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A new class of crystalline X-ray induced photochromic materials assembled from anion-directed folding of a flexible cation

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Chinese Chemical Letters 2024年第8期35卷 554-557页

作者： Hong-Jin Liao Zhu zhuo Qing Li Yoshihito Shiota Jonathan P.Hill Katsuhiko Ariga Zi-Xiu Lu Lu-Yao Liu Zi-ang Nan Wei Wang You-Gui Huang CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China Institute for Materials Chemistry and Engineering Kyushu UniversityFukuoka 819-0395Japan World Premier International(WPI)Center for Materials Nanoarchitectonics(MANA) National Institute for Materials Science(NIMS)Ibaraki 305-0044Japan

Electron-deficient viologens are widely used as ligands or structure-directing agents(SDAs)to synthesize crystalline X-ray induced photochromic ***,a new rational strategy of anion-directed fold-ing a flexible cation(H_(2)imb)^(2+)((H_(2)imb)^(2+)=di-protonated 2,3-bis(imidazolin-2-yl)-2,3-dimethylbutane)has been ***-donating Cl−and(ZnCl4)2−are used to direct folding a flexible electron-deficient(H_(2)imb)^(2+)*** complexes(H_(2)imb)(NO_(3))2(1),(H_(2)imb)Cl2·H_(2)O(2),and(H_(2)imb)ZnCl4(3)have been synthesized in which(H_(2)imb)^(2+)crystallize in an anti-conformation,88.8°-gauche,and 51.8°-gauche,*** contrary to X-ray silent complex 1,X-ray induced photochromism has been achieved in both complex 2 and *** intermolecular charge-transfer mechanism has been elucidated and the anion directed folding of(H_(2)imb)^(2+)has been validated to be critical to yield colored long-lived charge-separated states.

关键词： Supramolecular Photochromic X-ray induced Anion-directed folding Electron-deficient viologens

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多道次拉伸和感应电流处理5052铝合金的力学性能和显微组织演变

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Transactions of Nonferrous Metals Society of China 2024年第1期34卷 65-79页

作者：王世鹏崔晓辉肖昂余卓行杜志浩中南大学轻合金研究院长沙410083 中南大学机电工程学院长沙410083 中南大学高性能复杂制造国家重点实验室长沙410083

提出一种多道次拉伸和感应电流处理(IEPT)相结合的复合成形方法,采用TEM和EBSD揭示感应电流对材料显微组织和力学性能的影响规律。结果表明,采用4次拉伸5%和拉伸后放电,材料伸长率比原始材料增加145%。预拉伸试样经过IEPT处理后,强度下... 详细信息

提出一种多道次拉伸和感应电流处理(IEPT)相结合的复合成形方法,采用TEM和EBSD揭示感应电流对材料显微组织和力学性能的影响规律。结果表明,采用4次拉伸5%和拉伸后放电,材料伸长率比原始材料增加145%。预拉伸试样经过IEPT处理后,强度下降、塑性提高,材料的位错密度下降,晶粒变形结构向亚结构转变,同时晶粒尺寸略有增加。感应电流减弱材料的各向异性,出现新的//TD织构。电塑性效应和焦耳热效应的结合增强位错运动和空位移动。采用ANSYS软件模拟板料的温度分布,最高温度达到144.7℃。材料强度的理论计算结果与实验数据一致。

关键词： 5052铝合金感应电流织构演变焦耳热模拟强度计算

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Effect and mechanism of ubiquitin-like protein FAT10 on angⅡinduced endothelial cell inflammation

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China Medical Abstracts(Internal Medicine) 2024年第1期41卷 39-40页

作者：卓雯 Dept Cardiovasc Med 2nd Affil HospNanchang UnivNanchang 330006

Objective To investigate the role and related mechanism of ubiquitin-like protein FAT10 in the angiotensinⅡ(angⅡ)-induced endothelial cell inflammatory *** The Western blot was used to detect the protein expression of FAT10 in 16-week old WKY rat carotid artery,thoracic aorta artery,renal artery and vascular smooth muscle cells (VSMC).

