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二叶主动脉瓣伴动脉夹层破裂1例

法医学杂志 2024年第1期40卷 77-79页

作者：徐碧宇吴晨阳姬艳琦李莹莹宋旭东华北理工大学附属医院病理科河北唐山063000

1案例1.1简要案情及病史摘要某男,35岁,因“持续性胸闷18 h”入院。入院后1 h行急性冠状动脉造影检查示:左冠状动脉开口及起源正常,左主干、前降支及回旋支正常,可见前降支至右冠状动脉侧支形成,血流分级(thrombolysis in myocardial in... 详细信息

1案例1.1简要案情及病史摘要某男,35岁,因“持续性胸闷18 h”入院。入院后1 h行急性冠状动脉造影检查示:左冠状动脉开口及起源正常,左主干、前降支及回旋支正常,可见前降支至右冠状动脉侧支形成,血流分级(thrombolysis in myocardial infarction,TIMI)1级;右冠状动脉开口朝上变异,近段次全闭塞,前向血流TIMI1级;结论为右冠状动脉单支病变,右冠状动脉开口朝上变异,冠状动脉分布呈右优势型。遂于右冠状动脉近段植入HELICOS(4.0 mm×22.0 mm)支架1枚。

关键词：法医病理学二叶主动脉瓣主动脉夹层动脉夹层破裂

Synthesis and Erosion behaviors of Nanoscale Coatings Prepared by Wire Arc Spraying

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稀有金属材料与工程 2012年第S1期41卷 144-147页

作者： Cheng, J. b. Xiang, X. b. Wang, Z. H. xu, b. S. Hohai Univ Coll Mech & Mat Nanjing 210098 Jiangsu Peoples R China Natl Key Lab Remfg Beijing 100072 Peoples R China

The effects of erosive parameters,such as impact angles and environment temperature,on erosion properties of FebSiCrMnNb nanoscale coatings were investigated.A series of coatings were prepared by wire arc spraying *** microstructure of the coating consists of amorphous andα(Fe,Cr)nanocrystalline *** nanocrystals with average size of 39 nm are homogenously dispersed in amorphous *** erosion results reveal that the coating exhibits better erosion resistance at lower impact *** erosion rates of the coating decrease as function of environment *** relatively erosion resistance of the nanoscale coating is 3.7 times higher than that of AISI1045 steel substrate at 650°*** main failure mechanism of the coating is brittle fracture.

关键词： coatings nano materials abrasive

AN HREM STUDY OF A LATERAL MICROCRACK bENEATHINDENTATION OF [001] SILICON

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Acta Metallurgica Sinica(English Letters) 1998年第5期11卷 342-346页

作者： Y.Q.Wu X.Y.Yang Y.b.xu Inst of Metal Research The Chinese Acad of Sciences Shenyang China

A cross-sectional sample of indentation in [001] silicon was made and a lateral microcrack beneath the indentation was observed by high resolution electron microscope (HREM). The HREM images around the microcrack tip show an alternate distribution of the amorphous and lattice structure. The crack does not propagate by the successive debonding between certain atomic planes, meaning that before a crack completely opens, there may be a stage of amorphization, resulting from severe distortion of lattice.

关键词： amorphization lateal crack indentation HREM silicon

A brassinosteroid-Signaling Kinase Interacts withMultiple Receptor-Like Kinases in Arabidopsis

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Molecular Plant 2014年第2期7卷 441-444页

作者： Peng xu[a,b] Shou-Ling xu[b,c] Zi-Jing Li[a] Wenqiang Tang[a] Alma L. burlingame[c] Zhi-Yong Wang[b] [a]Institute of Molecular and Cell biology Hebei Key Laboratory of Molecular and Cellular Biology College of Life Sciences Hebei Normal University Shijiazhuang Hebei 050024 China [b]Department of Plant biology Carnegie Institution for Science Stanford CA 94305 USA [c]Department of Pharmaceutical Chemistry University of California San Francisco CA 94143 USA

Dear Editor, Higher plants have evolved hundreds of genes encodingreceptor-like kinases （RLKs）, which function as cell surfacereceptors perceiving developmental and environmental sig-nals （Shiu et al., 2004）. Many RLKs have been shown to playspecific roles in hormone responses, developmental regula-tion, defense against pathogen infection, and adaptationto abiotic stresses （Chae et al., 2009; Antolin-Llovera et al.,2012）. The mechanisms that ensure specific signal transduc-tion from each RLK to target cellular responses remain poorlyunderstood. Recent studies revealed that many RLKs trans-duce signals by phosphorylating receptor-like cytoplasmickinases （RLCKs）, which lack the transmembrane domainsbut are anchored at the plasma membrane through lipidmodification （Tang et al., 2008; Zhang et al., 2010; Shi et al.,2013）. There are over 400 RLKs and only about 150 RLCKs inArabidopsis （Shiu et al., 2004）. One outstanding question iswhether each RLCK mediates signaling downstream of a spe-cific RLK, participates in multiple RLK pathways, or mediatescrosstalk between RLK pathways.

关键词： bRASSINOSTEROIDS RESEARCH PLANT hormones PLANT cellular signal transduction CELL receptors ARAbIDOPSIS IMMUNOPRECIPITATION NICOTIANA benthamiana

Si-Al COATING ON PURE MOLYbDENUM SUbSTRATE AND ITS CYCLIC OXIDATION bEHAVIOR

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 672-676页

作者： F.S.Liu J.L.xu C.G.Zhou S.K.Gong H.b.xu SchoolofMaterialsScienceandEngineering BeijingUniversityofAeronauticsandAstronauticsBeijing100083China

The halide-activated pack cementation method is utilized to codeposit aluminum and silicon on Mo substrate. Emphasis is placed on the microstructure and elevated-temperature oxidation resistance of coatings. The results show that hexagonal Mo(Si, Al)2 as a main phase and a little amount of the lower disilicide Mo5Si3 was formed on Mo substrate through the halide-activated pack cementation method. The resultant Si-Al coating on Mo substrate exhibits excellent cyclic oxidation resistance. The excellent cyclic oxidation resistance of the coatings is attributed to the formation of alumina on the coatings during the oxidation.

