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Unimolecular Self-Assembled Hemicyanine-Oleic Acid Conjugate Acts as a Novel Succinate Dehydrogenase Inhibitor to Amplify Photodynamic Therapy and Eliminate Cancer Stem Cells

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Research 2024年第2期6卷 449-461页

作者： Qiang Wang Tian Yang shiyou li Chen Xu Chong Wang Yuxuan Xiong Xing Wang Jiangling Wan Xiangliang Yang Zifu li National Engineering Research Center for Nanomedicine College of Life Science and Technology.Huazhong University of Science and TechnologyWuhan 430074P.R.China Key Laboratory of Molecular Biophysics of Ministry of Education College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074P.R.China .3Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medical Huazhong University of Science and TechnologyWuhan 430074P.R.China Hubei Engineering Research Center for Biomaterials and Medical Protective Materials Huazhong University of Science and TechnologyWuhan 430074P.R.China Hubei Bioinformatics and Molecular Imaging Key Laboratory College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074P.R.China

Photodynamic therapy with reactive oxygen species production is a prospective treatment to combat cancer stem cells(CSCs).However,the innate drawbacks,including short lifetime and diffusion distance of reactive oxygen species and hypoxia within solid tumors,have become bottlenecks for clinical applications of photodynamic ***,we develop a mitochondria-targeting hemicyanine-oleic acid conjugate(CyOA),which can self-assemble into supramolecular nanoparticles(NPs)without any exogenous *** is also shown for targeting the mitochondrial complex II protein succinate dehydrogenase to inhibit oxidative phosphorylation and reverse tumor hypoxia,resulting in 50.4-fold higher phototoxicity against breast cancer stem cells(BCSCs)compared to SO_(3)-CyOA NPs that cannot target to *** 4T1 and BCSC tumor models,CyOA NPs achieve higher tumor inhibition and less lung metastasis nodules compared to the clinically used photosensitizer *** study develops a self-assembled small molecule that can serve as both oxidative phosphorylation inhibitor and photosensitizer for eradication of CSCs and treatment of solid tumors.

关键词： cyanine oxidative treatment

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离子液体热合成法制备钒酸铁及其电化学性能

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精细化工 2024年第6期41卷 1354-1361页

作者：赵鹬李忠英雷福红张宇婷李世友兰州理工大学石油化工学院甘肃兰州730050

以离子液体1-丁基-3-甲基咪唑酸溴盐([Bmim]Br)为反应溶剂,采用离子液体热合成法制备了钒酸铁前驱体,通过煅烧和后处理成功地合成了粒径均一、排布密集的FeVO_(4)纳米颗粒。采用SEM、XRD、XPS、TEM、N_(2)吸附-脱附对材料的结构和形貌... 详细信息

以离子液体1-丁基-3-甲基咪唑酸溴盐([Bmim]Br)为反应溶剂,采用离子液体热合成法制备了钒酸铁前驱体,通过煅烧和后处理成功地合成了粒径均一、排布密集的FeVO_(4)纳米颗粒。采用SEM、XRD、XPS、TEM、N_(2)吸附-脱附对材料的结构和形貌进行了表征。以FeVO_(4)纳米颗粒为负极材料构建了锂离子电池,采用恒流充电放电测试、循环伏安法(CV)和电化学阻抗对电池进行了电化学性能评价。结果表明,Fe VO_(4)电极作为锂离子电池负极材料在高电流密度下表现出优异的循环性能和电化学性能,其在300 mA/g电流密度下的初始放电比容量为1471.58 mA·h/g,在300 mA/g下循环100次后,仍获得783.00 mA·h/g的高比容量,其优异的电化学性能可能归因于电极材料的纳米级尺寸。

关键词：钒酸铁离子液体热合成法锂离子电池负极材料有机电化学

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正极预锂化添加剂用于锂离子电池的研究进展

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储能科学与技术 2024年第3期13卷 759-769页

作者：武美玲牛磊李世友赵冬妮兰州理工大学石油化工学院甘肃省低碳能源化工重点实验室甘肃兰州730050

锂离子电池因其能量密度高和循环寿命长等优点,在电子产品和电动汽车等领域被广泛应用。然而,锂离子电池首次充放电过程中负极表面固态电解质界面(SEI)膜的形成会永久地消耗正极材料中的活性锂,造成不可逆的容量损失,进而降低电池首次... 详细信息

