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超高通量测序模板的质控评估方法研究 认领
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作者 郑希 毛伟华 +3 位作者 高其康 戎念杭 任燕东 李金辉 《实验科学与技术》 2020年第2期13-16,共4页
Ion Torrent作为革新性的芯片测序技术,具有简捷、快速、高效等优势,在生命科学研究领域展现出强大的能力。主要操作步骤包括:准备文库、制备模板、芯片测序和数据分析。其中,制备出含DNA链的离子微球颗粒的测序模板是试验的关键步骤之... Ion Torrent作为革新性的芯片测序技术,具有简捷、快速、高效等优势,在生命科学研究领域展现出强大的能力。主要操作步骤包括:准备文库、制备模板、芯片测序和数据分析。其中,制备出含DNA链的离子微球颗粒的测序模板是试验的关键步骤之一。对离子微球颗粒进行流式细胞检测,可以在下一步测序试验进行之前,对离子微球颗粒制备情况作质控评估,减少因测序模板制备不成功或含DNA链的离子微球颗粒比例少所损耗的时间和试剂成本,提高测序效率。 展开更多
关键词 ION Torrent 测序 离子微球颗粒 流式细胞
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Cage-like P4S3 molecule as promising anode with high capacity and cycling stability for Li+/Na+/K+ storage 认领
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作者 Denghu Wei Jie Yin +5 位作者 Zhicheng Ju Suyuan Zeng Haibo Li Wei Zhao Yanyan Wei Huaiyong Li 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第11期187-194,共8页
Phosphorus sulfide cage molecule based on P4S3 was investigated for the first time as anode material for the storage of alkali metal ions(Li+, Na+, K+). Such P4S3 sample was obtained in a large scale by a simple heati... Phosphorus sulfide cage molecule based on P4S3 was investigated for the first time as anode material for the storage of alkali metal ions(Li+, Na+, K+). Such P4S3 sample was obtained in a large scale by a simple heating reaction of low-cost rep P and S. X-ray diffraction refinement analysis indicates that P4S3 sample possesses a defect rich molecule crystal structure with S/P atom ratio of 0.74. The P4S3 anode delivered a high reversible capacity of 1266 m Ah g-1 for lithium-ion batteries at 0.1 A g-1 and good cycling performance. Experimental results demonstrated that the P4S3 anode undergoes a reversible Listorage reaction of P4S3+ 11 Li++ 11 e-←→ 0.5 Li4P2S6+ 3 Li3P during cycling. It also exhibited a high capacity of 1002 and 378 mAh g-1 at 0.1 A g-1 for Na+and K+storage, respectively. These properties suggest the promising application of P4S3 anode in high energy batteries. 展开更多
关键词 Phosphorus sulfide ANODE Lithium ion battery Sodium ion battery Potassium ion batteries
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文章速递Copolymer-assisted Polypropylene Separator for Fast and Uniform Lithium Ion Transport in Lithium-ion Batteries 认领
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作者 Yan Yan Qing-Ran Kong +5 位作者 Chuang-Chao Sun Jia-Jia Yuan Zheng Huang Li-Feng Fang Bao-Ku Zhua You-Zhi Song 《高分子科学:英文版》 SCIE CAS CSCD 2020年第12期1313-1324,共12页
In lithium-ion batteries(LIBs),separators play a vital role in lithium-ion(Li+)transport,and thus affect rate performance,battery life,and safety.Here,a new kind of multifunctional copolymer poly(acrylonitrile-co-lith... In lithium-ion batteries(LIBs),separators play a vital role in lithium-ion(Li+)transport,and thus affect rate performance,battery life,and safety.Here,a new kind of multifunctional copolymer poly(acrylonitrile-co-lithium acrylate-co-butyl acrylate)(PAAB-Li)is synthesized through soap-free emulsion polymerization,and is used to form homogeneous-covered separator based on PP matrix by a simple dip-annealing process.Compared to the bare PP separator,the modified separators with PAAB-Li enable higher ionic conductivity,higher lithium ion transference number(increased from 0.360 to 0.525),and lower interface impedance(reduced from 155Ω to 34Ω).It has been indicated that PAAB-Li functional layer significantly promotes the fast transport of Li+and improves the compatibility of the separator/electrolyte-electrode interface.The LiCo02/graphite cells with the PAAB-Li-assisted separator demonstrate excellent cycle stability and rate performance.In addition,the Li symmetric cells with the modified separator stably cycle over 800 h,indicating the functional layer effectively suppresses the lithium dendrite growth.This facile strategy can be easily applied to LIBs requiring high safety and even be scalable to Li metal batteries.Moreover,the possible mechanism of the PAAB-Li functional layer promoting fast and uniform Li+transport is discussed in this paper. 展开更多
关键词 Polyelectrolytes Polypropylene separator Lithium ion transport Dendrite-free Lithium-ion battery
