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Electrochemical Performance of Passive Film Formed on Ti-Al-Nb-Zr Alloy in Simulated Deep Sea Environments

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Acta Metallurgica Sinica(English Letters) 2020年第4期33卷 595-604页

作者： jing-jing Dong Lin Fan Hai-Bing Zhang Li-kun Xu Li-Li Xue College of Material Science and Chemical Engineering Harbin Engineering University145 Nantong RoadNangang DistrictHarbin 150001China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research InstituteWenhai RoadJimo DistrictQingdao 266237China

Titanium alloy Ti-Al-Nb-Zr has high specific strength and becomes a promising structural material used in the deep *** excellent corrosion resistance of the alloy is derived from the protective passive film formed on its *** now,full agreement on interpretation of the anti-corrosion performance of the film in marine environment,especially in the deep sea,has not been *** this work,the electrochemical performance of two-surface-state Ti-Al-Nb-Zr alloys which are treated by mechanical polishing and anodizing pre-passivation in the simulated shallow sea,1000 m and 3000 m deep sea environments,is *** interpreting the electrochemical kinetic parameters,it is found that the dominant cathodic process becomes hydrogen evolution in simulated deep sea environments,but the reduction rate is restrained by high hydrostatic pressure,which arrests the passivation of the *** by X-ray photoelectron spectroscopy analysis,it is found that the passive film mainly consists of titanium *** are intermediate oxides with non-stoichiometric ratio involved in the film formation due to the low dissolved oxygen concentration and low *** results of Mott-Schottky and electrochemical impedance show that the film has n-type semiconducting property with oxygen vacancies as the main point *** anti-corrosion performance in simulated deep sea environments is one order of magnitude lower than that in the simulated shallow sea ***,from 1000 to 3000 m,the corrosion resistance is reduced very *** the inner layers of the passive film and the passive film formed in simulated deep sea environments,the proportion of lowvalence titanium oxides is relatively *** doping of low-valence titanium(Ti(Ⅱ) or Ti(Ⅲ)) results in a porous structure and ion permeability of the passive film,as well as relatively low corro sion resistance.

关键词： Titanium alloy Oxide layer Marine environment Corrosion resistance Mott-Schottky

Perspectives in Electrochemical in situ Structural Reconstruction of Cathode Materials for Multivalent-ion Storage

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Energy & Environmental Materials 2023年第1期6卷 72-86页

作者： jing Huang Xuefang Xie kun Liu Shuquan Liang Guozhao Fang School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China School of Materials Science and Engineering Central South UniversityChangsha 410083China Hunan Key Laboratory of Mineral Materials and Application Central South UniversityChangsha 410083China Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South UniversityChangsha 410083China

Multivalent-ion(such as Zn^(2+),Mg^(2+),Al^(3+))batteries are considered as a prospective alternative for large-scale energy ***,the main problem of cathode materials for multivalent-ion batteries is the sluggish diffusion of multivalent *** cathode materials will self-adjust under electrochemical conditions to achieve the optimal state for multivalent-ion *** this review,the significant role of electrochemical in situ structural reconstruction of cathode materials is *** types,basic characteristics,and formation mechanisms of reconstructed phases have been systematically discussed and *** most important insight we pointed out is that the cathode materials with loose structures after in situ electrochemical activation are conducive to the reversible diffusion of multivalent ***,several crucial issues of electrochemical activation and reconstruction were further analyzed and *** challenges and future perspectives are presented in the final section.

关键词： cathode materials electrochemical activation in situ reconstruction multivalent-ion batteries

High-dose dexamethasone regulates microglial polarization via the GR/JAK1/STAT3 signaling pathway after traumatic brain injury

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Neural Regeneration Research 2025年第9期20卷 2611-2623页

作者： Mengshi Yang miao Bai Yuan Zhuang Shenghua Lu Qianqian Ge Hao Li Yu Deng Hongbin Wu Xiaojian Xu Fei Niu Xinlong Dong Bin Zhang Baiyun Liu Beijing Tiantan Hospital Capital Medical UniversityBeijingChina Department of Neurology The First Hospital of Tsinghua UniversityBeijingChina Department of Neurotrauma and Beijing Key Laboratory of Central Nervous System Injury Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Department of Critical Care Medicine Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Center for Nerve Injury and Repair Beijing Institute of Brain DisordersChina National Clinical Research Center for Neurological DiseasesBeijingChina

