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Synthesis of Bis-benzimidazolium Cyclic Receptors and Their Anion Binding Properties

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Chinese Journal of Chemistry 2013年第5期31卷 673-678页

作者： Xiaozhi jiang Meiyun Feng dawei Zhang Binshen Wang Zhiyun Dong Guohua Gao Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry East China Normal University 3663 North Zhongshan Road Shanghai 200062 China

A series of cyclic receptors 1--5 based on bis-benzimidazolium group were designed and synthesized. Their anion recognition properties were investigated by UV-vis, fluorescent spectroscopy, 1H NMR and MALDI-TOF mass spectrometry. The UV-vis and fluorescent spectroscopic studies showed that the receptors 1--5 had different binding abilities for various anions such as fluoride, chloride, bromide, iodide and acetate. The high selectivity of the receptors for fluoride and acetate anions is attributed to their basicity. Job plot and MALDI-TOF mass spec- trometry demonstrated that the receptors form 1 ： 1 complex with fluoride. DFT calculation and 1H NMR studies indicated that the receptors bind anions through （C--H）＋…X- hydrogen bond.

关键词： cyclic ionic receptors bis-benzimidazolium anion recognition hydrogen bond

Spherical nucleic acids:Organized nucleotide aggregates as versatile nanomedicine

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Aggregate 2022年第1期3卷 1-20页

作者： Yangmeihui Song Wenyu Song Xiaoli Lan Weibo Cai dawei jiang Department of Nuclear Medicine Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Hubei Key Laboratory of Molecular Imaging WuhanChina Departments of Radiology and Medical Physics University of Wisconsin-MadisonMadisonWisconsinUSA

Spherical nucleic acids(SNAs)are composed of a nanoparticle core and a layer of densely arranged oligonucleotide *** the first report of SNA by Mirkin and coworkers in 1996,it has created a significant interest by offering new possibilities in the field of gene and drug *** controlled aggregation of oligonucleotides on the surface of organic/inorganic nanoparticles improves the delivery of genes and nucleic acid–based drugs and alters and regulates the biological profiles of the nanoparticle core within living *** in this review,we present an overview of the recent progress of SNAs that has speeded up their biomedical application and their potential transition to clinical *** start with introducing the concept and characteristics of SNAs as drug/gene delivery systems and highlight recent efforts of bioengineering SNA by imaging and treatmenting various ***,we discuss potential challenges and opportunities of SNAs,their ongoing clinical trials,and future translation,and how they may affect the current landscape of clinical *** hope that this review will update our current understanding of SNA,organized oligonucleotide aggregates,for disease diagnosis and treatment.

关键词： drug delivery gene regulation molecular imaging spherical nucleic acids

Investigating the thermal conductivity of materials by analyzing the temperature distribution in diamond anvils cell under high pressure

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Chinese Physics B 2022年第4期31卷 219-224页

作者： Caihong Jia Min Cao Tingting Ji dawei jiang Chunxiao Gao State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130000China College of Mathematics and Physics Inner Mongolia University for NationalitiesTongliao 028043China

Investigating the thermal transport properties of materials is of great importance in the field of earth science and for the development of materials under extremely high temperatures and ***,it is an enormous challenge to characterize the thermal and physical properties of materials using the diamond anvil cell(DAC)*** the present study,a steady-state method is used with a DAC and a combination of thermocouple temperature measurement and numerical analysis is performed to calculate the thermal conductivity of the *** this end,temperature distributions in the DAC under high pressure are *** propose a three-dimensional radiative-conductive coupled heat transfer model to simulate the temperature field in the main components of the DAC and calculate in situ thermal conductivity under high-temperature and high-pressure *** proposed model is based on the finite volume *** obtained results show that heat radiation has a great impact on the temperature field of the DAC,so that ignoring the radiation effect leads to large errors in calculating the heat transport properties of ***,the feasibility of studying the thermal conductivity of different materials is discussed through a numerical model combined with locally measured temperature in the *** article is expected to become a reference for accurate measurement of in situ thermal conductivity in DACs at high-temperature and high-pressure conditions.

关键词： thermal conductivity heat radiation effect temperature field diamond anvil cell

Effect of deformation of diamond anvil and sample in diamond anvil cell on the thermal conductivity measurement

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Chinese Physics B 2021年第12期30卷 473-478页

作者： Caihong Jia dawei jiang Min Cao Tingting Ji Chunxiao Gao State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130000China

Studies show that the sample thickness is an important parameter in investigating the thermal transport properties of materials under high-temperature and high-pressure(HTHP)in the diamond anvil cell(DAC)***,it is an enormous challenge to measure the sample thickness accurately in the DAC under severe working *** conventional methods,the influence of diamond anvil deformation on the measuring accuracy is *** a hightemperature anvil,the mechanical state of the diamond anvil becomes complex and is different from that under the static *** high temperature,the deformation of anvil and sample would be *** the present study,the finite volume method is applied to simulate the heat transfer mechanism of stable heating DAC through coupling three radiativeconductive heat transfer mechanisms in a high-pressure *** the temperature field of the main components is known in DAC,the thermal stress field can be analyzed numerically by the finite element *** obtained results show that the deformation of anvil will lead to the obvious radial gradient distribution of the sample *** the top and bottom surfaces of the sample are approximated to be flat,it will be fatal to the study of the heat transport properties of the ***,we study the temperature distribution and thermal conductivity of the sample in the DAC by thermal-solid coupling method under high pressure and stable heating condition.

