Search Results - (Author, Cooperation:X. C. Zhang)

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  1. 1
    Staff View
    Publication Date:
    2015-03-25
    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:
    Animals ; Female ; Forkhead Transcription Factors/deficiency/metabolism ; Hemiptera/*anatomy & histology/enzymology/genetics/*metabolism ; Insulin/metabolism ; Male ; Molecular Sequence Data ; Phosphatidylinositol 3-Kinases/metabolism ; Proto-Oncogene Proteins c-akt/metabolism ; Receptor, Insulin/deficiency/*metabolism ; Signal Transduction ; Wings, Animal/anatomy & histology/enzymology/*growth & development/*metabolism
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-04-11
    Publisher:
    Institute of Physics (IOP)
    Print ISSN:
    1755-1307
    Electronic ISSN:
    1755-1315
    Topics:
    Geography
    Geosciences
    Physics
    Published by:
    http://www.iop.org/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Q Yang, X C Zhang, F L Wang and J T Zou
    Institute of Physics (IOP)
    Published 2018
    Staff View
    Publication Date:
    2018-02-03
    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:
    http://www.iop.org/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Xing, J., Zhang, A., Minze, L. J., Li, X. C., Zhang, Z.
    The American Association of Immunologists (AAI)
    Published 2018
    Staff View
    Publication Date:
    2018-06-19
    Publisher:
    The American Association of Immunologists (AAI)
    Print ISSN:
    0022-1767
    Electronic ISSN:
    1550-6606
    Topics:
    Medicine
    Published by:
    http://www.aai.org/

    Latest Papers from Table of Contents or Articles in Press
  5. 5
    Z. Cheng ; J. F. Li ; Y. Niu ; X. C. Zhang ; O. Z. Woody ; Y. Xiong ; S. Djonovic ; Y. Millet ; J. Bush ; B. J. McConkey ; J. Sheen ; F. M. Ausubel
    Nature Publishing Group (NPG)
    Published 2015
    Staff View
    Publication Date:
    2015-03-04
    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:
    Arabidopsis/enzymology/*immunology/metabolism/*microbiology ; Arabidopsis Proteins/genetics/metabolism ; Flagellin/immunology ; Heterotrimeric GTP-Binding Proteins/metabolism ; Immunity, Innate ; MAP Kinase Signaling System ; Peptide Hydrolases/*metabolism/secretion ; Plant Immunity/*immunology ; Proteolysis ; Pseudomonas aeruginosa/*enzymology/*immunology/pathogenicity ; Receptors, Cell Surface/deficiency/genetics/metabolism
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  6. 6
    Staff View
    Publication Date:
    2018-01-20
    Publisher:
    American Physical Society (APS)
    Print ISSN:
    1050-2947
    Electronic ISSN:
    1094-1622
    Topics:
    Physics
    Keywords:
    Atomic and molecular collisions and interactions
    Published by:
    http://www.aps.org/

    Latest Papers from Table of Contents or Articles in Press
  7. 7
    S. Qiao ; Q. Luo ; Y. Zhao ; X. C. Zhang ; Y. Huang
    Nature Publishing Group (NPG)
    Published 2014
    Staff View
    Publication Date:
    2014-07-06
    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:
    Bacterial Outer Membrane Proteins/*chemistry/*metabolism ; Biological Transport ; Cell Membrane/chemistry/metabolism ; Crystallography, X-Ray ; Lipopolysaccharides/chemistry/*metabolism ; Models, Molecular ; Multiprotein Complexes/chemistry/metabolism ; Protein Binding ; Protein Structure, Secondary ; Shigella flexneri/*chemistry/cytology
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  8. 8
    Zhang, X.-C. ; Auston, D. H.

    [S.l.] : American Institute of Physics (AIP)
    Published 1992
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The basic concepts and preliminary applications of optically induced electromagnetic radiation from semiconductor surfaces and interfaces by using femtosecond optics are discussed. This submillimeter-wave radiation provides a novel optoelectronic technique to study semiconductor electronic surface and interface properties with a contactless approach. The amplitude and phase of the electromagnetic radiation from the semiconductor surfaces depend on carrier mobility, impurity doping concentration, and strength and polarity of the static internal field. A large selection of bulk, epitaxial layer and superlattice samples from III-V, II-VI and group-IV semiconductors has been tested. The orientation and strength of the static built-in fields of a wide range of semiconductor surfaces, such as surface depletion, metal/semiconductor Schottky, p-n junction and strain-induced piezoelectric fields, can be determined and estimated.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.350710

    Articles: DFG German National Licenses
  9. 9
    Froberg, N. ; Mack, M. ; Hu, B. B. ; Zhang, X.-C. ; Auston, D. H.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1991
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    When illuminated by a train of properly spaced ultrashort optical pulses, an array of short photoconducting dipole antennas emits a submillimeter wave beam which can be electrically steered by varying the periodicity of the voltage bias applied to the individual antenna elements.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.104629

    Articles: DFG German National Licenses
  10. 10
    Shu, C. ; Zhang, X.-C. ; Yang, E. S. ; Auston, D. H.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We have developed a technique to generate a two-dimensional array of optical beams with equal intensities and a constant sequential time delay from a mode-locked laser. A light modulator was used to code the spatially separated beams, which were then multiplexed to form a serial pulse string. With the multiplexed beam focused on a picosecond photoconductor, an ultrafast electrical signal was generated.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.103745

    Articles: DFG German National Licenses
  11. 11
    Zhang, X.-C. ; Hu, B. B. ; Xin, S. H. ; Auston, D. H.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The strain generated electric field in a 〈111〉 oriented misfit superlattice provides a suitable bias for generating optically induced femtosecond electromagnetic radiation. We have measured the electromagnetic radiation from GaSb/AlSb strained-layer superlattices and GaSb thin films; extremely fast electromagnetic pulses from 〈111〉 oriented superlattices have been observed. Because the quantum well structure in the superlattice samples limits the pulse duration of the transient photocurrent, it is possible to generate electromagnetic radiation having a pulse duration comparable with the photocarrier transit time across the quantum well.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.103411

    Articles: DFG German National Licenses
  12. 12
    Hu, B. B. ; Froberg, N. ; Mack, M. ; Zhang, X.-C. ; Auston, D. H.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1991
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The radiation frequency of an electromagnetic wave from a spatial periodically biased photoconducting antenna array can be electrically scanned by varying the periodicity of the bias voltage on the antennas. Over 900 GHz frequency tuning bandwidth has been demonstrated.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.104311

    Articles: DFG German National Licenses
  13. 13
    Darrow, J. T. ; Zhang, X.-C. ; Auston, D. H.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1991
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We describe the power scaling and saturation properties of large-aperture planar photoconducting antennas which emit and detect ultrashort terahertz electromagnetic pulses. At high optical fluences, the radiated electric field saturates at a value comparable to the bias field in agreement with a simple model of the radiation mechanism.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.104426

    Articles: DFG German National Licenses
  14. 14
    Chen, Q. ; Zhang, X.-C.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1999
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Compared with the conventional laser amplitude modulation with a lock-in amplifier, the optical polarization modulation in optoelectronic generation and detection of a free-space terahertz (THz) radiation provides up to twofold increase of the dynamic range. The total laser power for the optoelectronic generation of THz beams can be fully utilized. © 1999 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.124119

    Articles: DFG German National Licenses
  15. 15
    Hu, B. B. ; Zhang, X.-C. ; Auston, D. H.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We present observation of temperature dependence of optically induced femtosecond electromagnetic radiation from several semiconductors. When the sample temperature decreases from 280 to 80 K, over 4 times and 21 times increases of the radiated peak field and radiated energy have been found. A large shift of the frequency spectrum of the radiation was observed when the InSb sample temperature was tuned over this range.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.103829

    Articles: DFG German National Licenses
  16. 16
    Hu, B. B. ; Darrow, J. T. ; Zhang, X.-C. ; Auston, D. H. ; Smith, P. R.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    When illuminated by ultrashort optical pulses, large aperture planar photoconductors are shown to radiate a directional electromagnetic pulse which can be steered by varying the angle of incidence of the optical beam.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.102618

    Articles: DFG German National Licenses
  17. 17
    Hu, B. B. ; Zhang, X.-C. ; Auston, D. H. ; Smith, P. R.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We describe a technique to extract electro-optic Cherenkov radiation from a LiTaO3 crystal into free space. This permits the generation of collimated beams of terahertz radiation into free space and overcomes previous limitations imposed by total internal reflection.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.103299

    Articles: DFG German National Licenses
  18. 18
    Gui, Y. S. ; Zheng, G. Z. ; Chu, J. H. ; Guo, S. L. ; Zhang, X. C. ; Tang, D. Y.

    [S.l.] : American Institute of Physics (AIP)
    Published 1997
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The subband dispersion relations have been computed as a function of the surface electron concentration in the accumulation layers of n-Hg1−xCdxTe photoconductive detectors, while the mobility and concentration for all kinds of carriers in the subband are determined from Shubnikov-de Haas (SdH) oscillation measurements and quantitative mobility spectrum analysis (QMSA). The results show that the QMSA can provide accurate electric parameters for all kinds of carriers in the subband without considering the complex energy band in the semiconductors, while the SdH oscillation can only offer qualitative data because the analysis is based on parabolic energy band approximation. © 1997 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.366369

    Articles: DFG German National Licenses
  19. 19
    Zhang, X.-C. ; Darrow, J. T. ; Hu, B. B. ; Auston, D. H. ; Schmidt, M. T. ; Tham, P. ; Yang, E. S.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Ultrafast electromagnetic radiation induced by a femtosecond laser beam from a semiconductor provides determination of the impurity doping concentration, carrier mobility, sign, and strength of the depletion field near the semiconductor surface.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.102952

    Articles: DFG German National Licenses
  20. 20
    Shu, C. ; Hu, B. B. ; Zhang, X.-C. ; Mei, P. ; Yang, E. S.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Using autocorrelation measurement, we have studied the picosecond photoconductivity of as-deposited, fine-grain polycrystalline silicon thin films. A strong correlation between photoconductive decay time and polycrystalline silicon deposition temperature has been observed. The fastest autocorrelated photoconductive response is 9 ps full width at half maximum, and is obtained from a polycrystalline silicon sample deposited at 590 °C. We estimated the carrier mobility from the peak autocorrelated current, as well as from the average photocurrent of a single gap. These two values show a large difference for samples deposited at relatively high temperatures, which can be explained by imperfect metal-semiconductor ohmic contacts.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.103579

    Articles: DFG German National Licenses