Although microglial polarization and neuroinflammation are crucial cellular responses after traumatic brain injury,the fundamental regulatory and functional mechanisms remain insufficiently *** potent anti-inflammato ry agents,the use of glucoco rticoids in traumatic brain injury is still controversial,and their regulatory effects on microglial polarization are not yet *** the present study,we sought to determine whether exacerbation of traumatic brain injury caused by high-dose dexamethasone is related to its regulatory effects on microglial polarization and its mechanisms of *** vitro cultured BV2 cells and primary microglia and a controlled cortical impact mouse model were used to investigate the effects of dexamethasone on microglial ***,dexamethasone,RU486(a glucocorticoid receptor antagonist),and ruxolitinib(a Janus kinase 1 antagonist)were ***-sequencing data obtained from a C57BL/6 mouse model of traumatic brain injury were used to identify potential targets of *** Morris water maze,quantitative reverse transcription-polymerase chain reaction,western blotting,immunofluorescence and confocal microscopy analysis,and TUNEL,Nissl,and Golgi staining were performed to investigate our ***-throughput sequencing results showed that arginase 1,a marker of M2 microglia,was significantly downregulated in the dexamethasone group compared with the traumatic brain injury group at3 days post-traumatic brain *** dexamethasone inhibited M1 and M2 microglia,with a more pronounced inhibitory effect on M2microglia in vitro and in *** receptor plays an indispensable role in microglial polarization after dexamethasone treatment following traumatic brain ***,glucocorticoid receptor activation increased the number of apoptotic cells and neuronal death,and also decreased the density of dendritic spines.A possible downstream receptor signaling mechanism is th

关键词： apoptosis BV2 microglia dexamethasone glucocorticoid receptor glucocorticoids innate immune system microglial polarization neuroinflammation primary microglia traumatic brain injury

Martensitic transformation,magnetocaloric effect and phase transition strain in Ni50Mn36-xGexSn14 Heusler alloys

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Rare Metals 2022年第12期41卷 4217-4222页

作者： Dong Zheng Chao jing Bo Lu Zhe Li kun Xu Department of Physics Shanghai UniversityShanghai 200444China Laboratory for Microstructures Shanghai UniversityShanghai 200444China College of Physics and Electronic Engineering Qujing Normal UniversityQujing 655011China

In present work,the effect of Ge substitution for Mn on crystal structure and martensitic transformation was carefully investigated in magnetic shape memory Ni_(50)Mn _(36-x)Ge_(x)Sn_(14)(x=0,1) *** X-ray diffraction(XRD) patterns,it can be found that each sample possesses cubic austenitic structure(L21) at room temperature and the main peak(220) shifts to higher degree with Ge doping,indicating that the cell volume of austenitic phase *** Ge content increasing,martensitic transformation(MT),temperature shifts to higher temperature region and the difference of magnetization between martensitic and austenitic phases(AM) also *** addition,the magnetocaloric effect(MCE) and phase transition strain(ΔL/L) were investigated in *** maximal magnetic entropy change(ΔSm) associated with martensitic transition is 3.9 J·kg^(-1)-K^(-1)with applied magnetic field change of 5 T and the maximal ΔL/L reaches 0.18% in this alloy.

关键词： Heusler alloy Martensitic transformation Magnetocaloric effect Phase transition strain

A New Method for In-Situ Measurement of Internal Solitary Waves Based on the Stimulated Raman Scattering in Optical Fibers

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Journal of Ocean University of China 2023年第3期22卷 658-664页

作者： WANG jing ZHANG Meng miao Xiangying YANG Zhonghao LI Zhixin HUO Dianheng miao Hongli School of Physics and Optoelectronic Information Ocean University of ChinaQingdao 266100China

In-situ measurement of internal solitary waves(ISWs)is complicated in the ocean due to their *** present,the ISWs are mainly detected by the chain structure of conductivity-temperature-depth systems(CTDs)or temperature *** high cost limits the spatial resolution,which ultimately affects the measuring accuracy of the ISW *** this paper,we developed an experimental measurement system for detecting ISWs based on the stimulated Raman scattering in distributed optical *** system has the advantages of high precision,low cost,and easy *** experimental results show that the system is consistent with CTDs in the measurement of vertical ocean temperature *** spatial resolution of the system can reach 1.0 m and the measuring accuracy of temperature is 0.2℃.We successfully detected 3 ISWs by the system in the South China Sea and two optical remote sensing images collected on May 18,2021,the same day of two detected ISWs,verify the occurrence of the measured *** used the image pairs method to calculate the phase velocity of ISW and the result is 1.71 ms^(-1).By extracting the distances between wave packets,it can be found that the semi-diurnal tide generates the detected *** impact of the tidal current velocity on the ISW in amplitude is ***,the system has a great application prospect for detecting ISWs and other dynamic phenomena in the ocean.

