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Detection and Characterization of Non-covalent Complex between Lappaconitine and β-Cyclodextrin by Electrospray Ionization Tandem Mass Spectrometry

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Chinese Chemical Letters 2006年第1期17卷 65-68页

作者： qing xuan XU li li Hao YUE Zhi Qiang liU Ming Quart GUO Shu Ying liU Laboratory of New Drug Research and Mass Spectrometry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022

The non-covalent complexes between lappaconitine （LA） and β-cyclodextrin （β-CD） have been detected and characterized by electrospray ionization combined with ion trap tandem mass spectrometry （ESI-MSn）. The experimental results showed that only 1：1 non-covalent complex can be formed in different starting molar ratios of LA to β-CD. Furthermore, the diagnostic fragmentation of the β-CD-LA complex, with a significant contribution of covalent fragmentation of LA leaving the N-acetyl anthranoyl （AN） moiety inserted to β-CD, provided the convincing evidence for the formation of non-covalent complex between LA and β-CD and the cite of LA molecule included to cavity of β-CD assigned to AN residue.

关键词： Lappaconitine β-cyclodextrin non-covalent complex ESI-MS CID.

Ferroelectric artificial synapse for neuromorphic computing and flexible applications

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Fundamental Research 2023年第6期3卷 960-966页

作者： qing-xuan li Yi-Lun liu Yuan-Yuan Cao Tian-Yu Wang Hao Zhu li Ji Wen-Jun liu qing-qing Sun David Wei Zhang lin Chen State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China National Integrated Circuit Innovation Center No.825 Zhangheng RoadShanghai 201203China

Research of artificial synapses is increasing in popularity with the development of bioelectronics and the appearance of wearable *** the high-temperature treatment process of inorganic materials is not compatible with flexible substrates,organic ferroelectric materials that are easier to process have emerged as *** organic synaptic device based on P(VDF-TrFE)was prepared in this *** device showed reliable P/E endurance over 104 cycles and a data storage retention capability at 80℃ over 104 ***,it possessed excellent synaptic functions,including short-term/long-term synaptic plasticity and spike-timing-dependent *** addition,the ferroelectric performance of the device remained stable even under bending(7 mm bending radius)or after 500 bending *** work shows that low-temperature processed organic ferroelectric materials can provide new ideas for the future development of wearable electronics and flexible artificial synapses.

关键词： Organic artificial synapse Neuromorphic computing Synaptic devices Wearable electronics Ferroelectric

Photoluminescence of green InGaN/GaN MQWs grown on pre-wells

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Chinese Physics B 2020年第12期29卷 492-497页

作者： Shou-Qiang Lai qing-xuan li Hao Long Jin-Zhao Wu Lei-Ying Ying Zhi-Wei Zheng Zhi-Ren Qiu and Bao-Ping Zhang School of Electronic Science and Engineering Xiamen UniversityXiamen 361005China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China

Photoluminescence(PL)characteristics of the structure consisting of green InGaN/GaN multiple quantum wells(MQWs)and low indium content InGaN/GaN pre-wells are *** PL peaks from pre-wells and green InGaN/GaN MQWs are *** peak energy values for both pre-wells and green InGaN/GaN MQWs display an S-shaped variation with *** addition,the differences in the carrier localization effect,defect density,and phonon-exciton interaction between the pre-wells and green InGaN/GaN MQWs,and the internal quantum efficiency of the sample are *** obtained results elucidate the mechanism of the luminescence characteristics of the sample and demonstrate the significant stress blocking effect of pre-wells.

关键词： InGaN/GaN photoluminescence pre-wells green LED

Cell polarization in ischemic stroke: molecular mechanisms and advances

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Neural Regeneration Research 2025年第3期20卷 632-645页

作者： Yuanwei li Xiaoxiao Xu xuan Wu Jiarui li Shiling Chen Danyang Chen Gaigai li Zhouping Tang Department of Neurology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Ischemic stroke is a cerebrovascular disease associated with high mortality and disability rates. Since the inflammation and immune response play a central role in driving ischemic damage, it becomes essential to modulate excessive inflammatory reactions to promote cell survival and facilitate tissue repair around the injury site. Various cell types are involved in the inflammatory response, including microglia, astrocytes, and neutrophils, each exhibiting distinct phenotypic profiles upon stimulation. They display either proinflammatory or anti-inflammatory states, a phenomenon known as ‘cell polarization.’ There are two cell polarization therapy strategies. The first involves inducing cells into a neuroprotective phenotype in vitro, then reintroducing them autologously. The second approach utilizes small molecular substances to directly affect cells in vivo. In this review, we elucidate the polarization dynamics of the three reactive cell populations(microglia, astrocytes, and neutrophils) in the context of ischemic stroke, and provide a comprehensive summary of the molecular mechanisms involved in their phenotypic switching. By unraveling the complexity of cell polarization, we hope to offer insights for future research on neuroinflammation and novel therapeutic strategies for ischemic stroke.

