Search Results - (Author, Cooperation:X. Dai)
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1Staff View
Publication Date: 2018-04-12Publisher: Royal SocietyElectronic ISSN: 2054-5703Topics: Natural Sciences in GeneralKeywords: nanotechnology, chemical physics, environmental sciencePublished by: -
2Tan, C. S. H., Go, K. D., Bisteau, X., Dai, L., Yong, C. H., Prabhu, N., Ozturk, M. B., Lim, Y. T., Sreekumar, L., Lengqvist, J., Tergaonkar, V., Kaldis, P., Sobota, R. M., Nordlund, P.
American Association for the Advancement of Science (AAAS)
Published 2018Staff ViewPublication Date: 2018-03-09Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyGeosciencesComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Biochemistry, Molecular BiologyPublished by: -
3R F Huang, Y X Dai, Z H Zhai, Z Wang, J J Zhou and X W Luo
Institute of Physics (IOP)
Published 2018Staff ViewPublication Date: 2018-07-31Publisher: Institute of Physics (IOP)Print ISSN: 1755-1307Electronic ISSN: 1755-1315Topics: GeographyGeosciencesPhysicsPublished by: -
4Y. J. Liu ; H. Xu ; W. J. Kong ; M. Shang ; H. X. Dai ; J. Q. Yu
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-11-11Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Air ; Amides/chemistry ; Carbon/*chemistry ; Catalysis ; Chemistry, Pharmaceutical/*methods ; Heterocyclic Compounds/*chemistry ; Hydrogen/*chemistry ; Nitrogen/chemistry ; Oxidants/chemistry ; Palladium/chemistry ; Phosphorus/chemistry ; Sulfur/chemistryPublished by: -
5A. A. Soluyanov ; D. Gresch ; Z. Wang ; Q. Wu ; M. Troyer ; X. Dai ; B. A. Bernevig
Nature Publishing Group (NPG)
Published 2015Staff ViewPublication Date: 2015-11-27Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
6Staff View
Publication Date: 2018-05-17Publisher: Institute of Physics (IOP)Print ISSN: 1757-8981Electronic ISSN: 1757-899XTopics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsPublished by: -
7C. 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 2013Staff ViewPublication Date: 2013-03-16Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
8L. 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 2013Staff ViewPublication Date: 2013-11-30Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: 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/immunologyPublished by: -
9Su, Y., Pelz, C., Huang, T., Torkenczy, K., Wang, X., Cherry, A., Daniel, C. J., Liang, J., Nan, X., Dai, M.-S., Adey, A., Impey, S., Sears, R. C.
Cold Spring Harbor Laboratory Press
Published 2018Staff ViewPublication Date: 2018-11-02Publisher: Cold Spring Harbor Laboratory PressPrint ISSN: 0890-9369Topics: BiologyPublished by: -
10Z. 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 2014Staff ViewPublication Date: 2014-01-18Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
11X. Dai ; Z. Zhang ; Y. Jin ; Y. Niu ; H. Cao ; X. Liang ; L. Chen ; J. Wang ; X. Peng
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-11-05Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
12N. 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 2011Staff ViewPublication Date: 2011-11-18Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: *Biological Evolution ; *Genome, Plant ; Medicago truncatula/*genetics/*microbiology ; Molecular Sequence Data ; Nitrogen Fixation/genetics ; Rhizobium/*physiology ; Soybeans/genetics ; *Symbiosis ; Synteny ; Vitis/geneticsPublished by: -
13L. 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 2012Staff ViewPublication Date: 2012-03-01Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
14Li, Z. ; Foster, C. M. ; Dai, X.-H. ; Xu, X.-Z. ; Chan, S.-K. ; Lam, D. J.
[S.l.] : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: 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 ResourceURL: -
15Staff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: 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 ResourceURL: -
16El Marssi, M. ; Farhi, R. ; Dai, X. ; Morell, A. ; Viehland, D.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: 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 ResourceURL: -
17Xu, Z. ; Dai, X. H. ; Li, J. F. ; Viehland, Dwight
Woodbury, NY : American Institute of Physics (AIP)
Published 1997Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: 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 ResourceURL: -
18Viehland, Dwight ; Dai, X. H. ; Li, J. F. ; Xu, Z.
[S.l.] : American Institute of Physics (AIP)
Published 1998Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: 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 ResourceURL: -
19Johnson, R. B. ; Zebrowski, E. J. ; Dai, X.
Copenhagen : Munksgaard International Publishers
Published 2000Staff ViewISSN: 1600-0714Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: 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 ResourceURL: -
20Johnson, R. B. ; Streckfus, C. F. ; Dai, X. ; Tucci, M. A.
Oxford, UK : Blackwell Publishing Ltd
Published 1999Staff ViewISSN: 1600-0765Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: 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 ResourceURL: