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Secondary aortoesophageal fistula initially presented with empyema after thoracic aortic stent grafting:A case report

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World Journal of Clinical Cases 2021年第29期9卷 8938-8945页

作者： De-Qiong Wang mei Liu Wen-juan Fan Department of Gastroenterology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030Hubei ProvinceChina

BACKGROUND Massive upper gastrointestinal(GI)bleeding is usually urgent and severe,and is mostly caused by GI *** fistula(AEF)after thoracic aortic stent grafting is a rare cause of this condition,and has a poor prognosis with a high mortality *** clinical symptoms of AEF are usually nonspecific,and the diagnosis is often difficult,especially when upper GI bleeding is *** identification,early diagnosis,and early treatment are very important for improving *** SUMMARY A 74-year-old man was admitted to the infectious disease department with>10-d fever and 10-mo prior history of thoracic aortic stent grafting for thoracic aortic penetrating *** tests revealed elevated inflammatory indicators and *** computed tomography(CT)showed postoperative changes of the aorta after endovascular stent graft implantation,pulmonary infection and pleural *** effusion tests showed *** 1 wk of anti-infective treatment,temperature returned to normal and chest CT indicated improvement in pulmonary infection and reduction of pleural *** endoscopy was performed because of epigastric discomfort,and showed a large ulcer with blood clot in the middle ***,on day 11,hematemesis and melena developed *** stopped temporarily after hemostatic treatment and bedside endoscopic *** and abdominal aortic CT angiography confirmed *** that day,he suffered massive hemorrhage and hemorrhagic ***,his family elected to discontinue *** AEF should be strongly considered in patients with a history of aortic intervention who present with fever,especially with empyema.

关键词： Gastrointestinal hemorrhage Esophageal fistula Esophageal perforation Thoracic aorta Empyema Case report

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Review of pantograph and catenary interaction

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Frontiers of Mechanical Engineering 2018年第2期13卷 311-322页

作者： Weihua ZHANG Dong zou Mengying TAN Ning ZHOU Ruiping LI Guiming mei State Key Laboratory of Traction Power Southwest Jiao Tong University Chengdu 610031 China

The application of electrified railway directly promotes relevant studies on pantograph-catenary interac- tion. With the increase of train running speed, the operating conditions for pantograph and catenary have become increasingly complex. This paper reviews the related achievements contributed by groups and institutions around the world. This article specifically focuses on three aspects： The dynamic characteristics of the panto- graph and catenary components, the systems＇ dynamic properties, and the environmental influences on the pantograph-catenary interaction. In accordance with the existing studies, future research may prioritize the task of identifying the mechanism of contact force variation. This kind of study can be carried out by simplifying the pantograph-catenary interaction into a moving load problem and utilizing the theory of matching mechanical impedance. In addition, developing a computational platform that accommodates environmental interferences and multi-field coupling effects is necessary in order to further explore applications based on fundamental studies.

关键词： electrified railway pantograph and catenary interaction contact force variation moving load problem mechanical impedance multi-field

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Preparation and application of SBA-15-supported palladium catalyst for Heck reaction in supercritical carbon dioxide

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Chinese Chemical Letters 2011年第6期22卷 643-646页

作者： Xiu juan Feng mei Yan Xin Zhang Ming Bao State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116012China School Environmental Science & Technology Dalian University of TechnologyDalian 116023China

A new method for the preparation of SBA-15-supported palladium catalyst for Heck reaction in supercritical carbon dioxide was *** newly formed SBA-15-supported palladium catalyst（Ph-SBA-15-PPh_3-Pd） exhibited high catalytic activity for the Heck reaction of 4-nitrobromobenzene with methyl *** catalyst can be reused several times without a loss of activity.

关键词： SBA-15-supported palladium catalyst Heck reaction Supercritical carbon dioxide

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A Study of Surfactant-Induced Growth of Ag on Ag (111)

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Communications in Theoretical Physics 2008年第12期50卷 1439-1442页

作者： WU Li-Li HU juan-mei WU Feng-Min College of Mathematics and Physics Information Engineering Zhejiang Normal University Jinhua 321004 China

A new growth model is introduced to describe surfactant-induced growth of Ag on Ag （111） with realistic physical parameters. In this model, the A-S exchange mechanism is considered for the first time. Using the Monte Carlo simulations, the influence of exchange mechanism, surface temperature T, the exchange barrier Eεx, and the coverage of surfactant θM on the growth mode and morphology during multilayer film growth of Ag/Ag （111） are studied in detail Both the referenced value of surfactant coverage and the method to obtain perfect layer-by-layer film in surfactantinduced Ag/Ag （111） system are provided. Our simulation results are consistent with many experimental observations for surfactant-induced growth of Ag on Ag （111）.

关键词： surfactant surface roughness exchange Monte Carlo simulation

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Quantitative Phase Field Simulation of α Particle Dissolution in Ti–6Al–4V Alloys Below β Transus Temperature

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Acta Metallurgica Sinica(English Letters) 2017年第8期30卷 745-752页

作者： mei Yang Gang Wang Tao Liu Wen-juan Zhao Dong-Sheng Xu School of Materials and Engineering Jiangsu University of Technology Department of Material Science and Engineering South China University of Technology School of Mechanical Engineering Xiangtan University Institute of Metal Research Chinese Academy of Sciences

A quantitative phase field method of multi-component diffusion-controlled phase transformations coupled with the Kim-Kim-Suzuki model was applied to study the effect of initial particle size distribution （PSD） in 3D and space distribution in 2D on dissolution of α particles in Ti-6Al-4V alloy below β transus temperature in real time and length scale. The thermodynamic and mobility data were obtained from Thermo-Calc and DICTRA softwares, respectively. The results show that the volume fractions of α particles decay with time as： f =feq ＋（f0 -feq） exp（-Ktn） for four cases of PSD. The sequence of dissolution kinetics from fast to slow is： uniform PSD, normal PSD, lognormal PSD and bimodal PSD. The space distribution is found to be a major factor affecting the dissolution kinetics and the microstructures. When the distance of the particles is less than critical value, the dissolution rates reduce with the decrease in distance. The Al and V concentration fields around the particles appear more obvious soft impingement.

关键词： Dissolution Phase field model Ti-6Al-4V Initial PSD Space distribution

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Ultraviolet Resistance and Antimicrobial Properties of ZnO in the Polypropylene Materials:A Review

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Journal of Materials Science & Technology 2015年第4期31卷 331-339页

作者： mei Li Gu Li juan Jiang Zishou Zhang Xin Dai Kancheng Mai Key Laboratory of Polymeric Composites and Functional Materials of Ministry of Education Guangdong Provincial Key Laboratory of High Performance Polymer-based CompositesSchool of Chemistry and Chemical EngineeringSun Yat-sen University

ZnO is a multifunctional material with UV-blocking,antimicrobial,photo-catalytic activity and selfcleaning *** application of ZnO has become an interesting subject both in science and industries in the polymer materials.A great number of investigation indicated that introduction of ZnO can improve ultraviolet resistance and endow antimicrobial properties of polypropylene(PP) materials to broaden the application range and prolong the usage life of polypropylene *** mini-review contains examples of recent research advances on ultraviolet resistance and antimicrobial properties of ZnO in the filled polypropylene *** is found that ultraviolet resistance and antimicrobial properties of ZnO supported on the surface of other inorganic particles are higher than those of nanoand micro-ZnO particles,which may inspire further developments of filled PP and its copolymer materials with high ultraviolet resistance and antimicrobial properties.

关键词： Ultraviolet resistance Antimicrobial properties Po

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Mitofusion 2 Overexpression Decreased Proliferation of Human Embryonic Lung Fibroblasts in Acute Respiratory Distress Syndrome through Inhibiting RAS-RAF-1-ERK1/2 Pathway

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Current Medical Science 2020年第6期40卷 1092-1098页

作者： juan LI mei-xia XU Zhong DAI Tao XU Department of Critical Care Medicine Wuhan Fourth Hospital(Puai Hospital)Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Acute respiratory distress syndrome(ARDS)is one of the most fatal diseases *** fibrosis occurs early in ARDS,and its severity plays a crucial role in ARDS mortality *** studies suggested that fibroproliferation is an essential mechanism in ***2(Mfn2)overexpression plays a role in inhibiting cell ***,the role and potential mechanism of Mfn2 on the proliferation of fibroblasts is still *** this study,we aimed at exploring the effect of Mfn2 on the human embryonic lung fibroblasts(HELF)and discussed its related *** HELF were treated with the Mfn2 overexpressing lentivirus(adv-Mfn2).The cell cycle was detected by flow ***,PCR and Western blotting were used to investigate the effect of Mfn2 on the proliferation of the HELF,collagen expression,the RAS-RAF-1-ERK1/2 pathway and the expression of cycle-related proteins(p21,p27,Rb,Raf-1,p-Raf-1,Erk1/2 and p-Erk1/2).The co-immunoprecipitation assay was used to explore the interaction between Mfn2 and *** results showed that the overexpression of Mfn2 inhibited the proliferation of the HELF and induced the cell cycle arrest at the G0/G1 ***,Mfn2 also inhibited the expression of collagen I,p-Erk and *** addition,an interaction between Mfn2 and Ras existed in the *** study suggests that the overexpression of Mfn2 can decrease the proliferation of HELF in ARDS,which was associated with the inhibition of the RAS-RAF-1-ERK1/2 *** results may offer a potential therapeutic intervention for patients with ARDS.

