Search Results - (Author, Cooperation:X. Dai)

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  1. 1
    Staff View
    Publication Date:
    2018-04-12
    Publisher:
    Royal Society
    Electronic ISSN:
    2054-5703
    Topics:
    Natural Sciences in General
    Keywords:
    nanotechnology, chemical physics, environmental science
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-03-09
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Geosciences
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Biochemistry, Molecular Biology
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    R F Huang, Y X Dai, Z H Zhai, Z Wang, J J Zhou and X W Luo
    Institute of Physics (IOP)
    Published 2018
    Staff View
    Publication Date:
    2018-07-31
    Publisher:
    Institute of Physics (IOP)
    Print ISSN:
    1755-1307
    Electronic ISSN:
    1755-1315
    Topics:
    Geography
    Geosciences
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Y. J. Liu ; H. Xu ; W. J. Kong ; M. Shang ; H. X. Dai ; J. Q. Yu
    Nature Publishing Group (NPG)
    Published 2014
    Staff View
    Publication Date:
    2014-11-11
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Air ; Amides/chemistry ; Carbon/*chemistry ; Catalysis ; Chemistry, Pharmaceutical/*methods ; Heterocyclic Compounds/*chemistry ; Hydrogen/*chemistry ; Nitrogen/chemistry ; Oxidants/chemistry ; Palladium/chemistry ; Phosphorus/chemistry ; Sulfur/chemistry
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  5. 5
    A. A. Soluyanov ; D. Gresch ; Z. Wang ; Q. Wu ; M. Troyer ; X. Dai ; B. A. Bernevig
    Nature Publishing Group (NPG)
    Published 2015
    Staff View
    Publication Date:
    2015-11-27
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  6. 6
    Z Han, J Y Fang, S H Xie, J G Deng, Y X Liu and H X Dai
    Institute of Physics (IOP)
    Published 2018
    Staff View
    Publication Date:
    2018-05-17
    Publisher:
    Institute of Physics (IOP)
    Print ISSN:
    1757-8981
    Electronic ISSN:
    1757-899X
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  7. 7
    C. Z. Chang ; J. Zhang ; X. Feng ; J. Shen ; Z. Zhang ; M. Guo ; K. Li ; Y. Ou ; P. Wei ; L. L. Wang ; Z. Q. Ji ; Y. Feng ; S. Ji ; X. Chen ; J. Jia ; X. Dai ; Z. Fang ; S. C. Zhang ; K. He ; Y. Wang ; L. Lu ; X. C. Ma ; Q. K. Xue
    American Association for the Advancement of Science (AAAS)
    Published 2013
    Staff View
    Publication Date:
    2013-03-16
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  8. 8
    L. Kong ; E. Giang ; T. Nieusma ; R. U. Kadam ; K. E. Cogburn ; Y. Hua ; X. Dai ; R. L. Stanfield ; D. R. Burton ; A. B. Ward ; I. A. Wilson ; M. Law
    American Association for the Advancement of Science (AAAS)
    Published 2013
    Staff View
    Publication Date:
    2013-11-30
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Antibodies, Neutralizing/chemistry ; Antigens, CD81/chemistry ; Antiviral Agents/chemistry ; Binding Sites ; Crystallography, X-Ray ; Drug Design ; Epitopes/chemistry/genetics ; Humans ; Immunoglobulin Fab Fragments/chemistry ; Mutagenesis, Site-Directed ; Protein Folding ; Protein Structure, Tertiary ; Viral Envelope Proteins/*chemistry/immunology ; Viral Hepatitis Vaccines/chemistry/immunology
