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Journal of Energy Chemistry 2024年第8期95卷 540-553页

作者： Yihan Lin liheng Li Longjie Tan Yongliang Li Xiangzhong Ren Peixin Zhang Chuanxin He Lingna sun College of Chemistry and Environmental Engineering Shenzhen University

Although lithium-sulfur batteries（LSBs） exhibit high theoretical energy density,their practical application is hindered by poor conductivity of the sulfur cathode,the shuttle effect,and the irreversible deposition of Li2S.To address these issues,a novel composite,using electrospinning technology,consisting of Fe3Se4and porous nitrogen-doped carbon nanofibers was designed for the interlayer of LSBs.The porous carbon nanofiber structure facilitates the transport of ions and electrons,while the Fe3Se4material adsorbs lithium polysulfides（LiPSs） and accelerates its catalytic conversion process.Furthermore,the Fe3Se4material interacts with soluble LiPSs to generate a new polysulfide intermediate,LixFeSycomplex,which changes the electrochemical reaction pathway and facilitates the three-dimensional deposition of Li2S,enhancing the reversibility of LSBs.The designed LSB demonstrates a high specific capacity of1529.6 mA h g-1in the first cycle at 0.2 C.The rate performance is also excellent,maintaining an ultra-high specific capacity of 779.7 mA h g-1at a high rate of 8 C.This investigation explores the mechanism of the interaction between the interlayer and LiPSs,and provides a new strategy to regulate the reaction kinetics and Li2S deposition in LSBs.

关键词： Adsorption Catalysis Electrostatic spinning Interlayers Li2S electrodeposition Lithium-sulfur batteries Polysulfide intermediates

Up-conversion fluorescence biosensor for sensitive detection of CA-125 tumor markers

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Journal of Rare Earths 2019年第9期37卷 943-948,I0002页

作者： Jingshi Liu Sai Xu liheng sun Songtao Hu Jiao sun Min Liu Cui Ma Haipeng Liu Ziqing Wang Ying Yang Biao Dong Decheng Hong College of Physics Jilin UniversityChangchun 130021China State Key Laboratory on Integrated Optoelectronics College o f Electronic Science and EngineeringJilin UniversityChangchun 130012China Department of Physics Dalian Maritime UniversityDalian 116026China Department of Cell Biology College of Basic Medical SciencesJilin UniversityChangchun 130021China Department of Radiation Oncology. The First Hospital Jilin UniversityChangchun 130021China

Sensitive and specific bioassays of tumor markers are critical for early cancer detection and treatment.In recent years,lanthanide(Ln3+)doped upconversion nanoparticles(UCNPs)have attracted wide attentions in tumor markers detectio n.Herein,we co mbined NaYF4:Yb,Tm and silver nanoparticles,serving as energy donor and receptor,respectively,to form an up-conversion fluorescence based inhibitory tumor marker biosensor system.The tumor marker CA-125 molecules are labeled with silver NPs,and the energy transfer fluorescent signal can be detected between the UCNPs and the silver NP receptors.The biosensor shows good stability,high sensitivity and selectivity in the tumor marker concentration range from 5 to 100 ng/mL,as well as a detection limit of 120 pg/mL.Due to the advantage of ease of fabrication and operation,low cost and high information capacity,this technology holds great potential for the clinical applications.

关键词： NaYF4:Yb,Tm CA-125 molecules Silver NPs Energy transfer Good stability High sensitivity and selectivity

三乙醇胺对掺偏高岭土水泥水化及硫酸盐平衡的影响

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建筑材料学报 2024年第6期27卷 528-535页

作者：刘志伟卢子臣张立恒潘晔孙振平同济大学先进土木工程材料教育部重点实验室上海201804 同济大学材料科学与工程学院上海201804

在2种类型石膏(无水石膏和半水石膏)情况下,研究了三乙醇胺(TEA)对掺偏高岭土水泥(MKC)水化进程及其硫酸盐平衡的影响,并与自配硅酸盐水泥(APC)进行对比.结果表明:无TEA加入时,MKC中偏高岭土(MK)的存在可延长水泥的水化诱导期并加快硫... 详细信息

在2种类型石膏(无水石膏和半水石膏)情况下,研究了三乙醇胺(TEA)对掺偏高岭土水泥(MKC)水化进程及其硫酸盐平衡的影响,并与自配硅酸盐水泥(APC)进行对比.结果表明:无TEA加入时,MKC中偏高岭土(MK)的存在可延长水泥的水化诱导期并加快硫酸盐的消耗,2种类型石膏表现基本一致;TEA的加入能够显著促进水泥中铝相矿物的水化,增加硫酸盐平衡所需石膏掺量,同时石膏类型对水泥水化进程与硫酸盐平衡影响显著;对于APC与MKC,在TEA作用下能有效维持其硫酸盐平衡的石膏类型分别为无水石膏与半水石膏,这与水泥中硫酸根离子溶出-吸附-沉淀的动态平衡密切相关.