锂离子电池因其能量密度高和循环寿命长等优点,在电子产品和电动汽车等领域被广泛应用。然而,锂离子电池首次充放电过程中负极表面固态电解质界面(SEI)膜的形成会永久地消耗正极材料中的活性锂,造成不可逆的容量损失,进而降低电池首次库仑效率。已有的研究表明,预锂化技术可使电池首次库仑效率得到有效提高。在众多预锂化技术中,正极添加剂预锂化具有工艺简单、价格低廉和安全性高等优点,因此具有较为广阔的应用前景。鉴于此,本综述介绍了三类正极预锂化添加剂:三元富锂化合物、二元锂化合物和基于逆转化反应的纳米复合材料的基本工作原理和限制其发展的关键科学问题,着重归纳了近年来在预锂化添加剂材料性能优化,储能机理研究方面的研究进展和亟待解决的问题,指出了补锂添加剂在补偿首次容量损失方面的重要性,并对该方法的发展进行了展望。本文在总结当前研究进展的基础上,对正极预锂化添加剂未来的研究思路和发展方向进行了展望,提出了进一步研究预锂化添加剂的合成条件和改性策略,在不以容量牺牲为代价的前提下提升补锂添加剂的环境稳定性或开发一种新型的电解液添加剂,解决预锂化添加剂首次循环时残留物或产气对电池长循环性能的影响。这些策略有望进一步推动力离子电池的发展。

关键词：锂离子电池固态电解质界面膜补锂技术正极补锂首次库仑效率

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滇西北地区典型苔藓植物的引燃特性研究

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消防科学与技术 2024年第4期43卷 541-545页

作者：许行健白磊普思伟李世友西南林业大学消防研究所云南昆明650224 云南省森林灾害预警与控制重点实验室云南昆明650224

为研究地表苔藓植物的引燃特性,以滇西北地区广泛分布的多蒴曲尾藓、锦丝藓为试验对象,以香烟和柱香作为引火源,在森林防火紧要期,研究了2种苔藓植物在不同试验条件下的引燃率。利用SPSS Statistics 27.0建立多元线性回归方程,并对该回... 详细信息

为研究地表苔藓植物的引燃特性,以滇西北地区广泛分布的多蒴曲尾藓、锦丝藓为试验对象,以香烟和柱香作为引火源,在森林防火紧要期,研究了2种苔藓植物在不同试验条件下的引燃率。利用SPSS Statistics 27.0建立多元线性回归方程,并对该回归方程进行了检验。分析结果表明,各影响因素对多蒴曲尾藓引燃率影响程度大小排序为热释放速率>火源燃烧速率>苔藓含水率>火源直径>气温>相对湿度,对锦丝藓引燃率影响程度大小排序为苔藓含水率>气温>火源燃烧速率>火源直径>相对湿度>热释放速率。多蒴曲尾藓、锦丝藓模型拟合优度分别为0.820、0.893。通过残差分析得知,多蒴曲尾藓、锦丝藓引燃率预测结果误差分布为±8.895%、±5.845%。研究结果可以为滇西北地区地表可燃物的管理、火险预警等提供依据,为深入开展苔藓植物的火灾风险辨识与评价奠定基础。

关键词：滇西北地区苔藓香烟柱香引燃特性

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巨菌草加工处理及其在畜禽养殖中的应用研究进展

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黑龙江畜牧兽医 2024年第10期 22-26页

作者：刘兴能马燕茹保志鹏李石友席冬梅邓卫东曹国春云南农业职业技术学院畜牧兽医学院昆明650201 云南农业大学动物科学技术学院昆明650201

近年来,畜禽养殖业的快速发展使得“人畜争粮”矛盾加剧,因此,从事畜禽养殖的人员必须树立“大食物观”,全方位、多途径发掘饲草资源。巨菌草因产量高、生长快、营养丰富、适口性好已经成为畜禽饲草资源研究的热点。文章综述了巨菌草的... 详细信息

近年来,畜禽养殖业的快速发展使得“人畜争粮”矛盾加剧,因此,从事畜禽养殖的人员必须树立“大食物观”,全方位、多途径发掘饲草资源。巨菌草因产量高、生长快、营养丰富、适口性好已经成为畜禽饲草资源研究的热点。文章综述了巨菌草的生物学特性、不同加工处理方式对巨菌草营养价值的影响及巨菌草在畜禽养殖中的应用,旨在为巨菌草在畜禽养殖业中的推广应用提供理论基础。

