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See detailHigh-energy forward scattering and the pomeron: Simple pole versus unitarized models
Cudell, Jean-René ULg; Ezhela, V.; Kang, K. et al

in Physical Review. D : Particles and Fields (2000), 61

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See detailHigh-energy hadron spin-flip amplitude at small momentum transfer and new A(N) data from RHIC
Cudell, Jean-René ULg; Predazzi, E.; Selyugin, Oleg Viktorovich

in European Physical Journal A -- Hadrons & Nuclei (2004), 21(3), 479-486

In the case of elastic high-energy hadron-hadron scattering, the impact of the large-distance contributions on the behaviour of the slopes of the spin-non-flip and of the spin-flip amplitudes is analysed ... [more ▼]

In the case of elastic high-energy hadron-hadron scattering, the impact of the large-distance contributions on the behaviour of the slopes of the spin-non-flip and of the spin-flip amplitudes is analysed. It is shown that the long tail of the hadronic potential in impact parameter space leads to a value of the slope of the reduced spin-flip amplitude larger than that of the spin-non-flip amplitude. This effect is taken into account in the calculation of the analysing power in proton-nucleus reactions at high energies. It is shown that the preliminary measurement of A(N) (for p 12C obtained by the E950 Collaboration indeed favours a spin-flip amplitude with a large slope. Predictions for A)(N) (at P)(L) = 250 GeV/c are given. [less ▲]

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See detailHigh-Energy Physics with Particles Carrying Non-Zero Orbital Angular Momentum
Ivanov, Igor ULg

in Few-Body Systems (2011)

Thanks to progress in optics in the past two decades, it is possible to create photons carrying well-defined non-zero orbital angular momentum (OAM). Boosting these photons into high-energy range ... [more ▼]

Thanks to progress in optics in the past two decades, it is possible to create photons carrying well-defined non-zero orbital angular momentum (OAM). Boosting these photons into high-energy range preserving their OAM seems feasible. Intermediate energy electrons with OAM have also been produced recently. One can, therefore, view OAM as a new degree of freedom in high-energy collisions and ask what novel insights it can bring. Here we discuss generic features of scattering processes involving twisted particles in the initial state. We show that they make it possible to perform a Fourier analysis of a plane wave cross section with respect to the azimuthal angles of the initial particles, and to probe the autocorrelation function of the amplitude, a quantity inaccessible in plane wave collisions. [less ▲]

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See detailHigh-energy X-ray tomography analysis of a metal packing biofilm reactor for the production of lipopeptides by Bacillus subtilis
Zune, Quentin ULg; Soyeurt, Delphine; Toye, Dominique ULg et al

in Journal of Chemical Technology & Biotechnology (2014), 89

BACKGROUND: Whereas multi-species biofilm reactors are commonly used for the treatment of liquid and solid wastes, new strategies are progressing for the development of single species biofilm for the ... [more ▼]

BACKGROUND: Whereas multi-species biofilm reactors are commonly used for the treatment of liquid and solid wastes, new strategies are progressing for the development of single species biofilm for the production of high-value metabolites. Technically, this new concept relies on the design of bioreactors able to promote biofilm formation and on the identification of the key physico-chemical parameters involved in biofilm formation. RESULTS: An experimental setting comprising a liquid continuously recirculated on a metal structured packing has been used to promote Bacillus subtilis GA1 biofilm formation. The colonization of the packing has been visualized non-invasively by X-ray tomography. This analysis revealed an uneven, conical, distribution of the biofilm inside the packing. Compared with a submerged culture carried out in a stirred tank reactor, significant modification of the lipopeptide profile has been observed in the biofilm reactorwith the disappearance of fengycin and iturin fractions and an increase of the surfactin fraction. In addition, considering the biofilm reactor design, no foam formation has been observed during the culture. CONCLUSIONS: The configuration of this biofilm reactor set-up allows for a higher surfactin production by comparison with a submerged culture while avoiding foam formation. Additionally, scale-up could easily be performed by increasing the number of packing elements. [less ▲]

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See detailHigh-field magnetization of U2T2X compounds (T = Co, Ni, Rh, Pd, Ir, Pt and X = In, Sn)
Nakotte, Heinz; Prokes, Karel; Brück, E. et al

Poster (1993, November)