关键词： angⅡ ubiquitin artery

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高铁齿轮箱在用油衰变状态研究

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合成润滑材料 2024年第2期51卷 30-35页

作者：潘卓郝丽春杨鹤李昂张峥中石化石油化工科学研究院有限公司北京100083

我国高铁技术快速发展,运行里程不断增加,齿轮箱是高速动车组主要技术之一。为了保证传动齿轮具有良好的工作状态,高铁齿轮箱润滑油应保持优异性能,监测高铁齿轮箱在用油性能以判断齿轮箱状态是一项保障高铁安全运行的重要工作。以两种... 详细信息

我国高铁技术快速发展,运行里程不断增加,齿轮箱是高速动车组主要技术之一。为了保证传动齿轮具有良好的工作状态,高铁齿轮箱润滑油应保持优异性能,监测高铁齿轮箱在用油性能以判断齿轮箱状态是一项保障高铁安全运行的重要工作。以两种高铁齿轮箱新油和旧油为研究对象,分析油样黏度、总酸值、颗粒物污染度、元素、摩擦磨损和极压性能,获得高铁齿轮油经过一个换油周期后的性能状态,为高铁齿轮箱油监测技术提供帮助。

关键词：高铁齿轮箱油颗粒物摩擦磨损极压性能

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加味四妙散对急性痛风性关节炎大鼠的疗效及对滑膜组织中嘌呤能离子通道型受体7 NOD样受体热蛋白结构域相关蛋白3表达的影响

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中国药物与临床 2024年第6期24卷 341-347,F0003页

作者：付朝江贺渊哲杨卓李昂肖群飞湖南中医药大学研究生院湖南长沙410208 湖南中医药大学附属常德中医医院创伤一科湖南常德415000

目的通过研究加味四妙散干预急性痛风性关节炎大鼠滑膜组织中嘌呤能离子通道型受体7(P2X7R)、NOD样受体热蛋白结构域相关蛋白3(NLRP3)表达的影响,探讨加味四妙散在防治急性痛风性关节炎的疗效及抗炎作用机制。方法选择雄性SD大鼠60只,... 详细信息

目的通过研究加味四妙散干预急性痛风性关节炎大鼠滑膜组织中嘌呤能离子通道型受体7(P2X7R)、NOD样受体热蛋白结构域相关蛋白3(NLRP3)表达的影响,探讨加味四妙散在防治急性痛风性关节炎的疗效及抗炎作用机制。方法选择雄性SD大鼠60只,按照随机数字表法分为6组,分别为空白对照组、模型组、秋水仙碱组、加味四妙散低剂量组、加味四妙散中剂量组、加味四妙散高剂量组,每组10只。空白对照组给予等体积0.9%氯化钠注射液在相应的部位,其余5组复制高尿酸血症并急性痛风性关节炎大鼠模型。加味四妙散组予加味四妙散低、中、高剂量水提液(4.24 g/kg、8.48 g/kg、16.96 g/kg)灌胃、秋水仙碱组予秋水仙碱混悬液(3 mg/kg)灌胃。模型组予等量0.9%氯化钠注射液灌胃。经过4 h、8 h、12 h、24 h和48 h的治疗,对右踝关节的肿胀情况及大鼠步态进行观察。末次给药2 h后,通过腹主动脉采血,采用生化法检测血清尿酸浓度、肝肾功能及血清三磷酸腺苷(ATP)水平,酶联免疫吸附试验(ELISA)测定血清中白细胞介素(IL)-1β、IL-8含量,取受试踝关节滑膜组织,苏木精-伊红染色(HE)观察滑膜组织病理情况,利用蛋白免疫印迹法检测滑膜组织中NLRP3、P2X7R蛋白的表达。结果除空白对照组外,各组大鼠的踝关节肿胀率从造模后4~8 h开始上升,24 h达高峰后下降。在造模48 h后,秋水仙碱组和加味四妙散的低、中、高剂量组的肿胀率减轻,步态逐渐改善(P2X7R、NLRP3蛋白表达均降低(P2X7R蛋白的表达,降低局部组织炎症反应,从而发挥治疗作用。

关键词：加味四妙散高尿酸血症关节炎,痛风性 P2X7R、NLRP3蛋白

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Quantum-Enhanced Blockchain: A Secure and Practical Blockchain Scheme

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Computers, Materials & Continua 2023年第7期76卷 259-277页

