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S-acylation of YKT61 modulates its unconventional participation in the formation of SNARE complexes in Arabidopsis

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Journal of Genetics and Genomics 2024年第10期 1079-1088页

作者： Ting Ma jun-ru tan Jin-Yu Lu Sha Li Yan Zhang College of Life Sciences Shandong Agricultural University Frontiers Science Center for Cell Responses College of Life SciencesNankai University

Hetero-tetrameric soluble N-ethylmaleimide-sensitive factor attachment protein receptors(SNAREs)complexes are critical for vesicle-target membrane fusion within the endomembrane system of eukaryotic cells. SNARE assembly involves four different SNARE motifs, Qa, Qb, Qc, and R, provided by three or four SNARE proteins. YKT6 is an atypical R-SNARE that lacks a transmembrane domain and is involved in multiple vesicle-target membrane fusions. Although YKT6 is evolutionarily conserved and essential, its function and regulation in different phyla seem distinct. Arabidopsis YKT61, the yeast and metazoan YKT6homologue, is essential for gametophytic development, plays a critical role in sporophytic cells, and mediates multiple vesicle-target membrane fusion. However, its molecular regulation is unclear. We report here that YKT61 is S-acylated. Abolishing its S-acylation by a C195S mutation dissociates YKT61 from endomembrane structures and causes its functional loss. Although interacting with various SNARE proteins, YKT61 functions not as a canonical R-SNARE but coordinates with other R-SNAREs to participate in the formation of SNARE complexes. Phylum-specific molecular regulation of YKT6 may be evolved to allow more efficient SNARE assembly in different eukaryotic cells.

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TWO-SCALE CURVED ELEMENT METHOD FOR ELLIPTIC PROBLEMS WITH SMALL PERIODIC COEFFICIENTS

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Journal of Computational Mathematics 2002年第4期20卷 381-390页

作者： Jin-ru Chen jun-zhi Cui School of Mathematics and Computer Sciences Nanjing Normal UniversityNanjing 210097China LSEC ICMSECAcademy of Mathematics and System SciencesChinese Academy of SciencesBeijing 100080China

This paper is concerned with the second order elliptic problems with small periodic coefficients on a bounded domain with a curved boundary. A two-scale curved element method which couples linear elements and isoparametric elements is proposed. The error estimate is obtained over the given smooth domain. Furthermore an additive Schwarz method is provided for the isoparametric element method.

关键词： two-scale curred element small periodic coefficients

TWO-SCALE FEM FOR ELLIPTIC MIXED BOUNDARY VALUE PROBLEMS WITH SMALL PERIODIC COEFFICIENTS

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Journal of Computational Mathematics 2001年第5期19卷 549-560页

作者： Jin-ru Chen jun-zhi Cui School of Mathematics and Computer Sciences Nanjing Normal UniversityNanjing 210097China ICMSEC Academy of Mathematics and Systems SciencesChinese Academy of SciencesBeijing 100080China

Presents a study which proposed a dual approximate expression of the exact solution for mixed boundary value problems of second order elliptic partial differential equation with small periodic coefficients. Dual appro... 详细信息

关键词： two-scale FEM mixed boundary value small periodic coefficients

Influence of aeration and initial water thickness on axial velocity attenuation of jet flows

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第5期14卷 362-370页

作者： Wang-ru WEI jun DENG Bin LIU State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Hydro-China Kunming Engineering Corporation

With the development of ski-jump energy dissipation for high and large discharge among the hydraulic projects,the effects of characteristics of water flow on energy dissipation are increasingly *** the present study,the effects of aeration and the initial water thickness on axial velocity attenuation of jet flow were analyzed,using variance analysis and numerical calculated *** the analysis of test data,both of the air concentration and initial water thickness are sensitive factors for the axial velocity attenuation of jet flow along the axial way,and there is no significant interaction effect between the aeration and initial water *** has a more significant effect on the axial velocity attenuation of jet *** the initial water thickness of jet flow can reduce the length of jet core,and make the initial position of axial velocity attenuation closer to the nozzle *** numerical calculation results show that aeration can contribute to the enhancement of entrainment ability of jet flow,which may improve the interaction between jet flow and *** ski-jump energy dissipation among the hydraulic projects,combining aeration with decreasing initial water thickness of jet flow is an effective way to enhance the rate of axial velocity attenuation.

