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Recent Progress on Water-based Liquid Embolic Agents in Endovascular Treatment

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Chemical Research in Chinese Universities 2024年第5期40卷 776-785页

作者： QI Yi fan Hailong Department of Neurosurgery Faculty of Medicine and Graduate School of MedicineHokkaido UniversitySapporo060-8638Japan Institute for Chemical Reaction Design and Discovery(WPI-ICReDD) Hokkaido UniversitySapporo001-0021Japan

Vascular embolization treatment,a minimally invasive surgery for various blood vessel-related conditions,has emerged as a crucial method in treating such as hemorrhage,arteriovenous malformation,aneurysms,and hypervascular *** embolic agents are gaining prominence due to their distinct advantage in infiltrating distal regions,expanding the scope of embolization beyond the reach of solid *** strides in biomaterials and technologies have spurred the development of novel liquid embolic agents,addressing challenges posed by traditional *** mini-review provides a concise overview of the recent progress in water-based liquid embolic agents,highlighting their potential to overcome limitations associated with current embolic *** presenting selected research outcomes,we illuminate advancements that enhance the efficacy of liquid embolic ***,the review outlines essential properties for effective liquid embolic agents,offering insights for future developments in this field.

关键词： Endovascular treatment Lquid embolic agent Hydrogel

Electrocatalytic CO_(2)reduction to syngas

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Green Energy & Environment 2024年第7期9卷 1085-1100页

作者： Bing Chang Zhaojun Min Ning Liu Nan Wang Maohong fan Jing fan Jianji Wang School of Environment Key Laboratory of Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiangHenan453007China School of Chemistry and Chemical Engineering Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationHenan Normal UniversityXinxiangHenan453007China College of Engineering and Physical Sciences and School of Energy ResourcesUniversity of WyomingLaramieWY82071USA College of Engineering Georgia Institute of TechnologyAtlantaGA30332USA

While carbon dioxide(CO_(2))is a major greenhouse gas,it is also an important C1 *** the trend of energy conservation and emission reduction,electrocatalytic reduction has become a very promising strategy for CO_(2)utilization because it can convert CO_(2)directly to high-valued chemicals and fuels under mild *** particular,the product CO and by-product H_(2)can be combined into syngas by an electrocatalytic CO_(2)reduction reaction(CO_(2)RR)in an aqueous *** molar ratios of CO and H_(2)may be used to produce essential bulk chemicals or liquid fuels such as methanol,alkanes,and olefins through thermochemical catalysis,Fischer-Tropsch synthesis,microbial fermentation,and other *** work discusses the latest strategies in controlling the molar ratio of CO/H_(2)and improving the yield of CO_(2)*** challenges of electrocatalytic syngas production are analyzed from an industrial application perspective,and the possible measures to overcome them are proposed in terms of new catalyst design,electrolyte innovation,flow reactor optimization,anodic reaction coupling,and operando technique application.

关键词： Electrocatalysis CO_(2)reduction Syngas Electrolyte Electrolyzer

Observation of an upward lightning flash with 21 upward positive leaders initiated from different wind turbines in wind farm

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High Voltage 2024年第1期9卷 163-171页

作者： Li Cai Yifeng Ke Wenchao fan Ruisheng Yan Mi Zhou Jianguo Wang Yadong fan Engineering Research Center of Ministry of Education for Lightning Protection and Grounding Technology School of Electrical Engineering and AutomationWuhan UniversityWuhanChina

As the wind turbine height increases,the probability of multiple upward leaders flashes within the wind farm *** this study,an upward lightning flash containing 21 upward positive leaders(UPLs)initiated from different wind turbines in Zhangbei Wind Farm was *** average speed of the UPLs was 1.2×10^(5) m/s,which mostly decreased to zero before reaching the cloud *** four UPLs developed to cloud height,with prolonged periods of bright light on three of them and with a minimum duration of 126 ms.A total of nine return strokes occurred on the other two dissipated leader channels,and the numbers of strokes on the two channels was six and three,*** average interstroke interval for the return strokes was 10.5 *** of these nine return strokes had peak currents smaller than 10 *** high-speed video frames confirmed that competition does exist between the UPLs,and the range of shielding effects increases as the height of the ULs *** effect of fan rotation on the initiation of upward leaders and the shielding effect between the wind turbines and upward leaders are discussed.

关键词： flash return initiated

Process in laser drilling of deep microholes without taper on metal materials

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Science China(Technological Sciences) 2024年第1期67卷 37-59页

作者： fan RunZe MEI XueSong CUI JianLei State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710054China

Deep microhole machining is currently a prominent research area within the aerospace field,encompassing blade film cooling and fuel injection control ***,taper defects in metal materials may lead to performance degradation or even structural damage over a component’s *** and helical drilling,facilitated by ultrashort pulse lasers,have proven more suitable for achieving high-precision,deep holes in metal ***,excessive repetition rates can also result in severe thermal *** methods are commonly employed for controlling taper,including parameter optimization,assistance,and secondary *** laser beam drilling is widely utilized and has been integrated into relevant machining systems for commercial *** deep microholes include film cooling holes and injection *** drilling is a potential machining method for new materials in the aerospace *** laser drilling processing has been studied,numerous related scientific challenges and technical difficulties must be addressed before practical implementation.

