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World Journal of Gastrointestinal Oncology 2023年第12期15卷 2185-2196页

作者： jin-bao Guo Ming Du Bin wang Li Zhong Zhong-Xue Fu jin-Lai Wei Department of Thoracic Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Obstetrics and Gynaecology The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Gastrointestinal Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

BACKGROUND It is unclear that paired-related homeobox 1(PRRX1)induces epithelialmesenchymal transition(EMT)in oesophageal cancer and the specific function of PRRX1 in oesophageal cancer *** To assess the signicance of PRRX1 expression and investigate the mechanism of EMT in oesophageal cancer *** Detect the expression of PRRX1 by immunohistochemistry in oesophageal tumour tissues and adjacent normal oesophageal tissues;the PRRX1 short hairpin RNA(shRNA)or blank vector lentiviral gene delivery system was transfected into cells;cell proliferation assay,soft agar colony formation assays,cell invasion and migration assays and animal studies were used to observe cells biological characteristics In vitro and in vivo;XAV939 and LiCl were used to alter the activity of Wnt/β-catenin *** staining and western blot analysis were used to detect protein expression of EMT markers and Wnt/β-catenin *** PRRX1 is expressed at high levels in oesophageal cancer specimens and is closely related to tumour metastasis in patients with oesophageal *** of PRRX1 expression might exert obvious effects on cell proliferation,especially the migration and invasion of oesophageal cancer ***,silencing PRRX1 expression using a shRNA produced the opposite *** addition,when PRRX1 was overexpressed,inhibition of the Wnt/β-catenin pathway with XAV939 negated the effect of PRRX1 on EMT,whereas when PRRX1 was downregulated,activation of the Wnt/β-catenin pathway with LiCl impaired the effect on *** PRRX1 is upregulated in oesophageal cancer is closely correlated with cancer ***,PRRX1 induces EMT in oesophageal cancer metastasis through activation of Wnt/β-catenin signalling.

关键词： Paired-related homeobox 1 Oesophageal squamous cancer Epithelial-mesenchymal transition Cancer metastasis

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Investigation of Portevin–Le Chatelier effect in rolled α-phase Mg-Li alloy during tensile and compressive deformation

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Journal of Materials Science & Technology 2020年第17期52卷 152-161页

作者： Xiaoqiang Li Chunlong Cheng Qichi Le Lei bao Peipeng jin Ping wang Liang Ren Hang wang Xiong Zhou Chenglu Hu Key Laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China Qinghai Provincial Key Laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai UniversityXining810016China

Avoiding the Portevin-Le Chatelier(PLC)effect is very important concern for wrought Mg-Li *** this study,the special PLC effect was found in rolled Mg-5Li-3Al-2Zn(LAZ532)alloy during tensile and compressive *** observing microstructure evolution of the alloy during tensile and compressive deformation,it was found that prismaticand pyramidalslips were activated during tensile deformation,resulting in plenty of dislocation *** the deformation process after compressive yielding,the deformations in coarse grains and fine grains were dominated by{1012}extension twinning and grain boundary slip,*** on experimental result analysis,the sudden appearance of PLC effect in the later stage of axial tensile deformation(along rolled direction)was caused by interaction between solute atoms and *** the process of axial compressive deformation(along rolled direction),PLC effect presented the complex and changeable phenomenon of appeared-disappeared-appeared,which was mainly caused by the continuous nucleation of twin in the material,the activation of grain boundary slip and the shear deformation of twin,respectively.

