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Molecular Plant 2013年第1期6卷 88-99页

作者： kosuke Fukui Shinsaku Ito tadao Asami Graduate School of Agricultural and Life Sciences University of Tokyo 1-1-1 Yayoi Bunkyo Tokyo Japan 113-8657 JSt CREST 1-1-1 Yayoi Bunkyo Tokyo Japan 113-8657

Strigolactones （SLs） are a novel class of plant hormones and rhizosphere communication signals, although the molecular mechanisms underlying their activities have not yet been fully determined. Nor is their application in agriculture well developed. the importance of plant hormone agonists has been demonstrated in both basic and applied research, and chemicals that mimic strigolactone functions should greatly facilitate strigolactone research. Here, we report our discovery of a new phenoxyfuranone compound, 4-Br debranone （4BD）, that shows similar activity to that of the major strigolactone （SL） analog GR24 in many aspects of a biological assay on plants. 4BD strongly inhibited tiller bud outgrowth in the SL-deficient rice mutant d10 at the same concentration as GR24, with no adverse effects, even dur- ing prolonged cultivation. this result was also observed in the Arabidopsis thaliana SL-deficient mutants max1, max3, and max4. However, the application of 4BD to the Arabidopsis SL-insensitive mutant max2 induced no morphological changes in it. the expression of SL biosynthetic genes was also reduced by 4BD treatment, probably via negative feed- back regulation. However, in a seed germination assay on Striga hermonthica, a root parasitic plant, 4BD showed far less activity than GR24. these results suggest that 4BD is the first plant-specific strigolactone mimic.

关键词： strigolactones plant growth regulator Arabidopsis rice debranone branching tillering.

Is germinal center selection required for influenza vaccination?

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Cellular & Molecular Immunology 2017年第8期14卷 655-657页

作者： kosuke Miyauchi Masato Kubo Laboratory for Cytokine Regulation Research Center for Integrative Medical Science(IMS)RIKEN Yokohama InstituteYokohamaKanagawa 230-0045Japan Division of Molecular Pathology Research Institute for Biomedical ScienceTokyo University of ScienceNodaChiba 278-0022Japan

It has long been believed that the generation of high-affinity neutralizing antibodies is critical for antiviral humoral *** production of high-affinity antibodies depends on the formation of germinal centers(GC)in ly... 详细信息

关键词： centers center neutral

On the pressure and stress singularities induced by steady flows of incompressible viscous fluids

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Acta Mechanica Sinica 2009年第4期25卷 451-462页

作者： G.B.Sinclair X.chi t.I-P.Shih Department of Mechanical Engineering Louisiana State University Department of Aerospace Engineering Iowa State University

Design for structural integrity requires an appreciation of where stress singularities can occur in structural configurations. While there is a rich literature devoted to the identification of such singular behavior in solid mechanics, to date there has been relatively little explicit identification of stress singularities caused by fluid flows. In this study, stress and pressure singularities induced by steady flows of viscous incompressible fluids are asymptotically identified. this is done by taking advantage of an earlier result that the Navier-Stokes equations are locally governed by Stokes flow in angular corners. Findings for power singularities are confirmed by developing and using an analogy with solid mechanics. this analogy also facilitates the identification of flow-induced log singularities. Both types of singularity are further confirmed for two global configurations by applying convergence-divergence checks to numerical results. Even though these flow-induced stress singularities are analogous to singularities in solid mechanics, they nonetheless render a number of structural configurations singular that were not previously appreciated as such from identifications within solid mechanics alone.