关键词： Mo(Si Al)2 coating co-deposition cyclic oxidation resistance

A corrected particle method with high-order Taylor expansion for solving the viscoelastic fluid flow

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Acta Mechanica Sinica 2017年第1期33卷 20-39页

作者： T. Jiang J. L. Ren W. G. Lu b. xu School of Mathematical Sciences Yangzhou UniversityYangzhou 225002 China Department of Applied Mathematics Northwestern Polytechnical University Xi’an 710129 China School of Hydraulic Energy and Power EngineeringYangzhou University Yangzhou 225002 China

In this paper, a corrected particle method based on the smoothed particle hydrodynamics (SPH) method with high-order Taylor expansion (CSPH-HT) for solving the viscoelastic flow is proposed and investigated. The validity and merits of the CSPH-HT method are first tested by solving the nonlinear high order Kuramoto-Sivishinsky equation and simulating the drop stretching, respectively. Then the flow behaviors behind two stationary tangential cylinders of polymer melt, which have been received little attention, are investigated by the CSPH-HT method. Finally, the CSPH-HT method is extended to the simulation of the filling process of the viscoelastic fluid. The numerical results show that the CSPH-HT method possesses higher accuracy and stability than other corrected SPH methods and is more reliable than other corrected SPH methods.

关键词： Smoothed particle hydrodynamics High-order Taylor expansion Viscoelastic fluid Extended pom-pom model

CALCULATION OF TRANSFORMATION VOLUME FRACTION TO HQ590 HOT ROLLED STRIP STEEL DURING CONTINUOUS COOLING

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 754-760页

作者： X.G.Zhou X.M.Zhao Y.b.xu D.Wu TheStateKeyLab.ofRollingTechnologyandAutomation NortheasternUniversityShenyang110004China

On the basis of phase transformation kinetics, the transformation of γ→α,P,b have been investigated through considering the effect of deformation. The calculation methods of volume fraction have also been given. Co... 详细信息

关键词： transformation kinetics volume fraction nucleation rate

LOW ENERGY TRIPLE DIFFERENTIAL CROSS SECTIONS FOR ELECTRON IMPACT IONIZATION OF HYDROGEN

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原子与分子物理学报 1998年第3期 25-29页

作者： Chen Zhangjin a,b xu Kezun b xu Fuxin aa Department of Physics, Anhui Unviersity Hefei 230039 b Department of Modern Physics, University of Science and Technology of China Hefei 230027

ＬＯＷＥＮＥＲＧＹＴＲＩＰＬＥＤＩＦＦＥＲＥＮＴＩＡＬＣＲＯＳＳＳＥＣＴＩＯＮＳＦＯＲＥＬＥＣＴＲＯＮＩＭＰＡＣＴＩＯＮＩＺＡＴＩＯＮＯＦＨＹＤＲＯＧＥＮＣｈｅｎＺｈａｎｇｊｉｎａ，ｂＸｕＫｅｚｕｎｂＸｕＦｕｘｉｎ... 详细信息

ＬＯＷＥＮＥＲＧＹＴＲＩＰＬＥＤＩＦＦＥＲＥＮＴＩＡＬＣＲＯＳＳＳＥＣＴＩＯＮＳＦＯＲＥＬＥＣＴＲＯＮＩＭＰＡＣＴＩＯＮＩＺＡＴＩＯＮＯＦＨＹＤＲＯＧＥＮＣｈｅｎＺｈａｎｇｊｉｎａ，ｂＸｕＫｅｚｕｎｂＸｕＦｕｘｉｎａａＤｅｐａｒｔｍｅｎｔｏｆＰｈｙ...

关键词： Electron impact ionization Triple differential cross section bbK DS3C

Comparison study of two aldehyde group finishing agents in surface modification of up-conversion luminescence materials

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Rare Metals 2008年第2期27卷 127-130页

作者： CUI Lili FAN Huili XIAO Junping xu Xiaowei Department of Chemistry University of Science and Technology Beijing Beijing 100083 China Department of Inorganic Nonmetallic Materials University of Science and Technology Beijing Beijing 100083 China

Surface modification of up-conversion luminescence materials （Na[Y0.57Yb0.39Er0.04]F4 modified by amino groups） by grafting and modifying with aldehyde groups was studied by means of Fourier transform infrared spectroscopy （FTIR）, scanning electron microscopy （SEM）, thermogravimetric analysis （TGA）, and emission spectrum （EM）. The surface modification effect was compared using two different finishhag agents, p-phthalaldehyde and glutaraldehyde. It was found that the surface of up-conversion luminescence materials could be modified by aldehyde groups of the two finishing agents, the systematic dispersibility and the thermostability of the up-conversion luminescence material modified by p-phthalaldehyde were better than those of the material modified by glutaraldehyde, and the luminous intensity of the material modified by p-phthalaldehyde was increased. The AI （the ratio of the suspended segmental quality in the specimen to the total mass of the specimen） of the material modified by p-phthalaldehyde was higher than that of the material modified by glutaraldehyde. It is obviously seen that the embellishment effect of p-phthalaldehyde as a finishing agent was better than that of glutaraldehyde. In addition, the reasons why p-phthalaldehyde is a good finishing agent are also explained.

关键词： luminescence materials up-conversion surface modification luminescence aldehyde groups