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Direct assembly between closed-shell coinage metal superatoms

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Nano Research 2022年第9期15卷 8665-8672页

作者： Famin Yu Yu Zhu Yang Gao Rui wang Wanrong Huang Yi Gao zhigang wang Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China CenterÉnergie Matériaux et Télécommunications Institut National de la Recherche Scientifique(INRS)VarennesQuébec J3X 1P7kCanada Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

Bottom-up constructing all-metal functional materials is challenging,because the metal clusters are prone to lose their original structures during *** this work,we report that closed-shell coinage metal superatoms can achieve direct chemical bonding without losing their electronic *** reason is that the supermolecule formed by two superatoms has the same number of bonding and anti-bonding supermolecular orbitals,in which the bonding orbitals contribute to bonding and the antibonding orbitals with anti-phase orbitals delocalized over each monomer to maintain the individual geometric and electronic structural *** analysis indicates the interactions between two superatoms are too weak to break the structure of monomers,which is confirmed by the first-principles molecular dynamics *** these superatoms as the basic units,a series of robust one-dimensional and two-dimensional nanostructures are *** findings provide a general strategy to take advantage of superatoms in regulating bonding compared to natural atoms,which paves the way for the bottom-up design of materials with collective properties.

关键词： superatom assembly coinage metal cluster interaction between superatoms

Emerging disciplines based on superatoms: a perspective point of view

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Science Bulletin 2018年第7期63卷 395-397页

作者： Jianpeng wang Weiyu Xie Yang Gao Dexuan Xu zhigang wang Institute of Atomic and Molecular Physics Jilin University Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy Jilin University

In 2016,a whole new organization for advanced science and technology was created in China[1],and even it is called China’s Defense Advanced Research Projects Agency(DARPA).Despite the appropriateness of this metaphor,the reference to DARPA Atoms to Product(A2P)Program reminds us a promising trend towards the atomic-level manufacture of functional materials and *** ensures functional units on the atomic level to play an important *** clusters,whose

关键词：惩罚 DARPA 工程机构原子中国

DESIGN AND CONTROL OF AN ULTRAPRECISION STAGE USED IN GRATING TILING

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Chinese Journal of Mechanical Engineering 2007年第1期20卷 1-4页

作者： wang Yong LIU zhigang BO Feng ZHU Jianqiang Shanghai Institule of Optics and Fine Mechanics Chinese Acadamy of SciencssShanghai 201800China

In petawatt laser system, the *** to compose pulse compressor are very large in size which can be only acquired currently by arraying small aperture gratings to form a large one instead, an approach referred to as grating tiling. Theory and experiments have demonstrated that the coherent addition of multiple small gratings to form a larger grating is viable, the key technology of which is to control the relative position and orientation of each grating with high precision. According to the turin factors that affect the performance of the grating tiling, a 5-DOF ultraprecision stage is developed for the grating tiling experiment. The mechanism is formed by serial structures. The motion of the mechanism is guided by flexure hinges and driven by piezoelectric actuators and the movement resolution of which can achieve nanometer level. To keep the stability of the mechanism, capacitive position sensors with nanometer accuracy are fixed on it to provide feedback signlas with which to realize closed-loop control, thus the *** of the mechanism is within several nanometers range through voltage control and digital PID algorithm. Results of experiments indicate that the performance of the mechanism can meet the requirement of precision for grating tiling.

关键词： Grating compressor Orating filing Flexure mechanism Piezoelectric actuator

Arbuscular mycorrhizal symbiosis facilitates apricot seedling(Prunus sibirica L.)growth and photosynthesis in northwest China

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International Journal of Coal Science & Technology 2021年第4期8卷 473-482页

作者： Yinli Bi Linlin Xie zhigang wang Kun wang Wenwen Liu Wenwu Xie State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology(Beijing)Beijing 100083China Institute of Ecological Environment Restoration in Mine Areas of West China Xi'an University of Science and TechnologyXi'an 710054ShaanxiChina