文章速递Research Progress on the Separation of Alkaloids from Chinese Medicines by Column Chromatography 认领
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作者 Xingchu Gong 《化学工程与科学期刊(英文)》 2020年第4期358-377,共20页
Alkaloids have a variety of bioactivities and great development value in the fields of pharmaceuticals, cosmetics and health food. Column chromatography is a common method for preparing alkaloids. In this paper, the r... Alkaloids have a variety of bioactivities and great development value in the fields of pharmaceuticals, cosmetics and health food. Column chromatography is a common method for preparing alkaloids. In this paper, the research status of the separation and purification of alkaloids from Chinese medicines by column chromatography is reviewed, and the factors that influence the refining of alkaloids via a macroporous adsorption resin, ion exchange resin and silica gel are summarized. The thermodynamic and kinetic modeling methods for the static adsorption of adsorbents are also reviewed in this paper. It is suggested that the modeling method of the column chromatography process be deeply studied to establish a more stringent quality control method for sampling liquid and to strengthen the online detection of the chromatography process to improve the refining effect of alkaloids. 展开更多
关键词 Alkaloid Column Chromatography Ion Exchange Resin Macroporous Adsorbent Resin Model Silica Gel
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文章速递Role of Al(III) in Zn-Based Electrode Synthesis for Supercapacitor 认领
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作者 Hongfeng Xu 《材料科学与应用期刊(英文)》 2020年第10期659-667,共9页
Supercapacitor is considered as one of the most promising energy storage systems because of its high power density, long life and low production cost. Electrode materials play important roles in the performance of Sup... Supercapacitor is considered as one of the most promising energy storage systems because of its high power density, long life and low production cost. Electrode materials play important roles in the performance of Supercapacitor (SC). In this study, Zn-based hydrotalcite structure materials are prepared by hydrothermal method. The influence of Zn/Al ratio in precursors on electrochemical properties of electrode materials is investigated. The results show that Al(III) promotes the formation of relatively ordered active substances and participates in redox reaction on electrode surface. Specific capacitance of Zn-based electrode reaches 2557 F<span style="white-space:nowrap;">·</span>g<sup>-1</sup> (1.0 A<span style="white-space:nowrap;">·</span>g<sup>-1</sup>) at Zn/Al molar ratio of 1:1 in precursors. This method is simple and environmentally friendly. The electrode exhibits excellent electrochemical activity and stability, showing this material application prospect for supercapacitor. 展开更多
关键词 Supercapacitor Hydrotalcite Zn-Based Electrode Aluminium Ion Doping
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The Study of Microchannel Plate Gain Using SIMION 认领
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作者 Yifan Zhao 《建模与仿真(英文)》 2020年第1期1-17,共17页
Microchannel plates (MCP) are widely used for particle detection. The gain of chevron MCPs is related to geometrical parameters, but no study has been done through SIMION simulation. The purpose of this study is to mo... Microchannel plates (MCP) are widely used for particle detection. The gain of chevron MCPs is related to geometrical parameters, but no study has been done through SIMION simulation. The purpose of this study is to model a chevron MCP and its secondary emission process using SIMION and determine the relationship between microchannel plate gain, voltage, channel bias angle, and diameter. Two geometry files simulated MCP electric field and shape, and a Lua program simulated secondary emission. Simulation results showed that MCP gain is proportional to voltage, angles between 5 and 15 degrees maximize gain, and gain is inversely proportional to the diameter. This study accurately simulates a chevron MCP and yields the relationship between gain, voltage, channel bias angle, and diameter. Further studies are needed to simulate electron trajectories for improved precision. 展开更多