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See detailHigh-field magnetization of U2T2X compounds (T = Co, Rh, Ni, Pd, Ir, Pt and X = In, Sn)
Nakotte, Heinz; Prokes, Karel; Brück, E. et al

in Physica B: Condensed Matter (1994), 201

Structure parameters and magnetization in quasistatic fields up to 38 T at 4.2 K are reported for U2T2X compounds with T = Co, Rh, Ni, Pd, Ir, Pt and X = In, Sn, which crystalline in the tetragonal U3Si2 ... [more ▼]

Structure parameters and magnetization in quasistatic fields up to 38 T at 4.2 K are reported for U2T2X compounds with T = Co, Rh, Ni, Pd, Ir, Pt and X = In, Sn, which crystalline in the tetragonal U3Si2 structure. Even the highest applied fields are not sufficient to achieve saturation of the magnetization in any of these compounds of which the majority is antiferromagnetic and some are Pauli paramagnets. The importance of 5f-ligand hybridization for the magnetism in these compounds is discussed. [less ▲]

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See detailHigh-frequency A-type pulsators discovered using SuperWASP
Holdsworth, Daniel L.; Smalley, B.; Gillon, Michaël ULg et al

in Monthly Notices of the Royal Astronomical Society (2014)

We present the results of a survey using the WASP archive to search for high-frequency pulsations in F-, A- and B-type stars. Over 1.5 million targets have been searched for pulsations with amplitudes ... [more ▼]

We present the results of a survey using the WASP archive to search for high-frequency pulsations in F-, A- and B-type stars. Over 1.5 million targets have been searched for pulsations with amplitudes greater than 0.5 millimagnitude. We identify over 350 stars which pulsate with periods less than 30 min. Spectroscopic follow-up of selected targets has enabled us to confirm 10 new rapidly oscillating Ap stars, 13 pulsating Am stars and the fastest known δ Scuti star. We also observe stars which show pulsations in both the high-frequency domain and the low-frequency δ Scuti range. This work shows the power of the WASP photometric survey to find variable stars with amplitudes well below the nominal photometric precision per observation. [less ▲]

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See detailHigh-Frequency Integral Equation Solver for 3-D Wave Scattering Around Convex Obstacles
Geuzaine, Christophe ULg; Bruno, Oscar; V Sabariego, Ruth ULg et al

in Proceedings of 6ème Conférence Européenne sur les Méthodes Numériques en Electromagnétisme (NUMELEC2008) (2008)

We present a numerical method for the computation of wave scattering by convex three-dimensional obstacles, which exhibits a bounded computational complexity for arbitrarily high frequencies. The method ... [more ▼]

We present a numerical method for the computation of wave scattering by convex three-dimensional obstacles, which exhibits a bounded computational complexity for arbitrarily high frequencies. The method is based on a combination of a high-frequency ansatz for the unknown density in a boundary integral formulation of the problem, and an extension of the ideas of the method of stationary phase to allow for the efficient integration of oscillatory functions. The method builds upon the ideas proposed in [2] and [1]. [less ▲]

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See detailHigh-Frequency Integral Equation Solvers for Acoustic and Electromagnetic Scattering Problems
Geuzaine, Christophe ULg

Scientific conference (2007, December 12)

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See detailHigh-Frequency Integral Equation Solvers for Acoustic and Electromagnetic Scattering Problems
Geuzaine, Christophe ULg

Scientific conference (2008, February 14)

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See detailHigh-Frequency Integral Equation Solvers for Acoustic and Electromagnetic Scattering Problems
Geuzaine, Christophe ULg

Scientific conference (2008, February 29)

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See detailHigh-frequency oscillatory ventilation in neonatal RDS:initial volume optimization an respiratory mechanics
Masendu, Kalenga; Battisti, Oreste ULg; Bertrand, jean-marie et al

in Journal of Applied Physiology (1998), 84

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See detailHigh-frequency ventilation in cats: technical data
Clercx, Cécile ULg; Lekeux, Pierre ULg; Degroote, A. et al

in 4th Comparative Respiratory Society meeting - Anaheim California - USA (1985)

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See detailHigh-Grade Pleomorphic T Cell Lymphoma with Restricted Involvement of Skin and Bone Marrow
Gautier, M. S.; Pierard, Gérald ULg; Andrien, Francine ULg et al

in Dermatology : International Journal for Clinical & Investigative Dermatology (1993), 186(4), 287-9

