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Effect of Organic Matter Type and Maturity on Organic Matter Pore Formation of Transitional Facies Shales: A Case Study on Upper Permian Longtan and Dalong Shales in Middle Yangtze Region, China

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Journal of Earth Science 2020年第2期31卷 368-384页

作者： Zhongrui wu sheng He Yuanjia Han Gangyi Zhai Xipeng He zhi Zhou Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China Oil&Gas Survey Center China Geological SurveyBeijing 100029China Research Institute of Exploration and Development of East China Branch of SINOPEC Nanjing 210011China

Organic matter(OM)nanopores developed in transitional facies shales,i.e.,the Upper Permian Longtan and Dalong Formations in the Yangtze Platform,China,were investigated to determine the corre-sponding influence of thermal maturity and OM types within the geological conditions.A suite of 16 core samples were taken from Type-Ⅲ Longtan shales and Type-Ⅱ Dalong shales from two wells covering a ma-turity(Ro,vitrinite reflectance)ranging from 1.22%to 1.43%and 2.62%to 2.97%,*** analysis of the shale samples was carried out,including field-emission scanning electron microscopy(FESEM),low-pressure N2 and CO2 adsorption,high-pressure CH4 adsorption,and mercury intrusion capillary pressure(MICP)*** fluid inclusions of liquid and gas hydrocarbons trapped in calcite vein samples in Dalong shales of two wells were studied using laser Raman and fluorescence ***-SEM images indicated that OM pores in different formations varied substantially in terms of shape,size,and distribution *** pores in Type-Ⅱ Dalong shales of Well XY1 were mainly micropore,sparsely distributed in the gas-prone kerogen with a spot-like and irregular shape,while bitumen rarely developed observable *** contrast,the morphology of OM pores in Type-Ⅲ Longtan shales were significantly different,which was due to differences in the OM *** primary OM pores in some terrestrial woody debris in Longtan shales had a relatively larger pore diameter,ranging from hundreds of nanometers to a few micrometers and were al-most all rounded in shape,which might be one of the factors contributing to larger pore volume and gas adsorption capacity than Dalong shales of Well *** Dalong shales of Well XY1 with relatively lower thermal maturity,there were abundant spongy-like pores,densely developed in the pyrobitumen in Type-Ⅱ Dalong shales of Well EY1,with an irregular shape and diameter ranging from several to hundreds of *** blue fluorescent oil inclusio

关键词： Middle Yangtze area Permian transitional facies shales pore structure thermal maturity organic matter type organic matter pore petroleum geology

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In situ synthesis of polycrystalline cubic boron nitride in cBN-Al-Ti system with different Gd_(2)O_(3) additions

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Rare Metals 2021年第5期40卷 1267-1274页

作者： sheng-Lin Zhong zhi-Kai Li Chao Chen Chuan Chen Peng Wang Yi wu College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004China

Polycrystalline cubic boron nitride was sintered under high temperature(1400℃)and high pressure(5.5 GPa)using an in situ synthesis *** composition,microstructure,relative density and mechanical properties of the polycrystalline cubic boron nitride(PcBN)with different contents of Gd_(2)O_(3) were studied by means of X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy-dispersive spectroscopy(EDS).The results show that the phases of TiB_(2),TiN,AIN,AlTi_(2)N and GdB_(6) are formed through in situ synthesis of cBN-Al-Ti-Gd_(2)O_(3) *** the Gd_(2)O_(3) content increasing,the relative density increases and mechanical properties of PcBN begin to increase and then *** amount of Gd_(2)O_(3) can advance the formation of TiB_(2) and improve the aspect ratio of TiB_(2).When Gd_(2)O_(3) content is 1.0 wt%,the PcBN exhibits optimal comprehensive mechanical properties,with a microhardness of 33.35 GPa and a flexural strength of 972.37 MPa.

