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L^q Interior Estimates of the Gradient for Weak Solutions of Quasilinear Elliptic Equations

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Acta Mathematica Sinica,English Series 2007年第12期23卷 2225-2234页

作者： Feng Ping YAO yong yong cai LMAM School of Mathematical Sciences Peking University Bering 100871 P. R. China

The authors present a new proof of L^q interior estimates of the gradient for weak solutions of a quasilinear elliptic equation of p-Laplacian type.

关键词： L^q interior estimates weak solutions quasilinear elliptic maximal function

Thiolated arsenicals in arsenic metabolism: Occurrence,formation, and biological implications

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Journal of Environmental Sciences 2016年第11期28卷 59-73页

作者： Yuzhen Sun Guangliang Liu yong cai Institute of Environment and Health Jianghan University Department of Chemistry and Biochemistry&Southeast Environmental Research Center Florida International University

Arsenic（As） is a notoriously toxic pollutant of health concern worldwide with potential risk of cancer induction, but meanwhile it is used as medicines for the treatment of different conditions including hematological cancers. Arsenic can undergo extensive metabolism in biological systems, and both toxicological and therapeutic effects of arsenic compounds are closely related to their metabolism. Recent studies have identified methylated thioarsenicals as a new class of arsenic metabolites in biological systems after exposure of inorganic and organic arsenicals, including arsenite, dimethylarsinic acid（DMAV）, dimethylarsinous glutathione（DMAIIIGS）, and arsenosugars. The increasing detection of thiolated arsenicals,including monomethylmonothioarsonic acid（MMMTAV）, dimethylmonothioarsinic acid（DMMTAV） and its glutathione conjugate（DMMTAVGS）, and dimethyldithioarsinic acid（DMDTAV） suggests that thioarsenicals may be important metabolites and play important roles in arsenic toxicity and therapeutic effects. Here we summarized the reported occurrence of thioarsenicals in biological systems, the possible formation pathways of thioarsenicals, and their toxicity, and discussed the biological implications of thioarsenicals on arsenic metabolism, toxicity, and therapeutic effects.

关键词： Arsenic Thioarsenicals Occurrence Formation pathways Toxicity

Mobility of toxic metals in sediments: Assessing methods and controlling factors

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Journal of Environmental Sciences 2015年第5期27卷 203-205页

作者： Yanbin Li yong cai Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology Ocean University of China College of Chemistry and Chemical Engineering Ocean University of China Institute of Environment and Health Jianghan University Department of Chemistry & Biochemistry and Southeast Environmental Research Center Florida International University

Metals and metalloids（termed as metals in this article）are important constituent elements of the earth＇s crust.A number of metals,if present in excess,are toxic to organisms and therefore they are usually defined a... 详细信息

关键词： Mobility of toxic metals in sediments Assessing methods and controlling factors

Global Smooth Solutions to Relativistic Euler-Poisson Equations with Repulsive Force

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Acta Mathematicae Applicatae Sinica 2014年第4期30卷 1025-1036页

作者： yong-cai GENG Lei WANG Department of Mathematics Shanghai Institute of Technology Wuxi Teachers' College

In this paper, we are concerned with the global existence of smooth solutions for the one dimen- sional relativistic Euler-Poisson equations： Combining certain physical background, the relativistic Euler-Poisson model is derived mathematically. By using an invariant of Lax＇s method, we will give a sufficient condition for the existence of a global smooth solution to the one-dimensional Euler-Poisson equations with repulsive force.

关键词： relativistic Euler equations relativistic Euler-poisson equations global existence characteristic-based method

The ground deformation field induced by a listric thrust fault with an overburden soil layer

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Frontiers of Earth Science 2013年第4期7卷 501-507页

作者： Shaogang ZENG yong'en cai Department of Geophysics Peking University Beijing 100871 China

The surface deformation field induced by a listric thrust fault with a thick, overburden soil layer is studied in this paper by the finite element method （FEM）. The results show：（a） The maximum slip induced by the buried fault is not located at upper tip of the fault, but below it. （b） The vertical displacement changes remarkably near the fault, forming a fault scarp. With the increase of the soil layer thickness, the height of the scarp is decreased for the same earthquake magnitude. （c） The strong strain zone on the surface is localized near the projection of the fault tip on the ground surface. The horizontal strains in the zone are in tension above the hanging wall and in compression above the foot wall, and the vertical strains in the zone are vice versa, which is favorable for tensile- shear, compression-shear fissures above hanging wall and foot wall, respectively.

关键词： listric thrust fault earthquake fault scarps,ground fissures finite element method (FEM)

Progress in the study of mercury methylation and demethylation in aquatic environments

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Chinese Science Bulletin 2013年第2期58卷 177-185页

作者： LI YanBin cai yong Department of Chemistry & Biochemistry Southeast Environmental Research CenterFlorida International University

Mercury(Hg) and its compounds are a class of highly toxic and pervasive *** the biogeochemical cycling of Hg,methylmercury(MeHg),a potent neurotoxin,can be produced and subsequently bioaccumulated along the food chain in aquatic *** is among the most widespread contaminants that pose severe health risks to humans and *** of inorganic mercury to MeHg and demethylation of MeHg are the two most important processes in the cycling of MeHg,determining the levels of MeHg in aquatic *** paper reviews recent progress on the study of Hg methylation and demethylation in aquatic environments,focusing on the following three areas:(1) sites and pathways of Hg methylation and demethylation,(2) bioavailability of Hg species for methylation and demethylation,and(3) application of isotope addition techniques in quantitatively estimating the net production of MeHg.

