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Ethylene Polymerization and Copolymerization with Polar Monomers by Benzothiophene-bridged BPMO-Pd Catalysts

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Chinese Journal of Polymer Science 2020年第6期38卷 579-586页

作者： Hong-Liang Mu Jun-Hao Ye Guang-Lin Zhou kang-kang Li Zhong-bao Jian State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

A series of new bisphosphine-monoxide(BPMO)ligands based on benzothiophene backbone and the corresponding palladium complexes{k2-P(O)(Ph)2-3-PR1R2-C8H4S}PdMeCl{2a:R1=R2=Ph;2b:R1=R2=2-0Me-Ph;2c:R1=R2=2-CF3-Ph;2d:Rl=Ph,R2=2-(2',6'-(OMe)2C6Hz)-C6H4}were synthesized and fully characterized by1H-,13C-,31P-,and 2D-NMR spectroscopy and single-crystal X-ray *** the presence of Na+B[3,5-(CF3)2C6H3]4(NaBArF),these complexes showed very high activities(up to 2.0 x 10’g-mol-1.h-)for ethylene *** significantly,these catalysts enabled the copolymerization of ethylene with a broad scope of commercially available polar comonomers such as acrylates,acrylic acid,acrylonitrile,vinyltrialkoxysilane,allyl acetate,and long-chain 6-chloro-1-hexene to give functionalized polyethylene with reasonable catalytic activities(up to 105 g-mol-l.h-)and incorporations(up to 5.3 mol96).This contribution suggests that,besides the modulation of conventionally steric and electronic factors,the connectivity(at dfferent linking positions)of BPMO(P,O)donors to the heteroaryl backbone also greatly infuences the catalyst properties in terms of catalytic activity,polymer branching content,comonomer scope,and comonomer incorporation.

关键词： Olefin polymerization Bisphosphine monoxide Plladium Polar monomers Heteroaryl backbone

High-affinity T cell receptors redirect cytokine-activated T cells (CAT) to kill cancer cells

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Frontiers of Medicine 2019年第1期13卷 69-82页

作者： Synat kang Yanyan Li Yifeng bao Yi Li State Key Laboratory of Respiratory Disease Guangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhou 510530China University of Chinese Academy of Sciences Beijing 100049China

Cytokine-activated T cells (CATs) can be easily expanded and are widely applied to cancer immunotherapy. However, the good efficacy of CATs is rarely reported in clinical applications because CATs have no or very low antigen specificity. The low-efficacy problem can be resolved using T cell antigen receptorengineered CAT (TCR-CAT). Herein, we demonstrate that NY-ESO-1157-165 HLA-A*02:01-specific high-affinity TCR (HAT)-transduced CATs can specifically kill cancer cells with good efficacy. With low micromolar range dissociation equilibrium constants, HAT-transduced CATs showed good specificity with no off-target killing. Furthermore, the high-affinity TCR-CATs delivered significantly better activation and cytotoxicity than the equivalent TCR-engineered T cells (TCR-Ts) in terms of interferon-γ and granzyme B production and in vitro cancer cell killing ability. TCR-CAT may be a very good alternative to the expensive TCR-T, which is considered an effective personalized cyto-immunotherapy.

关键词： cytokine-activated T cells high-affinity T cell receptor cancer immunotherapy TCR-CAT

Highly enantioselective construction of CF_(3) -bearing all-carbon quaternary stereocenters: Chiral spiro-fused bisoxazoline ligands with 1,1'-binaphthyl sidearm for asymmetric Michael-type Friedel-Crafts reaction

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Chinese Chemical Letters 2022年第5期33卷 2415-2419页

作者： Robert Li-Yuan bao Lei Shi kang Fu School of Science Harbin Institute of TechnologyShenzhen 518055China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and TechnologyShenzhen 518055China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China

A novel class of chiral spiro-fused bisoxazoline ligands possessing a deep chiral pocket was *** developed ligands have been employed in the nickel-catalyzed highly enantioselective Michael-type Friedel-Crafts reaction, affording the products bearing a trifluoromethylated all-carbon quaternary stereocenter with moderate to excellent yields(up to 99%) and good to excellent enantioselectivies(up to> 99.9% ee). Moreover, a proposed model of chiral pocket revealed that the attack of indole from the Re-face of β-CF_(3)-β-disubstituted nitroalkene was favorable.

关键词： Chiral bisoxazoline ligand Chiral pocket Chiral spiro ligand Friedel-Crafts reaction Trifluoromethylated all-carbon quaternary stereocenter

High performance Sm-Co powders obtained by crystallization from ball milled amorphous state

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Journal of Materials Science & Technology 2020年第2期37卷 181-184页

作者： Jinkui Fan Qiang Zheng Rui bao Jianhong Yi juan Du Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China School of Materials and Chemical Engineering Ningbo University of TechnologyNingbo315211China Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of Sciences1219 Zhongguan West RoadNingbo 315201China

Isotropic Sm-Co nanoparticle powders with high coercivity were prepared by high-energy ball milling followed by optimal annealing at different *** covercivity increased monotonically with increasing of the annealing temperature and a highest coercivity of 31.2 kOe was *** sample with an optimal energy product of 17.0 MGOe still had a coercivity of 18.2 *** evolution of phase,particle size,mechanism of coercivity and other related magnetic properties were *** excellent performance is attributed to nanoscale size grains below 15 nm and good exchange coupling between nanoparticles.