Arbuscular mycorrhizal(AM)fungi can successfully enhance photosynthesis(P_(n))and plants growth in agricultural or grassland ***,how the symbionts affect species restoration in sunlight-intensive areas remains largely ***,this study’s objective was to assess the effect of AM fungi on apricot seedling physiology,within a specific time period,in northwest *** 2010,an experimental field was established in Shaanxi Province,northwest *** experimental treatments included two AM fungi inoculation levels(0 or 100 g of AM fungal inoculum per seedling),three shade levels(1900,1100,and 550µmol m^(−2) s^(−1)),and three ages(1,3,and 5 years)of *** examined growth,Pn,and morphological indicators of apricot(Prunus sibirica L.)seedling performances in 2011,2013,and *** colonization rate in mycorrhizal seedlings with similar amounts of shade is higher than the corresponding *** mycorrhizal seedling biomass is significantly higher than the corresponding non-mycorrhizal seedling ***,P_(n),stomatal conductance(G_(s)),transpiration rate(T_(r)),and water use efficiency are also significantly higher in the mycorrhizal ***,mycorrhizal seedlings with light shade(LS)have the highest *** is increased in non-mycorrhizal seedlings because of the reduction in T_(r),while T_(r) is increased in mycorrhizal seedlings with *** is a significant increase in the N,P,and K fractions detected in roots compared with *** means that LS had apparent benefits for mycorrhizal *** results also indicate that AM fungi,combined with LS,exert a positive effect on apricot behavior.

关键词： Apricot seedlings Arbuscular mycorrhizal symbiosis Plant growth Light shade Photosynthesis

MiR-430 Can Affect the Mesoderm Formation and Metamorphosis of Paralichthys olivaceus by Targeting lefty Gene

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Journal of Ocean University of China 2020年第2期19卷 409-416页

作者： LI Rui wang Zhenwei SUN Minmin PENG Meiting QI Jie wang zhigang Key Laboratory of Marine Genetics and Breeding Ministry of Education College of Marine Life SciencesOcean University of China

MiR-430 is a non-coding small RNA that participates in early embryonic development by acting on the Nodal signaling *** functions in Paralichthys olivaceus(***),however,remain *** this study,through biological information technology,we hypothesized lefty was the target gene of *** is a divergent member of the transforming growth factor-β(TGF-β)superfamily,and is involved in regulating left-right patterning as an antagonist of the Nodal signaling *** study the relationship between miR-430 and lefty gene,miR-430 and fluorescent expression vector were transfected into embryo *** results showed that miR-430 has important effects on early embryonic *** can inhibit the expressions of lefty and other genes related to Nodal signaling ***,the expression of miR-430 was involved in the metamorphosis of *** study clarifies the function of miR-430 in ***,which will be helpful for further research on the interactions between miR-430 and the Nodal signaling pathway.

关键词： miR-430 lefty Nodal signal pathway Paralichthys olivaceus

Significant enhancement of crystallization kinetics of polylactide in its immiscible blends through an interfacial effect from comb-like grafted side chains

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Science China Chemistry 2016年第5期59卷 609-618页

作者： Yin Chen Yaqiong Zhang Feng Jiang Junyangwang Zhaohua Xu zhigang wang CAS Key Laboratory of Soft Matter Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Department of Material Technology Jiangmen PolytechnicJiangmen 529090China

A significant enhancement in isothermal crystallization kinetics of biodegradable polylactide(PLA) in its immiscible blends can be accomplished through blending it with a comb-like copolymer. PLA was blended with poly(ethylene glycol) methyl ether acrylate(PEGA) and poly[poly(ethylene glycol) methyl ether acrylate](PPEGA, a comb-like copolymer), respectively. The results measured from phase contrast optical microscopy(PCOM) and differential scanning calorimetry(DSC) indicate that PLA and PEGA components are miscible, whereas PLA and PPEGA components are immiscible. The study of crystallization kinetics for PLA/PEGA and PLA/PPEGA blends by means of polarized optical microscopy(POM) and DSC indicates that both PEGA and PPEGA significantly increase the PLA spherulitic growth rates, G, although PLA/PPEGA blends are immiscible and the glass transition temperatures of PLA only have slight decreases. PPEGA component enhances nucleation for PLA crystallization as compared with PEGA component owing to the heterogeneous nucleation effect of PPEGA at the low composition of 20 wt%, while PLA crystallization-induced phase separation for PLA/PEGA blend might cause further nucleation at the high composition of 50 wt%. DSC measurement further demonstrates that isothermal crystallization kinetics can be relatively more enhanced for PLA/PPEGA blends than for PLA/PEGA blends. The "abnormal" enhancement in G for PLA in its immiscible blends can be explained by local interfacial interactions through the densely grafted PEGA side chains in the comb-like PPEGA, even though the whole blend system(PLA/PPEGA blends) represents an immiscible one.