关键词： astrocyte polarization immune regulation inflammation ischemic injury microglia polarization neutrophil polarization signaling pathways stroke

Wafer‑Scale Vertical 1D GaN Nanorods/2D MoS_(2)/PEDOT:PSS for Piezophototronic Effect‑Enhanced Self‑Powered Flexible Photodetectors

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Nano-Micro Letters 2025年第3期17卷 102-116页

作者： Xin Tang Hongsheng Jiang Zhengliang lin xuan Wang Wenliang Wang Guoqiang li State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Department of Electronic Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China

van der Waals(vdW)heterostructures constructed by lowdimensional(0D,1D,and 2D)materials are emerging as one of the most appealing systems in next-generation flexible ***,hand-stacked vdW-type photodetectors are not compatible with large-areaarray fabrication and show unimpressive performance in self-powered ***,vertical 1D GaN nanorods arrays(NRAs)/2D MoS_(2)/PEDOT:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays *** as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W^(−1)and a high detectivity of 1.2×10^(11)Jones,as well as a fast response speed of 54/71μs,thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II ***,the strain-tunable photodetection performances of device have been ***,the device at−0.78%strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W^(−1),a detectivity of 2.6×10^(11)Jones,and response times of 40/45μs,which are superior to the state-of-the-art self-powered flexible *** work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection,which performs well in flexible sensors.

关键词： Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors

Effect of pyrite content on chalcopyrite flotation under different regrinding conditions

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 49-57页

作者： Zejun Wang qing Shi Guofan Zhang Yuxuan Zhu Binbin li School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China

This study aimed to investigate the effect of varying pyrite(Py)content on copper(Cu)in the presence of different regrinding conditions,which were altered using different types of grinding media:iron,ceramic balls,and their mixture,followed by flotation in the cleaner *** flotation performance of rough Cu concentrate can be improved by changing the regrinding conditions based on the Py *** electron microscopy,X-ray spectrometry,ethylenediaminetetraacetic acid disodium salt extraction,and X-ray photoelectron spectroscopy studies illustrated that when the Py content was high,the use of iron media in regrinding promoted the generation of hydrophilic Fe OOH on the surface of Py and improved the Cu *** ceramic medium with a low Py content prevented excessive Fe OOH from covering the surface of chalcopyrite(Cpy).Electrochemical studies further showed that the galvanic corrosion current of Cpy-Py increased with the addition of Py and became stronger with the participation of iron media.

关键词： chalcopyrite regrinding media pyrite galvanic corrosion flotation

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多孔铜尺度对其叠氮化反应的影响

含能材料 2016年第10期24卷 995-999页

作者：李兵曾庆轩李明愉吴兴宇北京理工大学爆炸科学与技术国家重点实验室北京100081

为了研究多孔铜尺度对其叠氮化反应的影响,根据铜叠氮化物与单质铜在50℃、0.5 mol·L^(-1)稀盐酸溶液中的不同溶解性,利用电感耦合等离子体发射光谱仪(ICP)分析了不同粒径的铜颗粒以及粒径在200 nm左右、厚度0.2~0.3 mm、密度为1.51 g... 详细信息

为了研究多孔铜尺度对其叠氮化反应的影响,根据铜叠氮化物与单质铜在50℃、0.5 mol·L^(-1)稀盐酸溶液中的不同溶解性,利用电感耦合等离子体发射光谱仪(ICP)分析了不同粒径的铜颗粒以及粒径在200 nm左右、厚度0.2~0.3 mm、密度为1.51 g·cm^(-3)左右的块状多孔铜与气体叠氮酸的反应特性。结果表明,当铜颗粒尺寸约0.5μm时,其平均转化率为95.64%,基本能与气体叠氮酸完全反应;当多孔铜厚度为0.2 mm时,其叠氮化的转化率大于97%。

关键词：转化率铜颗粒块状多孔铜气体叠氮酸

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

对《促进发展的投资便利化协定》的评价及中国的因应策略

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国际商务研究 2025年第1期46卷 46-58页

作者：李轩东北师范大学吉林长春130117

经过世界贸易组织多年的努力,2024年2月,《促进发展的投资便利化协定》被宣布正式达成,这是世界贸易组织在多边投资谈判领域中的重大突破。该协定在促进资本跨境自由流动、推动全球经济可持续发展、改善全球治理、缓解“南北不平衡”等... 详细信息

经过世界贸易组织多年的努力,2024年2月,《促进发展的投资便利化协定》被宣布正式达成,这是世界贸易组织在多边投资谈判领域中的重大突破。该协定在促进资本跨境自由流动、推动全球经济可持续发展、改善全球治理、缓解“南北不平衡”等方面都有重要意义。随着该协定的逐步完善和落实,全球更多的经济体将会受益于它带来的红利。但是,该协定在执行过程中也面临着各种挑战,诸如协定执行成本巨大、国际投资保护主义抬头等。中国作为该协定的主要发起国,要加强投资便利化的制度建设和功能建设,积极履行国际承诺,为实现全球经济可持续发展做出重要贡献。

关键词：世界贸易组织《促进发展的投资便利化协定》制度建设启示