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Investigation of solid-state reaction by terahertz time-domain spectroscopy

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Nuclear Science and Techniques 2011年第3期22卷 139-143页

作者： liU Xiaohong ZHAO Hongwei wu Yuting li Qingnuan zhu Zhiyong Shanghai Institute of Applied physics Chinese Academy of Sciences Shanghai 201800 China

Terahertz time-domain spectroscopy(THz-TDS)was utilized to investigate the solid-state reaction between L(+)-Tartaric acid and sodium hydrogen *** sodium hydrogen L(+)-tartrate monohydrate was synthesized efficiently by mechanical grinding,which is particularly sustainable and environmentally *** THz absorptions were observed for pure reactants and the proposed *** reaction process could be clearly visualized by THz spectral patterns of the reaction mixtures at different grinding *** observed results were further confirmed by synchrotron radiation X-ray powder diffraction(SRXRPD)and Fourier transform infrared (FT-IR)*** study demonstrates that THz-TDS is an effective novel tool to monitor solid-state reactions in pharmaceutical industry.

关键词：太赫兹时域光谱固态反应傅里叶变换红外光谱 X射线粉末衍射碳酸氢钠可持续发展反应混合物机械研磨

Relationship between archaeological sites distribution and environment from 1.15 Ma BP to 278 BC in Hubei Province

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Journal of Geographical Sciences 2011年第5期21卷 909-925页

作者： li Lan wu li zhu Cheng li Feng MA Chunmei School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210093 China

A total of 1362 archaeological sites from the Paleolithic Age to the Warring States time in Hubei Province increase gradually from west to east and from high land to low *** number of Paleolithic sites with altitude of 50-500 m account for 78% of the whole,while 71%-95% of sites from the Neolithic Age to the Warring States time mainly distribute at the areas of 0-200 *** temporal-spatial distribution of archeological sites in this area is affected by two *** one thing,the human beings of every period need to choose the first or the second terrace as living sites which are near water source and are easy to withstand ***,affecting by the regional tectonic uplift since the Holocene,down cutting of rivers can form new river valley,and lateral erosion and accumulation of river in stable time of tectonic movement can result in increasing of many new ***,the human beings migrated to adapt to the change of terrace location,leading to the sites increase gradually in the lower areas of the central and eastern parts of this *** other things,the temporal-spatial distribution of archeological sites in this area is affected by the climate *** Paleolithic sites mostly distribute in the Hanshui River Valley in northeastern Shiyan,southeast of Jinzhou and east of Jinmen,which is because rivers distributed in higher areas in this *** the Chengbeixi Culture period,the sites are rare in the quondam Paleolithic sites distribution area,but increase obviously along the Yangtze River near the southwest *** spore-pollen record of Dajiuhu Basin indicates that only 23 Chengbeixi cultural sites may be related to more precipitation and flood during the Holocene wet and hot *** Daxi Culture,Qujialing Culture and Shijiahe Culture are corresponding to middle and top of the Dajiuhu spore-pollen Zone Ⅳ,during which the climate is in order as a whole and is propitious to agricultural *** the Qujialing Culture

关键词： Hubei Province the Paleolithic Age to the Warring States time temporal-spatial distribution of archeological sites river landform pollen record environmental evolution

Multi-component KN Hierarchy and Associated two Integrable Couplings as Well as Their Hamiltonian Structure

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Chinese Quarterly Journal of Mathematics 2008年第3期23卷 415-422页

作者： JIANG Xiao-wu li zhu College of Mathematics and Information Science Xinyang Normal University Xinyang 464000 China

Firstly, a vector loop algebra G3 is constructed, by use of it multi-component KN hierarchy is obtained. Further, by taking advantage of the extending vector loop algebras G6 and G9 of G3 the double integrable couplings of the multi-component KN hierarchy are worked out respectively. Finally, Hamiltonian structures of obtained system are given by quadratic-form identity.

