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Molecular Plant 2013年第3期6卷 887-904页

作者： xiao-yi zhou li song hong-wei xue National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 300 Fenglin Road 200032 Shanghai China

Brassinosteroids （BRs） are an important class of phytohormones which regulates a wide range of physiological processes. Genetic and physiological studies have revealed that BR responses usually depend on an intact auxin signaling pathway. Here, we demonstrate that high BR concentration or enhanced BR signaling induce the differential growth of etiolated hypocotyls and result in the morphological changes, while auxin-resistant mutants, msg2 （dominant mutant of IAA19） and arf7, are insensitive to the BR effect and can partially suppress the phenotype of bzrl-D （dominant mutant of BZR1 with enhanced BR signaling）. Interestingly, BZR1 protein can directly bind to the promoter regions of both IAA19 and ARFT, indicating that IAA19 and ARF7 mediate the BR-induced differential growth by serving as direct targets of BZR1. Systemic microarray analysis revealed that a number of BR-responsive genes showed reduced BR response in msg2, confirming that BR employs auxin signaling components IAA19 and ARF7 to modulate the specific downstream processes. These results provide informative clues on the crosstalk of BR-auxin signaling and the mechanisms of BR-auxin effects in regulating differential growth.

关键词： brassinosteroids (BRs) auxin IAA19 ARF7 differential growth Arabidopsis.

Distinctive Polymorphism-like Isodimorphism in Poly(propylene succinate-ran-propylene fumarate)

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Chinese Journal of Polymer Science 2022年第6期40卷 602-610页

作者： xue-wei wei Xin-Xin Zhao yi li xiao-Yu Meng Qiong zhou Hai-Mu Ye Department of Materials Science and Engineering College of New Energy and MaterialsChina University of PetroleumBeijing 102249China

Co-crystallization of different monomeric units fundamentally contributes to the versatile and tunable performance of random *** present,the crystallization manners of random binary copolymers have been divided into three categories:isomorphism,isodimorphism and comonomer *** category,however,has its own advantages and ***,it is challenging to design and prepare random copolymer sharing the advantages of isomorphism and isodimorphism through a new co-crystallization manner beyond the ones already *** the basis of previous study on poly(alkylene succinate-ran-alkylene fumarate)whose co-crystallization can be extensively and finely regulated by simply varying the chemical structure of alkylene,random copolymers of poly(propylene succinate-ranpropylene fumarate)(PPSF)are synthesized using 1,3-propanediol as the diol *** thermal properties and crystal structure of PPSF are investigated,and,intriguingly,it is proved that PPSF is an isodimorphism system while displays similar composition-dependent thermal properties and crystallinity as *** is,PPSF exhibits a novel co-crystallization behavior that has rarely been discovered,which would combine the advantages of both isomorphism and ***,PPSF could be termed as a new-type,special compositiondependent ***,the altering of PPS-like to PPF-like crystal structure of PPSF when changing chain composition has been proved to originate from the shift of dominant inter-segment interaction from van der Waals forces to strong hydrogen-bonding *** work enriches the co-crystallization manner of random copolymers,leading to more diverse performance design of polymer materials.

关键词： Co-crystallization Random copolymer Isodimorphism Inter-segment interaction

Genome-Wide Analysis Regulatory Network of Photomorphogenesis Revealed the Complex Brassinosteroid Effects in

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Molecular Plant 2009年第4期2卷 755-772页

作者： li song xiao-yi zhou li li liang-Jiao xue Xi Yang hong-wei xue National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences 300 Fenglin Road 200032 Shanghai China