关键词： Mg-Li alloy Portevin-Le Chatelier effect Dynamic strain aging Twins

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Enhanced preparation of dendritic metallic vanadium in recyclable NaCl-KCl-VCl_(2) molten salt by V_(2)CO electrolysis

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Rare Metals 2024年第8期43卷 3961-3973页

作者： Jia-Liang An Ming-Yong wang Yong-Zheng Jia jin-Tao Zhang bao-Yan Feng Shu-Qiang Jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China College of Material Science and Engineering Hebei Province Laboratory of Inorganic Nonmetallic MaterialsNorth China University of Science and TechnologyTangshan 063210China

A promising method for the preparation of pure metallic vanadium via V_(2)CO anode electrolysis was proposed and *** simple and controllable synthesis of a molten chloride salt containing VCl_(2) by an insitu reaction between VCl_(3) and metallic vanadium was verified through thermodynamic analysis and ***-KCl-VCl_(2) molten salt exhibited excellent recycling performance and could be repetitively used to prepare metallic vanadium by V_(2)CO *** V^(2+) ions remained in the molten salt after *** electrolysis conditions,such as the cathode diameter,current density,V^(2+) ion concentration,and temperature,were optimised to maximise the current *** was also simulated to reveal the regulatory *** highest current efficiency was 85%.The purity of metallic vanadium was up to 99.8%.In this study,an easy and efficient preparation of pure metallic vanadium was achieved.

关键词： V_(2)CO Metallic vanadium Current efficiency Molten salt electrolysis

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Ternary phase diagrams and solvate transformation thermodynamics of omeprazole sodium in different solvent mixtures

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Chinese Journal of Chemical Engineering 2019年第2期27卷 362-368页

作者： Meitang jin Zhao Xu Ying bao Long Li Liping wang Haijiao Lu Chuang Xie Hongxun Hao School of Chemical Engineering and Technology Tianjin University Collaborative Innovation Centre of Chemical Science and Engineering

Omeprazole sodium(OMS), a typical non-hydrogen bond donors API, is only available in solvates so far, including monohydrate, ethanol solvate and methanol solvate. The methanol solvate was found for the first time. Solvate transformation thermodynamics of OMS was studied in this paper. First, the ternary phase diagrams forming two solvates for OMS in binary solvent mixtures including methanol + water, ethanol + water, and methanol+ ethanol were measured at temperature ranging of T =(278.15 to 313.15) K under atmospheric pressure. Further, the standard equilibrium constants of the solvate transformation reactions were evaluated according to the chemical reaction isothermal equation. The standard molar Gibbs free energy, the standard molar enthalpy, and the standard molar entropy of solvate transformation reactions were then calculated based on van't Hoff equation. Moreover, the thermodynamic stability of the OMS solvate was analyzed based on phase diagram. The results are of great importance to develop a crystallization process for manufacturing OMS solvate, and could be helpful to other solvate transformation research.

关键词： Omeprazole sodium Solvate Phase equilibria Ternary phase diagram Chemical reaction Thermodynamics

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Mechanical and magnetic hysteresis as indicators of the origin and inception of fatigue damage in steel

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第8期11卷 580-586页

作者： Sheng bao Wei-liang jin Ming-feng HUANG Institute of Structural Engineering Zhejiang University Hangzhou 310058 China

N2 and N3 are known as the transition points of the three principal stages of fatigue: initial accommodation, accretion of damage and terminal fatigue. Many experiments show that the ratios of N2/Nf and N3/Nf tend to be stable even though the specific N2 and N3 values may fluctuate widely. The primary goal of this research is to study the piezomagnetic field surrounding AISI 1018 steel specimen under repeated loads and to find the ratio values of N2/Nf and N3/Nf by analyzing 11 sets of low-cycle fatigue data. An MTS-810 testing system with a peak capacity of 222 kN was used to obtain the data which consisted of stress, strain, and piezomagnetic field. A computer program was constructed to track the evolution of the piezomagnetic field and re- gression analysis was carried out to determine N2 and N3 values. It was observed that there exists a consistent relationship between N2 and Nf. The apparent invariance of the ratio N2/Nf implies that N2 may be identified as an index of performance in the early loading response of a specimen that forecasts its fatigue life, Nf. It has been demonstrated that measurements of the magnetic and mechanical hysteresis can yield significant insights into the various stages of the development of a fatigue critical microstructure which culminates in complete rupture of the material.