关键词： KN hierarchy integrable couplings quadratic-form identity Hamiltonian structure

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang Feng Gao Yu-Gui Peng Peng wu Zong-lin li Xue-Feng zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

A micro-sphere catalyst complex with nano CaCO_3 precursor for hydrogen production used in ReSER process

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Engineering Sciences 2010年第1期8卷 22-26页

作者： wu Sufang li lianbao zhu Yanqing Wang Xieqing Department of Chemical and Biological Engineering Zhejiang-University Hangzhou 310027 China

This paper describes the preparation and evaluation of a micro-sphere catalytic complex for the hydrogen production in a Reactive Sorption Enhanced Reforming （ReSER） process. The catalytic complex made by a spray technique has a dual function containing Ni as a catalytic material and CaO as an adsorption material used in the ReSER process. The attrition characteristics of the catalytic complex are acceptable for the commercial used. The nano GaCO3 material used as a precursor of CaO showed a desirable durability with a CO2 sorption capacity of 0.6 mol CO2/kg after 10 repeating cycles under the carbonation temperature of 600 ℃, a CO2 partial pressure of 0.02 MPa, and a calcination temperature of 750 ℃ in N2 measured by a thermal gravimetric analyzer. The testing of the catalytic complex for ReSER showed a hydrogen yield of over 95 % （v/v） in the laboratory fixed fluidized bed reactor. The catalytic system has an attractive prospect in the ReSER process for hydrogen production, especially in the fluidized mode where reactor and regenerator combined in a cycling process.

关键词： hydrogen nano calcium carbonate adsorption catalytic activation reaction engineering stability

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放氢交叉偶联反应

化学学报 2020年第4期78卷 299-310页

作者：董奎刘强吴骊珠兰州大学功能有机分子化学国家重点实验室中国科学院理化技术研究所光化学转换与功能材料重点实验室

过渡金属催化的脱氢偶联反应是一类高效的化学键构筑方式,但通常需要当量甚至过量的氧化剂以移除脱氢过程产生的电子及质子,其氧化剂残渣对环境有一定的污染.放氢交叉偶联(CCHE)反应摒弃了传统脱氢反应中当量氧化剂的使用,在温和条件下... 详细信息

过渡金属催化的脱氢偶联反应是一类高效的化学键构筑方式,但通常需要当量甚至过量的氧化剂以移除脱氢过程产生的电子及质子,其氧化剂残渣对环境有一定的污染.放氢交叉偶联(CCHE)反应摒弃了传统脱氢反应中当量氧化剂的使用,在温和条件下实现碳-氢或杂-氢键直接交叉偶联且唯一副产物为氢气,不仅避免了因原料或产物对氧化剂敏感而发生的副反应,而且在规模化生产中具有很高的附加值,是一种更加绿色的合成策略.本综述从放氢交叉偶联反应机理、化学键构筑类型以及反应延伸等角度归纳并介绍了近年来放氢交叉偶联反应的研究进展,并对该领域的发展前景进行了展望.

关键词：放氢交叉偶联反应可见光催化电化学合成绿色化学合成策略

ENHANCEMENT OF ENERGY TRANSFER FROM THE TERMINAL CHROMOPHORE OF POLYETHER TO EUROPIUM CATION（Ⅲ）VIA C

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影像科学与光化学 1994年第3期 259-262页

作者： TUNG CHEN-HO wu li-zhu(The Labomtory of Photochemistry, Institute of Photapmphic Chemistry,Chinese Academy of Sctences,Beijing 100101, P.R.China)

