prohibited their practical ***,a double-layered protective film based on zinc-ethylenediamine tetramethylene phosphonic acid(ZEA)artificial film and ZnF2-rich solid electrolyte interphase(SEI)layer has been successfully fabricated on the zinc metal anode via electrode/electrolyte synergistic *** ZEA-based artificial film shows strong affinity for the ZnF2-rich SEI layer,therefore effectively suppressing the SEI breakage and facilitating the construction of double-layered protective film on the zinc metal *** double-layered architecture not only modulates Zn2+flux and suppresses the zinc dendrite growth,but also blocks the direct contact between the metal anode and electrolyte,thus mitigating the corrosion from the active *** employing optimized metal anodes and electrolytes,the as-developed zinc-(dual)halogen batteries present high areal capacity and satisfactory cycling *** work provides a new avenue for developing aqueous zinc-(dual)halogen batteries.

关键词： Zn metal anodes Double-layered protective film Electrode/electrolyte optimization Aqueous zinc-(dual)halogen batteries

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基于PLC的矿用通风机监控冗余系统设计

煤炭技术 2014年第11期33卷 213-215页

作者：王海山王小国王万德贵州永润煤业有限公司贵州安顺561001

主要针对当前我国井下煤矿综采作业中,基于单个PLC控制的通风机监控系统存在的安全隐患问题展开研究和分析。通过构建基于2个PLC的通风机监控冗余系统方案,采用"主站+备站"的模式,进一步提高了井下通风机监控系统的工作稳定性和可靠性,... 详细信息

主要针对当前我国井下煤矿综采作业中,基于单个PLC控制的通风机监控系统存在的安全隐患问题展开研究和分析。通过构建基于2个PLC的通风机监控冗余系统方案,采用"主站+备站"的模式,进一步提高了井下通风机监控系统的工作稳定性和可靠性,保证了井下作业的安全生产。

关键词： PLC 通风机监控冗余系统