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Structure Design and Analysis of High-Voltage Power Supply for ECRH

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Plasma Science and Technology 2014年第11期16卷 1079-1082页

作者：王磊黄懿赟赵燕平张健杨磊郭文军 institute of Plasma Physics Chinese Academy of Sciences

In order to develop a high-voltage power supply （HVPS） with high quality parame- ters, not only its electrical circuit but also its structure should be studied in detail. In this paper, the structure design of the collector power supply for gyrotron is discussed first. Then the electri- cal field and potential simulations of its inain devices are analyzed. Finally, relevant calculations and conclusions are given.

关键词： ECRH HVPS structure design distributed capacitance

Preliminary Results of Ion Beam Extraction Tests on EAST Neutral Beam Injector

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Plasma Science and Technology 2012年第10期14卷 871-873页

作者：胡纯栋 institute of Plasma Physics Chinese Academy of Sciences

The neutral beam injection （NBI） system is one of the most important auxiliary plasma heating and current driving methods for fusion device. A high power ion beam of 3 MW with 80 keV beam energy in 0.5 s beam duration and a long pulse ion beam of 4 s with 50 keV beam energy ion beam extraction were achieved on the EAST neutral beam injector on the teststand. The preliminary results show that the EAST-NBI system was developed successfully on schedule.

关键词： NBI beam extraction ion source

Online Plasma Shape Reconstruction for EAST Tokamak

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Plasma Science and Technology 2010年第4期12卷 412-415页

作者：罗正平肖炳甲朱应飞杨飞 institute of Plasma Physics Chinese Academy of Sciences

An online plasma shape reconstruction, based on the offiine version of the EFIT code and MPI library, can be carried out between two adjacent shots in EAST. It combines online data acquisition, parallel calculation, and data storage together. The program on the master node of the cluster detects the termination of the discharge promptly, reads diagnostic data from the EAST mdsplus server on the completion of data storing, and writes the results onto the EFIT mdsplus server after the calculation is finished. These processes run automatically on a nine-nodes IBM blade center. The total time elapsed is about 1 second to several minutes, depending on the duration of the shot. With the results stored in the mdsplus server, it is convenient for operators and physicists to analyze the behavior of plasma using visualization tools.

关键词： online equilibrium reconstruction EAST tokamak parallel calculation

Expression of structural proteins of hepatitis C virus (HCV) in mammalian cells

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Science China(Life sciences) 1998年第1期41卷 47-55页

作者：李迎春李光地孔玉英汪垣王宇闻玉梅 1. Shanghai institute of Biochemistry Chinese Academy of Sciences 200031 Shanghai China 2. institute of Liver Disease Beijing Medical University 100044 Beijing China 3. Laboratory of medical Molecular Virology Ministry of Public Health Shanghai Medical University 200031 Shanghai China

The vaccinia viral vector containing T7 promoter was used to construct the expression plasmids carrying HCV structural genes of C, E1 and E2/NS1. These genes were transiently expressed in mammalian cells in the presence of the T7 RNA polymerase which was provided by the recombinant vaccinia virus vTT7. Expression of mature core protein, envelope protein E1 and E2 was detected by Western blot using HCV patient sera as the primary antibodies. It was found that the sera from different HCV patients reacted differently with the expressed products, so did the sera collected at different times from the same patient, from whom the HCV structural genes were isolated. Among six mammalian cell lines, Vero and HeLa were the most suitable for the expression of C, E1 and E2. The recombinant vaccinia viruses have been constructed to constantly produce the C, E1 and E2 proteins for further research.

关键词： hepatitis C virus core protein envelope protein recombinant vaccinia virus transient expression immunoblotting.

Design and Analysis of the Main AC/DC Converter System for ITER

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Plasma Science and Technology 2012年第4期14卷 338-342页

作者：盛志才许留伟傅鹏 institute of Plasma Physics Chinese Academy of Sciences

A design of the main AC/DC converter system for ITER is described and the configuration of the main AC/DC converters is presented. To reduce the reactive power absorbed from the converter units, the main AC/DC converters are designed to be series-connected and work in a sequential mode. The structure of the regulator of the converter system is described. A simulation model was built up for the PSCAD/EMTDC code, and the design was validated accordingly. Harmonic analysis and reactive power calculation of the converters units are presented. The results reveal the advantage of sequential control in reducing reactive power and harmonics.