关键词：巨菌草青贮生物发酵畜禽养殖饲草资源粗蛋白

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钠离子电池层状正极材料的相变研究进展

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盐湖研究 2024年第4期32卷 82-90页

作者：樊晓琦童逸凡王梦雅李世友甘肃省低碳能源化工重点实验室甘肃兰州730050 兰州理工大学石油化工学院甘肃兰州730050

近年来,随着锂离子电池的大规模商业化应用,锂资源储量短缺和价格上涨的问题引起了广泛关注。钠离子电池因其钠储量丰富、能量密度可观、成本低廉等优势,在未来大规模储能装置的应用中前景广阔。正极材料是影响钠离子电池性能的关键因素... 详细信息

近年来,随着锂离子电池的大规模商业化应用,锂资源储量短缺和价格上涨的问题引起了广泛关注。钠离子电池因其钠储量丰富、能量密度可观、成本低廉等优势,在未来大规模储能装置的应用中前景广阔。正极材料是影响钠离子电池性能的关键因素,其中层状氧化物正极材料因具有高比容量、高工作电压、环境友好等优点而备受青睐。然而由于其脱嵌钠过程中易发生有害的相变导致电池的循环性能欠佳,制约着钠离子电池规模化应用于储能体系。因此,文章介绍了层状氧化物正极材料的结构分类,概述了材料在钠脱嵌时发生的相变历程,揭示层状氧化物正极材料相变机理及其对电化学性能的影响,最后提出了可以抑制相变的改性策略,并对层状氧化物正极材料的应用前景进行了展望。

关键词：钠离子电池正极材料层状氧化物相变改性

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Design and performance improvement of SiNPs@graphene@C composite with a popcorn structure

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Journal of Energy Chemistry 2022年第9期31卷 405-415,I0012页

作者： Hong Dong Feifei Zong Jie Wang Hao Ding Peng Wang Ru Song Ningshuang Zhang Xuchun Cui shiyou li School of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050GansuChina Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province Lanzhou 730050GansuChina Gansu Engineerin Laboratory of Cathode Material for lithium-ion Battery Baiyin 730900GansuChina

Silicon anodes are considered to be the most promising alternatives owing to their theoretical specific capacity,which is almost 10 times higher than that of graphite ***,huge volume changes during charging and discharging affect their interface stability,which strongly limits their application in commercial ***,a popcorn-structured silicon-carbon composite(SiNPs@graphene@C),composed of silicon nanoparticles(SiNPs),graphene spheres and pitch-based carbon,is prepared by spraydrying followed by a wet *** resulting SiNPs@graphene@C composite has good flexibility and elastic-strain capacity due to the graphene substrate,and it possesses macrostructural integrity and mechanical stability during cycling due to the rigid carbon–carbon chemical *** a result,it shows a discharge-specific capacity of 481.3 mAh g^(-1)and a capacity retention of 82.9%after 500 cycles at 1 A g^(-1).Besides,the initial coulomb efficiency is increased from 65.7%to 86.5%by pre-lithiation,which improves the feasibility of commercialising the SiNPs@graphene@C composite.

关键词： SiNPs@graphene@C Popcorn structure Pre-lithiation

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Distributed Resource Allocation in Dispersed Computing Environment Based on UAV Track Inspection in Urban Rail Transit

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Computers, Materials & Continua 2024年第7期80卷 643-660页

作者： Tong Gan Shuo Dong shiyou Wang Jiaxin li Division of Consulting Beijing Metro Consultancy Corporation Ltd.Beijing100037China Department of Computer and Communication Engineering University of Science and Technology BeijingBeijing100083China

With the rapid development of urban rail transit,the existing track detection has some problems such as low efficiency and insufficient detection coverage,so an intelligent and automatic track detectionmethod based onUAV is urgently needed to avoid major safety *** the same time,the geographical distribution of IoT devices results in the inefficient use of the significant computing potential held by a large number of *** a result,the Dispersed Computing(DCOMP)architecture enables collaborative computing between devices in the Internet of Everything(IoE),promotes low-latency and efficient cross-wide applications,and meets users’growing needs for computing performance and service *** paper focuses on examining the resource allocation challenge within a dispersed computing environment that utilizes UAV inspection ***,the system takes into account both resource constraints and computational constraints and transforms the optimization problem into an energy minimization problem with computational *** Markov Decision Process(MDP)model is employed to capture the connection between the dispersed computing resource allocation strategy and the system ***,a method based on Double Deep Q-Network(DDQN)is introduced to derive the optimal ***,an experience replay mechanism is implemented to tackle the issue of increasing *** experimental simulations validate the efficacy of the method across various scenarios.