关键词： Incompressible viscous fluids Navier-Stokes equations Fluid-structure interactions Stress singularities

topographic Indices and Yield Variability in a Rolling Landscape of Western Canada

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Pedosphere 2009年第3期19卷 362-370页

作者： chi Bao-Liang BING Cheng-Si F. WALLEY t. YAtES Dryland Agricultural Research Center Shanxi Academy of Agricultural Sciences Taiyuan Shanxi 030031 （China） Department of Soil Science University of Saskatchewan Saskatoon SK （Canada）

Understanding the relationships between topographic indices and crop yield variability is important for soil manage- ment and crop production in rolling landscape. two agricultural fields at Alvena and Hepburn, Saskatchewan, Canada were selected to examine how topographic indices were related to wheat yield under two topographic and weather conditions in the Canadian prairies. the landscapes of the two sites are classified as hummocky and the dominant soil type is an Aridic Ustoll. the relationships among yield, topography, soil, and weather were analyzed using wheat (triticum aestivum L.) grain yield from Alvena in 2001 (dry year) and 2004 (wet year) and from Hepburn in 1998 (dry year). topographic/soil indices included relative elevation, wetness index, upslope length, curvature, soil organic matter, and soil moisture storage before seeding. the results indicated that, in the dry years, the correlation coefficients between upslope length and grain yield were 0.79 for the typical rolling landscape (Alvena) in 2001 and 0.73 for shallow gentle rolling landscape (Hepburn) in 1998. In the wet year (2004), the relationships between yield and topographic/soil attributes were not as strong as in dry years. therefore, upslope length was the best yield indicator for the two landscapes in dry years, whereas no topographic indices were highly correlated to crop yield in wet years. those topographic indices seemed useful in identifying the yield variability and delineating the proper management zone.

关键词： rolling landscape topographic indices upslope length yield variability

Effect of pore water chemistry on anisotropic behavior of clayey soil and possible application in underground construction

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Underground Space 2016年第2期1卷 114-123页

作者： Jinchun Chai takehito Negami kosuke Aiga takenori Hino Graduate School of Science and Engineering Saga University1 HonjyoSaga 840-8502Japan Institute of Lowland and Marine Research Saga University1 HonjyoSaga 840-8502Japan

the effect of pore water chemistry on anisotropic behavior of consolidation and shear strength of reconstituted Ariake clay has been investigated *** types of chemicals added into the pore water of the soil for enhancing flocculation microstructure of soil particles are sodium chloride(salt)(NaCl),and calcium chloride(CaCl_(2));and two dispersants added are sodium triphosphate(Na_(5)-P_(3)O_(10))and sodium hexametaphosphate(Na_(6)P_(6)O_(18)),*** concentrations of these chemicals in pore water were 2-3%.Degrees of anisotropy of the coefficient of consolidation and undrained shear strength decreased with adding NaCl and CaCl_(2),but increased with adding the *** of anisotropy also increased with one-dimensional(1D)deformation and the samples with dispersive additives had higher increase *** has been confirmed qualitatively by scanning electron microscopy(SEM)images that adding dispersive chemicals promoted the formation of dispersive microstructure and increased the degree of anisotropy,and the chemicals enhancing flocculent microstructure had an inverse *** possible application of the findings to underground construction has been discussed also.

关键词： Anisotropy Pore water chemistry Clay Consolidation Shear strength SEM image Underground construction

Sin1-mtORC2 signaling drives glycolysis of devetoping thymocytes

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Journal of Molecular Cell Biology 2019年第2期11卷 91-92页

作者： Hongbo chi Department of Immunology St. Jude Children's Research Hospital Memphis TN 38105 USA

Emerging studies highlight the import-ance of metabolic reprogramming in t cell development and function, although how these processes are regulated remains to be fully understood. Recent advances in dissecting the roles of Sinl-m t0RC2 signaling in early thymocyte development provide new in sight into the dynamic in terplay between immune signaling and cell metabolism, as well as the crucial role in directi ng thymocyte pro life ration and development.