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  9. 9
  10. 10
    Z. K. Liu ; B. Zhou ; Y. Zhang ; Z. J. Wang ; H. M. Weng ; D. Prabhakaran ; S. K. Mo ; Z. X. Shen ; Z. Fang ; X. Dai ; Z. Hussain ; Y. L. Chen
    American Association for the Advancement of Science (AAAS)
    Published 2014
    Staff View
    Publication Date:
    2014-01-18
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  11. 11
    X. Dai ; Z. Zhang ; Y. Jin ; Y. Niu ; H. Cao ; X. Liang ; L. Chen ; J. Wang ; X. Peng
    Nature Publishing Group (NPG)
    Published 2014
    Staff View
    Publication Date:
    2014-11-05
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  12. 12
    N. D. Young ; F. Debelle ; G. E. Oldroyd ; R. Geurts ; S. B. Cannon ; M. K. Udvardi ; V. A. Benedito ; K. F. Mayer ; J. Gouzy ; H. Schoof ; Y. Van de Peer ; S. Proost ; D. R. Cook ; B. C. Meyers ; M. Spannagl ; F. Cheung ; S. De Mita ; V. Krishnakumar ; H. Gundlach ; S. Zhou ; J. Mudge ; A. K. Bharti ; J. D. Murray ; M. A. Naoumkina ; B. Rosen ; K. A. Silverstein ; H. Tang ; S. Rombauts ; P. X. Zhao ; P. Zhou ; V. Barbe ; P. Bardou ; M. Bechner ; A. Bellec ; A. Berger ; H. Berges ; S. Bidwell ; T. Bisseling ; N. Choisne ; A. Couloux ; R. Denny ; S. Deshpande ; X. Dai ; J. J. Doyle ; A. M. Dudez ; A. D. Farmer ; S. Fouteau ; C. Franken ; C. Gibelin ; J. Gish ; S. Goldstein ; A. J. Gonzalez ; P. J. Green ; A. Hallab ; M. Hartog ; A. Hua ; S. J. Humphray ; D. H. Jeong ; Y. Jing ; A. Jocker ; S. M. Kenton ; D. J. Kim ; K. Klee ; H. Lai ; C. Lang ; S. Lin ; S. L. Macmil ; G. Magdelenat ; L. Matthews ; J. McCorrison ; E. L. Monaghan ; J. H. Mun ; F. Z. Najar ; C. Nicholson ; C. Noirot ; M. O'Bleness ; C. R. Paule ; J. Poulain ; F. Prion ; B. Qin ; C. Qu ; E. F. Retzel ; C. Riddle ; E. Sallet ; S. Samain ; N. Samson ; I. Sanders ; O. Saurat ; C. Scarpelli ; T. Schiex ; B. Segurens ; A. J. Severin ; D. J. Sherrier ; R. Shi ; S. Sims ; S. R. Singer ; S. Sinharoy ; L. Sterck ; A. Viollet ; B. B. Wang ; K. Wang ; M. Wang ; X. Wang ; J. Warfsmann ; J. Weissenbach ; D. D. White ; J. D. White ; G. B. Wiley ; P. Wincker ; Y. Xing ; L. Yang ; Z. Yao ; F. Ying ; J. Zhai ; L. Zhou ; A. Zuber ; J. Denarie ; R. A. Dixon ; G. D. May ; D. C. Schwartz ; J. Rogers ; F. Quetier ; C. D. Town ; B. A. Roe
    Nature Publishing Group (NPG)
    Published 2011
    Staff View
    Publication Date:
    2011-11-18
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    *Biological Evolution ; *Genome, Plant ; Medicago truncatula/*genetics/*microbiology ; Molecular Sequence Data ; Nitrogen Fixation/genetics ; Rhizobium/*physiology ; Soybeans/genetics ; *Symbiosis ; Synteny ; Vitis/genetics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  13. 13
    L. Sun ; X. J. Chen ; J. Guo ; P. Gao ; Q. Z. Huang ; H. Wang ; M. Fang ; X. Chen ; G. Chen ; Q. Wu ; C. Zhang ; D. Gu ; X. Dong ; L. Wang ; K. Yang ; A. Li ; X. Dai ; H. K. Mao ; Z. Zhao
    Nature Publishing Group (NPG)
    Published 2012
    Staff View
    Publication Date:
    2012-03-01
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  14. 14
    Li, Z. ; Foster, C. M. ; Dai, X.-H. ; Xu, X.-Z. ; Chan, S.-K. ; Lam, D. J.

