Now showing items 63-82 of 729

  • Casimir stress in an inhomogeneous medium 

    Philbin, Thomas G.; Xiong, C.; Leonhardt, Ulf (Elsevier Masson, 2010)
    The Casimir effect in an inhomogeneous dielectric is investigated using Lifshitz's theory of electromagnetic vacuum energy. A permittivity function that depends continuously on one Cartesian coordinate is chosen, bounded ...
  • Characterisation of a fibre optic Raman probe within a hypodermic needle. 

    Iping Petterson, IE; Day, JC; Fullwood, LM; Gardner, B; Stone, N (Springer Verlag, 2015-09-28)
    We demonstrate the first use of a multifibre Raman probe that fits inside the bore of a hypodermic needle. A Raman probe containing multiple collection fibres provides improved signal collection efficiency in biological ...
  • Characterisation of signal enhancements achieved when utilizing a photon diode in deep Raman spectroscopy of tissue 

    Vardaki, Martha Z.; Matousek, Pavel; Stone, Nicholas (Optical Society of America, 2016)
    We characterise the performance of a beam enhancing element (‘photon diode’) for use in deep Raman spectroscopy (DRS) of biological tissues. The optical component enhances the number of laser photons coupled into a ...
  • Characterising stellar micro-variability for planetary transit searches 

    Aigrain, Suzanne; Favata, F.; Gilmore, G. (EDP Sciences, 2004)
    A method for simulating light curves containing stellar micro-variability for a range of spectral types and ages is presented. It is based on parameter-by-parameter scaling of a multi-component fit to the solar irradiance ...
  • Characterization of spin-valves fabricated on opaque substrates by optical ferromagnetic resonance 

    Barman, A.; Kruglyak, V.V.; Hicken, R.J.; Marrows, C.H.; Ali, M.; Hindmarch, A.T.; Hickey, B.J. (American Institute of Physics, 2002)
    We have used a transmission line deposited on a transparent substrate to deliver an optically triggered magnetic field pulse to a spin valve structure deposited upon an opaque substrate. The ensuing ferromagnetic resonance ...
  • Characterization of the angular memory effect of scattered light in biological tissues. 

    Schott, S; Bertolotti, J; Léger, JF; Bourdieu, L; Gigan, S (Optical Society of America, 2015-05-18)
    High resolution optical microscopy is essential in neuroscience but suffers from scattering in biological tissues and therefore grants access to superficial brain layers only. Recently developed techniques use scattered ...
  • Characterization of the Atmosphere of the Hot Jupiter HAT-P-32Ab and the M-dwarf Companion HAT-P-32B 

    Zhao, Ming; O'Rourke, Joseph G.; Wright, Jason T.; Knutson, H.; Burrows, A.S.; Fortney, J.J.; Ngo, Henry; Fulton, Benjamin J.; Baranec, Christoph; Riddle, Reed; Law, Nicholas M.; Muirhead, Philip S.; Hinkley, Sasha; Showman, A.P.; Curtis, Jason; Burruss, Rick (American Astronomical Society / IoP Publishing, 2014)
    We report secondary eclipse photometry of the hot Jupiter HAT-P-32Ab, taken with Hale/Wide-field Infra-Red Camera (WIRC) in H and KS bands and with Spitzer/IRAC at 3.6 and 4.5 μm. We carried out adaptive optics imaging of ...
  • Chemically specific imaging and in-situ chemical analysis of articular cartilage with stimulated Raman scattering 

    Mansfield, Jessica; Moger, Julian; Green, Ellen; Moger, C; Winlove, C. Peter (Wiley-VCH Verlag, 2013-01-10)
    Stimulated Raman scattering (SRS) has been applied to unstained samples of articular cartilage enabling the investigation of living cells within fresh tissue. Hyperspectral SRS measurements over the CH vibrational region ...
  • Chemico mechanical imaging of Barrett's oesophagus 

    Palombo, F; Madami, M; Fioretto, D; Nallala, J; Barr, H; David, A; Stone, N (Wiley-VCH Verlag, 2016)
    Barrett’s oesophagus is a condition characterized by a change in the lining of the oesophagus that markedly increases the risk of adenocarcinoma. We demonstrate the first site-matched application of Brillouin microscopy, ...
  • CHIMPS: the 13CO/C18O (J = 3 → 2) Heterodyne Inner Milky Way Plane Survey 

    Rigby, AJ; Moore, TJT; Plume, R; Eden, DJ; Urquhart, JS; Thompson, MA; Mottram, JC; Brunt, CM; Butner, HM; Dempsey, JT; Gibson, SJ; Hatchell, J; Jenness, T; Kuno, N; Longmore, SN; Morgan, LK; Polychroni, D; Thomas, H; White, GJ; Zhu, M (Oxford University Press, 2016-03-01)
    We present the 13CO/C18O (J = 3 → 2) Heterodyne Inner Milky Way Plane Survey (CHIMPS) which has been carried out using the Heterodyne Array Receiver Program on the 15 m James Clerk Maxwell Telescope (JCMT) in Hawaii. The ...
  • Chitosan amphiphile coating of peptide nanofibres reduces liver uptake and delivers the peptide to the brain on intravenous administration. 

    Lalatsa, A; Schätzlein, Andreas G.; Briggs, M; Godfrey, L; Iannitelli, A; Uchegbu, Ijeoma F.; Garrett, Natalie; Moger, Julian; Freeman, Jay (Elsevier, 2015-01-10)
    The clinical development of neuropeptides has been limited by a combination of the short plasma half-life of these drugs and their ultimate failure to permeate the blood brain barrier. Peptide nanofibres have been used to ...
  • Circularly polarized colour reflection from helicoidal structures in the beetle Plusiotis boucardi 

    Jewell, Sharon A.; Vukusic, Peter; Roberts, N. W. (Institute of Physics and Deutsche Physikalische Gesellschaft, 2007)
    A detailed optical study of the iridescent outer-shell of the beetle Plusiotis boucardi has revealed a novel microstructure which controls both the polarization and wavelength of reflected light. A previously unreported ...
  • 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" ...
  • 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 ...