关键词： diamond anvil cell deformation thermal conductivity thermal-solid coupling method

Elevated atmospheric CO_(2) impact on carbon and nitrogen transformations and microbial community in replicated wetland

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Ecological Processes 2020年第1期9卷 677-688页

作者： dawei jiang Lifei Chen Nan Xia Eyram Norgbey Desmond Ato Koomson Williams Kweku Darkwah College of Horticulture Jilin Agricultural UniversityChangchun 130118China Jilin Tiandiren Landscape Architecture Design Engineering Co.Ltd. Changchun 130117China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationEnvironmental Engi neering DepartmentCollege of EnvironmentHohai University1 Xikang RoadGulou210098 NanjingChina

Background:Elevated atmospheric CO_(2) has direct and indirect influences on ecosystem *** impact of elevated atmospheric CO_(2) concentration on carbon and nitrogen transformations,together with the microbial community,was evaluated with water hyacinth(Eichhornia crassipes)in an open-top chamber replicated *** responses of nitrogen and carbon pools in water and wetland soil,and microbial community abundance were studied under ambient CO_(2) and elevated CO_(2)(ambient+200μL L^(−1)).Results:Total biomass for the whole plant under elevated CO_(2) increased by an average of 8%(p=0.022).Wetlands,with water hyacinth,showed a significant increase in total carbon and total organic carbon in water by 7%(p=0.001)and 21%(p=0.001),respectively,under elevated CO_(2) compared to that of ambient CO_(2).Increase in dissolved carbon in water correlates with the presence of wetland plants since the water hyacinth can directly exchange CO_(2) from the atmosphere to water by the upper epidermis of ***,the enrichment CO_(2) showed an increase in total carbon and total organic carbon concentration in wetland soil by 3%(p=0.344)and 6%(p=0.008),*** total nitrogen content in water increased by 26%(p=0.0001),while total nitrogen in wetland soil pool under CO_(2) enrichment decreased by 9%(p=0.011)due to increased soil microbial community abundance,extracted by phospholipid fatty acids,which was 25%larger in amount than that of the ambient ***:The study revealed that the elevated CO_(2) would affect the carbon and nitrogen transformations in wetland plant,water,and soil pool and increase soil microbial community abundance.

关键词： Elevated CO_(2) Carbon transformation Nitrogen transformation Microbial community abundance Phospholipid fatty acids Open-top chamber

健康中国战略融入医学院校“大思政课”建设路径探索

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锦州医科大学学报(社会科学版) 2025年第1期23卷 48-52页

作者：蒋大伟西安医学院口腔医学院陕西西安710021

健康中国战略是中国健康事业发展的重要举措,可以为医学院校“大思政课”建设提供重要的理论支撑和方向指南。当前,健康中国战略融入医学院校“大思政课”建设的过程中存在课程建设滞后、平台建设低效和人才队伍失衡等现实困境。为此,... 详细信息

健康中国战略是中国健康事业发展的重要举措,可以为医学院校“大思政课”建设提供重要的理论支撑和方向指南。当前,健康中国战略融入医学院校“大思政课”建设的过程中存在课程建设滞后、平台建设低效和人才队伍失衡等现实困境。为此,医学院校如何用好健康中国战略这剂“药方”上好“大思政课”,是医学院校着力提升健康育人实效、培养高素质医学人才的应有之义。

关键词：健康中国战略医学院校大思政课

In situ stress state and seismic hazard in the Dayi seismic gap of the Longmenshan thrust belt

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Science China Earth Sciences 2022年第7期65卷 1388-1398页

作者： Bing LI Furen XIE Jinshui HUANG Xiwei XU Qiliang GUO Guangwei ZHANG Junshan XU Jianxin WANG dawei jiang Jian WANG Lifeng DING School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China National Institute of Natural Hazards Ministry of Emergency ManagementBeijing 100085China

In the Longmenshan thrust belt,the Dayi seismic gap,an area with few earthquakes,is located between the ruptures of the 2008 Wenchuan Earthquake and the 2013 Lushan Earthquake,with a length of approximately 40–60 *** date,however,the extent of the seismic hazard of the Dayi seismic gap and whether this gap is under high stress are still hotly *** further evaluate the seismic hazard of the Dayi seismic gap with regard to stress,two boreholes(1,000 and 500 m deep)were arranged to carry out hydraulic fracturing in situ stress measurement on either side of the Shuangshi-Dachuan fault *** zone has a high seismic hazard and the capacity to undergo surface *** the analogy of this new data with stability analysis using Byerlee’s Law and existing stress measurement data collected before strong earthquakes,the results show that the area surrounding the Shuangshi-Dachuan fault zone in the Dayi seismic gap(Dachuan Town)is in a state of high in situ stress,and has the conditions necessary for friction slip,with the potential hazard of moderate to strong *** results are the first to reveal the in situ stress profile at a depth of 1,000 m in the Dayi seismic gap,and provide new data for comprehensive evaluation of the seismic hazard in this seismic gap,which is of great significance to explore the mechanism of earthquake occurrence and to help mitigate future disaster.