关键词：偏高岭土石膏类型水泥水化硫酸盐平衡三乙醇胺

导流管参数对真空紧耦合气雾化法制备Fe-Cr合金粉末的影响

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粉末冶金技术 2024年第1期42卷 68-74页

作者：苏才津孙耀宁董开基尹燕张瑞华姜立恒新疆大学机械工程学院乌鲁木齐830047 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050 阳江市五金刀剪产业技术研究院阳江529533 中国钢研科技集团有限公司北京100082

采用真空紧耦合气雾化法制备Fe–Cr合金粉末,研究了导流管直径与导流管伸出长度对Fe–Cr合金粉末粒度分布、收得率、中位粒径(D_(50))的影响。结果表明,在其他工艺参数不变的情况下,当导流管直径从4.5 mm增大到6.0 mm时,Fe–Cr合金粉末... 详细信息

采用真空紧耦合气雾化法制备Fe–Cr合金粉末,研究了导流管直径与导流管伸出长度对Fe–Cr合金粉末粒度分布、收得率、中位粒径(D_(50))的影响。结果表明,在其他工艺参数不变的情况下,当导流管直径从4.5 mm增大到6.0 mm时,Fe–Cr合金粉末累积粒度分布曲线右移,中位粒径增大,细粉收得率减小,粉末流动性减小,松装密度减小;当导流管伸出长度由2.0 mm增加到2.5 mm时,Fe–Cr合金粉末累积粒度分布曲线左移,中位粒径减小,细粉收得率增加,粉末流动性增加,松装密度升高。综上所述,雾化压力3.8 MPa,过热度250℃,导流管直径4.5 mm,导流管伸出长度2.5 mm,制备得到的Fe–Cr合金粉末综合性能最优。

关键词：真空紧耦合气雾化法 Fe–Cr金属粉末导流管粉末性能

Defect Engineering of Disordered Carbon Anodes with Ultra-High Heteroatom Doping Through a Supermolecule-Mediated Strategy for Potassium-Ion Hybrid Capacitors

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Nano-Micro Letters 2023年第3期15卷 248-265页

作者： Lei Zhao Shirong sun Jinxin Lin Lei Zhong liheng Chen Jing Guo Jian Yin Husam N.Alshareef Xueqing Qiu Wenli Zhang Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light IndustryGuangdong University of Technology(GDUT)100 Waihuan Xi RoadPanyu DistrictGuangzhou 510006People’s Republic of China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200People’s Republic of China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004People’s Republic of China Materials Science and Engineering Physical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955‑6900Saudi Arabia School of Advanced Manufacturing Research Institute of Green Chemical Engineering and Advanced MaterialsGuangdong University of Technology(GDUT)JieyangJieyang 515200People’s Republic of China

Amorphous carbons are promising anodes for high-rate potassium-ion batteries.Most low-temperature annealed amorphous carbons display unsatisfactory capacities.Heteroatom-induced defect engineering of amorphous carbons could enhance their reversible capacities.Nevertheless,most lignocellulose biomasses lack heteroatoms,making it a challenge to design highly heteroatom-doped carbons(>10 at%).Herein,we report a new preparation strategy for amorphous carbon anodes.Nitrogen/sulfur co-doped lignin-derived porous carbons(NSLPC)with ultra-high nitrogen doping levels(21.6 at%of N and 0.8 at%of S)from renewable lignin biomacromolecule precursors were prepared through a supramolecule-mediated pyrolysis strategy.This supermolecule/lignin composite decomposes forming a covalently bonded graphitic carbon/amorphous carbon intermediate product,which induces the formation of high heteroatom doping in the obtained NSLPC.This unique pyrolysis chemistry and high heteroatom doping of NSLPC enable abundant defective active sites for the adsorption of K+and improved kinetics.The NSLPC anode delivered a high reversible capacity of 419 mAh g^(-1)and superior cycling stability(capacity retention of 96.6%at 1 A g^(-1)for 1000 cycles).Potassiumion hybrid capacitors assembled by NSLPC anode exhibited excellent cycling stability(91%capacity retention for 2000 cycles)and a high energy density of 71 Wh kg^(-1)at a power density of 92 W kg^(-1).