关键词 MICROCHANNEL PLATE SIMION SECONDARY EMISSION Ion Simulation
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Cryo-ET Workflow for Understanding Ion Channels Localization on the Nodes of Ranvier 认领
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作者 Jiaxuan Wang 《生物科学与医学(英文)》 2020年第2期55-72,共18页
The localization of ion channels on myelinated axon is closely related with the saltatory conduction of action potential (AP). Abnormal changes in these channels contribute to multiple mental diseases. The development... The localization of ion channels on myelinated axon is closely related with the saltatory conduction of action potential (AP). Abnormal changes in these channels contribute to multiple mental diseases. The development of cryo-Electron Tomography (cryo-ET) has provided a promising prospect for peering into ion channels in their native environment at high resolution. Previous achievements are reviewed here on cryo-ET. Accordingly, a cryo-ET workflow is designed for understanding ion channels localization in myelinated axon, especially nodes of Ranvier, which are significant for the saltatory conduction involved in the propagation of high-speed AP. The workflow is divided into six parts: the preparation of neural cultures with myelin, antibodies and immunofluorescence staining, frozen-hydrated sample preparation, cryo-ET imaging, cryo-correlative light and electron microscopy (cryo-CLEM) imaging, three-dimensional (3D) reconstruction and refinement. The purpose is to conceive a possible solution for the problems related to ion channel compounds including localization, conformation dynamics, accessory structures of ion channel and transient regulatory factors, and thus provide insights into treating neurological diseases caused by abnormal ion channels activity. 展开更多
关键词 Cryo-ET Ion CHANNELS LOCALIZATION The NODES of Ranvier
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Investigation of Quantum Entanglement through a Trapped Three Level Ion Accompanied with Beyond Lamb-Dicke Regime 认领
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作者 Rasim Dermez 《量子信息科学期刊(英文)》 2020年第2期23-35,共13页
In this study, our goal is to obtain the entanglement dynamics of trapped three-level ion interaction two laser beams in beyond Lamb-Dicke parameters. Three values of LDP, <span style="white-space:nowrap;"... In this study, our goal is to obtain the entanglement dynamics of trapped three-level ion interaction two laser beams in beyond Lamb-Dicke parameters. Three values of LDP, <span style="white-space:nowrap;"><em>η</em>=0.09, <span style="white-space:nowrap;"><em>η</em>=0.2 </span></span>and <span style="white-space:nowrap;"><em>η</em>=0.3 </span>are given. We used the concurrence and the negativity to measure the amount of quantum entanglement created in the system. The interacting trapped ion led to the formation of phonons as a result of the coupling. In two quantum systems (ion-phonons), analytical formulas describing both these measurements are constructed. These formulas and probability coefficients include first order terms of final state vector. We report that long survival time of entanglement can be provided with two quantum measures. Negativity and concurrence maximum values are obtained N = 0.553 and for LDP = 0.3. As a similar, the other two values of LDP are determined and taken into account throughout this paper. For a more detailed understanding of entanglement measurement results, “contour plot” was preferred in Mathematica 8. 展开更多
关键词 Entangled State Trapped Three-Level Ion Lamb-Dick Parameter Rabi Frequency Quantum Measures
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The Coherent State of the Landau Hamiltonian and the Relativistic Corrections to the Zeeman Effect in He<sup>+</sup>Ions 认领
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作者 Kunnat Sebastian Wangyao Li 《现代物理(英文)》 2020年第3期455-474,共20页