light and brassinosteroids （BRs） have been proved to be crucial in regulating plant growth and development; however, the mechanism of how they synergistically function is still largely unknown. To explore the underlying mechanisms in photomorphogenesis, genome-wide analyses were carried out through examining the gene expressions of the dark-grown WT or BR biosynthesis-defective mutant det2 seedlings in the presence of light stimuli or exogenous Brassinolide （BL）. Results showed that BR deficiency stimulates, while BL treatment suppresses, the expressions of lightresponsive genes and photomorphogenesis, confirming the negative effects of BR in photomorphogenesis. This is consistent with the specific effects of BR on the expression of genes involved in cell wall modification, cellular metabolism and energy utilization during dark-light transition. Further analysis revealed that hormone biosynthesis and signaling-related genes, especially those of auxin, were altered under BL treatment or light stimuli, indicating that BR may modulate photomorphogenesis through synergetic regulation with other hormones. Additionally, suppressed ubiquitin-cycle pathway during light-dark transition hinted the presence of a complicated network among light, hormone, and protein degradation. The study provides the direct evidence of BR effects in photomorphogenesis and identified the genes involved in BR and light signaling pathway, which will help to elucidate the molecular mechanism of plant photomorphogenesis.

关键词： brassinosteroid light photomorphogenesis hormone interplay ubiquitin.

Synthesis,crystal structure and 3D-QSAR studies of antifungal (bis-) 1,2,4-triazole Mannich bases containing furyl and substituted piperazine moieties

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Chinese Chemical Letters 2018年第3期29卷 441-446页

作者： Yan Zhang yi-zhou Zhan yi Ma xue-Wen Hua wei wei xiao Zhang Hai-Bin song Zheng-Ming li Bao-Lei Wang State Key Laboratory of Elemento-Organic Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) College of ChemistryNankai University

A series of novel title compounds 6a-6r and 7a-7c have been synthesized by Mannich reaction of the new triazole Schiff base intermidiates, substituted piperazine and formaldehyde under mild conditions in excellent yields. The crystal structure of compound 6i was determined to show a chair conformation of the piperazine ring and an （E）-configuration of the C=N double bond. The bioassay results indicated that most of the newly synthesized compounds exhibited excellent in vitro inhibitory activities and broader spectrum against several plant fungi, and were more effective than the control Triadimefon. Several compounds also displayed favourable in vivo antifungal activities. The relationships between the compound structures and various biological activities were discussed. Furthermore, the CoMFA calculation based on the antifungal activity data of compounds 6 against R. cerealis was carried out to establish a 3D-QSAR model, which revealed that steric and electrostatic fields were two most important factors for contributing the bioactivity of the compounds. The present work will provide significant information for guiding optimization of such new structures to develop novel agrochemicals with higher antifungal activities.

关键词： Triazole Furan-2-yl Mannich base Antifungal activity Herbicidal activity 3D-QSAR

Quantum Secure Direct Communication Using Entangled Photon Pairs and Local Measurement

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Communications in Theoretical Physics 2008年第7期50卷 81-84页

作者： yi xiao-Jie NIE yi-You zhou Nan-Run HUANG yi-Bing hong Zhi-Hui li song-song Department of Physics Jiangxi Normal University Nanchang 330022 China Department of Electronics Information Engineering Nanchang University Nanchang 330031 China

We present a scheme for quantum secure direct communication,in which the message is encoded bylocal unitary operations,transmitted through entangled photons,and deduced from both the sender and receiver's localmeasurement *** such a scheme,only one pair of entangled photons is consumed,and there is no need to transmitthe sender's qubit carrying the secret message in a public channel,in order to transmit two-bit classical information.

关键词： quantum secure direct communication quantum cryptography information security

On the properties of the Rational Function Spectrum describing waves near islands and reefs in South China Sea

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Journal of Hydrodynamics 2021年第5期33卷 879-888页

作者： yi-geng Wang Zhi Zong li zhou xiao-long liu xue-kang Gu School of Naval Architecture Dalian University of TechnologyDalian 116024China China Ship Scientific Research Center Wuxi 214082China

