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Grain growth behavior of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy during isothermal β heat treatments

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Rare Metals 2019年第3期38卷 233-237页

作者： De-Lai Ouyang Hai-Ming Du xia cui Shi-Qiang lu xian-Juan Dong School of Materials Science and Engineering Nanchang Hangkong University Department of Environmental Art Design Jiangxi Normal University School of Aeronautical Manufacturing Engineering Nanchang Hangkong University

Isothermal β heat treatments of Ti-6.5 Al-3.5 Mo-1.5 Zr-0.3 Si alloy were performed at the temperature of1040-1240 ℃ to examine the influence of heating conditions on grain growth of the alloy. The results show that the grain size increases with heating temperature and holding time increasing. Rapid β grain growth of the alloy takes place at the temperature of over 1140 ℃. The grain growth kinetics for the alloy follows the classical isothermal grain growth *** growth time exponent(n) of 0.5651 and activation energy(Q) of 129.6 kJ mol-1 are determined. Finally, in order to determine the grain size under different heating conditions,the grain growth model of the alloy was established.

关键词： Isothermal heating Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy Grain growth Model

Comparative Analysis of JmjC Domain-containing Proteins Reveals the Potential Histone Demethylases in Arabidopsis and Rice

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Journal of Integrative Plant Biology 2008年第7期50卷 886-896页

作者： Falong lu Guanglin Li xia cui Chunyan Liu Xiu-Jie Wang xiaofeng Cao State Key Laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China Graduate University the Chinese Academy of Sciences Beijing 100039 China

Histone methylation homeostasis is achieved by controlling the balance between methylation and demethylation to maintain chromatin function and developmental regulation. In animals, a conserved Jumonji C （JmjC） domain was found in a large group of histone demethylases. However, it is still unclear whether plants also contain the JmjC domain- containing active histone demethylases. Here we performed genome-wide screen and phylogenetic analysis of JmjC domain-containing proteins in the dicot plant, Arabidopsis, and monocot plant rice, and found 21 and 20 JmjC domain-containing, respectively. We also examined the expression of JmjC domain-containing proteins and compared them to human JmjC counterparts for potential enzymatic activity. The spatial expression patterns of the Arabidopsis JmjC domain-containing genes revealed that they are all actively transcribed genes. These active plant JmjC domain-containing genes could possibly function in epigenetic regulation to antagonize the activity of the large number of putative SET domain-containing histone methyltransferase activity to dynamically regulate histone methylation homeostasis.

关键词： At JMJ demethylase demethylation histone Jumonji C methylation Os JMJ.

1,3,5,5⁃四硝基六氢嘧啶与1,4,6,6⁃四硝基⁃1,4⁃二氮杂环庚烷的合成、晶体结构及性能

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含能材料 2024年第5期32卷 475-483页

作者：杜慧英屈智慧夏江璐杨雅麟李馨宇秦逸枫伍波马丛明西南科技大学环境友好能源材料国家重点实验室四川绵阳621010 西南科技大学生命科学与工程学院四川绵阳621010 南京工业大学安全科学与工程学院江苏南京211800

以2,2-二硝基-1,3-丙二醇为原料,分别与叔丁胺和乙二胺反应后再经硝化,合成了2种爆轰性能优异、热稳定性良好的氮杂脂肪环含能化合物:1,3,5,5-四硝基六氢嘧啶(DNNC)与1,4,6,6-四硝基-1,4-二氮杂环庚烷(TNDA)。利用核磁波谱、红外光谱、... 详细信息

以2,2-二硝基-1,3-丙二醇为原料,分别与叔丁胺和乙二胺反应后再经硝化,合成了2种爆轰性能优异、热稳定性良好的氮杂脂肪环含能化合物:1,3,5,5-四硝基六氢嘧啶(DNNC)与1,4,6,6-四硝基-1,4-二氮杂环庚烷(TNDA)。利用核磁波谱、红外光谱、X射线单晶衍射等手段对目标化合物进行了结构表征;利用差示扫描量热-热重联用研究了其热分解行为;采用BAM测试方法测试了DNNC与TNDA的撞击感度和摩擦感度;基于等键方程与EXPLO5预测了其生成焓与爆轰参数。结果表明,DNNC单晶中环己烷骨架与TNDA单晶中环庚烷骨架均为椅式构象,两种化合物都存在广泛的分子间、分子内非经典氢键;DNNC的相变温度为155.0℃,热分解温度为215.3℃,TNDA的相变温度为154.5℃,热分解温度为205.9℃;DNNC的撞击感度为25 J、摩擦感度为144 N,TNDA的撞击感度为17.5 J、摩擦感度为240 N,均比黑索今(RDX)与奥克托今(HMX)钝感;两种化合物的理论爆速分别为8772 m·s^(-1)、7828 m·s^(-1),理论爆压分别为34.8 GPa、25.0 GPa。

关键词：含能化合物氮杂脂肪环偕二硝基硝胺晶体结构机械感度

Elucidating cellular interactome of chikungunya virus identifies host dependency factors