关键词： biodegradable polymer spherulite growth rate phase separation nucleation

LED luminance measurement and development of low-cost computerized perimeter

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仪器仪表学报 2007年第12期28卷 2138-2141页

作者： wang zhigang Yang Li Yang Dong Yin Zhiyong Zhou Qi Institute of Medical Science and Technology （IMSaT） University of Dundee Dundee DD1 4HN UK Bioengineering College Chongqing University Chongqing 400044 China Biomedical Engineering School Chongqing Institute of Technology Chongqing 400050 China

An accurate method has been developed to calculate and measure the luminance of light-emitting diode (LED). A novel, simple-structured and high-precision circuitry was designed, which has been applied to the development of a low-cost threshold static automated perimeter. Round LEDs of 2 mm in diameter were used as stimuli. A logarithmic scale is used to express the differential light sensitivity, where 0 dB represents the brightest stimulus that corresponds to 1 000 asb. The LED radiant power was measured and its equivalent luminance was calculated by the derived equations. The schematics of the system is given, together with a novel circuitry for selecting stimulus point and its luminance. Initial clinical trial results were promising,which led to a further development of a commercial product.

关键词： LED 亮度测量视野视野计成本

Testing and Improving the Performance of the Common Land Model:A Case Study for the Gobi Landscape

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Journal of Meteorological Research 2017年第3期31卷 625-632页

作者： Chao wang zhigang WEI Zhenchao LI Tiangui XIAO Xiaohang WEN College of Atmospheric Sciences Chengdu University of Information Technology/Plateau Atmosphere and Environment Key Laboratory of Sichuan Province State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences

Land surface processes take place on the interface between the earth and atmosphere, exerting significant influ- ences on the weather and climate. Correct modeling of these processes is important to numerical weather forecast and climate prediction. In order to obtain a more thorough understanding of the land surface processes over the Gobi landscape, we evaluated the performance of the Common Land Model （CoLM） at Dunhuang station in Gansu Province of China to determine whether the model formulation, driven by observational data, is capable of simulat- ing surface fluxes over the underlying desert surface. In comparison with the enhanced observation data collected at Dunhuang station over the period 22-28 August 2008, the results showed that the surface albedo simulated by CoLM was larger than that in the observation, and the simulated surface temperature was lower than the observed. After the measured values were used to correct the surface albedo, the solar radiation absorbed by the ground surface was more consistent with the measurements. A new empirical relationship of the surface thermal exchange coefficient r~ was used to modify the thermal aerodynamic impedance. The simulated soil surface temperature became significantly closer to the observed value, and the simulated surface sensible heat as well as net radiative fluxes were also im- proved,

关键词： land surface model numerical simulation parameterization scheme

Characterization of SOX3 Gene in an Ovoviviparous Teleost, Black Rockfish(Sebastes schlegeli)

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Journal of Ocean University of China 2019年第2期18卷 431-440页

作者： MA Liman wang Wenji SHANG Renjie ZHANG Quanqi QI Jie wang zhigang School of Medicine Taizhou UniversityTaizhou 318000 China Key Laboratory of Marine Genetics and Breeding (Ocean University of China) Ministry of Education School of Life Science Taizhou UniversityTaizhou 318000 China

Evolutionary evidence suggests that Sox3, a member of the high-mobility-group(HMG) family of transcription factors, is an ancestral precursor of Sry and is involved in sex determination similar to Sry. However, there is limited information regarding the SOX3 gene of the black rockfish(Sebastes schlegeli). In this study, we first isolated SOX3 gene from the gonads of S. schlegeli by homology cloning. The full-length of S. schlegeli SOX3(SsSOX3) c DNA was 1386 bp, comprising a 906-bp open reading frame, which encodes a peptide showing 93.6% and 93.9% homology with the Sox3 proteins of Epinephelus coioides and Oryzias latipe, respectively. Comparison of the cDNA sequence of the Ss SOX3 gene with the corresponding genomic DNA fragment revealed that the SsSOX3 gene consists of a single exon. Phylogenetic analysis demonstrated the evolutionary relationship of Ss SOX3 with other known SOXB1 genes in fish and tetrapods. The promoter region contains binding sites of several transcriptional factors that might participate in the regulation of Ss SOX3 expression. Quantitative real-time PCR analysis indicated that SsSOX3 was expressed in all the investigated larval developmental stages from 1 to 35 days after birth and the level of expression gradually decreased as the development proceeded. SsSOX3 exhibited sexually dimorphic expression in adult gonads, with high expression in the ovary but low expression in the testis. In situ hybridization revealed that SsSOX3 was strongly expressed in oocytes and follicular cells of ovaries but slightly expressed in germ cells of testicular tissues. Therefore, this study suggests that Ss SOX3 plays an important role in oogenesis and ovary differentiation in S. schlegeli.

关键词： black rockfish promoter analysis Sebastes schlegeli sex determination sexual differentiation SOX3