On-site measurements show that water waves near islands and reefs in South China Sea exhibit different properties of wave energy distributions with regard to wave frequencies,among which the most prominent factor is the interplay of swells arising from the West Pacific Ocean and the local wind *** also show that the breaking waves continuously appear,containing more energy in high frequency components,and the nonlinear characteristics of the waves are important in adjusting the energy *** properties may explain the large discrepancies between the well-accepted wave spectra(for example the P-M spectrum,Neumann spectrum,ITTC spectrum etc.)and the measured wave spectra near islands and reefs in South China ***,a new Rational Function Spectrum is proposed in this paper to describe waves near islands and reefs which turns out to show satisfactory *** well captures wave power distributions in the form of single and double peaks,at low-and high-frequency regions,as well as nonlinear scale power *** on the investigation of the measured data near an island in South China Sea,the relation between the parameters used in the Rational Function Spectrum and the statistical parameters of water waves(significant wave height and wave period)is *** is noted that the wave properties at low-and high-frequencies are controlled by the local wind velocities at the wave growth stage,but remain constant at the wave decay *** parameter peak frequency is only dependent on the wave period corresponding to the maximum wave *** parameter spectral peak is determined from the wave height and the wave *** relations help to clarify the physical meanings of the parameters used in the Rational Function Spectrum,and thus provide an alternative spectral form to describe random waves near islands and reefs.

关键词： Rational Function Spectrum double peak near islands and reefs swell nonlinear

The bioinformatics and metabolomics research on anti-hypoxic molecular mechanisms of Salidroside via regulating the PTEN mediated PI3K/Akt/NF-κB signaling pathway

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Chinese Journal of Natural Medicines 2021年第6期19卷 442-453页

作者： WU yi MA yi li Jing zhou xue-lin li Lei XU Ping-Xiang li xiao-Rong xue Ming Department of Pharmacology Beijing Laboratory for Biomedical Detection Technology and InstrumentSchool of Basic Medical SciencesCapital Medical UniversityBeijing 100069China Beijing Engineering Research Center for Nerve System Drugs Beijing 100053China Central Laboratory Capital Medical UniversityBeijing 100069China

Salidroside(SAL),a major bioactive compound of Rhodiola crenulata,has significant anti-hypoxia effect,however,its underlying molecular mechanism has not been *** order to explore the protective mechanism of SAL,the lactate dehydrogenase(LDH),reactive oxygen species(ROS),superoxide dismutase(SOD)and hypoxia-induced factor 1α(HIF-1α)were measured to establish the PC12 cell hypoxic *** staining and cell viability analyses were performed to evaluate the protective effects of *** metabolomics and bioinformatics methods were used to explore the protective effects of salidroside under hypoxia *** metabolite-protein interaction networks were further established and the protein expression level was examined by Western *** results showed that 59 endogenous metabolites changed and the expression of the hub proteins of CK2,p-PTEN/PTEN,PI3K,p-Akt/Akt,NF-κB p65 and Bcl-2 were increased,suggesting that SAL could increase the expression of CK2,which induced the phosphorylation and inactivation of PTEN,reduced the inhibitory effect on PI3K signaling pathways and activated the PI3K/Akt/NF-κB survival signaling *** study provided an important insight to reveal the protective molecular mechanism of SAL as a novel drug candidate.

关键词： Salidroside Hypoxia PC 12 Metabolomics PTEN PI3K/Akt/NF-κB

Microstructure and Property of Coarse Grain HAZ X80 Pipeline Steel

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Journal of Iron and Steel Research International 2005年第6期12卷 54-58页

作者： zhou Yun xue xiao-huai QIAN Bai-nian li Jing-li SHAN yi-yin LOU song-nian Shanghai Jiaotong University Shanghai 200030 China Academia Sinica Shenyang 110015 China

The coarse grain HAZ microstructure and property of X80 pipeline steel with different carbon content was investigated. The weld thermal simulation test was carried out on Gleeble 1500 thermal mechanical test machine. The Charpy tests were completed at --20 ℃ for evaluating the toughness of coarse grain heat affected zone （CGHAZ）. The microstructure was examined by optical microscope （OM） and transmission electron microscopy （TEM）, and the austenite constituent was quantified by X-ray diffraction. The results showed that the ultra-low carbon can improve the toughness of CGHAZ by suppressing the formation of carbide, decreasing the martensite austenite （M-A） constituent and increasing the residual austenite in the M A.