关键词： Defect Heteroatom Active sites Supramolecule Potassium-ion hybrid capacitors

柯萨奇病毒A10型对利巴韦林耐药性的初步研究

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病毒学报 2024年第2期40卷 337-345页

作者：孙甜甜宗彦君王蕊李冀琛刘莹李晓亮韩振志于力恒刘志军孙强张勇潍坊医学院潍坊261053 传染病溯源预警和智能决策全国重点实验室中国疾病预防控制中心病毒病预防控制所北京102206 国家脊髓灰质炎实验室国家卫生健康委员会实验室生物安全重点实验室国家卫生健康委员会医学病毒与病毒病重点实验室中国疾病预防控制中心病毒病预防控制所北京102206 山东第一医科大学济南250117 首都儿科研究所病毒学研究室儿童病毒病病原学北京市重点实验室北京100020

近年来,全国范围内手足口病(Hand, foot, and mouth disease,HFMD)的感染率逐渐上升,其中柯萨奇病毒A组10型(Coxsackievirus A10,CV-A10)是主要病原体之一,利巴韦林是临床上治疗儿童手足口病的常用药物之一。为了评价利巴韦林在体外对CV... 详细信息

近年来,全国范围内手足口病(Hand, foot, and mouth disease,HFMD)的感染率逐渐上升,其中柯萨奇病毒A组10型(Coxsackievirus A10,CV-A10)是主要病原体之一,利巴韦林是临床上治疗儿童手足口病的常用药物之一。为了评价利巴韦林在体外对CVA10的抑制效果,本研究中,我们随机选取了19条2009-2021年的不同地区和不同年代的有代表性的中国内地优势流行基因型C基因型的CVA10毒株,通过细胞毒性实验(Cell counting kit-8,CCK8)来检测利巴韦林在RD细胞上对CVA10的抑制率。将抑制率大于85%的CVA10定义为对利巴韦林敏感组,抑制率小于15%的CVA10定义为对利巴韦林耐药组。结果显示利巴韦林在0.78mmol/L浓度下可以对CVA10产生较好的抑制作用并且对细胞的毒性较低。19株CVA10中有4株表现出对利巴韦林耐药性,2株表现出对利巴韦林敏感性,剩余13株的敏感性在85%~15%之间。通过7日龄ICR乳鼠感染实验比较对利巴韦林敏感组和耐药组毒株的致病力差异,通过观察乳鼠临床评分、生存率、体重及组织取材的滴度测定结果均表明对利巴韦林敏感组CVA10在小鼠上的致病力比耐药组强。进一步使用MEGA 7.0软件对影响CVA10复制和翻译的2C区氨基酸序列进行差异性分析,以分析可能的耐药位点。结果显示对利巴韦林耐药组和敏感组CVA10的2C区的327位和328位氨基酸位点存在差异。本研究发现当前国内流行的CVA10存在广泛对利巴韦林耐药现象,其中部分CVA10对利巴韦林完全耐药。因此,有必要加强对CVA10耐药株的监测,以便更好地指导临床医生正确地选择抗病毒药物,为个体化的治疗提供理论依据。

关键词：柯萨奇病毒A10型利巴韦林耐药性 2C区差异位点

Tailoring Bi_(2)Te_(3) edge with semiconductor and metal properties under electron beam irradiation

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Nano Research 2022年第5期15卷 4710-4716页

作者： Ning Cao Peng Liu Jialiang Pan liheng Liang Kunpeng Cai Qingguo Shao Hongwei Zhu Xiaobei Zang School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

In pursuit of miniaturization in the semiconductor industry,two-dimensional(2D)materials are used to fabricate new electronic devices.The topological insulator(TI)material bismuth telluride(Bi_(2)Te_(3)),as an emerging 2D material,has potential applications in electronic and spintronic devices due to its unique electrical properties.It is well known that the surface-to-volume ratio increases as the thickness of the material decreases,resulting in a more prominent edge effect.Therefore,for a single-layer Bi_(2)Te_(3),the atomic structure of the edge plays a crucial role in its electrical properties.Here,combining first-principles calculations and in situ transmission electron microscopy(TEM)experimental studies,we report that there are two types of edge structures in single-layer Bi2Te3:semiconducting flat edges and metallic zigzag edges.The dynamic evolution process of the edge structure with atomic resolution shows that the proportions of these two edges change with continuous electron beam irradiation.Our findings demonstrate the viability to use electron beam as an effective tool to precisely tailor the edge of Bi_(2)Te_(3) with desired properties,which paves the way for implementation of single-layer Bi2Te3 in electronics and spintronics.