作者： ang Liu Xiu-Bo Chen Gang Xu zhuo Wang Xuefen Feng Huamin Feng Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China Network and Information Management Division Beijing Electronic Science and Technology InstituteBeijing100070China School of Information Science and Technology North China University of TechnologyBeijing100144China School of Artificial Intelligence Beijing University of Posts TelecommunicationsBeijing100876China Mathematics Teaching and Research Center Beijing Fengtai Yihai High SchoolBeijing100070China General Office Beijing Electronic Science and Technology InstituteBeijing100070China

The rapid advancement of quantum technology poses significant security risks to blockchain ***,quantum technology can also provide solutions for enhancing blockchain *** this paper,we propose a quantum-enhanced blockchain scheme to achieve a high level of security against quantum computing *** first discuss quantum computing attacks on classic blockchains,including attacks on hash functions,digital signatures,and consensus *** then introduce quantum technologies,such as a quantum hash function(QHF),a quantum digital signature(QDS),and proof of authority(PoA)consensus mechanism,into our scheme to improve the security of the blockchain *** security analysis demonstrates that our scheme offers superior security against quantum and classic ***,we compare our scheme with previous works,showing that our scheme has achieved a perfect balance in terms of practicality,reliability,scalability,and ***,this work contributes to the ongoing research on quantum blockchain in the quantum era.

关键词： Quantum blockchain quantum hash function quantum digital signature

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Blue light is more essential than red light for maintaining the activities of photosystem Ⅱ and Ⅰ and photosynthetic electron transport capacity in cucumber leaves

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Journal of Integrative Agriculture 2016年第1期15卷 87-100页

作者： MIAO Yan-xiu W ang Xiao-zhuo G AO Li-hong C HEN Qing-yun QU Mei Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops College of Agriculture and Biotechnology China Agricultural UniversityBeijing 100193P.R.China

Blue and red lights differently regulate leaf photosynthesis. Previous studies indicated that plants under blue light generally exhibit better photosynthetic characteristics than those under red light. However, the regulation mechanism of related photosynthesis characteristics remains largely unclear. Here, four light qualities treatments （300 μmol m-2 s-1） including white fluorescent light （FL）, blue monochromatic light （B, 440 nm）, red monochromatic light （R, 660 nm）, and a combination of red and blue light （RB, R：B=8：1） were carried out to investigate their effects on the activity of photosystem II （PSII） and photosystem I （PSI）, and photosynthetic electron transport capacity in the leaves of cucumber （Cucumis sativus L.） seedlings. The results showed that compared to the FL treatment, the R treatment significantly limited electron transport rate in PSII （ETR11） and in PSI （ETR1） by 79.4 and 66.3%, respectively, increased non-light induced non-photochemical quenching in PSII （q^No） and limitation of donor side in PSI （φND） and reduced most JIP-test parameters, suggesting that the R treatment induced suboptimal activity of photosystems and inhibited electron transport from PSII donor side up to PSI. However, these suppressions were effectively alleviated by blue light addition （RB）. Compared with the R treatment, the RB treatment significantly increased ETR, and ETR1 by 176.9 and 127.0%, respectively, promoted photosystems activity and enhanced linear electron transport by elevating electron transport from QA to PSI. The B treatment plants exhibited normal photosystems activity and photosynthetic electron transport capacity similar to that of the FL treatment. It was concluded that blue light is more essential than red light for normal photosynthesis by mediating photosystems activity and photosynthetic electron transport capacity.

关键词： cucumber photosystem II photosystem I electron transport

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An Information Entropy-Based Methodology to Construct the Avulsion Threshold in the Tail Reach of the Estuarine Alluvial Plain

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China Ocean Engineering 2023年第5期37卷 794-806页

作者： Yang zhuo-yuan XIA Jun-qiang DENG Shan-shan ZHOU Mei-rong JI Zu-wen YU Xin State Key Laboratary of Water Resources and Management Wuhan UniversityWuhan 430072China Changjiang Survey PlanningDesign and Research Co.LtdWuhan 430010China State Key Laboratary of Simulation and Regulation of River Basin Water Cycle China Insititute of Water Resources and Hydropower ResearchBeijing 100048China Yellow River Institute of Hydraulic Research Yellow River Conservancy CommisionZhengzhou 450003China

