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Nucleoporin 160 Regulates Flowering through Anchoring HOS1 for Destabilizing CO in Arabidopsis

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Plant Communications 2020年第2期1卷 66-76页

作者： Chunying Li lu Liu zhi Wei Norman Teo Lisha Shen hao Yu Department of Biological Sciences Faculty of ScienceNational University of SingaporeSingapore 117543Singapore Temasek Life Sciences Laboratory National University of SingaporeSingapore 117604Singapore

Nuclear pore complexes(NPCs),which comprise multiple copies of nucleoporins(Nups),are large protein assemblies embedded in the nuclear envelope connecting the nucleus and *** it has been known that Nups affect flowering in Arabidopsis,the underlying mechanisms are poorly ***,we show that loss of function of Nucleoporin 160(Nup160)leads to increased abundance of CONSTANS(CO)protein and the resulting upregulation of FLOWERING LOCUS T(FT)specifically in the *** demonstrate that Nup160 regulates CO protein stability through affecting NPC localization of an E3-ubiquitin ligase,HIGH EXPRESSION OF OSMOTICALLY RESPONSIVE GENES1(HOS1),which destabilizes CO protein in the morning *** together,these results provide a mechanistic understanding of Nup function in the transition from vegetative to reproductive growth,suggesting that deposition of HOS1 at NPCs by Nup160 is essential for preventing precocious flowering in response to photoperiod in Arabidopsis.

关键词： nuclear pore complexes HOS1 CO flowering time

Ethylene glycol-regulated ammonium vanadate with stable layered structure and favorable interplanar spacing as high-performance cathode for aqueous zinc ion batteries

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Chinese Chemical Letters 2023年第8期34卷 508-512页

作者： Chao lu zhi Yang Yujie Wang Yun Zhang hao Wu Yi Guo Wenlong Cai School of Mechanical Engineering Chengdu UniversityChengdu 610106China Department of Chemistry College of Resource and EnvironmentBaoshan UniversityBaoshan 678000China College of Materials Science and Engineering Sichuan UniversityChengdu 610064China College of Optoelectronic Engineering Chengdu University of Information TechnologyChengdu 610225China

Ammonium vanadate compounds featuring large capacity,superior rate capability and light weight are regarded as promising cathode materials for aqueous zinc ion batteries(AZIBs).However,the controllable synthesis of desired ammonium vanadates remains a ***,various ammonium vanadate compounds were successfully prepared by taking advantage of ethylene glycol(EG)regulated polyolreduction strategy and solvent effect via hydrothermal *** morphology and crystalline phase of resultant products show an evolution from dendritic(NH_(4))_(2)V_(6)O_(16)to rod-like NH_(4)V_(4)O_(10)and finally to lamellar(NH4)2V4O9 as increasing the amount of ***,the NH_(4)V_(4)O_(10)product exhibits a high initial capacity of 427.5 mAh/g at 0.1 A/g and stable cycling with a capacity retention of 90.4%after 5000 cycles at 10 A/*** relatively excellent electrochemical performances of NH_(4)V_(4)O_(10)can be ascribed to the stable open-framework layered structure,favorable(001)interplanar spacing,and peculiar rod-like morphology,which are beneficial to the highly reversible Zn^(2+)storage *** work offers a unique way for the rational design of high-performance cathode materials for AZIBs.

关键词： Ammonium vanadate rods Ethylene glycol reduction Zn^(2+)storage Cathode Aqueous zinc ion battery

Exact mobility edges and topological phase transition in two-dimensional non-Hermitian quasicrystals

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Science China(Physics,Mechanics & Astronomy) 2022年第2期65卷 82-90页

作者： zhi-hao Xu Xu Xia Shu Chen Institute of Theoretical Physics and State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi UniversityTaiyuan 030006China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Chern Institute of Mathematics and LPMC Nankai UniversityTianjin 300071China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Yangtze River Delta Physics Research Center Liyang 213300China

The emergence of the mobility edge(ME)has been recognized as an important characteristic of Anderson *** difficulty in understanding the physics of the MEs in three-dimensional(3 D)systems from a microscopic image encourages the development of models in lower-dimensional systems that have exact *** most of the previous studies are concerned with one-dimensional(1 D)quasiperiodic systems,the analytic results that allow for an accurate understanding of two-dimensional(2 D)cases are *** this work,we disclose an exactly solvable 2 D quasicrystal model with parity-time(PT)symmetry displaying exact *** the thermodynamic limit,we unveil that the extended-localized transition point,observed at the PT symmetry breaking point,is topologically characterized by a hidden winding number defined in the dual *** coupling waveguide platform can be used to realize the 2 D non-Hermitian quasicrystal model,and the excitation dynamics can be used to detect the localization features.

