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A New Biphenyl Glycoside from the Leaves of Eriobotrya japonica

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Chinese Chemical Letters 2006年第1期17卷 35-37页

作者： li li JIANG li Jiang XUAN Shanghai Institute of Matefia Medica Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 201203

A new biphenyl glycoside along with six known compounds were isolated from the water soluble fraction of the fresh leaves of Eriobotrya japonica. Its structure was elucidated as 5,5＇-dihydroxy-3＇-methoxybiphenyl-2-O... 详细信息

关键词： Eriobotryajaponica biphenyl glycoside antifungal activity.

Characterization of Phase Transition in Heisenberg Fluids from Density Functional Theory

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Communications in Theoretical Physics 2009年第2期51卷 287-292页

作者： li liang-Sheng li li CHEN Xiao-Song Institute of Theoretical Physics Chinese Academy of Sciences P.O. Box 2735 Beijing 100190 China

The phase transition of Heisenberg fluid has been investigated with the density functional theory in mean-field approximation （MF）. The matrix of the second derivatives of the grand canonical potential Ω with respect to the particle density fluctuations and the magnetization fluctuations has been investigated and diagonalized. The smallest eigenvalue being 0 signalizes the phase instability and the related eigenvector characterizes this phase transition. We find a Curie line where the order parameter is pure magnetization and a spinodal where the order parameter is a mixture of particle density and magnetization. Along the spinodal, the character of phase instability changes continuously from predominant condensation to predominant ferromagnetic phase transition with the decrease of total density. The spinodal meets the Curie line at the critical endpoint with the reduced density p＊=pσ3=0.224 and the reduced temperature T＊ =kT/ε=1.87 （σ is the diameter of Heisenberg hard sphere and e is the coupling constant）.

关键词： critical phenomena order-disorder magnetic liquid

Robust synchronization of chaotic systems using sliding mode and feedback control

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第3期15卷 211-222页

作者： li-li li Ying liU Qi-guo YAO School of Naval Architecture and Ocean Engineering Zhejiang Ocean University Department of Information Science and Electronic Engineering Zhejiang University

We propose a robust scheme to achieve the synchronization of chaotic systems with modeling mismatches and parametric variations. The proposed algorithm combines high-order sliding mode and feedback control. The sliding mode is used to estimate the synchronization error between the master and the slave as well as its time derivatives, while feedback control is used to drive the slave track the master. The stability of the proposed design is proved theoretically, and its performance is verified by some numerical simulations. Compared with some existing synchronization algorithms, the proposed algorithm shows faster convergence and stronger robustness to system uncertainties.

关键词： Chaos synchronization Sliding mode Feedback control

Non-dimensional analysis of static bifurcation in a natural circulation loop

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Nuclear Science and Techniques 2006年第1期17卷 61-64页

作者： TONG li-li li Tian-Shu li Xiao-Yan Department of Nuclear Science and System Engineering Shanghai Jiaotong University Shanghai 200030 China

The steady-state characteristics of a two-phase natural circulation loop were investigated based on the homogenous model. Transcendental equations of non-dimensional loop mass flow rate under various conditions were also derived. The static bifurcation diagram of a two-phase natural circulation described with non-dimensional vari-ables Npch-m + was obtained. In addition, various steady-state characteristics of a natural circulation loop were ana-lyzed and discussed. These characteristics include the existence of multiple solutions under certain conditions, and the maximum mass flow rate. The authors also examined the effects of important parameters such as sub-cooling number, riser-to-heated-region length ratio, and riser-to-heated-region diameter ratio.

关键词：静态分歧自然循环回路双相自然循环非空间分析

Effect of alloying elements on magnesium alloy damping capacities at room temperature

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International Journal of Minerals,Metallurgy and Materials 2019年第6期26卷 760-765页

作者： Di-qing Wan Ying-lin Hu Shu-ting Ye Zhu-min li li-li li Yi Huang School of Materials Science and Engineering East China Jiaotong UniversityNanchang 330013China Materials Research Group Faculty of Engineering and the EnvironmentUniversity of SouthamptonSouthampton SO17 1 BJUK

Alloying is a good approach to increasing its strength but leads to a reduction of damping to pure *** the alloying characteristics of various alloying elements in magnesium alloys and their combined effects on the damping and mechanical properties of magnesium alloys is *** this paper,the properties of the Mg-0.6wt%X binary alloys were analyzed through strength measurements and dynamic mechanical *** effects of foreign atoms on solid-solution strengthening and dislocation damping were studied *** effect of solid solubility on damping capacity can be considered from two perspectives:the effect of single solid-solution atoms on the damping capacities of the alloy,and the effect of solubility on the damping capacities of the *** results provide significant information that is useful in developing high-strength,high-damping magnesium *** study will provide scientific guidance regarding the development of new types of damping magnesium alloys.