关键词： UAV track inspection dispersed computing resource allocation deep reinforcement learning Markov decision process

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Mechanism of high-concentration electrolyte inhibiting the destructive effect of Mn(Ⅱ)on the performance of lithium-ion batteries

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Journal of Energy Chemistry 2023年第3期78卷 381-392,I0011页

作者： Xiaoling Cui Jinlong Sun Dongni Zhao Jingjing Zhang Jie Wang Hong Dong Peng Wang Junwei Zhang Shumin Wu linhu Song Ningshuang Zhang Chunlei li shiyou li School of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050GansuChina Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province Lanzhou 730050GansuChina Gansu Engineering Laboratory of Electrolyte Material for lithium-ion Battery Baiyin 730900GansuChina

By optimizing electrolyte formulation to inhibit the deposition of transition metal ions(TMIs) on the surface of the graphite anode is an effective way to improve the electrochemical performance of lithium-ion *** present,it is generally believed the formation of an effective interfacial film on the surface of the anode electrode is the leading factor in reducing the dissolution of TMIs and prevent TMIs from being embedded in the *** ignores the influence of the solvation structures in the electrolyte system with different composition,and is not conducive to the design of the electrolyte formulation from the perspective of changing the concentration and the preferred solvent to inhibit the degradation of battery performance caused by TMIs *** this work,by analyzing the special solvation structures of the high-concentra tion electrolyte,we study the main reason why high-concentration electrolyte inhibits the destructive effect of Mn(Ⅱ) on the electrochemical performance of *** combining the potentialresolved in-situ electrochemical impedance spectroscopy technology(PRIs-EIS) and density functional theory(DFT) calculation,we find that Mn(Ⅱ) mainly exists in the form of contact ions pairs(CIPs) and aggregates(AGGs) in high-concentration *** solvation structures can reduce the destructive effect of Mn(Ⅱ) on battery performance from two aspects:on the one hand,it can rise the lowest unoccupied orbital(LUMO) value of the solvation structures of Mn(Ⅱ),thereby reducing the chance of its reduction;on the other hand,the decrease of Mn2+ions reduction can reduce the deposition of metallic manganese in the solid electrolyte interphase(SEI),thereby avoiding the continuous growth of the *** study can be provided inspiration for the design of electrolytes to inhibit the destructive effect of TMls on liBs.

关键词： lithium-ion battery High-concentration electrolyte Manganese deposition Solvation structures

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Enhanced conductivity and stability of Prussian blue cathodes in sodium-ion batteries by surface vapor-phase molecular selfassembly

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Nano Research 2024年第5期17卷 4221-4230页

作者： Tao Yuan Xiaopan Fu Yuan Wang Mingjie li Shuixin Xia Yuepeng Pang shiyou Zheng School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China

With many merits such as facile synthesis,economy,and relatively high theoretical capacity,Prussian blue analogs(PBAs)are considered promising cathode materials for sodium-ion batteries(SIBs).However,their practical applications still suffer from a low actual specific capacity and inferior stability owing to the imperfect crystallinity,irreversible phase transition,and low intrinsic ***,a surface-modification technique for vapor-phase molecular self-assembly was developed to prepare Fe-based PBAs,specifically sodium iron hexacyanoferrate(NaFeHCF),with a uniform conductive polymer protective layer of polypyrrole(PPy)on the surface,resulting in NaFeHCF@*** incorporation of a PPy protective layer not only improves the electronic conductivity of NaFeHCF@PPy,but also effectively mitigates the dissolution of Fe-ions during ***,this advanced vapor-phase technique avoids Fe^(2+)oxidation and Na^(+)loss during liquid-phase surface *** NaFeHCF@PPy exhibited a remarkably enhanced cycling performance,with capacity retentions of 85.6%and 69.1%over 500 and 1000 cycles,respectively,at 200 mA/g,along with a superior rate performance up to 5 A/g(fast kinetics).Additionally,by adopting this strategy for Mn-based PBAs(NaMnHCF@PPy),we further demonstrated the universality of this method for PBA cathodes in SIBs.

关键词： sodium-ion battery cathode Prussian blue analogs surface modification vapor-phase molecular self-assembly

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