We calculate the energy levels of He+ ion placed in a uniform magnetic field directed perpendicular to the direction of its center of mass (CM) velocity vector, correct to relative order . Our calculations are within ... We calculate the energy levels of He+ ion placed in a uniform magnetic field directed perpendicular to the direction of its center of mass (CM) velocity vector, correct to relative order . Our calculations are within the frame work of an approximately relativistic theory, correct to relative order , of a two-particle composite system bound by electromagnetic forces, and written in terms of the position, momentum and spin operators of the constituent particles as proposed by Krajcik and Foldy, and also by Close and Osborn. Since the He+ ion has a net electric charge, the total or the CM momentum is not conserved and a neat separation of the CM and the internal motion is not possible. What is new in our approach is that, for the basis states in a first order degenerate perturbation theory to calculate the effects of the external magnetic field, we use the direct product of the coherent state of the Landau Hamiltonian of the He+ ion in a uniform magnetic field and of the simultaneous eigenstate of the internal Hamiltonian h, j2, l2, s2 and jz,?where j, l and s are the internal total, orbital and spin angular moments of the He+ ion. The coherent state is an excellent approximation to the expected classical circular motion of the center of mass (CM) of the He+ ion. In addition to the Z2 a2 corrections to the usual nonrelativistic results, including the small corrections due to the nuclear motion, we also obtain corrections which depend on the kinetic energy (ECM ) of the CM circular motion of the He+ ion, in a nontrivial way. Even though these corrections are proportional to , where M is the mass of the He+ ion, and are small for nonrelativistic CM motion, the results should be verifiable in careful experiments. Our results may also have application in astrophysical observations of the spectral lines of He+ ions in magnetized astrophysical objects. 展开更多
关键词 RELATIVISTIC CORRECTIONS Zeman Effect Helium Ion in a Magnetic Field Coherent State LANDAU HAMILTONIAN Energy Levels
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Emerging rechargeable aqueous aluminum ion battery:Status,challenges,and outlooks 认领
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作者 Du Yuan Jin Zhao +2 位作者 William Manalastas Jr Sonal Kumar Madhavi Srinivasan 《纳米材料科学:英文版》 CAS 2020年第3期248-263,共16页
Aluminum ion battery(AIB)technology is an exciting alternative for post-lithium energy storage.AIBs based on ionic liquids have enabled advances in both cathode material development and fundamental understanding on me... Aluminum ion battery(AIB)technology is an exciting alternative for post-lithium energy storage.AIBs based on ionic liquids have enabled advances in both cathode material development and fundamental understanding on mechanisms.Recently,unlocking chemistry in rechargeable aqueous aluminum ion battery(AAIB)provides impressive prospects in terms of kinetics,cost,safety considerations,and ease of operation.To review the progress on AAIB,we discuss the critical issues on aluminum electrochemistry in aqueous system,cathode material design to overcome the drawbacks by multivalent aluminum ions,and challenges on electrolyte design,aluminum stripping/plating,solid-electrolyte interface(SEI)formation,and design of cathode materials.This review aims to stimulate exploration of high-performance AAIB and rationalize feasibility grounded on underlying reaction mechanisms. 展开更多
关键词 Aluminum ion battery Aqueous aluminum ion battery RECHARGEABLE Al stripping/plating SEI
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Research on the Transformation of Teachers'Functions in New Applied Colleges 认领
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作者 Lei Sun 《当代教育研究(百图)》 2020年第6期10-13,共4页
With the continuous development of society,the demand for applied talents is becoming more and more urgent,and the new applied undergraduate colleges based on the cultivation of applied talents can effectively solve t... With the continuous development of society,the demand for applied talents is becoming more and more urgent,and the new applied undergraduate colleges based on the cultivation of applied talents can effectively solve this contradiction between supply and demand.If we want to realize the cultivation of applied talents,we need to establish a team of teachers with excellent quality.Therefore,this paper gives four ways to solve this problem:strengthening the construction of teachers’ethics,improving teachers’ideological and political ability,strengthening teachers’curriculum practice level,and improving teachers’ability of selfcareer planning. 展开更多
