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  • 1
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    Direct observation of nodes and twofold symmetry in FeSe superconductor (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-06-18
    Description: We investigated the electron-pairing mechanism in an iron-based superconductor, iron selenide (FeSe), using scanning tunneling microscopy and spectroscopy. Tunneling conductance spectra of stoichiometric FeSe crystalline films in their superconducting state revealed evidence for a gap function with nodal lines. Electron pairing with twofold symmetry was demonstrated by direct imaging of quasiparticle excitations in the vicinity of magnetic vortex cores, Fe adatoms, and Se vacancies. The twofold pairing symmetry was further supported by the observation of striped electronic nanostructures in the slightly Se-doped samples. The anisotropy can be explained in terms of the orbital-dependent reconstruction of electronic structure in FeSe.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Song, Can-Li -- Wang, Yi-Lin -- Cheng, Peng -- Jiang, Ye-Ping -- Li, Wei -- Zhang, Tong -- Li, Zhi -- He, Ke -- Wang, Lili -- Jia, Jin-Feng -- Hung, Hsiang-Hsuan -- Wu, Congjun -- Ma, Xucun -- Chen, Xi -- Xue, Qi-Kun -- New York, N.Y. -- Science. 2011 Jun 17;332(6036):1410-3. doi: 10.1126/science.1202226.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉State Key Laboratory for Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, the People's Republic of China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21680839" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
    Electronic Resource
    Electronic Resource
    Theoretical considerations on two-beam and multi-beam grazing-incidence X-ray diffraction: nonabsorbing cases (1989)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 45 (1989), S. 823-833 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Two-beam and symmetric three- and four-beam grazing-incidence X-ray diffraction (GIXD) by crystals without absorption are studied based on the dynamical theory of X-ray diffraction. For two-beam cases, a new geometrical scheme is given to reveal graphically the excitation of the dispersion surface. For symmetric three- and four-beam cases, the expressions for specularly reflected and forward diffracted intensities are derived analytically. Results from the numerical calculations for the diffracted intensities, the penetration depths, the coordinates of the dispersion surface and the mode excitations are also presented for two-, three- and four-beam GIXD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010876738900824X
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  • 3
    Electronic Resource
    Electronic Resource
    B-spaces (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 767 (1995), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Notes: : The recently formulated concept of B-spaces lies halfway between those of Morita's M-spaces and Ishii's M*-spaces on the one hand, and Nagami's Σ-spaces on the other, and shares with them most of the properties that have come to be expected of generalized metric spaces. We are to look into its stability with respect to the formation of countable products, sums, quasi-perfect images and pre-images and subspaces; the preservation of paracompactness over countable products within its confines and of course its metrization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1995.tb55896.x
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  • 4
    Electronic Resource
    Electronic Resource
    Engulfed pathogen-induced apoptosis in haemocytes of giant freshwater prawn, Macrobrachium rosenbergii (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of fish diseases 28 (2005), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Haemocytes of the giant freshwater prawn, Macrobrachium rosenbergii, were investigated for the induction of apoptosis after phagocytosis of pathogenic yeasts, bacteria and non-pathogenic latex beads in vitro. Isolated haemocytes of M. rosenbergii were cultured at a ratio of 1:50 haemocytes to pathogen with the yeast Debaryomyces hansenii, the bacteria Aeromonas hydrophila or Enterococcus faecium, or with latex beads at 25 °C for 2 h, followed by washing to remove free particles. At least 200 haemocytes were counted to determine the phagocytosis rate, and the results showed that haemocytes engulfed latex beads at a higher rate than the aquatic pathogens. By transmission electron microscopy, the yeast- or bacterium-engulfing haemocytes displayed morphological changes characteristic of apoptosis, including formation of cytoplasmic vacuoles, chromatin condensation and fragmentation of nuclei. This pathogen-induced apoptosis was further confirmed by DNA laddering and TUNEL (terminal deoxynucleotidyl transferase-mediated deoxy-UTP nick-end-labelling) assays. Neither haemocytes treated with latex beads nor uninfected haemocytes (control group) showed signs of apoptosis after 48 h in culture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.2005.00681.x
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  • 5
    Electronic Resource
    Electronic Resource
    Factorization of Metrizability (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 788 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Notes: A general method of factorization in introduced. It consists of, first, the weakening of the concept of an open base or that of a network, and, second, the restoration to the weakened concept its full vigor. Thus, every time, we have the restorative + the weakened concept = the original concept. The workings of the method are exceedingly simple. Its field of applications goes well beyond metrizability. Results include an improvement of Heath and Aull on the developability and metrizability of semistratifiable spaces. We also have that every Nagata space has a metrizable dense subset.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb36804.x
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  • 6
    Electronic Resource
    Electronic Resource
    Remarks on the geometric parameters in describing diffraction optics of asymmetric Bragg crystals (1995)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 28 (1995), S. 655-658 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: This communication gives the asymmetric factor b and deviation parameter η describing the diffraction geometry in a more general way including very asymmetric scattering arrangements. Darwin's parameter Y defined on the dispersion surface and the associated deviation parameter ηY given by the Takagi–Taupin equations are proposed to characterize the angular deviation from the exact resonance of Bragg diffraction. With respect to ηY of a high accuracy, the validity of conventional forms of the deviation parameter is further discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889895005899
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  • 7
    Electronic Resource
    Electronic Resource
    Angle calculations for a vertical-axis X-ray diffractometer (1992)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 25 (1992), S. 761-765 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A vertical z-axis-type diffractometer is proposed and its relations between motor angles and Miller indices are derived. For diffraction geometry at a grazing incident angle, reflections should be incorporated in diffractometry algorithms. Further remarks are included on the subject of surface X-ray scattering.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889892005776
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  • 8
    Electronic Resource
    Electronic Resource
    Relation of the Poynting vector normal to the dispersion surface (1993)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 793-794 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: This communication is devoted to the so-called Ewald–Kato theorem, which declares that the Poynting vector is normal to the dispersion surface. Instead of the long-accepted hyperbolic result, an exact relation, valid for the whole of the Bragg-diffraction dispersion surface, is now pursued.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767393004829
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  • 9
    Electronic Resource
    Electronic Resource
    FREQUENCY-INDEPENDENT INFINITE ELEMENTS FOR ANALYSING SEMI-INFINITE PROBLEMS (1996)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 39 (1996), S. 3553-3569 
    Details
    ISSN: 0029-5981
    Keywords: finite/infinite element method ; infinite element ; semi-infinite problem ; soil-structure interaction ; wave propagation ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Two drawbacks exist with the infinite elements used for simulating the unbounded domains of semi-infinite problems. The first is the lack of an adequate measure for calculating the decay parameter. The second is the frequency-dependent characteristic of the finite/infinite element mesh used for deriving the impedance matrices. Based on the properties of wave propagation, a scheme is proposed in this paper for evaluating the decay parameter. In addition, it is shown that by the method of dynamic condensation, the far-field impedance matrices for waves of lower frequencies can be obtained repetitively from the one for waves of the highest frequency, using exactly the same finite/infinite element mesh. Such an approach ensures that accuracy of the same degree can be maintained for waves of all frequencies within the range of consideration. Effectiveness of the proposed method is demonstrated in the numerical examples through comparison with previous results.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
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  • 10
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    Registration of ‘Jasmine 85’ Rice (1998)
    Wiley
    Details
    Publication Date: 1998-05-01
    Print ISSN: 0011-183X
    Electronic ISSN: 1435-0653
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
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