关键词： Dayi seismic gap Wenchuan Earthquake Lushan Earthquake In situ stress state Byerlee criterion Fault stability

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Dynamic Simulation Analysis of Humanoid Robot Walking System Based on ADAMS

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Journal of Shanghai Jiaotong university(Science) 2019年第1期24卷 58-63页

作者： ZHANG Bangcheng SHAO Chen LI Yongsheng TAN Haidong jiang dawei School of Mechatronic Engineering Changchun University of Technology CRCC Changchun Railway Vehicles Co. Ltd. School of Applied Technology Changchun University of Technology

Humanoid robots are a hot topic in the field of robotics research. The walking system is the critical part of the humanoid robot, and the dynamic simulation of the walking system is of great importance. In this paper, the stability of the walking system and the rationality of its structural design are considered in the study of dynamics for a humanoid robot. The dynamic model of humanoid robot walking system is established by using the Lagrange dynamics method. Additionally, the three-dimensional model of CATIA is imported into ADAMS. The humanoid robot walking system is added with the movement of the deputy and the driving force in the *** torque and angular velocity of the ankle joint and hip joint are analyzed in the process of knee bends. The simulation results show that the overall performance of the humanoid robot walking system is favorable and has a smooth movement, and the specified actions can be completed, which proves the rationality of the humanoid robot walking system design.

关键词： humanoid robot walking system Lagrange method dynamics ADAMS

Structural and functional imaging of brains

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Science China Chemistry 2023年第2期66卷 324-366页

作者： Zhichao Liu Ying Zhu Liming Zhang Weiping jiang Yawei Liu Qiaowei Tang Xiaoqing Cai jiang Li Lihua Wang Changlu Tao Xianzhen Yin Xiaowei Li Shangguo Hou dawei jiang Kai Liu Xin Zhou Hongjie Zhang Maili Liu Chunhai Fan Yang Tian Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai200241China Interdisciplinary Research Center Shanghai Synchrotron Radiation FacilityZhangjiang LaboratoryShanghai Advanced Research InstituteChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai201210China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Chinese Academy of SciencesWuhan National Laboratory for OptoelectronicsWuhan430071China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China Department of Chemistry Tsinghua UniversityBeijing100084China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesInstitute of Translational MedicineShanghai Jiao Tong UniversityShanghai200240China Interdisciplinary Center for Brain Information Brain Cognition and Brain Disease InstituteShenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research InstitutionsFaculty of Life and Health SciencesShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China Lingang Laboratory Shanghai201602China School of Biomedical Engineering Shanghai Jiao Tong UniversityShanghai200240China Institute of Systems and Physical Biology Shenzhen Bay LaboratoryShenzhen518055China Department of Nuclear Medicine Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China

Analyzing the complex structures and functions of brain is the key issue to understanding the physiological and pathological *** neuronal morphology and local distribution of neurons/blood vessels in the brain have been known,the subcellular structures of cells remain challenging,especially in the live *** addition,the complicated brain functions involve numerous functional molecules,but the concentrations,distributions and interactions of these molecules in the brain are still poorly *** this review,frontier techniques available for multiscale structure imaging from organelles to the whole brain are first overviewed,including magnetic resonance imaging(MRI),computed tomography(CT),positron emission tomography(PET),serial-section electron microscopy(ss EM),light microscopy(LM)and synchrotron-based X-ray microscopy(XRM).Specially,XRM for three-dimensional(3D)imaging of large-scale brain tissue with high resolution and fast imaging speed is ***,the development of elegant methods for acquisition of brain functions from electrical/chemical signals in the brain is *** particular,the new electrophysiology technologies for neural recordings at the single-neuron level and in the brain are also *** also focus on the construction of electrochemical probes based on dual-recognition strategy and surface/interface chemistry for determination of chemical species in the brain with high selectivity and long-term stability,as well as electrochemophysiological microarray for simultaneously recording of electrochemical and electrophysiological signals in the ***,the recent development of brain MRI probes with high contrast-to-noise ratio(CNR)and sensitivity based on hyperpolarized techniques and multi-nuclear chemistry is ***,multiple optical probes and instruments,especially the optophysiological Raman probes and fiber Raman photometry,for imaging and biosensing in live brain are emphas

关键词： brain structure brain function brain chemistry chemical signal biosensing and bioimaging