关键词： Sin1-mtORC2 thymocytes glycolysis

Large-scale Circulation Control of the Occurrence of Low-level turbulence at Hong Kong International Airport

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Advances in Atmospheric Sciences 2018年第4期35卷 435-444页

作者： Marco Y. t. LEUNG Wen ZHOU chi-Ming SHUN Pak-Wai CHAN Guy Carpenter Asia-Pacific Climate Impact Center School of Energy and Environment City University of Hong Kong Hong Kong China Hong Kong Observatory Hong Kong China

this study identifies the atmospheric circulation features that are favorable for the occurrence of low-level turbulence at Hong Kong International Airport [below 1600 feet （around 500 m）]. By using LIDAR data at the airport, turbulence and nonturbulence cases are selected. It is found that the occurrence of turbulence is significantly related to the strength of the southerly wind at 850 hPa over the South china coast. On the other hand, the east-west wihd at this height demonstrates a weak relation to the occurrence. this suggests that turbulence is generated by flow passing Lantau Island from the south. the southerly wind also transports moisture from the South china Sea to Hong Kong, reducing local stability. this is favorable for the development of strong turbulence. It is also noted that the strong southerly wind during the occurrence of low-level turbulence is contributed by an anomalous zonal gradient of geopotential in the lower troposphere over the South china Sea. this gradient is caused by the combination of variations at different timescales. these are the passage of synoptic extratropical cyclones and anticyclones and the intraseasonal variation in the western North Pacific subtropical high. the seasonal variation in geopotential east of the tibetan Plateau leads to a seasonal change in meridional wind, by which the frequency of low-level turbulence is maximized in spring and minimized in autumn.

关键词： LIDAR temperate cyclone and anticyclone western North Pacific subtropical high seasonal cycle topography effect

Observer Design —— A Survey

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International Journal of Automation and computing 2015年第1期12卷 50-61页

作者： chia-chi tsui 1.743 Clove Road Staten Island NY 10310 USA

this paper surveys the results of observer design for linear time-invariant(L-t-I) deterministic irreducible open-loop systems(OLS), the most basic type of OLS. An observer estimates Kxx(t) signal where K is a constant and x(t) is the state vector of the OLS. thus, an observer can be used as a feedback controller that implements state feedback control(SFC) or Kxx(t)-control,and observer design is therefore utterly important in all feedback control designs of state space theory. In this survey, the observer design results are divided into three categories and for three respective main purposes. the first category of observers estimate signal Kxx(t) only with a given K, and this survey has four conclusions: 1) Function observer that estimates Kxx(t) directly is more general than state observer that estimates x(t), and may be designed with order lower than that of state observer, and the additional design objective is to minimize observer order; 2) the function observer design problem has already been simplified to the solving of a single set of linear equations only while seeking the lowest possible number of rows of the solution matrix, and an apparently most effective and general algorithm of solving such a problem can guarantee unified upper and lower bounds of the observer order; 3) Because such a single set of linear equations is the simplest possible theoretical formulation of the design problem and such theoretical observer order bounds are the lowest possible, and because the general, simple, and explicit theoretical formula for the function observer order itself do not exist, the theoretical part of this design problem is solved; 4) Because the function observer order is generically near its upper bound, further improvement on the computational design algorithm so that the corresponding observer order can be further reduced,is generically not worthwhile. the second category of observers further realize the loop transfer function and robustness properties of t

关键词： Low order function observer robust output feedback observer synthesized design principle faults and time-delays

Effect of high pressure on physiological activity of bacteria in milk

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chinese Science Bulletin 1997年第17期42卷 1465-1468页

作者： chi, YB Ma, XF Cui, t Cui, QL Jin, ZS Han, J State Key Laboratory of Superhard Materials Jilin University Changchun China Department of Environmental Science Jilin University Changchun China

tHE research about high pressure effect on life activities and its action mechanisms has just begun, especially the studies carried out in the pressure range of above several ten MPa. this is a significant shortcoming in research aspect of life activities of bacteria. Now, it is not very difficult to obtain high pressure below several GPa in a bigger cell with the development of high pressure technique. Some researchers have begun to study the microorganisms under

关键词： bacteria coliform group physiological activity pressure restraint.

Free vibration and transient response of double curved beams connected by intermediate straight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-tALOOKOLAEI H.GHANDVAR E.JUMAEV S.KHAtIR t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for Engineering Application and technology Solutions Ho Chi Minh City Open University

this paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. the strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. the curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. the accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

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