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Oxidative heat release intensity in coal at low temperatures measured by the hot-wire method

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Mining Science and Technology 2009年第3期19卷 326-330页

作者： YANG Yong-liang LI Zeng-hua PAN Shang-kun GAO si-yuan wang Ya-li School of Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Directly measuring the oxidative heat release intensity at low temperatures is difficult at *** developed a new method based on heat conduction theory that directly measures heat release intensity of loose coal at low *** this method, we calculated the oxidative heat release intensity of differently sized loose coals by comparing the temperature rise of the coal in nitrogen or an air *** results show that oxidation heat release intensity of Shenhua coal sized 0～15 mm is 0.001～0.03 W/m3 at 30～90 °C and increases with increasing *** heat release intensity at a given temperature is larger for smaller sized *** temperature effect on heat release intensity is muted as the coal size *** lower temperature the change in heat release intensity as a function of size becomes *** results show that the test system is usable for practical applications and is easy to operate and is capable of measuring mass samples.

关键词： coal spontaneous combustion oxidation heat release intensity of coal test system diameter

Review on application of phase change materials in asphalt pavement

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Journal of Traffic and Transportation Engineering(English Edition) 2023年第2期10卷 185-229页

作者： Xiaoqing wang Biao Ma siqi Li Wei si kun Wei Hongfei Zhang Xueyan Zhou Yunfeng Fang Xingxiang Kang Wenshuo Shi Key Laboratory for Special Area Highway Engineering of Ministry of Education Chang’an UniversityXi’an 710064China School of Modern Post Xi’an University of Posts&TelecommunicationsXi’an 710064China School of Transportation Southeast UniversityNanjing 211189China Dongtai Highway Development Center Dongtai 224200China

Phase change materials(PCMs)can regulate the temperature in asphalt pavement and minimize temperature-related problems,such as rutting and thermal cracking,because of their ability to store and release latent *** PCMs can also enable additional road surface functions,such as snow melting ability,freeze-thaw cycle resistance,and heat island *** functions are helpful in achieving intelligent,green,and sustainable transportation *** the research on PCMs for asphalt pavement has been carried out for more than 10 years,a systematic material system and mature application technology have not yet been *** main reasons for restricting the development of this technology include the lack of suitability between the PCMs and asphalt pavement,the quantitative characterization of phase change temperature regulation property,and the evaluation of the effect of phase change energy storage on improving pavement *** the published review has made a comprehensive summary of the existing research,it has yet to identify the key restricting the development of this technology and carry out a review and discussion based on *** grasp the development status of the application of PCMs in asphalt pavement,sort out the development needs and break through the technical barriers,this study systematically summarizes the preparation and performance of PCMs for asphalt pavement,compares the performance and evaluation methods of asphalt mixtures with different PCMs,and summarizes the numerical simulation methods of phase change asphalt ***,this study presents potential approaches to address critical technical issues and discusses possible future research.

关键词： Asphalt mixture Phase change material Road performance Thermal performance Thermoregulation

Refractive Index Engineering as a Novel Strategy toward Highly Transparent and Tough Sustainable Polymer Blends

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Chinese Journal of Polymer Science 2020年第12期38卷 1335-1344页

作者： si-Ting Sun Hang wang Dong Huang Ying-Li Ding Yang Zhang Dong-Po Song kun-Yu Zhang Li Pan Yue-Sheng Li Department of Polymer Science and Engineering School ofChemical Engineering and TechnologyTianjin UniversityTianin 300350China Department of Chemical Engineering Xiamen UniversityXiamen 361005China Tianjin Key Laboratory ofComposite and Functional Materials School ofMaterials Science and EngineeringTianjin UniversityTlanin 300350 China Cllaborotive lovation Center ofChemical Science and Engineering(injin) Tianjin 300072 China

High transparency and toughness are prerequisites for sustainable polymers if they are to find wide application as alternatives to petroleum-based ***,the utility of sustainable polymers such as commercially available polylactide(PLA)is limited by their inherent brittleness and high ***,toughening PLA-based materials via cost-effective blending strategies without sacrificing transparency remains a ***,we report a novel strategy involving active refractive index matching for creation of highly transparent and tough PLA ***,we engineered the refractive index of a promising renewable poly(epichlorohydrin-co-ethylene oxide)elastomer by introducing polar ionic moieties via a simple chemical method,and we blended the resulting ionomers with *** best blend showed an impact strength of>80 kJ/m2,an elongation at break of 400%,and high transparency(90%).These characteristics are of great importance for potential applications such as *** strategy offers a versatile new way to prepare high-performance sustainable polymer materials with excellent transparency.