关键词 Appl icat ion Teacher funct ion TRANSFORMATION
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北京市朝阳区1例输入性SARS-CoV-2全基因组序列分析 认领
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作者 韩桃利 王海滨 +7 位作者 焦洋 雷娜 高艳 赵剑虹 田甜 董歧 段杉 孙灵利 《病毒学报》 CAS CSCD 北大核心 2020年第5期745-750,共6页
北京市朝阳区在连续40d没有新增本土COVID-19确诊病例的情况下,出现了1例潜伏期超过14d的境外回国COVID-19确诊病例。为分析北京市朝阳区1例COVID-19患者是否为输入病例,进行了全基因组序列测定和遗传特性分析,本研究采用高通量测序技... 北京市朝阳区在连续40d没有新增本土COVID-19确诊病例的情况下,出现了1例潜伏期超过14d的境外回国COVID-19确诊病例。为分析北京市朝阳区1例COVID-19患者是否为输入病例,进行了全基因组序列测定和遗传特性分析,本研究采用高通量测序技术配合Ion Torrent系列仪器和试剂对患者咽拭子中的SARS-CoV-2进行测序,同时应用对应插件或软件分析其全基因组同源性和变异情况。结果显示,该病例标本中测得1株SARS-CoV-2毒株,共29 876 bp,BLAST结果显示与其他国家和地区分离株的相似性高于与中国分离株的相似性。系统进化树中该毒株与2003年感染人的SARS冠状病毒和蝙蝠中分离的SARS冠状病毒明显不同,分处不同进化分支;该毒株与中国分离株分处不同的簇,而和美国分离株聚集在一簇。另外,突变分析显示存在3个改变氨基酸性质的非同义突变。本研究提示,该病例为美国输入的SARS-CoV-2感染病例,应注意境外输入性COVID-19的传播,并适当延长隔离观察期限;该毒株在患者的1例关联病例中发生了部分核苷酸突变,对SARS-CoV-2的致病力等的影响有待进一步研究。 展开更多
关键词 SARS-CoV-2 COVID-19 高通量测序 Ion Torrent 输入病例
A Theoretical Approach to Study J/Ψ Suppression in Relativistic Heavy Ion Collisions with Ellipsoidal Evolution 认领
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作者 Santosh K. Karn 《微观物理学期刊(英文)》 2020年第1期1-7,共7页
With a view to understanding J/Ψ suppression in relativistic heavy ion collisions, we compute the suppression rate within the framework of hy-drodynamical evolution model. For this, we consider an ellipsoidal flow an... With a view to understanding J/Ψ suppression in relativistic heavy ion collisions, we compute the suppression rate within the framework of hy-drodynamical evolution model. For this, we consider an ellipsoidal flow and use an ansatz for temperature profile function which accounts for time and the three dimensional space evolution of the quark-gluon plas-ma. We have calculated the survival probability separately as the func-tion of transverse and longitudinal momentum. We have shown that previous calculations are special cases of this model. 展开更多
关键词 RELATIVISTIC Heavy Ion COLLISIONS QUARK-GLUON Plasma Momentum Dependence SUPPRESSION Rate Ellipsoidal EVOLUTION
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Progress of quantum molecular dynamics model and its applications in heavy ion collisions 认领
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作者 Ying-Xun Zhang Ning Wang +6 位作者 Qing-Feng Li Li Ou Jun-Long Tian Min Liu Kai Zhao Xi-Zhen Wu Zhu-Xia Li 《物理学前沿:英文版》 SCIE CSCD 2020年第5期1-64,共64页
In this review article,we first briefty introduce the transport theory and quantum molecular dynamics model applied in the study of the heavy ion collisions from low to intermediate energies.The developments of improv... In this review article,we first briefty introduce the transport theory and quantum molecular dynamics model applied in the study of the heavy ion collisions from low to intermediate energies.The developments of improved quantum molecular dynamics model(ImQMD)and ultra-relativistic quantum molecular dynamics model(UrQMD),are reviewed.The reaction mechanism and phenomena related to the fusion,multinucleon transrer,fragmentation,collective flow and particle production are reviewed and discussed within the framework of the two models.The constraints on the isospin asymmetric muclear equation of state and in-medium nucleon nucleon cross sections by comparing the heavy ion collision data with transport models calculations in last decades are also discussed,and the uncertainties of these constraints are analyzed as well.Finally,we discuss the future direction of the development of the transport models for improving the understanding of the reaction mechanism,the descriptions of various observables,the constraint on the nuclear equation of state,as well as for the constraint on in-medium nucleon-nucleon cross sections. 展开更多
关键词 quantum molecular dynamics model low energy heavy ion collisions low-intermediate energy heavy ion collisions fusion multinucleon transfer reaction MULTIFRAGMENTATION collective flow isospin asymmetric equation of state in-medium nucleon-nucleon cross sections
