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Effects of transplantation of microencapsulated rabbit sciatic nerve on nuclear factor-kappa B expression after spinal cord injury in rats

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Neural Regeneration Research 2009年第3期4卷 213-217页

作者： Xiaolian Wang Jianmin Ma hui chen Deming Liu Department of Human Anatomy Medical College of Nanchang University Nanchang 330006 Jiangxi Province China

BACKGROUND： It has been reported that nuclear factor-kappa B （NF- κB）, activated after spinal cord injury in rats, plays a key role in inflammatory responses in the central nervous system. OBJECTIVE： To investigate the effects of transplantation of microencapsulated rabbit sciatic nerve on NF- κB expression and motor function after spinal cord injury in rats, and to compare the results with the transplantation of rabbit sciatic nerve alone. DESIGN, TIME AND SETTING： This completely randomized, controlled study was performed at the Department of Neurobiology, Medical College of Nanchang University between December 2007 and July 2008. MATERIALS： A rabbit anti-NF- κB P65 monoclonal antibody was made by the Santa Cruz Company, USA and a streptavidin peroxidase immunohistochemical kit was provided by the Sequoia Company, China. METHODS： Eight rabbits were used to prepare a sciatic nerve cell suspension that was divided into two parts： one stored for transplantation, and the other mixed with a 1.5% sodium alginate solution. One hundred and twenty adult Sprague Dawley rats weighing 220-250 g were randomly divided into four groups： the microencapsulated cell group （n = 36）, the non-encapsulated cell group （n = 36）, the saline group （n = 36） and the sham operation group （n = 12）. The first three groups underwent a right hemisection injury of the spinal cord at the T10 level, into which was transplanted a gelatin sponge soaked with 10 μL of a microencapsulated nerve tissue/cell suspension （microencapsulated cell group）, a tissue/cell suspension （non-encapsulated cell group） or physiological saline （saline group）. In the sham operation group the vertebrae were exposed, but the spinal cord was not injured, and no implantation was given. MAIN OUTCOME MEASURES： Pathological changes were detected using hematoxylin-eosin staining; NF- κB expression was quantified using immunohistochemical staining; motor function was assessed using the Basso, Beattie and Bresnahan （BBB） scale. RESU

关键词： microcaosule: soinal cord iniurv: transolantation: nuclear factor-kappa B

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Retransmission in the network-coding-based packet network

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第7期11卷 544-554页

作者： Zheng WANG hui-fang chen Lei XIE Kuang WANG Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China Zhejiang Provincial Key Laboratory of Information Network Technology Hangzhou 310027 China

In this paper, retransmission strategies of the network-coding-based packet network are investigated. We propose two retransmission strategies, the packet-loss-edge-based retransmission strategy (PLERT) and the minimum retransmission strategy (MRT), which focus on optimizing the retransmission efficiency without the constraint on the encoding field size. We compared the performances of the proposed retransmission strategies with the traditional automatic repeat-request (ARQ) strategy and the random retransmission strategy. Simulation results showed that the PLERT strategy works well when the packet loss rate is small. Among these retransmission strategies, the performance of the MRT strategy is the best at the cost of the high complexity that is still polynomial. Furthermore, neither of the proposed strategies is sensitive to the encoding field size.

关键词： Generation Network coding Packet network Retransmission

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Atmospheric gaseous organic acids in winter in a rural site of the North China Plain

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Journal of Environmental Sciences 2022年第3期34卷 190-203页

作者： Xiaoyu Hu Gan Yang Yiliang Liu Yiqun Lu Yuwei Wang hui chen Jianmin chen Lin Wang Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP^(3)) Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China IRDR International Center of Excellence on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Fudan UniversityShanghai 200433China Collaborative Innovation Center of Climate Change Nanjing 210023China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Organic acids are important contributors to the acidity of atmospheric precipitation,but their existence in the Chinese atmosphere is largely *** this study,twelve atmospheric gaseous organic acids,including C_(1)-C_(9) alkanoic acids,methacrylic acid,pyruvic acid,and benzoic acid,were observed in the suburb of Wangdu,Hebei Province,a typical rural site in the northern China plain from 16^(th) December,2018 to 22^(nd) January,2019,using a Vocus■ Proton-Transfer-Reaction time-of-flight mass spectrometer(Vocus PTR-ToF).The quantification of C_(2)-C_(4) alkanoic acids by the Vocus PTR-ToF was calibrated according to the titration of a NaOH solution by C_(2)-C_(4) alkanoic acids from home-made permeation sources,and the other organic acids except for formic acid were quantified based on the k_(cap)-sensitivity linearity in the Vocus PTR-ToF,whereas formic acid was not quantified because our instrument setting led to a significant underestimation in its *** average total concentration of eleven gaseous organic acids was 6.96±5.20 ppbv(parts per billion by volume).The average concentration of acetic acid was the highest(3.86±3.00 ppbv),followed by propanoic acid,butyric acid,and methacrylic *** straw burning was likely the dominant source of the observed gaseous organic acids according to the good correlations between acetonitrile and organic acids and between particulate K+and organic acids,and traffic emissions could also have *** episodes with continuously high concentrations of organic acids,short-distance transport dominated in Wangdu according to the backward trajectory ***,Shijiazhuang,and Hengshui areas were the main source areas based on potential source contribution function and concentration weighing track analysis.