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Virologica Sinica 2023年第4期38卷 497-507页

作者： Peiqi Yin xia Jian Yihan Liu Yuwen Liu lu Lv Haoran cui Leiliang Zhang Department of Clinical Laboratory Medicine The First Affiliated Hospital of Shandong First Medical University&Shandong Provincial Qianfoshan HospitalJinan250013China NHC Key Laboratory of Systems Biology of Pathogens Institute of Pathogen BiologyChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100176China Department of Pathogen Biology School of Clinical and Basic Medical SciencesShandong First Medical University&Shandong Academy of Medical SciencesJinan250117China Medical Science and Technology Innovation Center Shandong First Medical University&Shandong Academy of Medical SciencesJinan250117China

Chikungunya virus(CHIKV)is a re-emerging mosquito-transmitted RNA virus causing joint and muscle *** better understand how CHIKV rewires the host cell and usurps host cell functions,we generated a systematic CHIKV-human protein-protein interaction map and revealed several novel connections that will inform further mechanistic *** of these novel interactions,between the viral protein E1 and STIP1 homology and U-box containing protein 1(STUB1),was found to mediate ubiquitination of E1 and degrade E1 through the *** associated with G3BP1,G3BP2 and AAAþATPase valosin-containing protein(VCP).Furthermore,VCP inhibitors blocked CHIKV infection,suggesting VCP could serve as a therapeutic *** work is required to fully understand the functional consequences of these *** that CHIKV proteins are conserved across alphaviruses,many virus-host protein-protein interactions identified in this study might also exist in other *** of interactome of CHIKV provides the basis for further studying the function of alphavirus biology.

关键词： Chikungunya virus(CHIKV) Interactome STIP1 homology and U-box containing protein 1(STUB1) Valosin-containing protein(VCP) Capsid

Adaptive Self-Assembly and Induced-Fit Interconversions between Molecular Borromean Rings,Russian Dolls and Ring-in-Ring Complexes

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Chinese Journal of Chemistry 2021年第2期39卷 360-366页

作者： Ye lu Dong Liu Zheng cui Yue-Jian lin Guo-Xin Jin State Key Laboratory of Molecular Engineering of Polymers Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsDepartment of ChemistryFudan University2005 Songhu RoadShanghai200438 China

Herein,we report an artificially assembled interlocked system that features adaptive self-assembly and induced-fit transformation properties in the presence of appropriate guest *** careful choice of solvent and guests,a molecular Borromean rings complex based on organometallic half-sandwich units could be transformed in a stepwise manner to a ring-in-ring complex and a monomeric rectangle,leading to a conversion cycle between these *** adaptive self-assembly method was further applied to the construction of a Russian dolls complex,forming another conversion cycle composed of a molecular Borromean rings complex,a Russian dolls complex and a monomeric rectangle.A comprehensive map showing all of the structural transformations between these metallarectangles and interlocked species is drawn up,representing a recoverable and recyclable transformation mechanism.

关键词： Supramolecular chemistry Catenanes Self-assembly Borromean rings Ring-in-ring complex

林木生物油酚醛环氧混杂型光敏树脂的制备与3D打印

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林产工业 2024年第10期61卷 1-6页

作者：杨璐嘉马丁李蓉娟李永霞朱琳任学勇北京林业大学材料科学与技术学院国家林业草原木质材料循环利用工程技术研究中心北京100083

在国家大力发展绿色低碳经济的背景下,充分利用林木生物质资源生产功能性树脂意义重大。为降低3D打印用光敏树脂的成本并改善其性能,采用林木生物质热裂解产生的生物油来部分替代苯酚合成新型双酚F型酚醛环氧树脂,并替代部分商用树脂制... 详细信息

在国家大力发展绿色低碳经济的背景下,充分利用林木生物质资源生产功能性树脂意义重大。为降低3D打印用光敏树脂的成本并改善其性能,采用林木生物质热裂解产生的生物油来部分替代苯酚合成新型双酚F型酚醛环氧树脂,并替代部分商用树脂制备混杂型光敏树脂,重点探究了添加量对树脂黏度和3D打印试件性能的影响。考察了后处理工艺对试件力学强度的影响,成功打印出多个平面和立体镂空样品。结果表明:林木生物油的引入降低了光敏树脂的黏度和线性收缩率,提升了3D打印材料的拉伸强度。此外,后处理进一步提高了生物油混杂光敏树脂打印件的力学性能。以林木生物油为原料制备生物基光敏树脂,不仅拓宽了林木衍生资源的利用途径,而且为光固化3D打印行业提供一种新型低成本的绿色环保新材料。

关键词：生物油光敏树脂酚醛环氧树脂混杂光固化打印

考虑地层蠕变效应的桥梁桩基施工对邻近运营地铁隧道的影响

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科学技术与工程 2024年第9期24卷 3781-3788页

