Now showing items 103-122 of 996

  • Clostridium perfringens epsilon toxin H149A mutant as a platform for receptor binding studies 

    Bokori-Brown, Monika; Kokkinidou, Maria C.; Savva, Christos G.; Fernandes da Costa, Sérgio P.; Naylor, Claire E.; Cole, Ambrose R.; Moss, David S.; Basak, Ajit K.; Titball, Richard W. (Wiley, 2013-05)
    Clostridium perfringens epsilon toxin (Etx) is a pore-forming toxin responsible for a severe and rapidly fatal enterotoxemia of ruminants. The toxin is classified as a category B bioterrorism agent by the U.S. Government ...
  • Clostridium perfringens α-toxin interaction with red cells and model membranes. 

    Jewell, Sharon A.; Titball, Richard W.; Huyet, J; Naylor, Claire E.; Basak, Ajit K.; Gologan, Petre; Winlove, C. Peter; Petrov, Peter G. (Royal Society of Chemistry, 2015-08-18)
    The effects of Clostridium perfringens α-toxin on host cells have previously been studied extensively but the biophysical processes associated with toxicity are poorly understood. The work reported here shows that the ...
  • Cloudless atmospheres for L/T dwarfs and extra-solar giant planets 

    Tremblin, Pascal; Amundsen, David S.; Chabrier, G.; Baraffe, I.; Drummond, B.; Hinkley, Sasha; Mourier, P.; Venot, O. (American Astronomical Society, 2016-01-28)
    The admitted, conventional scenario to explain the complex spectral evolution of brown dwarfs (BD) since their first detections twenty years ago, has always been the key role played by micron-size condensates, called "dust" ...
  • CO abundance variations in the Orion molecular cloud 

    Ripple, F; Heyer, MH; Gutermuth, R; Snell, RL; Brunt, CM (Oxford University Press, 2013-03-19)
    Infrared stellar photometry from the Two Micron All-Sky Survey (2MASS) and spectral line imaging observations of 12CO and 13CO J = 1-0 line emission from the Five College Radio Astronomy Observatory (FCRAO) 14-m telescope ...
  • Coacervation of α-elastin studied by ultrafast nonlinear infrared spectroscopy 

    Ragnoni, E; Palombo, F; Green, E; Winlove, C. Peter; Di Donato, M; Lapini, A (Royal Society of Chemistry, 2016-09-21)
    Elastin is the main protein to confer elasticity to biological tissues, through the formation of a hierarchical network of fibres. α-Elastin, a soluble form of the protein, is widely used in studies of the biosynthesis of ...
  • Coexisting Nematic and Smectic- A Phases in a Twisted Liquid-Crystal Cell 

    Ruan, Lizhen; Osipov, M. A.; Sambles, J. Roy (American Physical Society, 2001)
    Twisted homogeneously planar-aligned nematic liquid-crystal cells are cooled into the smectic- A phase. The expected defective structure does not form. Instead the cells still show good optical-guiding characteristics. ...
  • Coherence and measurement in quantum thermodynamics 

    Anders, Janet (Nature Publishing Group, 2016-02-26)
    Thermodynamics is a highly successful macroscopic theory widely used across the natural sciences and for the construction of everyday devices, from car engines to solar cells. With thermodynamics predating quantum theory, ...
  • Coherent nonlinear optical response of graphene 

    Hendry, Euan; Hale, Peter J.; Moger, Julian; Savchenko, A.K.; Mikhailov, S.A. (American Physical Society, 2010)
    We investigate the nonlinear optical properties of graphene flakes using four-wave mixing. The corresponding third-order optical susceptibility is found to be remarkably large and only weakly dependent on the wavelength ...
  • Coherent particle transfer in an on-demand single-electron source 

    Keeling, J.; Shytov, A.V.; Levitov, L.S. (American Physical Society, 2008)
    Electron transfer from a localized state in a quantum dot into a ballistic conductor generally results in particle-hole excitations. We study this effect, considering a resonance level with time-dependent energy coupled ...
  • Coherent phonon modes of crystalline and amorphous Ge2Sb2Te5 thin films: A fingerprint of structure and bonding 