关键词： Gaseous organic acids Vocus PTR-ToF North China plain

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A target parameter estimation method via atom-reconstruction in radar mainlobe jamming

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Journal of Systems Engineering and Electronics 2024年第2期35卷 350-360页

作者： ZHOU Bilei LIU Weijian LI Rongfeng chen hui ZHANG Liang DU Qinglei LI Binbin chen Hao Air Force Early Warning Academy Wuhan 430019China Aerospace Nanhu Electronic Information Technology Co. Ltd.Jingzhou 434000China

Mainlobe jamming(MLJ)brings a big challenge for radar target detection,tracking,and *** suppression of MLJ is a hard task and an open problem in the electronic counter-counter measures(ECCM)*** parameters and target direction estimation is difficult in radar MLJ.A target parameter estimation method via atom-reconstruction in radar MLJ is proposed in this *** proposed method can suppress the MLJ and simultaneously provide high estimation accuracy of target range and ***,the eigen-projection matrix processing(EMP)algorithm is adopted to suppress the MLJ,and the target range is estimated effectively through the beamforming and pulse *** the target angle can be effectively estimated by the atom-reconstruction *** any prior knowledge,the MLJ can be canceled,and the angle estimation accuracy is well ***,the proposed method does not have strict requirement for radar array construction,and it can be applied for linear array and planar ***,the proposed method can effectively estimate the target azimuth and elevation simultaneously when the target azimuth(or elevation)equals to the jamming azimuth(or elevation),because the MLJ is suppressed in spatial plane dimension.

关键词： mainlobe jamming anti-jamming atom-reconstruction radar

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Carbon and oxygen isotopes suggesting deep-water basin deposition associated with hydrothermal events(Shangsi Section, Northwest Sichuan Basin-South China)

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Chinese Journal Of Geochemistry 2014年第1期33卷 77-85页

作者： chen hui XIE Xi'nong MAO Kainan HUANG Junhua Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education Faculty of Resources China University of Geosciences State Key Laboratory of Geological Processes and Mineral Resources Faculty of GeosciencesChina University of Geosciences

Carbon and oxygen isotope records for Shangsi Section in Northwest Sichuan Basin, South China can help investigating depositional environments and processes, including the burial rate and possible contribution of hydrothermal events. Samples from the lower Chihsian Formation show δ13CPDB and δ18OPDB values close to those of typical marine limestone. However, the overlying Permian middle-upper Chihsian, Wujiaping, and Maokou Formation samples reveal negative δ18OSMOW values and strong positive δ13CPDB values. These indicate high biological productivity and rapid burial of organic carbon. Samples from the Dalong Formation present both negative δ13CPDB and negative δ18OPDB values, which are quite different from the underlying Permian strata. These abnormal carbon and oxygen isotope characteristics in the Dalong Formation may suggest that hydrothermal processes contributed to deposition.

关键词：氧同位素记录盆地沉积四川盆地有机碳西北部热液活动中国二叠纪地层

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A New Gluing Recursive Relation for Linear Sigma Model of P^1-orbifold

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Acta Mathematica Sinica,English Series 2013年第9期29卷 1757-1772页

作者： Xiao Bin LI Bo hui chen cheng Yong DU Department of Mathematics Sichuan University Chengdu 610064 P. R. China Department of Mathematics Southwestern Jiaotong University Department of Mathematics and Yangtze Mathematical Center Sichuan University Department of Mathematics Sichuan University

The study of the moduli space plays an important role in classical enumerative geometry and its interaction with string theory in physics. Given X=[P1/Zr] and let x＇ = （[0]a , [∞]b） the 2-tuple of twisted sectors on X , we construct in this paper two different compactifications of the moduli space M0,2（X, d[P1/Zr], x＇）： Nonlinear Sigma Model Mx＇d and Linear Sigma Model Nx＇d . Relations between Mx＇d and Nx＇d are studied and a new gluing recursive relation on Nx＇d is derived from Mx＇d due to virtual localization formula.

关键词： Orbifold Gromov–Witten invariant nonlinear (linear) Sigma model orbi-gluing recursive relation

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Scalable connection-based flow control scheme for application-specific network-on-chip

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The Journal of China Universities of Posts and Telecommunications 2011年第6期18卷 98-105页

作者： LIN Shi-jun SHI Jiang-hong chen hui-huang School of Information Science and Technology Xiamen University Xiamen 361005 China

In this paper, a scalable connection-based flow control scheme is proposed for application-specific network-on-chip （NoC）. The proposed scheme exploits two distinctive characteristics of NoC, namely traffic predictability and abundant wire resource, to achieve significant performance enhancements. First, the burst injection data are regulated into constant data streams and a connection-based method is used to ensure that all links are not overloaded at any time. Consequently, the number of packets in the network is decreased, leading to a reduced congestion probability and improved communication performance. Second, a simple architecture of the central controller is proposed to guarantee that the proposed scheme has small area overhead and is scalable. Simulation results show that compared with traditional switch-to-switch （STS） flow control scheme and pre-allocation based flow control schemes, the proposed scheme greatly increases the throughput and cuts down the average latency with reasonable area and energy overhead.