关键词：去甲基化水生环境甲基汞生物地球化学水生生态系统循环过程生物利用度神经毒素

Heterointerface Engineering-Induced Oxygen Defects for the Manganese Dissolution Inhibition in Aqueous Zinc Ion Batteries

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Energy & Environmental Materials 2024年第3期7卷 112-122页

作者： Wentao Qu yong cai Baohui Chen Ming Zhang Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics&Devices School of Physics and ElectronicsHunan UniversityChangsha 410082China Engineering Research Center of Advanced Semiconductor Technology and Application of Ministry of Education&Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education College of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China Changsha Semiconductor Technology and Application Innovation Research Institute College of Semiconductors(College of Integrated Circuits)Hunan UniversityChangsha 410082China State Key Laboratory of Disaster Prevention&Reduction for Power Grid Transmission and Distribution Equipment(Hunan Electric Power Corporation Disaster Prevention and Reduction Center) Changsha 410007China

Manganese-based material is a prospective cathode material for aqueous zinc ion batteries(ZIBs)by virtue of its high theoretical capacity,high operating voltage,and low ***,the manganese dissolution during the electrochemical reaction causes its electrochemical cycling stability to be *** this work,heterointerface engineering-induced oxygen defects are introduced into heterostructure MnO_(2)(δa-MnO_(2))by in situ electrochemical activation to inhibit manganese dissolution for aqueous zinc ion ***,the heterointerface between the disordered amorphous and the crystalline MnO_(2)ofδa-MnO_(2)is decisive for the formation of oxygen *** the experimental results indicate that the manganese dissolution ofδa-MnO_(2)is considerably inhibited during the charge/discharge *** analysis indicates that the oxygen defect regulates the electronic and band structure and the Mn-O bonding state of the electrode material,thereby promoting electron transport kinetics as well as inhibiting Mn ***,the capacity ofδa-MnO_(2)does not degrade after 100 cycles at a current density of 0.5 Ag^(-1)and also 91%capacity retention after 500cycles at 1 Ag^(-1).This study provides a promising insight into the development of high-performance manganese-based cathode materials through a facile and low-cost strategy.

关键词： electrochemical activation heterointerface manganese dissolution inhibition oxygen defects zinc ion batteries

Potential coordination role between O-GIcNAcylation and epigenetics

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Protein & Cell 2017年第10期8卷 713-723页

作者： Donglu Wu yong cai Jingji Jin School of Life Sciences Jilin University Changchun 130012 China National Engineering Laboratory for AIDS Vaccine Jilin University Changchun 130012 China Key Laboratory for Molecular Enzymology and Engineering The Ministry of Education Jilin University Changchun 130012 China

Dynamic changes of the post-translational O-GIcNAc modification （O-GIcNAcylation） are controlled by O-linked β-N-acetylglucosamine （O-GIcNAc） transferase （OGT） and the glycoside hydrolase O-GIcNAcase （OGA） in cells. O-GIcNAcylation often occurs on serine （Ser） and threonine （Thr） residues of the specific substrate proteins via the addition of O-GIcNAc group by OGT. It has been known that O-GIcNAcylation is not only involved in many fundamental cellular processes, but also plays an important role in cancer development through various mechanisms. Recently, accumulating data reveal that O-GIcNAcylation at histones or non-histone proteins can lead to the start of the subsequent biological processes, suggesting that O-GIcNAcylation as ＇protein code＇ or ＇histone code＇ may provide recognition platforms or executive instructions for subse- quent recruitment of proteins to carry out the specific functions. In this review, we summarize the interaction of O-GIcNAcylation and epigenetic changes, introduce recent research findings that link crosstalk between O- GIcNAcylation and epigenetic changes, and speculate on the potential coordination role of O-GIcNAcylation with epigenetic changes in intracellular biological processes.

关键词： O-GIcNAcylation post-translationa modification histone modification epigenetics

Refining mercury emission estimations to the atmosphere from iron and steel production

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Journal of Environmental Sciences 2016年第5期28卷 1-3页

作者： yongmin Wang Guangliang Liu Dingyong Wang yong cai College of Resource and Environment Southwest University Institute of Environment and Health Jianghan University Department of Chemistry and Biochemistry Southeast Environmental Research Center Florida International University

Due to its long-range transport in the atmosphere,mercury is a pollutant of global concern with health risks to humans and ecosystems worldwide（Li et al.,2012;Lindqvist et al.,1991;Liu et al.,2012a;Tang et al.,2016;Wang et al.,2015;Shao et al.,2016）.Atmospheric mercury,mainly from emission from various natural and anthropogenic sources and re-emission of previously released mercury built up in surface soils and oceans,

关键词： Mercury Emission Iron and steel production Anthropogenic sources