关键词： magnesium alloys high-damping high-strength alloying

Design, Syntheses and Biological Activities of Novel Anthranilic Diamide Insecticides Containing N-Pyridylpyrazole

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Chemical Research in Chinese Universities 2013年第1期29卷 51-56页

作者： ZHAO Yu li Yong-qiang XIONG li-xia XU li-ping PENG li-na li Fang li Zheng-ming National Pesticidal Engineering Centre(Tianjin) State Key Laboratory of Elemento-organic Chemistry Nankai University Tianjin 300071 P. R. China

In search of environmentally benign insecticides with high activity, low toxicity and low residue, a series of novel anthranilic diamide derivatives containing N-pyridylpyrazole was designed and synthesized. All the compounds were characterized by H NMR spectroscopy and elemental analysis. The single crystal structure of com pound 8j was determined by X-ray diffraction. The insecticidal activities of the new compounds were evaluated. The results show that some compounds exhibited moderate insecticidal activities against Lepidoptera pests. Among this series of compounds, compounds 80 and 8p showed 100% larvicidal activity against Mythimna separate Walker, Plutella xylostella linnaeus and Laphygma exigua Hubner at a test concentration of 200 mg/kg, which is equal to the commercial chlorantraniliprole.

关键词： Anthranilic diamide Ryanodine receptor Insecticidal activity

Bioactivated in vivo assembly(BIVA)peptide-tetraphenylethylene(TPE)probe with controllable assembled nanostructure for cell imaging

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Chinese Chemical Letters 2021年第6期32卷 1947-1952页

作者： Shizhao Lu Xiaoyan Guo Fangling Zhang Xiaodong li Meishuai Zou li-li li School of Material Science and Engineering Beijing Institute of TechnologyBeijing 100081China CAS Center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology(NCNST)University of Chinese Academy of SciencesBeijing 100190China

The emergence of fluorescent light-up molecular probe,which can specifically turn on their fluorescent in the presence of stimulation factors,has open up a new opportunity to advance biosensing and *** this work,we designed and synthesized a peptide-AIE conjugate probe for cell imaging with controlled in situ assembled *** modular designed probe is consisted of a selfassembled peptide-tetraphenylethene(TPE)motif,a fibroblast activation protein alpha(FAP-α)responsive motif,a hydrophilic motif and a targeting *** probe exhibits typically turn-on fluorescence property specifically triggered by FAP-α,which is a significant overexpressed membrane protein on pancreatic tumor ***,the peptide modified the TPE dramatically impacts the assembled nanostructure,which can be modulated by peptide *** a result,the peptide FF(PhePhe)modification of TPE as the self-assembled motif provides a suitable balance of the probe with lightup property and nanofiber assembled structure in ***,our probe could effectively detect the FAP-αon tumor cells with high ***,the nanofibers in situ assembled on the surface of CAFs enhanced the probe accumulation and prolonged the retention for cell *** envision that this study may inspire new insights into the design of nanostructure controlled AIE light-up bio-probe.

关键词： Peptide Self-assembly Tetraphenylethene(TPE) AIE Cell imaging

lipase-activated glycopeptide nano-assemblies as an antibiotic nano-adjuvant to inhibit Pseudomonas aeruginosa biofilm and enhance antibacterial activity

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Science China Chemistry 2022年第12期65卷 2538-2547页

作者： Yifei Song Jingkai Zhang Yue Fei Zhangjian Huang Xiaoxuan liu li-li li CAS Center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology(NCNST)Beijing100190China College of life Science and Technology Beijing University of Chemical TechnologyBeijing100029China State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases Center of Drug DiscoveryCenter of Advanced Pharmaceutics and BiomaterialsChina Pharmaceutical UniversityNanjing210009China

Bacterial infections,especially those caused by biofilms,pose a serious threat to public *** this work,we propose a glycopeptide-based antibiotic nano-adjuvant(GalAc-2) that can synergistically enhance the antibacterial activity of antibiotics through its biofilm inhibition *** glycopeptide nanoparticles can be specifically activated by bacterial infection overexpressed lipase and sequentially enlarged by glycosyl exposure on the *** stability and bonding affinity of the nanoparticles were enhanced through the increase in β-sheet *** bacterial growth inhibition rate of the mixture of levofloxacin(LEV) and GalAc-2 at 0.54 μg/m L was over sevenfold higher than that of LEV alone because of the electrostatic and multivalence Lec A interactions that inhibited biofilm formation on the bacterial ***,the mixture of the antibiotic with GalAc-2 significantly inhibited the abscess exposed to skin infection and significantly reduced the infiltration of immune *** believe that GalAc-2 can be further used to enhance broad-spectrum antibiotic sensitization and prolong the lifetime of antibiotics.

关键词： glycopeptide self-assembly antibiotic nano-adjuvant bacteria biofilm

Synthesis,Structure and Biological Activities of 2-(1H- 1,2,3-Benzotriazol-1-yl)-1-(4-methylphenyl)-2- (1H-1,2,4-triazol-1-yl)-1-ethanone

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Chemical Research in Chinese Universities 2006年第4期22卷 465-467页

作者： WAN Jun li Chun-li li Xue-mei ZHANG Shu-sheng College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China

The title compound was synthesized and characterized by IR, ^1H NMR, elemental analysis and single crystal X-ray diffraction analysis. Its biological activities were also tested. The results show that the title compound reveals inhibiting activities towards wheat gibberellin, apple ringspot, tomato early blight, peanut cercospora arachidicola and stem wilt of asparagus.

关键词： Triazole derivative Biological activity Crystal structure