关键词： network-on-chip (NoC) system-on-chip (SoC) flow control

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Synthesis and Crystal Structure of a One-dimensional Azido-bridged Manganese (II) Compound [Mn(N_3)_2(H_2O)_3·C_6H_(12)N_4]_n

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Chinese Journal of Structural Chemistry 2006年第2期25卷 135-138页

作者： chen hui WANG Wen-Guo ZHANG Xiao-Feng chen Chang-Neng LIU Qiu-Tian State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A new one-dimensional azido-bridged manganese compound has been prepared and structurally characterized by X-ray diffraction. The complex [Mn（N3）2（H2O）3·C6H12N4]n crystallizes in space group Pnma with a = 6.5252 （5）, b = 9.3226（7）, c = 22.2070（15） ,A°, V= 1350.89（17） ,A°^3, Z = 4, Mr = 333.24, Dc = 1.639 g/cm^3, μ = 1.005 mm^-1 and F（000） = 692. The final refinement gave R = 0.0328 and wR = 0.0777 for 1085 observed reflections with I 〉 2σ（I）. The structure contains [Mn（N3）2（H2O）3]n polymeric chains and uncoordinated hexamethylenetetramine （HMTA） molecules with Mn/HMTA molar ratio of 1：1. The Mn atoms are bridged by end-to-end azido ligands to construct one-dimensional zig-zag infinite chains. Each Mn atom is six-coordinated by three N atoms of three azido ligands and three water O atoms, resulting in an octahedral geometry. Extending hydrogenbonding interactions involving water O atoms, azido and HMTA N atoms link the chains and HMTA molecules into a three-dimensional network.

关键词： manganese crystal structure azide coordination polymer

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Exotic ΩΩ dibaryon states in a molecular picture

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Chinese Physics C 2021年第4期45卷 6-13页

作者： Xiao-hui chen Qi-Nan Wang Wei chen Hua-Xing chen School of Physics Sun Yat-Sen UniversityGuangzhou 510275China School of Physics Southeast UniversityNanjing 210094China

We investigate the exotic ΩΩ dibaryon states with J^(P)=0^(+)and 2^(+)in a molecular *** construct a tensorΩΩmolecular interpolating current and calculate the two-point correlation function within the method of QCD sum *** calculations indicate that the masses of the scalar and tensor dibaryon states are mΩΩ,0^(+)=(3.33±0.51)GeV and mΩΩ,2^(+)=(3.15±0.33)GieV,respectively,which are below the 2mΩ*** error,these results do not negate the existence of loosely bound molecularΩΩdibaryon *** exotic strangeness S=-6 and doubly-chargedΩΩdibaryons,if they exist,may be identified in heavy-ion collision processes in the fu-ture.

关键词： QCD sum rules molecular state dibaryon

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Adaptable Phosphate Networks towards Robust,Reprocessable,Weldable,and Alertable-Yet-Extinguishable Epoxy Vitrimer

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Research 2023年第1期2022卷 219-230页

作者： Jia-hui Lu Zhen Li Jia-hui chen Shu-Liang Li Jie-Hao He Song Gu Bo-Wen Liu Li chen Yu-Zhong Wang School of Chemical Engineering The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE)National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610064China

Covalent adaptable networks(CANs)combine the uniqueness of thermoplastics and thermosets to allow for reprocessability while being covalently ***,it is highly desirable but rarely achieved for CANs to simultaneously demonstrate reversibility and mechanical ***,we report a feasible strategy to develop a novel epoxy vitrimer(EV)composed of adaptable phosphate networks(APNs),by which the EVs exhibit promising mechanical properties(tensile strength of 62.5~87.8 MPa and tensile modulus of 1360.1~2975.3 MPa)under ambient *** elevated temperatures,the topology rearrangement occurs relied on phosphate transesterification,which contributes to the shape memory performance,selfhealing,reprocessing,and welding ***,the incorporation of APNs allows for improvements in anti-ignition and also the inhibition of both heat release and smoke generation to avoid empyrosis,asphyxiation,and toxication during burning,showing expected intrinsic fire ***,mechanical properties,and flame retardancy of the reprocessed EVs after hot pressing are very close to those of the original EVs,which is attributed to the suficient reversibility of ***,combining the aforementioned features,EVs are manufactured as flame-triggered switches for fire alarms,which symbolizes the innovative development of high-performance covalent adaptable polymeric materials.

关键词： process smoke mentioned

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