基于神经表面水分子有序排列假定的太赫兹-远红外神经信号产生和传输的初步模型Ⅰ:信号特征 认领
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作者 向左鲜 唐传祥 +1 位作者 常超 刘国治 《科学通报:英文版》 SCIE EI CSCD 2020年第4期308-317,共10页
本文基于水分子在神经元表面有序排列等假设,利用量子光学和电动力学等理论研究神经系统中的电磁场问题.作者首先推导了水分子-电磁场-离子的拉格朗日函数,利用拉格朗日方程得到系统随时间演化的动力学方程,并在两能级近似下,利用解析方... 本文基于水分子在神经元表面有序排列等假设,利用量子光学和电动力学等理论研究神经系统中的电磁场问题.作者首先推导了水分子-电磁场-离子的拉格朗日函数,利用拉格朗日方程得到系统随时间演化的动力学方程,并在两能级近似下,利用解析方法(主要是微扰理论)和数值方法分别求解上述动力学方程.当初始场强较弱时,微扰理论和数值计算结果符合得较好;当初始场强很强时,由于非线性效应,此时系统存在部分高阶模式.作者还讨论了神经高频电磁场信号的特性(电磁场色散关系、场的时域波形和频谱特征等)以及部分物理参数对神经高频电磁场的影响.最后,作者预测了神经元表面上电磁辐射的多种固有本征振动模式,这些振动模式的频率范围位于太赫兹和远红外波段. 展开更多
关键词 NEURON THZ INFRARED NEURON signal generation and conduction Ion OSCILLATION
Oligolayered Ti3C2Tx MXene towards high performance lithium/sodium storage 认领
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作者 Xiaolan Song Hui Wang +11 位作者 Shengming Jin Miao Lv Ying Zhang Xiaodong Kong Hongmei Xu Ting Ma Xinyuan Luo Hengfeng Tan Dong Hu Chaoyong Deng Xinghua Chang Jianlong Xu 《纳米研究:英文版》 SCIE EI CAS CSCD 2020年第6期1659-1667,共9页
Nano Research volume 13,pages1659–1667(2020)Cite this article 232 Accesses 3 Citations Metrics details Abstract 2D MXenes are highly attractive for achieving ultrafast and stable lithium/sodium storage due to their g... Nano Research volume 13,pages1659–1667(2020)Cite this article 232 Accesses 3 Citations Metrics details Abstract 2D MXenes are highly attractive for achieving ultrafast and stable lithium/sodium storage due to their good electric conductivity and abundant redox active sites.While,effective strategies for scalable preparation of oligolayered MXenes are still under exploration.Herein,oligolayered Ti3C2Tx MXene is successfully obtained after conventional synthesis of multilayered Ti3C2 and subsequent delamination process via an organic solvent of tetramethyl-ammonium hydroxide(TMAOH).Comprehensive electrochemical study reveals that surface-controlled redox reaction dominated the charge storage behavior of oligolayered Ti3C2Tx with fast reaction kinetics.Impressively,the obtained oligolayered Ti3C2Tx exhibits excellent lithium/sodium storage performance,featured for a high specific capacity of 330 mAhg^−1 at 1.0 Ag^−1 after 800 cycles for lithium storage and 280 mAhg^−1 at 0.5 Ag^−1 after 500 cycles for sodium storage.Such impressive performance will advance the development of oligolayered Ti3C2Tx based materials for lithium/sodium storage and even broaden their application into energy storage. 展开更多
关键词 oligolayered Ti3C2Tx MXene DELAMINATION lithium ion battery sodium ion battery pseudocapacitance contribution
具有介孔壳层的空心Fe3O4/碳MOFs衍生材料用于储锂 认领
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作者 伊秋颖 杜梦梦 +4 位作者 沈斌 嵇家辉 董陈成 邢明阳 张金龙 《科学通报:英文版》 SCIE EI CSCD 2020年第3期233-242,共10页
空心MOFs及其衍生物因其高比表面积和完美的框架结构而受到越来越多的关注,这些特性决定了MOFs材料在储能和催化领域具有极大的应用潜力.然而,目前很少有研究针对空心MOFs的壳层进行修饰,如对壳层表面进行介孔修饰,这将赋予MOFs衍生材... 空心MOFs及其衍生物因其高比表面积和完美的框架结构而受到越来越多的关注,这些特性决定了MOFs材料在储能和催化领域具有极大的应用潜力.然而,目前很少有研究针对空心MOFs的壳层进行修饰,如对壳层表面进行介孔修饰,这将赋予MOFs衍生材料一些新的性能.本文以50 nm尺寸的二氧化硅纳米球为模板,通过配位聚合诱导自组装工艺成功地合成了具有介孔壳层的空心MOFs(MIL-53(Fe)).紧密修饰的介孔结构使空心MOFs的壳层非常薄,从而实现了从MOFs到空心Fe3O4/碳材料的转化.将空心Fe3O4/碳材料作为阳极活性材料用于锂离子电池,该材料表现出优异的电化学性能.即使在0.1 A/g电流密度条件下循环200次,电容量仍可保持在1270 mA h/g.本研究为能源领域多功能化MOFs及其衍生物的设计和制备提供了新的思路. 展开更多
关键词 HOLLOW MOFS HOLLOW Fe3O4/carbon MESOPORE modification LITHIUM ion batteries
Structural Characterization of Thin Epitaxial GaN Films on Polymer Polyimides Substrates by Ion Beam Assisted Deposition 认领
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作者 Sri Vidawati Jürgen W. Gerlach +1 位作者 Benjamin Herold Bernd Rauschenbach 《材料物理与化学进展(英文)》 2020年第9期199-206,共8页
The Epitaxial GaN thin films have been fabricated by Ion Beam Assisted Deposition (IBAD) process using nitrogen ions with hyperthermal energies on the polyimides polymer substrates. By applying with the Reflection of ... The Epitaxial GaN thin films have been fabricated by Ion Beam Assisted Deposition (IBAD) process using nitrogen ions with hyperthermal energies on the polyimides polymer substrates. By applying with the Reflection of High-Energy Electron Diffraction (RHEED), Scanning Electron Microscopy (SEM) and Quantum Design Physical Properties Measurement System, the behaviour of hexagonal GaN thin films is investigated. The result showed that the high quality of the deposited GaN layers kept appearing for many parameters depending on the temperature greatly. The behaviour of high quality of epitaxial GaN coating on the polyimide polymer substrates is a promising material for optoelectronic devices and semiconductor devices application. 展开更多