ＥＮＨＡＮＣＥＭＥＮＴＯＦＥＮＥＲＧＹＴＲＡＮＳＦＥＲＦＲＯＭＴＨＥＴＥＲＭＩＮＡＬＣＨＲＯＭＯＰＨＯＲＥＯＦＰＯＬＹＥＴＨＥＲＴＯＥＵＲＯＰＩＵＭＣＡＴＩＯＮ（Ⅲ）ＶＩＡＣＯＭＰＬＥＸＡＴＩＯＮＥＮＨＡＮＣＥＭＥＮ... 详细信息

ＥＮＨＡＮＣＥＭＥＮＴＯＦＥＮＥＲＧＹＴＲＡＮＳＦＥＲＦＲＯＭＴＨＥＴＥＲＭＩＮＡＬＣＨＲＯＭＯＰＨＯＲＥＯＦＰＯＬＹＥＴＨＥＲＴＯＥＵＲＯＰＩＵＭＣＡＴＩＯＮ（Ⅲ）ＶＩＡＣＯＭＰＬＥＸＡＴＩＯＮＥＮＨＡＮＣＥＭＥＮＴＯＦＥＮＥＲＧＹＴＲＡＮＳＦＥＲ...

关键词： complexation polyether europium energy transfer

liver as a new target organ in Alzheimer's disease:insight from cholesterol metabolism and its role in amyloid-beta clearance

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Neural Regeneration Research 2025年第3期20卷 695-714页

作者： Beibei wu Yuqing liu Hongli li Lemei zhu lingfeng Zeng Zhen Zhang Weijun Peng Department of Integrated Traditional Chinese&Western Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Academician Workstation Changsha Medical UniversityChangshaHunan ProvinceChina Yangsheng College of Traditional Chinese Medicine Guizhou University of Traditional Chinese MedicineGuiyangGuizhou ProvinceChina Qinhuangdao Shanhaiguan Pharmaceutical Co. LtdQinhuangdaoHebei ProvinceChina National Clinical Research Center for Mental Disorder The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Alzheimer's disease,the primary cause of dementia,is characterized by neuropathologies,such as amyloid plaques,synaptic and neuronal degeneration,and neurofibrillary *** amyloid plaques are the primary characteristic of Alzheimer's disease in the central nervous system and peripheral organs,targeting amyloid-beta clearance in the central nervous system has shown limited clinical efficacy in Alzheimer's disease *** abnormalities are commonly observed in patients with Alzheimer's *** liver is the primary peripheral organ involved in amyloid-beta metabolism,playing a crucial role in the pathophysiology of Alzheimer's ***,impaired cholesterol metabolism in the liver may exacerbate the development of Alzheimer's *** this review,we explore the underlying causes of Alzheimer's disease and elucidate the role of the liver in amyloid-beta clearance and cholesterol ***,we propose that restoring normal cholesterol metabolism in the liver could represent a promising therapeutic strategy for addressing Alzheimer's disease.

关键词： ABCA1 Alzheimer's disease amyloid-beta apolipoprotein E cholesterol metabolism liver liver X receptor low-density lipoprotein receptor-related protein 1 peripheral clearance tauroursodeoxycholic acid

Modification of Maxwell model for conductivity prediction of carbon nanotubes-filled polymer composites with tunneling effect

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 25-36页

作者： Jue zhu Longyuan li Ningtao zhu Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline Key Laboratory of Impact and Safety Engineering (Ningbo University) Ministry of Education School of Engineering Computing and Mathematics University of Plymouth Xi'an Zhanshi Testing & Engineering Co.Ltd.

Carbon nanotubes(CNTs) have garnered great attention in recent years due to their outstanding electrical, thermal, and mechanical properties. The incorporation of small amounts of CNTs in polymers can substantially improve the sensitivity of the polymer's electrical conductivity. This paper presents a modified Maxwell model to evaluate the electrical conductivity of CNTs-filled polymer composites by introducing a transition zone to account for the tunneling effect. In this modified Maxwell model, the CNTs-filled polymer composite is modeled as a three-phase composite, consisting of a matrix(polymer), inclusions(CNTs), and a transition zone(tunneling zone). The effective electrical conductivity(EEC) of the composite is calculated based on the volume fractions and electrical conductivities of the matrix, inclusions, and transition zone. The model's validity is confirmed through the use of available test data, which demonstrates its capability to accurately capture the nonlinear conductivity behavior observed in CNTs-polymer composites. This study offers valuable insights into the design of high-performance conductive polymer nanocomposites, and enhances the understanding of electrical conduction mechanisms in CNT-dispersed polymer composites.

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