关键词： aerospace laser drilling deep microhole taper control

In memory of Robie ***(1948-2022):A scientist and a friend

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Environmental Science and Ecotechnology 2024年第2期18卷 4-6页

作者： Yi-fan Li 不详

On February 17,2022,I received an email from Julie Henderson,the life partner of Robie *** her email,she conveyed the following message:"Hello Yifan,Rob asked me to especially let you know that when he had *** admired and enjoyed working with you."As I read those words,tears welled up in my eyes,overwhelmed by profound *** was not only my scientific research colleague but also my closest *** had collaborated for more than two decades.

关键词： email friend partner

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常见微塑料的自然光解老化

环境化学 2021年第6期40卷 1741-1748页

作者：周崇胜范铭煜丁云浩谷成王超南京大学环境学院南京210023

微塑料是一种新型环境污染物,对生态环境有重要的影响.本研究分析了几种常见塑料产品的主要成分,并探究了自然光解老化前后微塑料红外光谱的变化情况.通过与标准谱图比对,所选塑料样品分别属于聚乙烯(PE)、聚丙烯(PP)和聚对苯二甲酸乙... 详细信息

微塑料是一种新型环境污染物,对生态环境有重要的影响.本研究分析了几种常见塑料产品的主要成分,并探究了自然光解老化前后微塑料红外光谱的变化情况.通过与标准谱图比对,所选塑料样品分别属于聚乙烯(PE)、聚丙烯(PP)和聚对苯二甲酸乙二醇酯(PET).红外结果表明,微塑料老化基本都伴随苯环、羰基与羟基的生成.此外,微塑料自然光解老化后表面发生龟裂,比表面积增加,亲水性增强.微塑料表面结构的变化势必造成微塑料环境行为的改变.因此,探究不同微塑料光解老化过程可以为分析其潜在的环境行为提供理论指导.

关键词：微塑料自然光照老化红外光谱

Holographic superfluid ring with a weak link

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Science China(Physics,Mechanics & Astronomy) 2024年第11期67卷 29-38页

作者： Zhi-Hong Li Huai-fan Li Department of Physics Shanxi Datong UniversityDatong 037009China Institute of Theoretical Physics Shanxi Datong UniversityDatong 037009China

We explore the generation of topological defects in the course of a dynamical phase transition in a ring with a weak link, i.e., a SSS Josephson junction, from the AdS/CFT correspondence. By setting different parameters of the junction(width, steepness,depth) and the final temperature of the quench, the configurations of the charge density and condensate of the order parameters of the dual field theory are presented. Meanwhile, we observe that in the final equilibrium state, variations in parameters of the junctions only affect the configurations of the charge density and condensate of the order parameters, without altering their values outside the junction. However, variations in the final temperature will directly affect the values of the charge density and condensate of the order parameters outside of the junction. Moreover, in the final equilibrium state, we propose an analytic relation between the gauge-invariant velocity in the two superconducting states in the SSS Josephson junction, which agrees well with the numerical results.

关键词： AdS/CFT correspondence holographic superfluid holographic Josephson junction

Nearly degenerate ground states of a checkerboard antiferromagnet and their bosonic interpretation

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 84-89页

作者： Haiyuan Zou fan Yang Wei Ku Key Laboratory of Polar Materials and Devices(MOE) School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Department of Physics Beijing Institute of TechnologyBeijing 100081China Tsung-Dao Lee Institute Shanghai 200240China Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shanghai 200240China Shanghai Branch Hefei National LaboratoryShanghai 201315China

The spin-1/2 model system with antiferromagnetic(AF) couplings on a J1-J2checkerboard lattice, known as the planar pyrochlore model, is strongly frustrated and associated with a two-to-one dimensional crossover. Using the Projected Entangled Simplex States tensor network ansatz, we identify a large number of nearly degenerate states in the frustrated region(J_(1)

关键词： tensor networks frustrated magnetism dimensional crossover degenerate states

Engineering tantalum nitride for efficient photoelectrochemical water splitting

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Science China Chemistry 2024年第7期67卷 2171-2180页

作者： Beibei Zhang Zeyu fan Yanbo Li Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

Photoelectrochemical(PEC)water splitting is a promising energy conversion strategy for directly converting solar energy into green hydrogen *** an efficient PEC device,finding an efficient photoanode material with a suitable band gap and favorable band-edge positions is *** nitride(Ta_(3)N_(5))meets these fundamental requirements,and its theoretical maximum solar-to-hydrogen(STH)conversion efficiency can reach 15.9%.Consequently,it has been widely applied as a photoanode material for the PEC oxygen evolution reaction(OER).However,severe bulk and interface charge recombination,along with sluggish water oxygen kinetics,seriously limits its STH conversion efficiency for PEC water ***,this feature article briefly reviews recent advances by our research group in improving the STH conversion efficiency of the Ta_(3)N_(5)photoanode using various strategies,including defect engineering,construction of a gradient band structure,interface engineering,and surface modification of self-healing OER *** to now,the obtained half-cell STH efficiency has exceeded 4%,providing a solid foundation for the development of tandem PEC devices for unbiased solar-driven overall water splitting toward practical application.

关键词： Photoelectrochemical water splitting tantalum nitride defect engineering interface engineering oxygen evolution cocatalyst