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Träfflista för sökning "WFRF:(Holland L.) srt2:(2005-2009)"

Sökning: WFRF:(Holland L.) > (2005-2009)

  • Resultat 1-10 av 16
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2.
  • Brown, Kevin M., et al. (författare)
  • Common sequence variants on 20q11.22 confer melanoma susceptibility
  • 2008
  • Ingår i: Nature Genetics. - : Springer Science and Business Media LLC. - 1546-1718 .- 1061-4036. ; 40:7, s. 838-840
  • Tidskriftsartikel (refereegranskat)abstract
    • We conducted a genome-wide association pooling study for cutaneous melanoma and performed validation in samples totaling 2,019 cases and 2,105 controls. Using pooling, we identified a new melanoma risk locus on chromosome 20 (rs910873 and rs1885120), with replication in two further samples (combined P < 1 x 10(-15)). The per allele odds ratio was 1.75 (1.53, 2.01), with evidence for stronger association in early-onset cases.
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3.
  • Holland, D. M. P., et al. (författare)
  • A study of the valence shell electronic structure of the 5-halouracils
  • 2008
  • Ingår i: Chemical Physics. - : Elsevier BV. - 0301-0104 .- 1873-4421. ; 352:1-3, s. 205-216
  • Tidskriftsartikel (refereegranskat)abstract
    • Valence shell photoelectron spectra of the 5-halouracils have been recorded using synchrotron radiation at photon energies of 40 and 80 eV. Photoelectron angular distributions have been determined and these provide an experimental means of deducing the extent to which the molecular orbitals possess predominantly sigma, pi or halogen np character. In chloro-, bromo- and iodouracil two peaks, associated with the essentially halogen atom lone-pair orbitals, have been observed. The separation between these peaks, and the value of their photoelectron asymmetry parameters at an excitation energy of 40 eV, are compared with results for the corresponding orbitals in the halobenzenes and halothiophenes. Vertical ionisation energies and spectral intensities have been evaluated using the many-body Green's function approach, thereby enabling theoretical spectra to be derived. Assignments have been proposed for most of the structure observed in the valence shell photoelectron spectra based upon the available experimental and theoretical evidence.
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4.
  • Holland, D. M. P., et al. (författare)
  • A study of the valence shell electronic structure of uracil and the methyluracils
  • 2008
  • Ingår i: Chemical Physics. - : Elsevier BV. - 0301-0104 .- 1873-4421. ; 353:1-3, s. 47-58
  • Tidskriftsartikel (refereegranskat)abstract
    • The valence shell photoelectron spectra of uracil, 1-methyluracil and 6-methyluracil have been studied experimentally and theoretically. Synchrotron radiation has been used to record spectra at photon energies of 40 and 80 eV. Photoelectron angular distributions have been determined and these provide an experimental means of distinguishing between sigma- and pi-type orbitals. Vertical ionization energies and spectral intensities have been evaluated using the many-body Green's function approach, thereby enabling theoretical photoelectron spectra to be derived. The calculated spectra display a satisfactory agreement with the experimental data and this has allowed most of the photoelectron bands to be assigned. Two of the outer-valence vertical ionization energies are similar to one another and the vibrational progressions associated with these transitions overlap strongly. Vibronic interaction between these states, induced through the excitation of out-of-plane vibrational modes, may lead to nonadiabatic effects. Preliminary theoretical investigation of this interaction has been performed.
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6.
  • Decleva, P., et al. (författare)
  • Perfluoro effects in the occupied and virtual valence orbitals of hexafluorobenzene
  • 2007
  • Ingår i: Journal of Physics B. - : IOP Publishing. - 0953-4075 .- 1361-6455. ; 40:14, s. 2939-2959
  • Tidskriftsartikel (refereegranskat)abstract
    • The complete valence shell photoelectron spectrum of hexafluorobenzene has been recorded with synchrotron radiation and the observed structure has been interpreted using ab initio ionization energies and relative spectral intensities. The theoretical predictions for the single-hole ionic states due to outer valence shell ionization agree satisfactorily with the experimental results. Ionization from the inner valence, essential F 2s, orbitals is strongly influenced by many-body effects and the intensity is spread amongst numerous satellites. Photoelectron angular distributions and branching ratios have been determined both experimentally and theoretically, and demonstrate that shape resonances affect the valence shell photoionization dynamics. Some of the shape resonances have been associated with virtual valence orbitals. An assessment of the perfluoro effect on the occupied and virtual valence orbitals of hexafluorobenzene has been carried out by comparing the present results for C6F6 with similar data for C6H6.
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8.
  • House, J, et al. (författare)
  • Climate and air quality
  • 2006
  • Ingår i: Millennium Ecosystem Assessment 2005 - Current State and Trends. Findings of the Condition and Trends Working Group (Ecosystems and Human Well-being). ; 1, s. 350-390
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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10.
  • Mills, G., et al. (författare)
  • A synthesis of AOT40-based response functions and critical levels of ozone for agricultural and horticultural crops
  • 2007
  • Ingår i: Atmospheric Environment. - : Elsevier BV. - 1352-2310. ; 41:12, s. 2630-2643
  • Tidskriftsartikel (refereegranskat)abstract
    • Crop-response data from over 700 published papers and conference proceedings have been analysed with the aim of establishing ozone dose-response functions for a wide range of European agricultural and horticultural crops. Data that met rigorous selection criteria (e.g. field-based, ozone concentrations within European range, full season exposure period) were used to derive AOT40-yield response functions for 19 crops by first converting the published ozone concentration data into AOT40 (AOT40 is the hourly mean ozone concentration accumulated over a threshold ozone concentration of 40ppb during daylight hours, units ppmh). For any individual crop, there were no significant differences in the linear response functions derived for experiments conducted in the USA or Europe, or for individual cultivars. Three statistically independent groups were identified: ozone sensitive crops (wheat, water melon, pulses, cotton, turnip, tomato, onion, soybean and lettuce); moderately sensitive crops (sugar beet, potato, oilseed rape, tobacco, rice, maize, grape and broccoli) and ozone resistant (barley and fruit represented by plum and strawberry). Critical levels of a 3 month AOT40 of 3 ppm It and a 3.5 month AOT40 of 6ppm h were derived from the functions for wheat and tomato, respectively. (c) 2006 Elsevier Ltd. All rights reserved.
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