关键词： quasicrystals mobility edges non-Hermitian systems localization properties

Linear and Nonlinear Optical Properties of Novel Multi-branched Oligomers

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Chinese Journal of Chemical Physics 2012年第6期25卷 636-641,I0003页

作者： Li-jing Gong Ying-hui Wang zhi-hui Kang Tian-hao Huang Ran lu Han-zhuang Zhang College of Physics Jilin University Changchun 130012 China College of Chemistry Jilin University Changchun 130012 China Aviation University of Air Force Changchun 130022 China

We investigate the fluorene-vinylene unit dependent photo-physical properties of multi- branched truxene based oligomers （Tr-OFVn, n=1-4） employing steady-state absorption and emission spectroscopy, transient absorption spectroscopy, two-photon fluorescence, and z-scan technique. The results show that the increasing of fluorene-vinylene unit leads to a red-shift in the spectra of absorption and fluorescence, and shortens the excited state lifetime. Meanwhile, two-photon fluorescence efficiency and two-photon absorption cross section of truxene based oligolners gradually enhance in company with the extension of π- conjugated length. In addition, the values of two-photon absorption cross section modeled on the sum-over-state approach agree well with the experimental ones. The results indicate multi-branched truxene based oligomers bearing organic materials for two-photon applications.

关键词： Multi-branch oligomer Two-photo absorption Z-scan

Structural and Photoluminescence Characterization of GaN Film Grown on Si(111)Substrate

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Chinese Physics Letters 1999年第4期16卷 293-294页

作者： YE zhi-zhen ZHANG hao-xiang lu Huan-ming Zhao Bing-hui State Key Laboratory of Silicon Materials Zhejiang UniversityHangzhou 310027

GaN epilayer grown on Si(111)substrate by a novel vacuum reaction method rather than metal organic chemical vapor deposition or molecule beam epitaxy is *** electron micrograph shows that surface of GaN film is flat and crack-free.A pronounced GaN(0002)peak appears in the x-ray diffraction *** full width at half-maximum(FWHM)of the double-crystal x-ray rocking curve for(0002)diffraction from the GaN epilayer is *** photoluminescence spectrum shows that the GaN epilayer emits light at the wavelength of 365nm with an FWHM of 8nm(74.6meV).

关键词： Si(111) GaN vacuum

Rapid Profiling of Alkaloids in Several Medicinal Herbs by Matrix-assisted Laser Desorption/Ionization Mass Spectrometry

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Chemical Research in Chinese Universities 2010年第1期26卷 11-16页

作者： lu Lin YUE hao SONG Feng-rui TSAO Rong LIU zhi-qiang LIU Shu-ying Changchun Center of Mass Spectrometry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China Guelph Food Research Centre Agriculture and Agri-Food Canada 93 Stone Road West Guelph Ontario N1G5C9 Canada Graduate School Chinese Academy of Sciences Beijing 100049 P. R. China

A simple method was developed for rapid and direct profiling of alkaloids in medical herbs via matrix-assisted laser desorption/ionization time-of-flight mass spectrometry（MALDI-TOF MS）. The dry herbs were first ground to powder and passed through a stainless steel sieve, mixed with the matrix solution to form a homogeneous suspension, which was then directly applied to MALDI analysis. Several matrices were investigated and 2,5- dihydroxybenzoic acid（DHB） was chosen as the optimized one, and the particle with small size was found to favor the analysis. Using this method, the profiles of alkaloids in several medical herbs were readily obtained, and the toxicities of crude and processed Radix Aconiti Lateralis Preparata were compared via the relative intensities of the peaks of the corresponding toxic components shown in their MALDI spectra. This method therefore provides a rapid and reliable protocol for obtaining profiles of alkaloids in medical herbs by using MALDI-TOF MS.