关键词： Polylactide Blending strategies Refraaive index matching Poly(epichlorohydrin-co-ethylene oxide) Ionomers

Cloning, Prokaryotic Expression, and Antigenicity Analysis of NS1 Gene of H9N2 Swine Influenza Virus

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Agricultural Sciences in China 2008年第7期7卷 895-900页

作者： wang Fang-kun YUAN Xiu-fang wang Yi-cheng ZHANG Cun XU Li-huan LIU si-dang College of Animal Sciences and Veterinary Medicine Shandong Agricultural University Tai＇an 271018 P.R.China Insititute of Animal Sciences and Veterinary Medicine Zhejiang Academy of Agricultural Sciences Hangzhou 310021 P.R.China

To obtain the NS1 gene of swine influenza virus H9N2 subtype expressed efficiently in E. coli, to develope the effective diagnostic methods for swine influenza virus H9N2 subtype, the NS 1 gene of swine influenza virus H9N2 subtype was amplified by reverse transcriptase polymerase chain reaction （RT-PCR） and cloned into a prokaryotic expression vector, pET-28a（＋）, and overexpressed in E. coli BL21-DE3 after induction with 5 mmol L-1 lactose. The recombinant protein was purified by Ni-NTA and identified by western-blotting. An indirect enzyme-linked immunosorbent assay （ELISA） was used to analyze the antigenicity of the recombinant protein. The recombinant protein of NS1 was about 26 kD. The Western-blotting test showed that the recombinant protein reacted specifically with positive sera. The results of the ELISA test showed that the recombinant protein had good antigenicity.

关键词： swine influenza virus NS1 antigenicity

华北克拉通辽宁兴城玄武岩脉LA-ICP-MS U-Pb年龄及其地质意义

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地质与资源 2024年第3期33卷 291-299,279页

作者：么丝嘉王宏伟耿建珍黄雅琪何登洋邱昆峰中国地质大学地球科学与资源学院北京100083 中国地质调查局天津地质调查中心天津300170

华北克拉通中生代期间受古太平洋板块俯冲作用的影响,岩石圈发生大规模的减薄,导致其物理化学性质明显改变.揭示克拉通减薄的机制并约束克拉通破坏时限是地学界的重大科学问题.华北克拉通广泛发育中生代玄武岩,玄武岩作为岩浆作用的产物... 详细信息

华北克拉通中生代期间受古太平洋板块俯冲作用的影响,岩石圈发生大规模的减薄,导致其物理化学性质明显改变.揭示克拉通减薄的机制并约束克拉通破坏时限是地学界的重大科学问题.华北克拉通广泛发育中生代玄武岩,玄武岩作为岩浆作用的产物,所蕴含的年代学信息可以为岩石圈演化过程提供重要的时间约束.辽宁兴城地区位于华北克拉通的北缘,其内发育的太古宙—中新生代岩浆岩是研究华北克拉通破坏的理想对象.尽管前人对这些玄武岩做了大量的研究,但是对其结束时间仍然存在争论.本文选取兴城地区出露的玄武岩脉为研究对象,采用LA-ICP-MS锆石U-Pb年代学和金红石U-Pb年代学方法,探讨成岩年代学及其地质意义.锆石U-Pb定年结果表明,辽宁兴城玄武岩脉年龄为104.8±6.5Ma,而华北克拉通中生代岩石圈减薄的结束年龄也可推到105Ma左右.此年代学信息为早白垩世晚期华北克拉通大规模岩石圈减薄过程的时限提供了约束.

关键词：华北克拉通中生代玄武岩脉锆石U-Pb年龄金红石U-Pb年代学

Dynamic Recrystallization Behavior of Bimodal size siCpReinforced Mg Matrix Composite during Hot Deformation

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Acta Metallurgica sinica(English Letters) 2016年第6期29卷 527-537页

作者： Cui-Ju wang kun-kun Deng Shan-Shan Zhou Wei Liang Shanxi Key Laboratory of Advanced Magnesium-based Materials College of Materials Science and EngineeringTaiyuan University of Technology

The（submicron＋micron） bimodal size si Cp-reinforced Mg matrix composite was compressed at the temperature of 270–420 °C and strain rate of 0.001–1 s^-1. Then, dynamic recrystallization（DRX） behavior of the composite was investigated by thermodynamic method and verified by microstructure analysis. Results illustrated that the composite possess the lower critical strain and higher DRX ratio as compared to monolithic Mg alloys during hot deformation process. The predicted DRX ratio increased with the proceeding of compression, which was well consistent with the experimental value. Results from thermodynamic calculation suggested that the occurrence of DRX could be promoted by si Cp, which would be further proved by microstructure analysis. Formation of particle deformation zone around micron si Cp played a significant role in promoting DRX nucleation. Nevertheless, the distribution of submicron si Cp was increasingly uniform with the proceeding of compression, which could fully restrain grain growth. Therefore, the corporate effects of micron and submicron si Cp on DRX contributed to the improvement of DRXed ratio and the refinement of grain size for the composite during compression process.