关键词： Sm-Co Nanoparticles High-energy ball milling Post-annealing Coercivity

A Two Sample Test based on U-statistic for Functional Data

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Acta Mathematica Sinica,English Series 2023年第3期39卷 533-552页

作者： Wen juan HU Liang WANG bao Xue ZHANG Guo Chang WANG School of Statistics Capital University of Economics and BusinessBeijing 100070P.R.China School of Mathematics and Statistics Northeast Normal UniversityChangchun 130024P.R.China School of Economics Jinan UniversityGuangzhou 510632P.R.China

We propose a two-sample test for the mean functions of functional data when the number of bases is much lager than the sample *** novel test is based on U-statistics which avoids estimating the covariance operator accurately under the high dimensional *** further prove the asymptotic normality of our test statistic under both null hypothesis and a local alternative *** extensive simulation study is presented which shows that the proposed test works well in comparison with several other methods under the high dimensional *** application to egg-laying trajectories of Mediterranean fruit flies data set demonstrates the applicability of the method.

关键词： Mean test functional data U-statistics two sample

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Intelligent casting:Empowering the future foundry industry

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China Foundry 2024年第5期21卷 409-426页

作者： Jin-wu kang bao-lin Liu Tao Jing Hou-fa Shen School of Materials Science and Engineering Key Laboratory for Advanced Materials Processing TechnologyTsinghua UniversityBeijing 100084China

Emerging technological advances are reshaping the casting sector in latest *** technology is evolving towards intelligent casting paradigm that involves automation,greenization and intelligentization,which attracts more and more attention from the academic and industry *** this paper,the main features of casting technology were briefly summarized and forecasted,and the recent developments of key technologies and the innovative efforts made in promoting intelligent casting process were ***,the technical visions of intelligent casting process were also put *** key technologies for intelligent casting process comprise 3D printing technologies,intelligent mold technologies and intelligent process control *** future,the intelligent mold that derived from mold with sensors,control devices and actuators will probably incorporate the Internet of Things,online inspection,embedded simulation,decision-making and control system,and other technologies to form intelligent cyber-physical casting system,which may pave the way to realize intelligent *** is promising that the intelligent casting process will eventually achieve the goal of real-time process optimization and full-scale control,with the defects,microstructure,performance,and service life of the fabricated castings can be accurately predicted and tailored.

关键词： intelligent casting 3D printing intelligent mold process control cyber-physical casting system embedded simulation

Low Trichorhinophalangeal Syndrome 1 Gene Transcript Levels in Basal-like Breast Cancer Associate with Mesenchymal-to-epithelial Transition

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Chinese Medical Sciences Journal 2013年第3期28卷 129-134页

作者： Yi bao Ling-juan Ruan juan-fen Mo Key Laboratory Jiaxing Second Hospital Jiaxing University

Objective To investigate trichorhinophalangeal syndrome 1 gene （TRPS-1） expression patterns in different subtypes of breast cancer and its correlations with other genes and survival using microarray data sets. Methods The transcripts of TRPS-1 and its role in survival in breast cancer were analyzed using published microarray data sets-Netherlands Cancer Institute （NKI） cohort and Wang cohort.

关键词： ductal epithelial cells trichorhinophalangeal syndrome 1 gene Slug epithelial mesenchymal transition breast cancer

A New Sequential Systems of Linear Equations Algorithm of Feasible Descent for Inequality Constrained Optimization

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Acta Mathematica Sinica,English Series 2010年第12期26卷 2399-2420页

作者： Jin bao JIAN Dao Lan HAN Qing juan XU College of Mathematics and Infornation Science Guangxi University Nanning 530004 P. R. China College of Mathematics and Computer Science Guangxi University for NationalitiesNanning 530006 P. R. China College of Electrical Engineering Guangxi University Nanning 530004 P. R. China Department of Mathematics Shanghai University Shanghai 200444 P. R. China College of Mathematical Science Guangxi Teachers Education University Nanning 530001 P. R. China

Based on a new efficient identification technique of active constraints introduced in this paper, a new sequential systems of linear equations （SSLE） algorithm generating feasible iterates is proposed for solving nonlinear optimization problems with inequality constraints. In this paper, we introduce a new technique for constructing the system of linear equations, which recurs to a perturbation for the gradients of the constraint functions. At each iteration of the new algorithm, a feasible descent direction is obtained by solving only one system of linear equations without doing convex combination. To ensure the global convergence and avoid the Maratos effect, the algorithm needs to solve two additional reduced systems of linear equations with the same coefficient matrix after finite iterations. The proposed algorithm is proved to be globally and superlinearly convergent under some mild conditions. What distinguishes this algorithm from the previous feasible SSLE algorithms is that an improving direction is obtained easily and the computation cost of generating a new iterate is reduced. Finally, a preliminary implementation has been tested.

关键词： Inequality constraints nonlinear optimization systems of linear equations global conver-gence superlinear convergence

Searching for Odderon with ^-pp and pp Elastic Scattering at High Energies

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Communications in Theoretical Physics 2007年第3X期48卷 519-524页

作者： ZHOU Li-juan LIU bao-Rong MA Wei-Xing Collaboration Group of Hadron Physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China Department of Physics Guangxi University Nanning 530004 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China

Based on the assumption that the Pomeron is a sum of Regge multipoles, each of which corresponds to a finite gluon ladder, we suggest a way to search the Odderon by studying the diffractive processes of ^-pp and pp elastic scattering. From our theoretical calculations and fits to the corresponding experimental data at high energies and all available momentum transfer, we find that the Odderon plays a significant role in the description of differential cross section dσ/ dt in the whole experimental domain. Accordingly, we can claim that the ^-pp and pp diffractive processes at high energies s and moderate momentum transfer t could be a good tool to search for Odderon and to test QCD since the processes are purely non-perturbative QCD phenomena. Therefore, the experimental measurements are urgently demanded.

关键词： Odderon diffractive processes non-perturbative QCD