关键词： Polycrystalline cubic boron nitride(PcBN) TiB_(2) Rod crystal Rare earth oxides Mechanical properties

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Mainchain Semifluorinated Polymers with Ultra High Molecular Weight via Reaction-enhanced Reactivity of Intermediate(RERI) Mechanism

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Chinese Journal of Polymer Science 2023年第5期41卷 760-767,I0009页

作者： Jia-sheng wu Wang-Meng Hou zhi-Jia Liu Yi Shi Yong-Ming Chen School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSun Yat-Sen UniversityGuangzhou 510006China

Achieving the linear polymers with high molecular weight via step-growth polymerization of A2 and B2 monomers is significantly limited by the requirement of strict stoichiometry of two monomers when the reactivity of A and B groups are not changed during the ***,a unique step-growth polymerization based on copper-catalyzed azide-alkyne cycloaddition(CuAAC)with reactionenhanced reactivity of intermediate(RERI)mechanism was developed for the preparation of mainchain semifluorinated polymers with high molecular *** CuAAC polymerization of bis-alkynyl-terminated fluorinated monomers(A2)and 2,2-bis(azidomethyl)propane-1,3-diyl bis(2-methylpropanoate)(BiAz,B2)with RERI effect at different stoichiometric ratio was systematically *** results indicated that the semifluorinated polymers with ultrahigh molecular weight,Mw,MALLS>106 g/mol,could be efficiently synthesized by using excess molar of BiAz *** resultant high-molecular-weight semifluorinated polymers show good thermostability and high *** addition,the glass transition temperature(Tg)of these mainchain semifluorinated polymers could be tuned conveniently due to the bis-alkynyl-terminated comonomers could be consumed completely when excessive BiAz monomers were used in this this step-growth polymerization.

关键词： Semifluorinated polymers Click polymerization Step-growth polymerization

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CO_(2) conversion and decarburization kinetics of CO_(2) gas and liquid Fe-C alloy at 1873 K

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Journal of Iron and Steel Research International 2022年第3期29卷 425-433页

作者： Wen-he wu Rong Zhu zhi-zheng Li Chun-yang Wang Guang-sheng Wei School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Research Center of Carbon Dioxide Science University of Science and Technology BeijingBeijing100083China

The reactions between CO_(2) gas and liquid Fe-C alloy with different initial carbon concentrations at 1873 K were investigated using experimental results,thermodynamic equilibrium,and kinetic *** average CO_(2) conversion is greater than 80%when the carbon content ranges from 4.0 to 1.0 wt.%.When the carbon content decreases from 0.5 to 0.1 wt.%,the average CO_(2) conversion diminishes from 83.50%to 40.84%.This proves that CO_(2) gas and liquid Fe-C alloy reaction does not reach equilibrium under experimental conditions compared with the calculated thermodynamic *** the kinetic analysis,it is shown that in the medium-to high-carbon liquid Fe-C alloys,the rate-controlling step involves CO_(2) gas mass transfer or mixed rate-controlling of CO_(2) gas mass transfer with adsorption and dissociation of CO_(2) *** contrast,in the low-carbon liquid Fe-C alloy,carbon mass transfer occurs in the molten *** critical carbon content of the rate-controlling step transformation is 0.7937 wt.%.

关键词： CO_(2)utilization CO_(2)conversion Decarburization kinetics Fe-C alloy Rate-controlling step

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Atomic Coherence in the Micromaser Injected with Slow V-type Three-State Atoms: Emission Probability

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Chinese Physics Letters 2001年第2期18卷 223-224页

作者： ZHANG zhi-Ming LIANG Wen-Qing XIE sheng-wu Department of Applied Physics Shanghai Jiao Tong UniversityShanghai 200030

The effects of atomic coherence on the single-mode two-photon micromaser injected with slow V-type three-state atoms are studied for the first *** is shown that the atomic coherence can modify the atomic emission *** ... 详细信息

关键词： probability Probability atomic

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Retrogression characteristics of a novel Al-Cu-Li-X alloy

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International Journal of Minerals,Metallurgy and Materials 2010年第5期17卷 624-628页

作者： zhi-shan Yuan Zheng Lu Xiu-liang wu You-hua Xie sheng-long Dai Chang-sheng Liu Grikin Advanced Materials Co. Ltd. General Research Institute for Non-Ferrous Metals Beijing 100088 China Beijing Institute of Aeronautical Materials Beijing 100095 China School of Materials ＆ Metallurgy Northeastern University Shenyang 110004 China