关键词： internal solitary wave optical fiber stimulated Raman scattering in-situ measurement

A Mild and Efficient Synthesis of Chiral N-Boc-a-aminoaldehydes

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Chinese Chemical Letters 2006年第9期17卷 1162-1164页

作者： Bin HU kun XIAO jing Kang SHEN State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaShanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 201203

A series of chiral N-Boc-α-aminoaldehydes were synthesized in good yields and high purity via esterification of Boc-L-amino acids followed by reduction with sodium bis （2-methoxy- ethoxy）aluminum hydride.

关键词： Aminoaldehyde reduction sodium bis(2-methoxyethoxy)aluminum hydride ester amino acid.

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美国公法域外适用机制及中国因应研究

海南大学学报（人文社会科学版） 2025年第1期43卷 195-206页

作者：田静南开大学法学院天津300071

公法域外适用衍生于国际体系的结构性演变,有着经济全球化下独特的政治、经济与意识形态背景。其在公法域外适用需求的显现、国家主权观念的转换、公法禁忌原则的突破以及法律形式的嬗变上,具备了一定的存在基础。但是近年来,囿于美国... 详细信息

公法域外适用衍生于国际体系的结构性演变,有着经济全球化下独特的政治、经济与意识形态背景。其在公法域外适用需求的显现、国家主权观念的转换、公法禁忌原则的突破以及法律形式的嬗变上,具备了一定的存在基础。但是近年来,囿于美国国际法理念的转变,其由原先对严格属地主义的固守转为对国家利益至上的推崇,因而在公法域外适用上愈发地恣意与专断,使公法域外适用存在严重的法律、外交和道德张力。为应对美国公法域外适用,中国须秉承防御与建设共进的思路。一方面,加强国际合作共同抗衡美国公法域外适用制度的滥用,同时健全中国的反制法律体系;另一方面,梳理总结美国多年来在公法域外适用过程中形成的丰富经验,在此基础上构建完善符合国际法基本原则的中国法域外适用制度。

关键词：域外适用管辖权效果原则公法禁忌

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Preparation of 2D square-like Bi2S3-BiOCl heterostructures with enhanced visible light-driven photocatalytic performance for dye pollutant degradation

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Water Science and Engineering 2017年第4期10卷 334-339页

作者： jing-jing Xu jing-wen Yang Pu Zhang Quan Yuan Yan-hong Zhu Yu Wang miao-miao Wu Zheng-mei Wang Min-dong Chen Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials Nanjing University of Information Science and TechnologyNanjing 210044China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing University of Information Science and TechnologyNanjing 210044China

A series of Bi2 S3-BiOCI composites with two-dimensional(2 D) square-like structures were prepared via a two-step anion exchange route.X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), and diffuse reflectance spectra(DRS)were used to investigate the properties of the as-prepared Bi_2 S_3-BiOCI heterostructures. The coupling of BiOCl and Bi_2 S_3 induced enhanced photoabsorption efficiency and bandgap narrowing. A reactive brilliant red X-3 B dye was used as a contaminant to test the photocatalytic activity of the obtained Bi_2 S_3-BiOCl samples under visible light irradiation. The sample Bi_2 S_3-BiOCl with a mass ratio of 8:4 exhibited the highest photodegradation efficiency, which was six times higher than that of pure BiOCl. In addition, a mechanism for the enhancement of photocatalytic activity is proposed.

关键词： Photocatalysis Bi2S3 BiOCl Visible light Heterostructure

Non-contacting characterization of oil-gas interface with terahertz wave

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Science China(Physics,Mechanics & Astronomy) 2016年第7期59卷 84-85页

作者： DanDan Wang XinYang miao HongLei Zhan Jin Wang kun Zhao Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum

Dear Editors, The interface ofoil and gas has been a key issue in the process of oil and gas storage and transportation, which is a preparatory work to improve the transport efficiency and prevent oil and gas leaks. There are many methods to characterize the in- terface of oil and gas, such as the ultrasonic transducers and multi-electrode capacitance level sensors. Recently, the application of terahertz （THz） technique has attracted much at- tention in the characterization and evaluation of oil and gas [1-7], such as a magnetic-field-induced disaggregation of the size of suspended colloidal particles in crude oil and pattern transitions of oil-water two-phase flow [6,7]. THz time-do- main spectroscopy （THz-TDS） was expected to detect the interface of oil and gas since oil and gas can be characterized with THz wave. In this letter, a drop of crude oil with its volatile gas from an oilfield, which is inserted in the middle of a resin craft, was selected to probe the interface between oil and gas.

关键词：油气界面太赫兹波接触特性 THz-TDS 液位传感器超声换能器油水两相流挥发性气体