关键词： AC/DC converter sequential control harmonic analysis reactive power reduction

The role of mesenchymal stem cell-derived exosomes in tumor progression

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BIOCELL 2023年第8期47卷 1757-1769页

作者： CARL RANDALL HARREL VALENTIN DJONOV ANA VOLAREVIC DRAGICA PAVLOVIC VLADISLAV VOLAREVIC Regenerative Processing Plant LLCFloridaUSA institute of Anatomy University of BernBernSwitzerland Department of Psychology Faculty of Medical SciencesUniversity of KragujevacKragujevacSerbia Department of Genetics Faculty of Medical SciencesUniversity of KragujevacKragujevacSerbia Department of Microbiology and Immunology Faculty of Medical SciencesUniversity of KragujevacKragujevacSerbia

Exosomes derived from mesenchymal stem cells(MSC-Exos)are nano-sized extracellular vesicles enriched with bioactive molecules,such as microRNAs,enzymes,cytokines,chemokines,immunomodulatory,trophic,and growth *** molecules regulate the survival,phenotype,and function of malignant and tumor-infiltrated immune *** to their nano-size and bilayer lipid envelope,MSC-Exos can easily bypass biological barriers and may serve as drug carriers to deliver chemotherapeutics directly into the tumor ***,we summarize current knowledge regarding molecular mechanisms responsible for MSC-Exos-dependent modulation of tumor progression and discuss insights regarding the therapeutic potential of MSC-Exos in the treatment of malignant diseases.

关键词： Mesenchymal stem cells Exosomes Immune response Therapy Malignant diseases

Novel TiC/Ti Open Cellular Foams Prepared by a Modified Sponge-coating Method Using High Frequency Induction Heating Process

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Journal of Materials Science & Technology 2013年第4期29卷 339-343页

作者： Yong Gao Xingxiang Xu Zhenming Yang Junqi Zhang Chunhai Jiang Jinsong Zhang institute of Metal Research Chinese Academy of Sciences

A new kind of open cellular foam material with three dimensionally interconnected TiC/Ti struts was prepared by a two-step sponge-coating and high frequency induction heating process. The microstructure, composition and compression strength of the prepared TiC/Ti foam materials were characterized. It was confirmed that the incorporation of Ti into TiC resulted in an inter-bonded Ti-TiC-Ti layered structure in the struts, which enhanced the plasticity of the composite foam materials.

关键词： TiC/Ti foams Composite Sintering Porosity Mechanical properties

Experimental verification of combinational-deformable-mirror for phase correction

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Chinese Optics Letters 2007年第10期5卷 559-562页

作者：刘桂林杨华峰饶长辉张雨东姜文汉 institute of Optics & Electronics Chinese Academy of Sciences

In adaptive optics （AO） system, the phase compensation capability is limited greatly by the actuator number of the deformable mirror （DM）. The actuator number of DM is mainly restricted by the manufacture techniques. The spatial correction capability of AO system can be improved by two or more combinational- DMs （CDMs） with conjugation relationship. The CDM AO system for wavefront correction is built, which consists of two 32-element DMs. The experimental results are in agreement with the numerical simulation results. It is indicated that the CDM AO system provides better correction performance than the single 32-element DM AO system.

关键词： Actuators Computer simulation Distortion (waves) Mirrors Wavefronts

Regulation of Leaf Senescence and Crop Genetic Improvement

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Journal of Integrative Plant Biology 2012年第12期54卷 936-952页

作者： Xiao-Yuan Wu Ben-Ke Kuai Ji-Zeng Jia Hai-Chun Jing The Key Laboratory of Plant Resources Institute of BotanyChinese Academy of Sciences State Key Laboratory of Genetic Engineering and institute of Plant Biology School of Life SciencesFudan University institute of Crop sciences Chinese Academy of Agricultural Sciences

Leaf senescence can impact crop production by either changing photosynthesis duration, or by modifying the nutrient remobiliza- tion efficiency and harvest index. The doubling of the grain yield in major cereals in the last 50 years was primarily achieved through the extension of photosynthesis duration and the increase in crop biomass partitioning, two things that are intrinsically coupled with leaf senescence. In this review, we consider the functionality of a leaf as a function of leaf age, and divide a leaf＇s life into three phases： the functionality increasing phase at the early growth stage, the full functionality phase, and the senescence and functionality decreasing phase. A genetic framework is proposed to describe gene actions at various checkpoints to regulate leaf development and senescence. Four categories of genes contribute to crop production： those which regulate （Ⅰ） the speed and transition of early leaf growth, （Ⅱ） photosynthesis rate, （Ⅲ） the onset and （Ⅳ） the progression of leaf senescence. Current advances in isolating and characterizing senescence regulatory genes are discussed in the leaf aging and crop production context. We argue that the breeding of crops with leaf senescence ideotypes should be an essential part of further crop genetic improvement.

关键词： Leaf Senescence photosynthesis and photoassimilates nutrient remobilisation senescence-associated genes crop ideotypes.