Pleomorphic T cell lymphoma of the medium to large cell type expressing CD30 antigen is a most aggressive peripheral T cell lymphoma. Currently, there is no satisfactory treatment available for this ... [more ▼]

Pleomorphic T cell lymphoma of the medium to large cell type expressing CD30 antigen is a most aggressive peripheral T cell lymphoma. Currently, there is no satisfactory treatment available for this neoplasm. We report the case of a woman with prominent skin and bone marrow involvement without detectable lymph node localization. This unusual presentation of disease responded well to polychemotherapy combined with autologous bone marrow transplantation. [less ▲]

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See detailHigh-latitude ion transport and energetic explorer (HI-LITE): a mission to investigate ion outflow from the high-latitude ionosphere
Smith, Mark F; Herrero, Federico A; Hesse, Michael et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1993, July 01)

The proposed HI-LITE Explorer will investigate the global ion outflow from the high-latitude ionosphere, its relationship to auroral features, and the consequences of this outflow on magnetospheric ... [more ▼]

The proposed HI-LITE Explorer will investigate the global ion outflow from the high-latitude ionosphere, its relationship to auroral features, and the consequences of this outflow on magnetospheric processes. The unique nature of the HI-LITE Explorer images will allow temporal and spatial features of the global ion outflow to be determined. The mission's scientific motivation comes from the fundamental role high-latitude ionospheric ions play in the dynamics of the solar wind driven magnetospheric-ionospheric system. These outflows are a major source of plasma for the magnetosphere and it is believed they play an important role in the triggering of substorms. In addition this paper describes the HI-LITE spacecraft and instruments. [less ▲]

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See detailHigh-latitude nitric oxide in the lower thermosphere
Gérard, Jean-Claude ULg; Barth, C. A.

in Journal of Geophysical Research (1977), 82

High-latitude observations of fluorescent nitric oxide gamma bands were made before and during a strong magnetic storm with the Ogo 4 ultraviolet spectrometer. Brightness measurements of the (1-0) gamma ... [more ▼]

High-latitude observations of fluorescent nitric oxide gamma bands were made before and during a strong magnetic storm with the Ogo 4 ultraviolet spectrometer. Brightness measurements of the (1-0) gamma band of nitric oxide indicate a slow buildup of NO during the disturbed period. The NO column density reaches a value as high as a factor of 8 greater than the midlatitude value and shows no correlation with the brightness of the instantaneous aurora. A time-dependent model calculation indicates that the ionization and dissociation of N2 by auroral electrons can increase the NO and N(4-S) densities. This increase is dependent on the intensity and duration of the auroral precipitation and on the branching ratio of N(2-D) production by dissociation of N2. A steady state is not reached for NO until 100,000 sec in an aurora characterized by an energy flux of 10 ergs per sq cm sec. Dissociation by the solar ultraviolet radiation competes with horizontal and vertical transport as a loss process for the nitric oxide produced by the aurora. A high NO(plus)/O2(plus) ratio is to be expected in the period following a strong auroral precipitation. [less ▲]

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See detailHigh-level biosynthesis of the anteiso-C(17) isoform of the antibiotic mycosubtilin in Bacillus subtilis and characterization of its candidacidal activity.
Fickers, Patrick ULg; Guez, Jean-Sebastien; Damblon, Christian ULg et al

in Applied and Environmental Microbiology (2009), 75(13), 4636-40

High-level production (880 mg liter(-1)) and isolation of the anteiso-C(17) isoform of the lipopeptide mycosubtilin produced by a genetically engineered Bacillus subtilis strain are reported. Antifungal ... [more ▼]

High-level production (880 mg liter(-1)) and isolation of the anteiso-C(17) isoform of the lipopeptide mycosubtilin produced by a genetically engineered Bacillus subtilis strain are reported. Antifungal activity of this isoform, as determined via culture and fluorometric and cell leakage assays, suggests its potential therapeutic use as an antifungal agent, in particular against Candida spp. [less ▲]

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See detailHigh-level production of extracellular lipase by Yarrowia lipolytica mutants from methyl oleate
Darvishi, F.; Destain, Jacqueline ULg; Nahvi, I. et al

in New Biotechnology (2011), 28(6), 756-760

Detailed reference viewed: 12 (1 ULg)