关键词： X80 pipeline steel CGHAZ weld simulation FesC carbide ultra low carbon M-A constituent bainitic ferrite

Role of Ru on the Microstructural Evolution During Long-Term Aging of Ni-Based Single Crystal Superalloys

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Acta Metallurgica Sinica(English Letters) 2020年第12期33卷 1689-1698页

作者： wei song Xin-Guang Wang Jin-Guo li Ye-Shun Huang Jie Meng Yan-hong Yang Jin-Lai liu Ji-De liu yi-zhou zhou xiao-Feng Sun Superalloys Division Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Two experimental alloys containing diff erent contents of Ru were investigated to study the eff ect of Ru on the microstructural evolution during long-term thermal *** increase in Ru promoted the formation of cubical,tiny,and evenγ′phase after full heat ***,the samples after full heat treatment were exposed at 1100℃ for diff erent *** on the classical model by lifshitz,Slyozov,and Wagner,the coarsening ofγ′phase of the alloy containing 2.5 and3.5 wt.%Ru during the long-term aging was controlled by the interface reaction and diff usion,***γ/γ′lattice misfi t was more negative with the increment of Ru addition,which induced the formation of stable raftedγ′phase in the alloy containing 3.5 wt.%Ru at the initiation of long-term ***,the increase in Ru reduced the diff usion coeffi cient,which could restrain theγ′phase *** lowerγ/γ′lattice misfi t of the alloy containing 2.5 wt.%Ru promoted the interface reaction,which induced the rapid coarsening ofγ′***,the increase in Ru improved the microstructural stability of the *** the other hand,the raise of Ru induced"reverse partitioning"behavior,which was eff ective in suppressing the emergence of the topologically close-packed phase(TCP phase).The TCP phase occasionally occurred in the alloy containing 2.5 wt.%Ru,which was attributed to the high temperature and the supersaturation of theγ***,the TCP phase was determined asμphase,which had a high concentration of Co,Re,Mo,and W.A sketch map describing the evolution of the TCP phase was also constructed.

关键词： Ni-based superalloys Ruthenium Coarsening TCP phase

Fluorescence "turn-on" Sensing Platform for Glutathione Detection Using Chitosan-Based Glutaraldehyde Non-conjugated Polymers

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Journal of Analysis and Testing 2022年第3期6卷 327-334页

作者： Wen-Jing Qi hong-Kun He xue Tian yi song xue-Ni li Rong li Ping-Ping Hu xiao-Mei Huang Chongqing Key Laboratory of Green Synthesis and Applications College of ChemistryChongqing Normal UniversityChongqing 401331China School of Pharmaceutical Sciences Chongqing UniversityChongqing 401331China Department of Chemistry and Chemical Engineering Sichuan University of Arts and ScienceDazhou 635000China

We established a f uorescence“turn-on”sensing platform for glutathione(GSH)detection utilizing chitosan-based glutaraldehyde non-conjugated polymers(GCPF)as nanomaterials via f uorescence resonance energy transfer(FRET)*** to the overlapping property of absorption spectrum of MnO^(2)nanosheets with f uorescence spectrum of GCPF,f uorescent intensity of GCPF was quenched in the presence of MnO^(2)nanosheets because of FRET *** GSH was added,MnO^(2)nanosheets were reduced and decomposed into large amounts of Mn^(2+)ions owing to reducing property of ***,the quenched f uorescent intensity was turned on ***,this platform based on MnO^(2)nanosheet has been f rst applied to f uorescence“turn-on”detection of GSH from 0.5 to 50μmol/L with sdetection limit of 84 nmol/*** showed high selectivity in GSH detection towards other ions and biomolecules such as L-lysine,L-threonine,L-valine,L-glutamic acid and DL-aspartic *** it was utilized in detecting GSH in serum samples,satisfactory recoveries ranged from 101.5%to 103.2%,indicating the accuracy of this f uorescence“turn-on”platform in bioanalysis.

关键词： Chitosan-based glutaraldehyde non-conjugated polymers MnO_(2)nanosheets Glutathione Fluorescence resonance energy transfer