关键词： Magnesium matrix composite Deformation Dynamic recrystallization Microstructure Thermodynamic analysis

Nanocellulose-Assisted Construction of Multifunctional MXene-Based Aerogels with Engineering Biomimetic Texture for Pressure Sensor and Compressible Electrode

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Nano-Micro Letters 2023年第7期15卷 122-135页

作者： Ting Xu Qun Song kun Liu Huayu Liu Junjie Pan Wei Liu Lin Dai Meng Zhang Yaxuan wang Chuanling si Haishun Du Kai Zhang State Key Laboratory of Biobased Fiber Manufacturing Technology Tianjin Key Laboratory of Pulp and PaperTianjin University of Science and TechnologyTianjin 300457People’s Republic of China Sustainable Materials and Chemistry Department of Wood Technology and Wood-Based CompositesUniversity of Göttingen37077 GöttingenGermany Department of Chemical Engineering Auburn UniversityAuburnAL 36849USA State Key Laboratory of Bio-Based Materials and Green Papermaking Qilu University of Technology(Shandong Academy of Sciences)3501 Daxue RoadJinan 250353People’s Republic of China

Multifunctional architecture with intriguing structural design is highly desired for realizing the promising performances in wearable sensors and flexible energy storage *** nanofiber(CNF)is employed for assisting in building conductive,hyperelastic,and ultralight Ti_(3)C_(2)T_(x)MXene hybrid aerogels with oriented tracheid-like *** biomimetic hybrid aerogels are constructed by a facile bidirectional freezing strategy with CNF,carbon nanotube(CNT),and MXene based on synergistic electrostatic interaction and hydrogen *** CNF and CNT“mortars”bonded with MXene“bricks”of the tracheid structure produce good interfacial binding,and superior mechanical strength(up to 80%compressibility and extraordinary fatigue resistance of 1000 cycles at 50%strain).Benefiting from the biomimetic texture,CNF/CNT/MXene aerogel shows ultralow density of 7.48 mg cm^(-3)and excellent electrical conductivity(~2400 S m^(-1)).Used as pressure sensors,such aerogels exhibit appealing sensitivity performance with the linear sensitivity up to 817.3 kPa^(-1),which affords their application in monitoring body surface information and detecting human ***,the aerogels can also act as electrode materials of compressive solid-state supercapacitors that reveal satisfactory electrochemical performance(849.2 mF cm^(-2)at 0.8 mA cm^(-2))and superior long cycle compression performance(88%after 10,000 cycles at a compressive strain of 30%).

关键词： Nanocellulose Aerogels MXene Supercapacitors Pressure sensors

不同母核结构苦豆碱衍生物合成及其抗冠状病毒活性研究

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药学学报 2024年第2期59卷 404-412页

作者：孟润泽公玥施宇龙王坤彭宗根宋丹青中国医学科学院北京协和医学院医药生物技术研究所北京100050

本研究设计合成了不同母核结构的12个全新苦豆碱衍生物,其中十元大环骨架苦豆碱衍生物3通过季铵盐γ-H的霍夫曼消除后扩环获得,结构经X-单晶确证。进而采用CCK-8法评价了目标物对抗人类β-冠状病毒HCoV-OC43的活性。结果显示,季铵盐苦豆... 详细信息

本研究设计合成了不同母核结构的12个全新苦豆碱衍生物,其中十元大环骨架苦豆碱衍生物3通过季铵盐γ-H的霍夫曼消除后扩环获得,结构经X-单晶确证。进而采用CCK-8法评价了目标物对抗人类β-冠状病毒HCoV-OC43的活性。结果显示,季铵盐苦豆碱2a与化合物3均具有良好活性,2a表现出最好抗病毒活性,EC50值为3.77μmol·L-1,si值大于53.1。Schr?dinger分子对接结果显示,化合物2a与3均可能通过直接靶向宿主TMPRSS2和SR-B1发挥抗冠状病毒作用。研究结果拓展了桥环骨架苦豆碱的结构类型及其抗冠状病毒用途,为发展一类新型抗冠状病毒化合物提供了有益科学数据。

关键词：季铵盐苦豆碱新型冠状病毒十元环苦豆碱 TMPRSS2 SR-B1

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电渗技术中水头压力与电压相互关系试验研究

煤炭科技 2024年第2期45卷 45-49页

作者：司湘王档良刘锞锐杨道坤焦健睿中国矿业大学资源与地球科学学院江苏徐州221116

电渗透防水技术是一种新型的防水技术,具有维修成本低、应用范围广等特点。利用电渗法,通过室内试验测定了不同电压、电势梯度下4种不同土样的排水速率、电极电势降、有效电势及其利用率,分析了水头压力与电压对电渗的影响。研究结果表... 详细信息

电渗透防水技术是一种新型的防水技术,具有维修成本低、应用范围广等特点。利用电渗法,通过室内试验测定了不同电压、电势梯度下4种不同土样的排水速率、电极电势降、有效电势及其利用率,分析了水头压力与电压对电渗的影响。研究结果表明:电压越大,电极电势降越大,有效电势、有效电势利用率减小,有效电势利用率衰减越快;在同一水力梯度下,随着水力渗透系数增大,电渗排水速率也在逐渐增大;且当电势梯度与水力梯度的比值接近k值(水力渗透系数与电渗透系数的比值)时,电渗防水成功。研究可为电渗法的工程应用提供指导。

关键词：电渗技术水头压力电压电势梯度排水速率