Retrogression characteristics of a novel Al-Cu-Li-X alloy of 2A97 were studied by hardness testing, transmission electron microscopy （TEM）, and differential scanning calorimetry （DSC）. The retrogression treatments of aging at 155°C for 12 h followed by aging at 220 and 240°C were chosen by determining the peak temperature of δ＇ precipitation at 230°C by DSC. The retrogression treatment at a lower temperature of 220°C causes the precipitation and coarsening of δ＇ and θ＇ phases in the matrix, resulting in an increase in hardness. Retrogression at a higher temperature of 240°C causes the dissolution and coarsening of δ＇ and θ＇ precipitates in the matrix and on the grain boundaries, resulting in a decrease in hardness. Microstructural changes upon retrogression including the appearance of equilibrium precipitates such as T1, T2, δ＇, and θ are confirmed by the selected area electron diffraction and the bright and dark field image analysis.

关键词： retrogression artificial aging aluminum-lithium alloy microstructure

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Experimental Investigation of fluid-structure interaction of composite hydrofoils in cavitating flow

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Journal of Hydrodynamics 2022年第2期34卷 207-213页

作者： Hou-sheng Zhang zhi-pu Guo Qin wu Han-zhe Zhang Guo-yu Wang School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China Aviation Engineering School Air Force Engineering UniversityXian710038China

This paper experimentally studies the cavitating fluid-structure interaction of composite hydrofoils with different ply *** synchronous measurement system with high-speed camera and for laser Doppler vibrometer(LDV),the feedback pressure regulation system,and the flow rate control system are *** experimental results of the cavitation evolution show that,compared with the rigid hydrofoil,the composite hydrofoils with+45°ply angle and 0°ply angle accelerate the cavitation inception,and the composite hydrofoil with−45°ply angle delays the cavitation *** the same cavitation number,the cloud cavitation of the+45°laminated hydrofoil is the most severe,followed by that of the 0°laminated hydrofoil,and that of the−45°laminated hydrofoil is relatively weak and close to that of the rigid *** analyses of the structural vibration of the composite hydrofoils in different cavitation stages show that the three composite hydrofoils have no significant vibration at the incipient cavitation and the supercavitation,but relatively significant vibration is observed in the sheet and cloud *** vibration amplitude of the composite hydrofoil with+45°ply angle is the largest,followed by those of the−45°,0°laminated *** the sheet cavitation,the dominant frequencies of the structural vibration velocity of the+45°laminated hydrofoil and the−45°laminated hydrofoil are the first and second modal frequencies,but no explicit dominant frequency is observed for the 0°laminated *** the cloud cavitation,the dominant frequencies of the three composite hydrofoils mainly include the first modal frequency,the second modal frequency,and the cavity shedding frequency.

关键词： Cavitation fluid-structure interaction composite hydrofoil cavity induced vibration

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The flame retardancy of alginate/flame retardant viscose fibers investigated by vertical burning test and cone calorimeter

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Chinese Chemical Letters 2018年第3期29卷 489-492页

作者： Xian-sheng Zhang Yan-zhi Xia Mei-wu Shi Xiong Yan Key Laboratory of Textile Science & Technology Ministry of Education College of Textiles Donghua University Shanghai 201620 China Laboratory of Fiber Materials and Modern Textile The Growing Base for State Key Laboratory Qingdao University Qingdao 266071 China The Quartermaster Equipment Research Institute of Logistical Support Department Beijing 100082 China