作者：钱叶琳张振华崔文天苏颖奚邦禄徐恒晖安徽省路港工程有限责任公司合肥230022 合肥工业大学土木与水利工程学院合肥230009

为研究桥梁桩基施工引起地层蠕变效应对邻近地铁隧道安全运营的影响,采用卸荷条件下黏土蠕变特性试验确定了隧道周围土体的蠕变模型,通过数值仿真FLAC^(3D)与现场监测相结合的方法,分析了桩基开挖期间地铁隧道的竖向位移、水平位移和应... 详细信息

为研究桥梁桩基施工引起地层蠕变效应对邻近地铁隧道安全运营的影响,采用卸荷条件下黏土蠕变特性试验确定了隧道周围土体的蠕变模型,通过数值仿真FLAC^(3D)与现场监测相结合的方法,分析了桩基开挖期间地铁隧道的竖向位移、水平位移和应力分布状态。结果表明:广义Kelvin本构模型能够较为准确地描述黏土体开挖卸荷时的蠕变效应;桩基开挖后,邻近地铁隧道衬砌位移不断增大,随后进入稳定状态;随着桩基开挖数量的增加,地铁隧道竖向位移和水平位移总体表现为下沉和向外收敛趋势;桩-隧最小净距越小,桩基施工对隧道影响越大,采用隧道双侧布桩的施工方式,能够有效降低桩基开挖时隧道拱腰的累计水平位移,有利于地铁隧道的安全稳定运营。

关键词：桩基施工运营地铁地层蠕变隧道位移

Effectiveness of inhibitors in increasing chloride threshold value for steel corrosion

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Water Science and Engineering 2013年第3期6卷 354-363页

作者： Jin-xia XU lin-hua JIANG Wei-lun WANG Li TANG Li cui College of Mechanics and Materials Hohai University Shenzhen Durability Center for Civil Engineering Shenzhen University

This investigation was aimed at evaluating the effectiveness of corrosion inhibitors in increasing the chloride threshold value for steel corrosion. Three types of corrosion inhibitors, calcium nitrite （Ca（NO2）2）, zinc oxide （ZnO）, and N,N＇-dimethylaminoethanol （DMEA）, which respectively represented the anodic inhibitor, cathodic inhibitor, and mixed inhibitor, were chosen. The experiment was carried out in a saturated calcium hydroxide （Ca（OH）2） solution to simulate the electrolytic environment of concrete. The inhibitors were initially mixed at different levels, and then chloride ions were gradually added into the solution in several steps. The open-circuit potential （Ecorr） and corrosion current density （lcorr） determined by electrochemical impedance spectra （EIS） were used to identify the initiation of active corrosion, thereby determining the chloride threshold value. It was found that although all the inhibitors were effective in decreasing the corrosion rate of steel reinforcement, they had a marginal effect on increasing the chloride threshold value.

关键词： steel corrosion chloride threshold value, electrochemical impedance spectra (EIS),corrosion inhibitor

谷子秸秆水浸提液对5种作物种子萌发及幼苗生长的化感效应分析

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山东农业科学 2024年第1期56卷 66-73页

作者：崔纪菡鲁一薇夏雪岩刘猛刘建军赵宇李顺国河北省农林科学院谷子研究所/国家谷子改良中心/河北省杂粮研究实验室河北石家庄050035 河北省杂粮产业技术研究院/河北东粮农业科技股份有限公司河北邯郸056000

从化感作用角度筛选适宜与谷子[Setaria italica(L.) Beauv.]进行间套轮作的农作物,为建立合理的谷子间套轮作体系提供参考依据。采用水提法制备谷子根、茎、叶浸提液,每种浸提液设4个浓度梯度(5、20、40、100 mg·mL^(-1)),以蒸馏水为... 详细信息

从化感作用角度筛选适宜与谷子[Setaria italica(L.) Beauv.]进行间套轮作的农作物,为建立合理的谷子间套轮作体系提供参考依据。采用水提法制备谷子根、茎、叶浸提液,每种浸提液设4个浓度梯度(5、20、40、100 mg·mL^(-1)),以蒸馏水为对照(CK),研究谷子植株三部位浸提液对受体作物绿豆[Vigna radiate(L.)Wilczek]、红豆[Vigna angularis(Willd.) Ohwi et Ohashi]、玉米(Zea mays L.)、小麦(Triticum aestivum L.)和谷子种子萌发、幼苗生长的影响。结果表明,谷子根、茎、叶浸提液对受体作物种子发芽率和幼苗生长均有抑制作用,叶部浸提液抑制作用最强,根部浸提液的抑制作用最弱。随着浸提液浓度增加,其对受体种子的发芽率和幼苗鲜重、根长、芽长抑制作用加重。整体上看,谷子秸秆浸提液对5种作物种子萌发的抑制作用由小到大排序为绿豆<红豆<小麦<谷子<玉米。综合来看,绿豆更适宜与谷子进行间作、套作和轮作。

关键词：谷子化感效应种子萌发幼苗生长秸秆浸提液