    Shalini, Ashawaraya; Liu, Y.; Katmis, F.; Braun, W.; Srivastava, G.P.; Hicken, R.J. (American Institute of Physics (AIP), 2015)
    Femtosecond optical pump-probe measurements have been made upon epitaxial, polycrystalline, and amorphous thin films of Ge2Sb2Te5 (GST). A dominant coherent optical phonon mode of 3.4 THz frequency is observed in time-resolved ...
  • Collagen fiber arrangement in normal and diseased cartilage studied by polarization sensitive nonlinear microscopy 

    Mansfield, Jessica; Winlove, C. Peter; Moger, Julian; Matcher, Steve J. (Society of Photo-optical Instrumentation Engineers (SPIE), 2008)
    Second harmonic generation (SHG) and two-photon fluorescence (TPF) microscopy is used to image the intercellular and pericellular matrix in normal and degenerate equine articular cartilage. The polarization sensitivity of ...
  • Collapse of a molecular cloud core to stellar densities: stellar-core and outflow formation in radiation magnetohydrodynamic simulations 

    Bate, Matthew R.; Tricco, Terrence S.; Price, Daniel J. (Oxford University Press, 2013-11-07)
    We have performed smoothed particle radiation magnetohydrodynamic simulations of the collapse of rotating, magnetized molecular cloud cores to form protostars. The calculations follow the formation and evolution of the ...
  • Collective resonances in gold nanoparticle arrays 

    Auguié, Baptiste; Barnes, William L. (American Physical Society, 2008)
    We present experimental evidence of sharp spectral features in the optical response of 2D arrays of gold nanorods. A simple coupled dipole model is used to describe the main features of the observed spectral line shape. ...
  • Combined X-Ray and Fully Leaky Guided Mode Studies of the Smectic Layer and Optic Tensor Configuration in a Ferroelectric Liquid-Crystal Cell 

    Hodder, B.; Sambles, J. Roy; Jenkins, S.; Richardson, Robert M. (American Physical Society, 2000)
    X-ray scattering together with optical characterization using fully leaky guided modes have been used for the first time to study the same ferroelectric liquid-crystal cell. This enables direct calculation of an accurate ...
  • Combining radiative transfer and diffuse interstellar medium physics to model star formation 

    Bate, Matthew R.; Keto, Eric R. (Oxford University Press for Royal Astronomical Society, 2015-05-21)
    We present a method for modelling star-forming clouds that combines two different models of the thermal evolution of the interstellar medium (ISM). In the combined model, where the densities are low enough that at least ...
  • A common origin of magnetism from planets to white dwarfs 

    Isern, J; Garcia-Berro, E; Kulebi, B; Loren-Aguilar, P (Institute of Physics Publishing, 2017-02-17)
    Isolated magnetic white dwarfs have field strengths ranging from kilogauss to gigagauss. However, the origin of the magnetic field has not been hitherto elucidated. Whether these fields are fossil, hence the remnants of ...
  • Compact photonic-crystal superabsorbers from strongly absorbing media 

    Devarapu, Ganga Chinna Rao; Foteinopoulou, Stavroula (American Institute of Physics (AIP), 2013)
    We present a route to near-perfect absorption in compact photonic-crystal (PC) structures constructed from strongly absorbing media that are typically highly reflective in bulk form. Our analysis suggests that the key ...
  • A comparative ab initio study of superconductivity in the body centered tetragonal YC2and LaC2 

    Tütüncü, H.M.; Srivastava, G.P. (American Institute of Physics (AIP), 2015)
    Ab initio studies of the electronic band structure and phonon dispersion relations, using the planewave pseudopotential method and the density functional theory, have been made for the superconducting materials YC<inf>2</inf> ...
  • Comparative blind test of five planetary transit detection algorithms on realistic synthetic light curves 

    Moutou, C.; Pont, F.; Barge, P.; Aigrain, Suzanne; Auvergne, M.; Blouin, D.; Cautain, R.; Erikson, A.; Guis, V.; Guterman, P.; Irwin, Mike; Lanza, A. F.; Queloz, D.; Rauer, H.; Voss, H.; Zucker, S. (EDP Sciences, 2005)
    Because photometric surveys of exoplanet transits are very promising sources of future discoveries, many algorithms are being developed to detect transit signals in stellar light curves. This paper compares such algorithms ...
  • A comparison between Gaussian Process emulation and Genetic Algorithms for optimising energy use of buildings 

    Eames, ME; Wood, M; Challenor, Peter G. (-, 2015-12)
    Computing speed has increased greatly over recent years. Building designers can now simulate complex building models in a short time. However, even with short simulation times, building optimisation routines can still take ...