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Fluids administration and coagulation characteristics in patients with different model for end-stage liver disease scores undergoing orthotopic liver transplantation

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Chinese Medical Journal 2007年第22期120卷 1963-1968页

作者： li min zhang li-ping yang lu Department of Anesthesiology Peking University Third Hospital Beijing 100083 China

Background There have been many studies investigating the impact of the model for end-stage liver disease （MELD） score on predicting post-transplant outcome. But it is unclear whether MELD is correlated to intraoperative fluid therapy and coagulation status. We investigated the relationship between the severity of liver diseases as measured by MELD score and intraoperative fluid requirements and the changes of coagulation characteristics. Methods Ninety patients were included in this retrospective study. The patients were stratified into three groups according to the MELD scores：〈15 （low）, 15-25 （medium） and 〉25 （high）. Intraoperatively, volume was restored with allogeneic and/or salvaged red blood cells （RBC）, fresh-frozen plasma （FFP）, platelet and other types of fluids according to hemodynamic data, hematocrit, and clotting data. Intraoperative coagulation data, blood requirements and other fluids administered were compared among the 3 groups. Results Before surgery, in addition to the three variables used to calculate MELD scores in other baseline laboratory values, including ratio of activated partial thromboplastin time （R-APTT）, D-Dimer, hematocrit, platelet and blood urea nitrogen （BUN） were significantly different among the 3 groups. The blood loss increased with increasing MELD. The volume of RBC （allogeneinc, salvaged and total）, FFP, platelet and the total volume of transfusion were also significantly different among the three groups （P〈0.01）. The requirements for prothrombin complex and fibrinogen showed a similar pattern. During operation, the changing trends of each coagulation variable were different. Compared with baseline, during each intraoperative stage, INR and R-APPT increased in the low MELD group. While in the medium MELD and high MELD groups, INR did not changed significantly during the operation, and R-APPT significantly increased only after reperfusion. Conclusions This study provided some useful information for perioperative manage

关键词： liver transplantation fluid therapy coagulation, blood

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Universal design of three-dimensional porous graphene-iron based promotors for kinetically rationalized lithium-sulfur chemistry

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Journal of Energy Chemistry 2025年第1期100卷 192-200页

作者： Hua Gao Yunfeng zhang Menglei Wang Ruoxuan yang Shuai Feng Xuan Cao Yaping zhang Zhongyuan lu Yingze Song State Key Laboratory of Environment-Friendly Energy Materials School of Materials and Chemistry Southwest University of Science and Technology School of Material Science and Engineering Henan University of Technology College of Chemistry and Chemical Engineering Taishan University

lithium-sulfur （li-S） batteries are widely deemed to be one of the most potential candidates for future secondary batteries because of their remarkable energy ***,notorious polysulfide shuttling and retarded sulfur reaction kinetics pose significant obstacles to the further application of li-S *** rationally designed highly active electrocatalysts can facilitate polysulfide conversion,the universal and scalable synthesis strategies need to be ***,a universal synthetic strategy to construct a series of three-dimensional （3D） porous graphene-iron （3DGr-Fe） based electrocatalysts involving 3DGr-FeP,3DGr-Fe3C,and 3DGr-Fe3Se4is exploited for manipulating the li-S redox *** has been observed that the implementation of a 3D porous Gr architecture leads to the well-designed conductive networks,while the uniformly dispersed iron nanoparticles introduce an abundance of active sites,fostering the lithium polysulfide conversion,thereby bolstering the overall electrochemical *** li-S battery with the 3DGr-Fe based electrocatalyst exhibits remarkable capacity retention of 94.8%upon 100 times at 0.2 ***,the soft-packaged li-S pouch cell based on such a 3DGr-Fe electrocatalyst delivers superior capacity of 1060.71 mA h g-1and guarantees for the continuous 30 min work of fan *** investigation gives comprehensive insights into the design,synthesis,and mechanism of 3DGr-Fe based electrocatalysts with high activity toward efficient and durable li-S batteries.