In this research, the flame retardancy of neat alginate fiber, flame retardant viscose fiber （FRV） and alginate/FRV （50/50） blending fibers were investigated by vertical burning and cone calorimeter tests. The vertical burning test showed that the afterflame time of alginate fiber was 0 s, but alginate presented serious smoldering behavior with the afterglow time of 605 s and damaged length of 85 mm, while the afterglow time of FRV was 0 s. When the FRV was incorporated into alginate with the weight ratio of 50/ 50, the afterglow time and damaged length were significantly reduced to 85 s and 35 mm, indicating the smoldering of alginate can be effectively decreased. The morphology and chemical structure of the alginate residual demonstrated that it was seriously destroyed during smoldering process, which was ascribed to its relative low initial thermal degradation temperature. Based on the thermal properties analysis, alginate and FRV fibers shared the concurrence of rapid degradation in the same temperature region of 250-300 ℃, through which, the compact and stable char formed by FRV can prevent the heat transmission and suppress the smoldering of alginate. Further, the cone calorimeter results demonstrated that the time to ignition （TTI） significantly increased and peak heat release rate （PHRR） decreased for alginate/FRV （50/50） compared with FRV. With this research, a new method to overcome the smoldering of alginate was proposed by blending with FRV

关键词： Alginate fibers Flame retardant viscose fibers Blending Flame retardancy Vertical burning test Cone calorimeter

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Natural taurine promotes apoptosis of human hepatic stellate cells in proteomics analysis

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World Journal of Gastroenterology 2010年第15期16卷 1916-1923页

作者： Deng, Xin Liang, Jian Lin, zhi-Xiu wu, Fa-sheng Zhang, Ya-Ping Zhang, zhi-Wei Guangxi Tradit Chinese Med Univ Affiliated Ruikang Hosp Nanning 530011 Guangxi Zhuang Peoples R China Chinese Univ Hong Kong Sch Chinese Med Shatin Hong Kong Peoples R China

AIM:To study the differential expression of proteins between natural taurine treated hepatic stellate cells and controls, and investigate the underlying regulatory mechanism of natural taurine in inhibiting hepatic ***: A proteomic strategy combining two-dimensional gel electrophoresis and ultraperform ance liquid chromatographyelectrospray ionizationtandem mass spectrometry (UPLCESIMS/MS) was used to study the differential expression of proteins and Western blotting was used to validate the results. Gene ontology (GO) method was utilized to analyze the functional enrichment of differentially expressed proteins. Flow cytometry was performed to compare the apoptosis rate between taurinetreated and untreated hepatic stellate cells (HSCs).RESULTS: Nineteen differentially expressed proteins (11 upregulated and 8 downregulated) were identifiedby 2D/MS, and the expression profiles of GLO1 and ANXA1 were validated by Western blotting. GO analysis found that these differentially expressed proteins were enriched within biological processes such as "cellular apoptosis", "oxidation reaction" and "metabolic process" in clusters. Flow cytometric analysis showed that taurinetreated HSCs had a significantly increased apoptosis rate when compared with the control ***: Natural taurine can promote HSC apoptosis so as to inhibit hepatic fibrosis.

关键词： Natural taurine Proteomics Hepatic stellate cell Hepatic f ibrosis Apoptosis

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Separation and identification of moxifloxacin impurities in drug substance by high-performance liquid chromatography coupled with ultraviolet detection and Fourier transform ion cyclotron resonance mass spectrometry

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Chinese Chemical Letters 2012年第10期23卷 1185-1188页

作者： Cai sheng wu zhi Xin Jia Bao Ming Ning Jin Lan Zhang Song wu State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia Medica Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100050 China Institute of Materia Medica Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100050 China National Institutes for Food and Drug Control Beijing 100050 China

In this paper, a high-performance liquid chromatography coupled with ultraviolet detection and Fourier transform-ion cyclotron resonance mass spectrometry （HPLC-UV/FrICRMS） method was described for the investigation of impurity profile in moxifloxacin （MOX） drug substance and chemical reference substance. Ten impurities were detected by HPLC-UV, while eight impurities were identified by using the high accurate molecular mass combined with multiple-stage mass spectrometric data and fragmentation rules. In addition, to our knowledge, five impurities were founded for the first time in MOX drug substance.

关键词： Moxifloxacin (MOX) Impurity profile High-performance liquid chromatography coupled with ultraviolet detection and Fouriertransform-ion cyclotron resonance mass spectrometry (HPLC-UV/bTICRMS)

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