关键词： Piezomagnetic effects. Fatigue damage. Mechanical hvsteresis. Magnetic hysteresis

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Salt-assisted chemical vapor deposition of two-dimensional materials

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Science China Chemistry 2019年第10期62卷 1300-1311页

作者： Wei Han Kailang Liu Sanjun Yang Fakun wang Jianwei Su bao jin Huiqiao Li Tianyou Zhai State Key Laboratory of Material Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology

Two-dimensional(2D) materials with atomic thickness are promising candidates for the applications in future semiconductor devices, owing to their fascinating physical properties and superlative optoelectronic performance. Chemical vapor deposition(CVD) is considered to be an efficient method for large-scale preparation of 2D materials toward practical ***, the high melting points of metal precursors and the thermodynamics instabilities of metastable phases limit the direct CVD synthesis of plenty of 2D materials. The salt has recently been introduced into the CVD process, which proved to be effective to address these issues. In this review, we highlighted the latest progress in the salt-assisted CVD growth of 2D materials, including layered and non-layered crystals. Firstly, strategies of adding salts are summarized. Then, the salt-assisted growth of various layered materials is presented, emphasizing on the transition metal chalcogenides of stable and metastable phases. Furthermore, strategies to grow ultrathin non-layered materials are discussed. We provide viewpoints into the techniques of using salt, the effects of salt, and the growth mechanisms of 2D crystals. Finally, we offer the challenges to be overcome and further research directions of this emerging salt-assisted CVD technique.

关键词： salt-assisted chemical vapor deposition 2D materials transition metal dichalcogenides non-layered materials

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Lead toxicity thresholds in 17 Chinese soils based on substrate-induced nitrification assay

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Journal of Environmental Sciences 2016年第6期28卷 131-140页

作者： Ji Li Yizong Huang Ying Hu Shulan jin Qiongli bao Fei wang Meng Xiang Huiting Xie Agro-Environmental Protection Institute Ministry of Agriculture Tianjin 300191 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Shangrao Normal University Shangrao 334000 China

The influence of soil properties on toxicity threshold values for Pb toward soil microbial processes is poorly recognized. The impact of leaching on the Pb threshold has not been assessed systematically. Lead toxicity was screened in 17 Chinese soils using a substrate-induced nitrification（SIN） assay under both leached and unleached *** effective concentration of added Pb causing 50% inhibition（EC50） ranged from 185 to〉 2515 mg/kg soil for leached soil and 130 to 〉 2490 mg/kg soil for unleached soil. These results represented 〉 13- and 〉 19-fold variations among leached and unleached soils,respectively. Leaching significantly reduced Pb toxicity for 70% of both alkaline and acidic soils tested, with an average leaching factor of 3.0. Soil p H and CEC were the two most useful predictors of Pb toxicity in soils, explaining over 90% of variance in the unleached EC50 value. The relationships established in the present study predicted Pb toxicity within a factor of two of measured values. These relationships between Pb toxicity and soil properties could be used to establish site-specific guidance on Pb toxicity thresholds.

关键词： Pb toxicity Leaching Nitrification assay Risk assessment

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EFFECTS OF WATER TABLE AND NITROGEN ADDITION ON CO_2 EMISSION FROM WETLAND SOIL

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Chinese Geographical Science 2005年第3期15卷 262-268页

作者： YANG Ji-song LIU jing-shuang YU Jun-bao wang jin-da QIN Sheng-jin LI Xin-hua Northeast institute of Geography and Agricuhural Ecology Chinese A ctutemy of Sciences Changchun 130012 P. R.China Graduate School of Chinese Academy of Sciences Beijing 100019 P. R. China