关键词 Ion Beam Assisted Deposition Hexagonal GaN Thin Film SEM Quantum Design Physical Properties Measurement System RHEED
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Ablation of TRPV4 in HepG2 with Its CRISPR/Cas9 Enhances Its Wound Healing 认领
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作者 Eun Jeoung Lee Sung Hwa Shin +1 位作者 Sunghee Hyun Sang Sun Kang 《美国分子生物学期刊(英文)》 2020年第1期74-89,共16页
TRPV4 activity modulates cell activities including receptor trafficking and transcriptional or translational regulations. We tested its CRISPR/Cas9 scissor efficacy in HepG2 (HEK293) cell noticed that it worked well i... TRPV4 activity modulates cell activities including receptor trafficking and transcriptional or translational regulations. We tested its CRISPR/Cas9 scissor efficacy in HepG2 (HEK293) cell noticed that it worked well in both cell lines to eliminate TRPV4 genome sequences. To confirm TRPV4 functions in the cell morphology maintenance and cell growth (beyond Ca2+ channel), we compared its wound healing, cell surface area, survival property and soft agar growth ability after deletion of TRPV4 gene in the cells with its CRISPR/Cas9 system. With these experiments, we confirmed that TRPV4 is required not only to function as Ca2+ channel but also to maintain its proper cell morphology as a corner stone protein on the cell adhesion junction. 展开更多
关键词 TRPV4 Ca2+ Ion Channel E-Cadherin TUBULIN Soft AGAR Growth CRISPR/Cas9 Scissor System
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The Effect of Mix-Design and Corrosion Inhibitors on the Durability of Concrete 认领
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作者 Loukas Karavokyros Nikolaos Katsiotis +5 位作者 Emmanouil Tzanis George Batis Andreas Sapalidis Alexandros Chatzopoulos Kosmas Sideris Margarita Beazi-Katsioti 《材料科学与化学工程(英文)》 2020年第4期64-77,共14页
The deterioration of concrete over time is the result of various mechanical, physical, chemical and biological processes, with the corrosion of reinforcement being the most serious problem of durability of reinforced ... The deterioration of concrete over time is the result of various mechanical, physical, chemical and biological processes, with the corrosion of reinforcement being the most serious problem of durability of reinforced concrete structures. Over the last 50 years, a tremendous effort has been spent by the international scientific community with laboratory research and experimental field studies in order to increase the resistance of concrete over corrosion. This paper presents an experimental study of the corrosion behavior of 5 different concrete mix designs. The compositions were developed as per the latest concrete regulations and International Standards which are as follows: conventional concrete C30/37, conventional concrete with corrosion inhibitor as an additive, conventional concrete with surface spray sealant, fine aggregate concrete and self-compacting concrete. Their behavior against corrosion was determined via the following tests: water absorption test, water permeability test, mercury intrusion porosimetry, rapid chloride penetration test (RCPT), and accelerated carbonation test. The experimental results showed that the corrosion systems examined in the study provide anti-corrosion protection on steel rebars against corrosion comparing with the reference group. Also, an inversely proportional relationship of the water/cement ratio of a composition with its corrosion behavior was observed. Smaller w/c values (0.4 instead of 0.5) lead to better anti-corrosion resistance. In addition, an analogous relationship between the cement content of a composition and its corrosion behavior was observed. 展开更多
关键词 Reinforced Concrete CARBONATION Corrosion Inhibitor MERCURY INTRUSION POROSIMETRY CHLORIDE Ion
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