关键词： Matrix-assisted laser desorption/ionization Alkaloid Medical herb

Partners in Epoxide Copolymerization Catalysis:Approach to High Activity and Selectivity

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Chinese Journal of Polymer Science 2022年第11期40卷 1331-1348页

作者： Xiao-Bing lu Bai-hao Ren State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024China

The ring-opening alternating copolymerization processes of epoxides with small-molecule monomers,such as carbon dioxide(CO_(2)),carbonyl sulfide(COS)and cyclic anhydrides,are powerful strategies for preparing polymeric materials with degradable carbonate/ester/thiocarbonate main-chain backbone *** catalysts selected for copolymerization processes play crucial roles in determining their reaction rates and productivities,as well as the selectivity,regio-and stereochemistry,compositions,and the molecular weights of their resultant *** processes often generate undesirable byproducts such as polyether or ether linkages dispersed randomly within the copolymer's chain,and/or more thermodynamically stable cyclic *** this account,we outline our efforts of over a dozen years on developing highly active well-defined metal catalysts based on inter-and intra-molecular synergistic strategies to selectively produce completely alternating copolymers from epoxides and various small-molecule *** attention was paid to the enantioselective resolution copolymerization processes of racemic epoxides via regioselective ring-openings,and the asymmetric copolymerization processes of meso-epoxides with CO_(2),COS,or cyclic anhydrides via dissymmetrical ring-openings using multichiral catalytic systems,and affording isotactic copolymers with main-chain *** addition,this account provides a thorough mechanistic understanding of the high reactivities,excellent selectivity,and unprecedented stereochemical controls of these copolymerization systems,mediated by interand intramolecular synergistic catalysis.

关键词： Epoxide Ring-opening copolymerization Synergistic catalysis CO_(2) Stereochemistry control

Effect of thermal cycles on microstructure of reduced activation steel fabricated using laser melting deposition

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Journal of Iron and Steel Research International 2021年第3期28卷 316-326页

作者： Qian An zhi-xin Xia Chi Zhang zhi-gang Yang hao Chen School of Material Science and Engineering Tsinghua UniversityBeijing100084China Shagang School of Iron and Steel Soochow UniversitySuzhou215021JiangsuChina

Reduced activation steel was successfully fabricated by laser melting deposition employing a Gaussian and a ring-shaped *** microstructure evolution of the reduced activation steel was investigated using the scanning electron microscope,transmission electron microscope and electron backscatter *** experimental results showed that the grains close to the substrate were smaller than the grains in the upper *** to those deposited using a Gaussian laser,the samples deposited using a ring-shaped laser showed a more homogeneous ***,a finite element analysis(FEA)model was applied to reveal the thermal history during laser melting *** simulation results were well validated with the experimental *** results indicate that the peak temperature increases and the cooling rate decreases,as the layer gets further from the ***,the temperature and the cooling rate resulting from the Gaussian laser model were higher at the midline of the samples and lower around the edges,whereas those of the ring-shaped laser model were consistent with both at the center and around the edges.

关键词： Laser melting deposition Reduced activation steel Microstructure evolution Thermal cycle Finite element analysis

Instantaneous mixing characteristics of binary mixtures differing in density in a gas-solid fluidised bed

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Particuology 2020年第6期18卷 63-71页

作者： Zhen Wan Youjun lu hao Wang State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina

Characterisations of instantaneous mixing behaviours in fluidised beds with binary mixtures has many *** studied the instantaneous mixing characteristics of binary mixtures in a 2-D quasi gas-solid fluidised bed using a capacitance probe *** method enabled the quantitative assessment of instantaneous mixing behaviours,including mixing index,rate,and *** kinds of binary mixtures of similar size but different density were used for the transient and steady fluidisation experiments in a bubbling fluidised *** mixing curves of initially segregated binary mixtures were acquired,and the instantaneous characteristics for the entire process were *** equation was proposed to describe the mixing process and predict the mixing degree over *** comparing experiments with different working conditions,the effects of superficial gas velocity and density ratio on the mixing in the centre and at the wall of the fluidised bed were *** the stable fluidisation stage,the axial concentration profiles of the mixtures were obtained,and the mechanisms of mixing were *** showed that the mixing level increased logarithmically with time and eventually reached a relatively stable *** the superficial gas velocity and reducing the density ratio promoted mixing and reduced mixing *** superficial gas velocities tended to mix the mixtures well and quickly,regardless of the density ratio of the two components.

关键词： Binary mixtures Fluidised bed Mixing Instantaneous characteristics