Channel avulsion is a natural phenomenon that occurs abruptly on alluvial river deltas,which can affect the channel *** causes for avulsion could be generally categorized as topography-and flood-driven ***,previous studies on avulsion thresholds usually focused on topography-driven factors due to the centurial or millennial avulsion timescales of the world’s most deltas,but neglected the impacts of flood-driven *** the current study,a novel demarcation equation including the two driven factors was proposed,with the decadal timescale of avulsion being considered in the Yellow River Estuary(YRE).In order to quantify the contributions of different factors in each category,an entropy-based methodology was used to calculate the contributing weights of these *** factor with the highest weight in each category was then used to construct the demarcation equation,based on avulsion datasets associated with the *** avulsion threshold was deduced according to the demarcation *** avulsion threshold was then applied to conduct the risk assessment of avulsion in the *** results show that:two dominant factors cover respectively geomorphic coefficient representing the topography-driven factor and fluvial erosion intensity representing the flood-driven factor,which were thus employed to define a two dimensional mathematical space in which the demarcation equation can be obtained;the avulsion threshold derived from the equation was also applied in the risk assessment of avulsion;and the avulsion threshold proposed in this study is more accurate,as compared with the existing thresholds.

关键词： avulsion threshold threshold conditions entropy weight method tail reach Yellow River Estuary

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Genome-wide CRISPR activation screen identifies candidate receptors for SARS-CoV-2 entry

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Science China(Life Sciences) 2022年第4期65卷 701-717页

作者： Shiyou Zhu Ying Liu zhuo Zhou Zhiying Zhang Xia Xiao Zhiheng Liu ang Chen Xiaojing Dong Feng Tian Shihua Chen Yiyuan Xu Chunhui Wang Qiheng Li Xuran Niu Qian Pan Shuo Du Junyu Xiao Jianwei Wang Wensheng Wei Biomedical Pioneering Innovation Center Beijing Advanced Innovation Center for GenomicsPeking-Tsinghua Center for Life SciencesPeking University Genome Editing Research CenterState Key Laboratory of Protein and Plant Gene ResearchSchool of Life SciencesPeking UniversityBeijing100871China State Key Laboratory of Protein and Plant Gene Research School of Life SciencesPeking UniversityPeking-Tsinghua Center for Life SciencesPeking UniversityBeijing Advanced Innovation Center for GenomicsPeking UniversityBeijing 100871China NHC Key Laboratory of Systems Biology of Pathogens and Christophe Merieux Laboratory Institute of Pathogen BiologyChinese Academy of Medical Sciences and Peking Union Medical CollegeKey Laboratory of Respiratory Disease PathogenomicsChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China

The outbreak of coronavirus disease 2019(COVID-19) caused by SARS-CoV-2 has created a global health crisis. SARS-CoV-2 infects varieties of tissues where the known receptor ACE2 is low or almost absent, suggesting the existence of alternative viral entry pathways. Here, we performed a genome-wide barcoded-CRISPRa screen to identify novel host factors that enable SARS-CoV-2 infection. Beyond known host proteins, i.e., ACE2, TMPRSS2, and NRP1, we identified multiple host components,among which LDLRAD3, TMEM30A, and CLEC4G were confirmed as functional receptors for SARS-CoV-2. All these membrane proteins bind directly to spike’s N-terminal domain(NTD). Their essential and physiological roles have been confirmed in either neuron or liver cells. In particular, LDLRAD3 and CLEC4G mediate SARS-CoV-2 entry and infection in an ACE2-independent fashion. The identification of the novel receptors and entry mechanisms could advance our understanding of the multiorgan tropism of SARS-CoV-2, and may shed light on the development of COVID-19 countermeasures.

关键词： CRISPRa screen SARS-CoV-2 novel receptors

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X射线荧光光谱分析

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分析试验室 2006年第5期25卷 113-122页

作者：卓尚军吉昂中国科学院上海硅酸盐研究所

本文评述了我国在2002年7月～2004年6月间X射线荧光光谱, 包括粒子激发的X射线光谱的发展和应用, 内容包括仪器的研制、维护和维修、样品制备技术、 X射线荧光光谱基础研究、谱处理、分析方法研究和应用.

关键词： X射线荧光光谱粒子激发X射线光谱仪器定量分析

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