关键词： Redox reactions

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Novel(CoFe2NiV0.5Mo0.2)100-xNbx Eutectic High-Entropy Alloys with Excellent Combination of Mechanical and Corrosion Properties

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Acta Metallurgica Sinica(English Letters) 2020年第8期33卷 1046-1056页

作者： Ren li Jing Ren Guo-Jia zhang Jun-yang He Yi-ping lu Tong-min Wang Ting-Ju li Key Laboratory of Solidifi cation Control and Digital Preparation Technology(liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Max-Planck-Institut für Eisenforschung GmbH 40237 DusseldorfGermany

The emergence of eutectic high-entropy alloys(EHEAs)offers new insights into the design of next generation structural alloys,which is due to their stable dual-phase microstructure and outstanding mechanical properties from room to elevated *** this work,a series of(CoFe2 NiV0.5Mo0.2)100-xNbx(0≤x≤12)EHEAs were designed and prepared via vacuum *** eutectic microstructure composing lamellar face-centered cubic solid solution phase and C14 Laves phase appears in the as-cast EHEA when x=*** microstructure turns to hypoeutectic or hypereutectic when x is below or beyond that critical value *** volume fraction of the hard Laves phase is proportional to the Nb addition,leading to the strength increment yet at the expense of ductility at room *** particular,the EHEA having4 at%Nb shows a compressive strength of 2.1 GPa with an elongation to fracture of 45%,while EHEAs containing 9 and10 at%Nb exhibit ultrahigh yield strengths of over 1.4 *** effect of Nb addition on the corrosion resistance of this Crfree EHEA system was also *** EHEA containing 9 at%Nb has the best anti-corrosion performance in the 3.5 wt%NaCl solution at 298±1 K,indicating a good combination of mechanical and corrosion properties.

关键词： Eutectic high entropy alloys Laves phase Microstructure Mechanical properties Corrosion property

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POLY(THIOPHENE-3-ACETIC ACID)-PALLADIUM NANOPARTICLE COMPOSITE MODIFIED ELECTRODES FOR SUPERSENSITIVE DETERminATION OF HYDRAZINE

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Chinese Journal of Polymer Science 2013年第3期31卷 419-426页

作者： Ou zhang Hong-mei Yu li-min lu yang-ping Wen 段学民徐景坤 School of Chemical Engineering University of Science and Technology Liaoning School of Pharmacy Jiangxi Science & Technology Normal University

A promising electrochemical sensor was fabricated by electrodeposition of Pd nanoparticles （PdNPs） on poly（thiophene-3-acetic acid）（PTAA）-modified glassy carbon electrode （GCE）, forming a PdNPs/PTAA composites-modified GCE （PdNPs/PTAA/GCE）. Scanning electron microscope （SEM） and electrochemical techniques were used for the characterization of these composites. It was found that the PdNPs/PTAA layer was very uniform. ]Electrochemical experiments showed that this proposed PdNPs/PTAA composites-modified electrode exhibited excellent electrocatalytic activity towards the oxidation of hydrazine. Under the optimum conditions, the proposed sensor can be applied to the quantification of hydrazine with a wide linear range from 8.0 × 10-9 mol/L to 1.0 × 10-5 mol/L with a low detection limit of 2.67 × 10-9 mol/L. The experiment results also showed that the sensor exhibited good reproducibility and long-term stability, as well as high selectivity with no interference from other potential competing species.

关键词： Sensor Hydrazine Nanocomposites Pd nanoparticles Conducting polymer.

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Experimental study on mechanical properties of methane-hydrate-bearing sediments

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Acta Mechanica Sinica 2012年第5期28卷 1356-1366页

作者： Xu-Hui zhang Xiao-Bing lu li-min zhang Shu-Yun Wang Qing-ping li Laboratory for Hydrodynamics and Ocean Enginnering Institute of MechanicsChinese Academy of Sciences Department of Civil and Environmental Engineering Hong KongUniversity of Science and Technology Research Centre China Ocean Oil Co.

Mechanical properties of methane hydrate- bearing-sediments （MHBS） are basic parameters for safety analysis of hydrate exploration and exploitation. Young＇s modulus, cohesion, and internal friction angle of hydrate- bearing sediments synthesized in laboratory, are investigated using tri-axial tests. Stress-strain curves and strength parameters are obtained and discussed for different compositions and different hydrate saturation, followed by empirical expressions related to the cohesion, internal friction angle, and modulus of MHBS. Almost all tested MHBS samples exhibit plastic failure. With the increase of total saturation of ice and methane hydrate （MH）, the specimens＇ internal friction angle decreases while the cohesion increases.