关键词： Velocity Aeration Initial water thickness Jet flows

Detection of electron-phonon coupling in two-dimensional materials by light scattering

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Nano Research 2021年第6期14卷 1711-1733页

作者： Jia-Min Lai Ya-ru Xie jun Zhang State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China CAS Center of Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing101408China Beijing Academy of Quantum Information Science Beijing100193China

Electron-phonon coupling affects the properties of two-dimensional(2D)materials significantly,leading to a series of novel *** light scattering provides a powerful experimental tool to explore electron-phonon interaction in 2D *** review gives an overview of the basic theory and experimental advances of electron-phonon coupling in 2D materials detected by Raman and Brillouin scattering,*** the Raman scattering part,we review Raman spectroscopy studies of electron-phonon coupling in graphene,transition metal disulfide compounds,van der Waals heterostructures,strongly correlated systems,and 2D magnetic *** the Brillouin scattering part,we extensively introduce Brillouin spectroscopy in non-van der Waals 2D structures,including temperature sensors for phonons and magnons,interfacial Dzyaloshinsky-Moriya interaction and spin torque in multilayer magnetic structures,as well as exciton-polariton in semiconductor quantum well.

关键词： electron-phonon coupling Raman scattering Brillouin scattering two-dimensional(2D)materials

Free Boundary Value Problem for the Cylindrically Symmetric Compressible Navier-Stokes Equations with a Constant Exterior Pressure

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Acta Mathematicae Applicatae Sinica 2018年第4期34卷 761-774页

作者： ru-xu LIAN jun-li WANG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Guanghua School of Management Peking University Beijing 100871 China

This paper is concerned with the free boundary value problem（FBVP） for the cylindrically symmetric barotropic compressible Navier-Stokes equations（CNS） with density-dependent viscosity coefficients in the case that across the free surface stress tensor is balanced by a constant exterior pressure. Under certain assumptions imposed on the initial data, the unique cylindrically symmetric strong solution is shown to exist globally in time and tend to a non-vacuum equilibrium state exponentially as time tends to infinity.

关键词： Navier-Stokes equations cylindrically symmetric density-dependent viscosity coefficients con-stant exterior pressure strong solution

A priori estimates and blow-up behavior for solutions of-QNu- Veu in bounded domain in R^N

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Science China Mathematics 2016年第3期59卷 479-492页

作者： XIE ru Long GONG Hua jun School of Mathematical Sciences University of Science and Technology of China Hefei 230026 China Department of Mathematics Chaohu University Hefei 238000 China

Let Q_N be an N-anisotropic Laplacian operator, which contains the ordinary Laplacian operator,N-Laplacian operator and the anisotropic Laplacian operator. We firstly obtain the properties of Q_N, which contain the weak maximal principle, the comparison principle and the mean value property. Then a priori estimates and blow-up analysis for solutions of-Q_(N^u) = Ve^u in bounded domain in R^N, N≥2 are ***, the blow-up behavior of the only singular point is also considered.

关键词： blow-up behavior N-anisotropic Laplacian N-anisotropic Liouville equation

A new prenylated arylbenzofuran derivative from Morus alba L.

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Chinese Chemical Letters 2010年第3期21卷 329-331页

作者： Tian, Hai Ying He, Xi Zeng, Guang Yao tan, Jian Bin Shuang, Fu Liu, Guo ru tan, Gui Shan Zhou, Ying jun Cent S Univ Sch Pharmaceut Sci Changsha 410013 Hunan Peoples R China Changzhi Med Coll Changzhi 047000 Shanxi Peoples R China

2-[3,5-Di-O-β-D-glucosyl-4-(3-methylbut-2-enyl)phenyl]benzofuran-6-ol,a new prenylated arylbenzofuran derivative was isolated from Morus alba *** structure was elucidated by various spectroscopic methods including MS... 详细信息

关键词： Morus alba L. Prenylated arylbenzofuran 2-[3 5-Di-O-β-D-glu-4-(3-methylbut-2-enyl)phenyl]benzofuran-6-ol

Knowledge-based detection method for SAR targets

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Journal of Systems Engineering and Electronics 2014年第4期25卷 573-579页

作者： Fei Gao Achang ru jun Wang Shiyi Mao School of Electronic and Information Engineering Beihang University

When the classical constant false-alarm rate （CFAR） combined with fuzzy C-means （FCM） algorithm is applied to target detection in synthetic aperture radar （SAR） images with complex background, CFAR requires block-by-block estimation of clutter models and FCM clustering converges to local optimum. To address these problems, this paper pro-poses a new detection algorithm： knowledge-based combined with improved genetic algorithm-fuzzy C-means （GA-FCM） algorithm. Firstly, the algorithm takes target region＇s maximum and average intensity, area, length of long axis and long-to-short axis ratio of the external ellipse as factors which influence the target appearing probabil- ity. The knowledge-based detection algorithm can produce preprocess results without the need of estimation of clutter models as CFAR does. Afterward the GA-FCM algorithm is improved to cluster pre-process results. It has advantages of incorporating global optimizing ability of GA and local optimizing ability of FCM, which will further eliminate false alarms and get better results. The effectiveness of the proposed technique is experimentally validated with real SAR images.

关键词： synthetic aperture radar (SAR) target detection,knowledge-based improved genetic algorithm-fuzzy C-means(GA-FCM) algorithm.