关键词： Bi_(2)Te_(3)edge electron beam irradiation in situ transmission electron microscopy(TEM) atomic precision

A panel of monoclonal antibodies against the prion protein proves that there is no prion protein in human pancreatic ductal epithelial cells

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Virologica Sinica 2014年第4期29卷 228-236页

作者： liheng Yang Yan Zhang Lipeng Hu Ying Zhu Man-sun Sy Chaoyang Li State Key Laboratory of Virology and Department of Molecular Virology Wuhan Institute of Virology Chinese Academy of Sciences Department of Virology School of Life Sciences Wuhan University Department of Molecular Endocrinology Institute of Hydrobiology Chinese Academy of Sciences Department of Pathology Case Western Reserve University

Prion diseases are a group of neurodegenerative diseases that are fatal. The study of these unique diseases in China is hampered by a lack of resources. Amongst the most important resources for biological study are monoclonal antibodies. Here, we characterize a panel of monoclonal antibodies specific for cellular prion protein by enzyme-linked immunosorbent assay(ELISA), immunofluorescent staining, flow cytometry, and western blotting. We identify several antibodies that can be used for specific applications and we demonstrate that there is no prion protein expression in human pancreatic ductal epithelial cells(HPDC).

关键词：单克隆抗体朊病毒蛋白上皮细胞面板导管胰腺证明神经退行性疾病

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弥散加权成像在宫颈癌诊断中的效能

中国民康医学 2023年第24期35卷 144-146页

作者：孙立衡潢川县人民医院放射科河南信阳465150

目的:分析弥散加权成像(DWI)在宫颈癌诊断中的效能。方法:选取2020年7月至2022年5月该院收治的96例疑似宫颈癌患者为研究对象,均于术前进行磁共振成像(MRI)平扫和DWI检查,以术后病理结果为金标准,比较MRI平扫、DWI检查对宫颈癌的检出结... 详细信息

目的:分析弥散加权成像(DWI)在宫颈癌诊断中的效能。方法:选取2020年7月至2022年5月该院收治的96例疑似宫颈癌患者为研究对象,均于术前进行磁共振成像(MRI)平扫和DWI检查,以术后病理结果为金标准,比较MRI平扫、DWI检查对宫颈癌的检出结果及在宫颈癌诊断中的效能。结果:病理学检查结果显示,96例疑似宫颈癌患者中阳性65例,阴性31例(其中宫颈糜烂12例,子宫肌瘤19例);MRI平扫检出阳性51例,阴性45例;DWI检查检出阳性64例,阴性32例;DWI检查诊断宫颈癌的灵敏度、准确度、阴性预测值均高于MRI平扫,漏诊率低于MRI平扫,差异有统计学意义(P<0.05)。结论:DWI检查诊断宫颈癌的效能高于MRI平扫。

关键词：宫颈癌磁共振成像平扫弥散加权成像诊断效能

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县域耕地土壤养分时空变异特征研究

干旱地区农业研究 2023年第3期41卷 238-247页

作者：夏利恒申江龙孙语彤刘京陕西地建土地工程技术研究院有限责任公司陕西西安710075 西北农林科技大学资源环境学院陕西杨凌712100 陕西省土地工程建设集团有限责任公司陕西西安710075

土壤养分空间变异研究是精准农业实施的前提,对提高粮食作物单位面积产量和保护农业生态环境具有重要作用。为掌握陕西渭北旱塬区土壤养分时空变异规律,综合空间自相关和重心模型,分析1980—2007年、2007—2017年白水县耕地土壤有机质(S... 详细信息

土壤养分空间变异研究是精准农业实施的前提,对提高粮食作物单位面积产量和保护农业生态环境具有重要作用。为掌握陕西渭北旱塬区土壤养分时空变异规律,综合空间自相关和重心模型,分析1980—2007年、2007—2017年白水县耕地土壤有机质(SOM)、速效磷(AP)和速效钾(AK)的时空变异特征。结果表明:(1)研究区土壤SOM的平均含量分别增加了1.29、3.22 g·kg^(-1),AP的平均含量分别增加了6.89、24.45 mg·kg^(-1),仅有AK的平均含量呈现出先减少后增加的趋势。(2)三期耕地土壤养分的变异系数范围为30.2%~90.8%,属于中等变异。1980—2017年,耕地土壤SOM、AP和AK的全局Moran’s I指数均降低,空间结构性减弱,随机因素作用增强。(3)土壤SOM、AP和AK含量均有不同程度的增加,土壤SOM含量总体呈北低南高分布,土壤AP、AK含量分布情况较为一致,呈东高西低。(4)土壤SOM含量重心在东南方向发生偏移,AP、AK含量重心在东北方向发生偏移。土壤养分标准差椭圆空间分布格局同研究区分布方向一致,转角呈现“增加-减少”的变化规律,椭圆面积减少,养分空间分布趋于集中。该研究探明了白水县土壤养分的空间分布情况与养分重心迁移方向,为合理规划和利用土地资源与土壤养分管理提供依据。

关键词：耕地土壤养分重心模型时空变异