    [S.l.] : American Institute of Physics (AIP)
    Published 1992
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Domain switching of 90° ferroelectric domains in tetragonal BaTiO3 and PbTiO3 is induced by the application of stress along specific crystallographic axes. For BaTiO3, single-domain crystals are obtained from twinned specimens by the application of ∼1.1 MPa of stress parallel to the a axis and twin boundaries are induced by application of ∼0.22 MPa of stress parallel to the c axis. Similar piezoelectrically-induced domain switching was observed in PbTiO3 at elevated temperature. We observed the rotation of the crystallographic axes associated with domain switching via micro-Raman spectroscopy. These results were consistent with optical microscope images of the domain switching which demonstrates the usefulness of micro-Raman spectroscopy for the study of ferroelectric domain structures. A phenomenological treatment of domain switching in a piezoelectrically-coupled system is described.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  15. 15
    Ludwig, R. ; Dai, X.-W.

    [S.l.] : American Institute of Physics (AIP)
    Published 1991
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    A novel multistage numerical modeling approach to simulate acoustic-wave generation and propagation of an electromagnetic acoustic transducer (EMAT) is presented. The model assumes a uniform static magnetic field in a conducting half-space. A meander coil winding situated above the half-space is driven by a transient high-frequency current pulse. The numerically computed eddy currents in the conducting specimen are combined with the static magnetic field to yield spatially and temporally diffusive Lorentz forces which in turn are coupled into the elastic-wave equation. This hyperbolic elastodynamic system is solved for the displacement field vector which gives rise to propagating elastic waves. Numerical transduction results are discussed for a generic two-wire transient EMAT configuration and for an isotropic half-space with electric and acoustic material parameters equivalent to those of aluminum.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  16. 16
    El Marssi, M. ; Farhi, R. ; Dai, X. ; Morell, A. ; Viehland, D.

    [S.l.] : American Institute of Physics (AIP)
    Published 1996
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    A Raman study of La-doped lead zirconate titanate ceramics with La/Zr/Ti ratios of 9/65/35 and 12/40/60 has been undertaken in order to compare the onset of ferroelectric order in these two compositions. Some features, such as a splitting of a threefold degenerate T1u mode of the cubic structure into at least two lines or an enhancement of the T2u mode, can be considered as the signature of the occurrence of some ferroelectric order below Tc(approximately-equal-to)363 K in the 12/40/60 compound. Nevertheless, the Raman spectra obtained for the two ceramics are very similar, and no significant narrowing of the lines was observed in the ferroelectric phase of 12/40/60. It is thus suggested that the onset of long range order in this compound is not developed homogeneously in every direction of space, in agreement with previous transmission electron microscopy observations. The Raman scattering was dominately second order, with the broadening of the lines reflecting a distribution of the correlation function of the quasistatic polarization in reciprocal space, which was not sharply peaked at q=0 in all directions. © 1996 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  17. 17
    Xu, Z. ; Dai, X. H. ; Li, J. F. ; Viehland, Dwight

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1997
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Structure–property relationship studies have been performed in the La-modified lead zirconate titanate (PLZT) solution as a function of quenched La impurity content and Zr/Ti ratio. For Zr/Ti ratios of 90/10 and 85/15, an incommensurate antiferroelectric state was found to be stabilized with increasing La content. Temperature-dependent investigations demonstrated that the incommensurate structure becomes pinned into long-time metastable states, rather than transforming to a commensurate phase. Also, the modulation wavelength (λ) was found to increase significantly with the decreasing Zr/Ti ratio and decreasing La content. The results of this study clearly demonstrate that the incommensurately modulated polar structures of PLZT are dependent on the relative antiferroelectric/ferroelectric phase stability, and the concentration of quenched La impurities. © 1997 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  18. 18
    Viehland, Dwight ; Dai, X. H. ; Li, J. F. ; Xu, Z.