关键词： Gas hydrate sediment. Tri-axial test. Cohesion Internal friction angle Elastic modulus

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Electronic Noses Using Quantitative Artificial Neural Network

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Chemical Research in Chinese Universities 2001年第4期17卷 380-386页

作者： WEN li-jing BIAN li-ping lu Yu zhang Mei-zhuo YU li-ping yang Peng-yuan Department of Chemistry Fudan UniversityShanghai 200433P.R.China

The present paper covers a new type of electronic nose (e-nose) with a four-sensor array, which has been applied to detecting gases quantitatively in the presence of interference. This e-nose has adapted fundamental aspects of relative error (RE) in changing quantitative analysis into the artificial neural network (ANN). Thus, both the quantitative and the qualitative requirements for ANN in implementing e-nose can be satisfied. In addition, the e-nose uses only 4 sensors in the sensor array, and can be designed for different usages simply by changing one or two sensor(s). Various gases were tested by this kind of e-nose, including alcohol vapor, CO, iiquefied-petrol-gas and CO2. Satisfactory quantitative results were obtained and no qualitative mistake in prediction was observed for the samples being mixed with interference gases.

关键词： E-nose ANN Relative error Quantitative analysis

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Coordinated control of carbon and oxygen for ultra-low-carbon interstitial-free steel in a smelting process

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International Journal of minerals,Metallurgy and Materials 2015年第12期22卷 1252-1259页

作者： min Wang Yan-ping Bao Quan yang li-hua Zhao lu lin State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing National Engineering Research Center of Flat Rolling Equipment University of Science and Technology Beijing

Low residual-free-oxygen before fmal de-oxidation was beneficial to improving the cleanness of ultra-low-carbon steel. For ultra-low-carbon steel production, the coordinated control of carbon and oxygen is a precondition for achieving low residual oxygen during the Ruhrstahl Heraeus （RH） decarburization process. In this work, we studied the coordinated control of carbon and oxygen for ultra-low-carbon steel during the basic oxygen furnace （BOF） endpoint and RH process using data statistics, multiple linear regressions, and thermodynamics computations. The results showed that the aluminum yield decreased linearly with increasing residual oxygen in liquid steel. When the mass ratio of free oxygen and carbon （[O]/[C]） in liquid steel before RH decarburization was maintained between 1.5 and 2.0 and the carbon range was from 0.030wt% to 0.040wt%, the residual oxygen after RH natural decarburization was low and easily controlled. To satisfy the requirement for RH decarburization, the carbon and free oxygen at the BOF endpoint should be controlled to be between 297 × 10^6 and 400 × 10^-6 and between 574 × 10^-6 and 775 × 10^-6, respectively, with a temperature of 1695 to 1715℃ and a furnace campaign of 1000 to 5000 heats.

关键词： low carbon steel smelting decarburization cleanness

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Enhanced performance triboelectric nanogenerator based on porous structure C/MnO_(2)nanocomposite for energy harvesting

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Nano Research 2022年第8期15卷 7163-7171页

作者： Honghao zhang ping zhang Pengfei li lu Deng Weikang zhang Baocheng liu Zhengchun yang School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China School of Integrated Circuit Science and Engineering Adv.Mater.and Printed Electronics CenterTianjin Key Laboratory of Film Electronic&Communication DevicesTianjin University of TechnologyTianjin 300384China

Triboelectric nanogenerator(TENG)can realize a variety of mechanical energy collections in the environment,which has great potential in the field of wearable ***,many TENGs could rarely be satisfactory to wearable electronics promotion because of their expensive raw materials and complex manufacturing *** this study,a type of porous structure carbon powder/manganese dioxide(C/MnO_(2))nanocomposite is *** material adopts low-cost,high-yield carbon powder,can be prepared in one step through a simple,economical,and environmentally friendly hydrothermal preparation process,and has high economic *** power generation performance was obtained by modulating the charge trapping ability and storage capacity of polydimethylsiloxane@C/MnO_(2)(PDMS@C/MnO_(2))film based on variations in the weight-loading of C/MnO_(2).The maximum output voltage of carbon powder/manganese dioxide TENG(CM-TENG)is 63 V,which is 2.1 times that of PDMS-TENG and 1.86 times that of carbon powder TENG(C-TENG)and can easily light up 53 ***,CM-TENG can convert biological motion energy into electrical signals to detect human hand *** CM-TENG self-powered system can successfully drive various microelectronic devices,such as electronic watches,liquid crystal displays(LCDs),and *** study provides a reliable,low-cost,high-performance,and widely applicable electronic system that shows great potential in future fields such as wearable devices and micro-sensing systems.

关键词： porous structure carbon powder/manganese dioxide(C/MnO_(2)) nanocomposite triboelectric nanogenerator widely applicable microelectronic devices

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Inversion analysis of the shear strength parameters for a high loess slope in the limit state

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Journal of Mountain Science 2021年第1期18卷 252-264页

作者： liN Xiao-yan zhang lin-fan yang Ze li ping li Tong-lu School of Earth Sciences and Engineering Xi'an Shiyou UniversityXi'an 710065China Shaanxi Key Laboratory of Petroleum Accumulation Geology Xi'an Shiyou UniversityXi'an 710065China School of Geological Engineering and Surveying Chang'an UniversityXi'an 710061China

It is difficult to obtain reliable shear strength parameters for the stability analysis and evaluation of high loess ***,this paper determines slope elements and physical parameter of 79 slopes with heights of[40,120]m based on the measured loess slopes in the Ganquan and Tonghuang subregions of northern Shaanxi Province,*** the limit state of the loess slope(stability factor Fs is 1.0),a fitting equation for the slope height and width is ***,the model is developed by stability analysis software-SLOPE/W,and the comprehensive shear strength parameters corresponding to different slope heights of the high slope in the study area are obtained by inversion using the Morgenstern-Price *** results show that when the height of the slope increases,the cohesion c increases in the soil,and the internal friction angle j *** change is consistent with the characteristics reflected in the composition and physical properties of the slopes,and the comprehensive strength parametric curves are very similar between the Ganquan subregion and the Tonghuang subregion.A landslide that occurred in Miaodian-zaitou of Jingyang County,Shaanxi Province,is selected to verify this inversion method,and the results show that the calculated shear strength parameters of the inversion are consistent with the measured value of the actual slope.

关键词： Loess High slope Shear strength Inversion SLOPE/W

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Identification of the nitrogen-fixing Pseudomonas stutzeri major flagellar gene regulator FleQ and its role in biofilm formation and root colonization

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Journal of Integrative Agriculture 2016年第2期15卷 339-348页

作者： MA Yao zhang Qiu-lei yang Zhi-min li Yun YAN Yong-liang ping Shu-zhen zhang li-wen liN min lu Wei College of Biological Sciences China Agricultural University Biotechnology Research Institute Chinese Academy of Agricultural Sciences The Key Laboratory of Plant Pathology of Hubei Province/College of Plant Science and Technology Huazhong Agricultural University

Flagellar biosynthesis and motility are subject to a four-tiered transcriptional regulatory circuit in Pseudomonas,and the master regulator FleQ appears to be the highest-level regulator in this hierarchical regulatory *** stutzeri A1501 is motile by a polar flagellum;however,the motility and regulatory mechanisms involved in this process are ***,we searched the A1501 genome for flagella and motility genes and found that approximately 50 genes,which were distributed in three non-contiguous chromosomal regions,contribute to the formation,regulation and function of the *** non-polar mutation of fleQ impaired flagellar biosynthesis,motility and root colonization but enhanced biofilm *** positively regulates the expression of flagellar class Ⅱ-Ⅳ genes,suggesting a regulatory cascade that is coordinated similar to that of the well-known *** on our results,we propose that flagellar genes in *** A1501 are regulated in a cascade regulated by FleQ and that flagellum-driven motility properties may be necessary for competitive rhizosphere colonization.

关键词： FleQ Pseudomonas stutzeri flagellar biosynthesis biofilm formation root colonization

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