Soil respiration is a main dynamic process of carbon cycle in wetland. It is important to contribute to global climate changes. Water table and nutritious availability are significant impact factors to influence responses of CO2 emission from wetland soil to climate changes. Twenty-four wetland soil monoliths at 4 water-table positions and in 3 nitrogen status have been incubated to measure rates of CO2 emission from wetland soils in this study. Three static water-table controls and a fluctuant water-table control, with 3 nitrogen additions in every water-table control, were carried out. In no nitrogen addition treatment, high CO2 emissions were found at a static low water table (Ⅰ) and a fluctuant water table (Ⅳ), averaging 306.7mg/(m2·h) and 307.89mg/(m2·h), respectively, which were 51%-57% higher than that at static high water table (Ⅱ and Ⅲ). After nitrogen addition, however, highest CO2 emission was found at Ⅱ and lowest emission at Ⅲ. The results suggested that nutritious availability of wetland soil might be important to influence the effect of water table on the CO2 emission from the wetland soil. Nitrogen addition led to enhancing CO2 emissions from wetland soil, while the highest emission was found in 1N treatments other than in 2N treatments. In 3 nutritious treatments, low CO2 emissions at high water tables and high CO2 emissions at low water tables were also observed when water table fluctuated. Our results suggested that both water table changes and nutritious imports would effect the CO2 emission from wetland.

关键词： CO2 emission water table nitrogen addition wetland soil

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Soil nutrients in relation to vertical roots distribution in the riparian zone of Three Gorges Reservoir,China

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Journal of Mountain Science 2018年第7期15卷 1498-1509页

作者： ZHONG Rong-hua HU jin-ming bao Yu-hai wang Fei HE Xiu-bin Yunnan Key Laboratory of International Rivers and Transboundary Eeo-security Kunming 650091 China Institute oflnternational Rivers and Eco-security Yunnan University Kunming 650091 China Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China

Since the impoundment of the Three Gorges Reservoir(TGR), the riparian zone has been subjected to numerous environmental changes. This study was conducted to recognize the distribution of grass roots and its impacts on soil nutrients in the water level fluctuation zone of TGR. Roots of four predominant herbaceous plants in the study area, specifically, Cynodon dactylon, Hemarthria altissima, Hemarthria compressa, and Paspalum paspaloides, and their corresponding relation with soil nutrient contents were investigated. Root surface area density was determined with Win RHIZO, and the relationships of root distribution with soil depths and soil nutrient contents were studied. The results indicates that most roots are distributed in the top soil layer of 0-10 cm. Estimated root surface area density for the selected grass species ranges from 0.16 to 13.44 cm^2/cm^3, and decreases exponentially with an increase in soil depth. Soil organic matter and total nitrogen contents are significantly lower on bare control area than the corresponding values on the grasslands. Total nutrient contents on grasslands of C. dactylon and H. compressa are higher than those of other grass areas. Root length density and root surface area density are significantly correlated with soil organic matter and total nitrogen content for the four grasslands. The present results suggests that plant roots have significant effects on the distribution of soil nutrients in soil profiles in the riparian zone along the TGR. Nevertheless, additional investigations are needed to reveal the specific interactions between plant roots distribution, soil nutrients and water level fluctuations.

关键词： Roots distribution Soil nutrients Water level fluctuations Riparian zone Root surface area density Root length density

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Morphologies and Influential Factors of Forsterite Film in Grain-Oriented Silicon Steel

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Journal of Iron and Steel Research International 2013年第11期20卷 105-110页

作者： FU Yong-jun JIANG Qi-wu wang bao-chuan YANG Ping jin Wen-xu School of Materials Science and Engineering University of Science and Technology Beijing Anshan Steel Co. Ltd.Cold Rolling Silicon Plant

The product quality of graiworiented silicon steel may be affected by each process because of its complicat- ed production technology. Morphologies, compositions and structures of forsterite film formed in different conditions on the samples subjected to high temperature annealing were measured by using a scanning electron microscope, an energy disperse spectroscope, an X ray diffractometer and Fourier transform infrared technique respectively. The morphologies and influential factors of forsterite film were investigated. The results showed that the major compo- nent of forsterite film composed of light-gray spherical particles was Mg2 SiO4, and the minor was MgAl2O4. If the amount of MgO coated on the surface of the steel was less, bare holes or even large-scale bare grains for forsterite film appeared. The higher temperature of water bath during decarburization annealing led to gaps of strips in forster ite film. Moreover, MgO coating method had great influence on forsterite film. Roller coating method was beneficial to increase compactness and smoothness of forsterite film, but was disadvantageous to its thickness.

关键词： grain-oriented silicon steel forsterite film bare grain

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