关键词： Mitofusion2 human embryonic lung fibroblasts acute respiratory distress syndrome RAS-RAF-1-ERK1/2 pathway

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A new non-fullerene acceptor based on the heptacyclic benzotriazole unit for efficient organic solar cells

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Journal of Energy Chemistry 2020年第3期29卷 169-173页

作者： mei Luo Liuyang Zhou Jun Yuan Can Zhu Fangfang Cai Jiefeng Hai Yingping zou College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083HunanChina Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004GuangxiChina

Non-fullerene acceptors(NFAs)become an interesting family of organic photovoltaic materials,and have attracted considerable interest for their great potential in manufacturing large-area flexible solar panels by low cost coating methods[1–5].Recently,our group proposed in the first time an A-DA’D-A molecular strategy and synthesized a new class of non-fullerene acceptor Y6 with a record efficiency above 15%with single junction organic solar cells(OSCs)[6].To further improve the photovoltaic performance of OSCs,many effective strategies have been successfully explored,such as side-chain engineering and extension of fused core and terminal group engineering[7–12].As well-known,PCE of devices is determined by the open circuit voltage(Voc),short-circuit current density(Jsc)and fill factor(FF)[13].Among them,Voc is associated with low-lying highest occupied molecular orbital(HOMO)of donor and lowest unoccupied molecular orbital(LUMO)of acceptor of the active layer[14–16].Side-chain engineering is an effective strategy for manipulating energy levels and improving photovoltaic performance of devices[17–19].For example,introducing the alkyl/alkoxy chains can effectively tune the HOMO/LUMO energy levels[20–22].Tang et *** reported a novel non-fullerene acceptor ***6-IC has relatively high LUMO level and high Voc than those of ITIC due to the introduction of weak electrondonating hexyl group on thiophene[23].

关键词： Near-infrared electron acceptor Y9 Ladder-type heptacyclic fused ring Non-fullerene electron acceptors High-performance OSCs

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The masking condition for the quantum state in two-dimensional Hilbert space

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Communications in Theoretical Physics 2022年第11期74卷 77-83页

作者： mei-yi Wang Su-juan Zhang Chen-ming Bai Lu Liu Department of Mathematics and Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China

This paper focuses on quantum information masking for the quantum state in two-dimensional Hilbert *** present a system of equations as the condition of quantum information *** is shown that quantum information contained in a single qubit state can be masked,if and only if the coefficients of the quantum state satisfy the given system of *** observing the characteristics of non-orthogonal maskable quantum states,we obtain a related conclusion,namely,if two non-orthogonal two-qubit quantum states can mask a single qubit state,they have the same number of terms and the same ***,for maskable orthogonal quantum states,we analyze two special examples and give their images for an intuitive description.

关键词： quantum information masking limited conditions two-qubit

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Triterpenoids from Uncaria rhynchophylla and Their PTP1B Inhibitory Activity

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Phyton-International Journal of Experimental Botany 2022年第8期91卷 1809-1816页

作者： Shuaibin Luo Xuemei Zhang Kang He juan zou Chang-An Geng Guizhou University of Traditional Chinese Medicine Guiyang550025China State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesYunnan Key Laboratory of Natural Medicinal ChemistryKunming650201China

Uncaria rhynchophylla(Gouteng)is a famous traditional Chinese medicine used for psychiatric and hypotensive purposes in *** this study,the ethyl acetate(EtOAc)part of *** was revealed with protein tyrosine phosphatase 1B(PTP1B)inhibitory *** investigation on the EtOAc part yielded one new triterpenoid,3β-formyloxy-6β,19α-dihydroxyurs-12-en-28-oic acid(1)and four known ones,3β,6β,19α-trihydroxyurs-12-en-28-oic acid(2),2-oxopomolic acid(3),3β,19α-dihydroxy-6-oxo-olean-12-en-28-oic acid(4)and sumaresinolic acid(5).The structure of compound 1 was determined by extensive HRESIMS,IR,1D and 2D NMR spectroscopic *** ursane-type triterpenoids(2 and 3)showed selective inhibition on PTP1B with IC50 values of 48.2 and 178.7μ*** enzyme kinetic study suggested that compounds 2 and 3 were mixtype inhibitors on PTP1B with Ki values of 15.6 and 132.5μ*** investigation manifests the antidiabetic potency of *** with triterpenoids as the active constituents.

关键词： Uncaria rhynchophylla triterpenoids antidiabetic effects PTP1B inhibitors

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