    [S.l.] : American Institute of Physics (AIP)
    Published 1998
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Structure–property relationship studies have been performed in the La-modified lead zirconate titanate (PLZT) solution as a function of quenched La impurity content and Zr/Ti ratio by transmission electron microscopy, lattice imaging, and dielectric spectroscopy. Investigations were performed for 65/35≤Zr/Ti≤90/10. These investigations have demonstrated a general trend in domain structure and polar order with increasing quenched impurity concentration. For Zr/Ti ratios of 90/10 and 85/15, a structurally incommensurate antiferroelectric (AFEin) state was found to be stabilized with increasing La. Temperature dependent investigations demonstrated that the incommensurate structure becomes pinned into long-time metastable states, rather than transforming to a commensurate phase. Also, the modulation wavelength (λ) was found to increase significantly with increasing Ti. When λ increased to ∼40 Å, polar clusters began to condense from the AFEin order. For Zr/Ti ratios of 80/20 and 65/35, increasing quenched disorder was found to result in the evolution of polar order through a common sequence of domainlike states including polar clusters, tweedlike structures, and normal micron-sized polydomain structures. These results, in conjunction with dielectric spectroscopy, demonstrate a crossover between a long-period incommensurately modulated state and a relaxor ferroelectric state with increasing quenched disorder. Clearly, both quenched disorder (i.e., random fields) and competing polar orderings (i.e., frustration) underlay the unique behaviors of PLZT. © 1998 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  19. 19
    Johnson, R. B. ; Zebrowski, E. J. ; Dai, X.

    Copenhagen : Munksgaard International Publishers
    Published 2000
    Staff View
    ISSN:
    1600-0714
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    Abstract: Gingival overgrowth commonly occurs coincident to therapy with calcium channel blockers. The biologic mechanism for this condition is unknown; however, many clinicians suggest that poor oral hygiene may contribute to development of the overgrowth. This study tests the hypothesis that collagenous protein synthesis by gingival fibroblasts is synergistically enhanced when they are exposed to both nifedipine (N) and the pro-inflammatory cytokine, interleukin-1-beta, a cytokine expressed in inflamed gingiva. Human gingival fibroblasts were isolated from biopsies of normal gingiva and cells separated into two groups. Group 1 was exposed to media containing 0, 5, 50, or 500 pg/ml IL-1-beta, or 10−7 M N for 7 days; Group 2 was exposed to those concentrations of IL-1-beta +10−7 M N. [3H]-proline was added to the medium for the final 24 h. Cells and matrix were harvested and radioactivity determined by liquid scintillation analysis. Means (d.p.m./103 cells) were compared by factorial ANOVA and Scheffè comparisons. Collagenous protein synthesis was significantly reduced by 5 pg/ml IL-1-beta +10−7 M N and enhanced by 500 pg/ml IL-1-beta +10−7 M N as compared to N or IL-1-beta alone. Thus, patients may be more susceptible to gingival overgrowth coincident to nifedipine therapy as a result of the synergistic enhancement of connective tissue synthesis by these agents.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  20. 20
    Johnson, R. B. ; Streckfus, C. F. ; Dai, X. ; Tucci, M. A.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1999
    Staff View
    ISSN:
    1600-0765
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    The purpose of this study was to compare the efficiency of protein elution from several types of gingival crevicular fluid (GCF) collection papers when the volume of the inoculated protein and the elution methods were constant. Various concentrations of bovine serum albumin (BSA) and 14C-BSA were placed onto strips of Whatman #1 [W1], Whatman 3 MM chromatographic [W3]. Periopaper™ (ProFlow) [P] and Periopaper™ (Harco) [H], and recovered proteins measured following a non-optimized centrifugal elution technique. There were significant differences in % recovery of BSA and 14C-BSA from the papers, which was dependent on both the type of paper and the concentration of the inoculated protein; that is, proteins at the lowest concentrations were less efficiently eluted from GCF collection papers than those at higher concentrations. Equations for regression lines of elution efficiency were quadratic. Thus, our data suggest significant differences in the efficiency for elution of BSA from absorbent papers when the volume of the inoculated fluid and the elution technique were constant. Previous variable or conflicting experimental data between research groups may have resulted from incomplete elution of proteins from GCF collection papers, possibly due to entrapment within, or binding of GCF proteins to the paper.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses