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See detailHigh Resolution Photoabsorption Spectroscopy of CH3Br, CH3I and their Isotopomers.
Locht, Robert ULg; Leyh, Bernard ULg; Jochims, H.-W. et al

Book published by Berliner Elektronen Speicherring für Synchrotron Strahlung m.b.H - sur CD-ROM (2002)

Several spectral regions in the Vacuum UV have been recorde under high resolution conditions: i.e. 8.185-8.210 eV (2e->5pa1 Rydberg transition) in CH(D)3Br and 7.300-7.325 eV in CH(D)3I (2e->6pa1 Rydberg ... [more ▼]

Several spectral regions in the Vacuum UV have been recorde under high resolution conditions: i.e. 8.185-8.210 eV (2e->5pa1 Rydberg transition) in CH(D)3Br and 7.300-7.325 eV in CH(D)3I (2e->6pa1 Rydberg transition). These spectra were recorded with 50µeV resolution. Structures separated by 100-150 µeV are observed and are shown to be isotope dependent. [less ▲]

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See detailHigh Resolution Photoabsorption Spectroscopy of the three Methyl Halides. Tests and first Results.
Locht, Robert ULg; Jochims, H.-W.; Baumgärtel, H.

Book published by Berliner Elektronen Speicherring für Synchrotron Strahlung m.b.H - on CD-ROM (2002)

The photoaborption spectrum of the monohalogenated methanes has been remeasured by using a new 3m-NIM monochromator under high resolution conditions. Many structures in the 10 eV photon energy range are ... [more ▼]

The photoaborption spectrum of the monohalogenated methanes has been remeasured by using a new 3m-NIM monochromator under high resolution conditions. Many structures in the 10 eV photon energy range are very well resolved and compared with previous very high resolution data. [less ▲]

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See detailHigh resolution saturated hydraulic conductivity logging of friable to poorly indurated borehole cores using air permeability measurements
Rogiers, Bart; Winters, P.; Huysmans, Marijke et al

in Hydrogeology Journal (2014)

Saturated hydraulic conductivity (Ks) is one of the most important parameters determining groundwater flow and contaminant transport in both unsaturated and saturated porous media. This paper investigates ... [more ▼]

Saturated hydraulic conductivity (Ks) is one of the most important parameters determining groundwater flow and contaminant transport in both unsaturated and saturated porous media. This paper investigates the hand-held air permeameter technique for high resolution hydraulic conductivity determination on borehole cores using a spatial resolution of ~0.05 m. We test the suitability of such air permeameter measurements on friable to poorly indurated sediments to improve the spatial prediction of classical laboratory based Ks measurements obtained at a much lower spatial resolution (~2 m). About 368 Ks measurements were made on ~350 m of borehole cores originating from the Campine basin, Northern Belgium, while ~5230 air permeability measurements were performed on the same cores. The heterogeneity in sediments, ranging from sand to clayey sand with distinct clay lenses, resulted in a Ks range of seven orders of magnitude. Cross-validation demonstrated that using air permeameter data as secondary variable and laboratory based Ks measurements as primary variable increased performance from R2 = 0.35 for ordinary kriging (laboratory Ks only) to R2 = 0.61 for co-kriging. Due to the large degree of small-scale variability detected by the air permeameter, the spatial granularity in the predicted laboratory Ks also increases drastically. The separate treatment of Kh and Kv revealed considerable anisotropy in certain lithostratigraphical units, while others where clearly isotropic at the sample scale. Air permeameter measurements on borehole cores provide a cost-effective way to improve spatial predictions of traditional laboratory based Ks. [less ▲]

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See detailHigh resolution skin colorimetry, strain mapping and mechanobiology.
Devillers, C.; Pierard, Claudine ULg; Schreder, A. et al

in International Journal of Cosmetic Science (2010), 32(4), 241-5

SYNOPSIS: Skin colours are notoriously different between individuals. They are governed by ethnicities and phototypes, and further influenced by a variety of factors including photoexposures and sustained ... [more ▼]

SYNOPSIS: Skin colours are notoriously different between individuals. They are governed by ethnicities and phototypes, and further influenced by a variety of factors including photoexposures and sustained mechanical stress. Indeed, mechanobiology is a feature affecting the epidermal melanization. High-resolution epiluminescence colorimetry helps in deciphering the effects of forces generated by Langer's lines or relaxed skin tension lines on the melanocyte activity. The same procedure shows a prominent laddering pattern of melanization in striae distensae contrasting with the regular honeycomb pattern in the surrounding skin. [less ▲]

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See detailHigh Resolution Spectroscopy and Analysis of the C[SUB]2[/SUB](0,0) Band in Comet P/Halley
Danks, A. C.; Lambert, D. L.; Sheffer, Y. et al

in Bulletin of the American Astronomical Society (1987, September 01)

Not Available

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See detailHigh resolution spectroscopy with the ESO Coude Echelle spectrometer
Magain, Pierre ULg

in Observational astrophysics with high precision data; Proceedings of the Twenty-seventh Liege International Astrophysical Colloquium (1987)

Various applications of high resolution spectroscopy with the ESO Coude Echelle Spectrometer (CES) are discussed. The aim of this paper is not to present a complete survey of the CES capabilities, but to ... [more ▼]

Various applications of high resolution spectroscopy with the ESO Coude Echelle Spectrometer (CES) are discussed. The aim of this paper is not to present a complete survey of the CES capabilities, but to illustrate some possible applications, with emphasis on rather unusual aspects. In all the observations presented here, the CES has been used with the new short camera and a CCD detector (high resolution RCA SID 503, 640 x 1024 pixels, 15x15 microns each). Compared to the long camera and Reticon detector, this new combination represents an increase of efficiency of 2 to 3 magnitudes with only a moderate loss of resolving power. [less ▲]

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See detailHigh Resolution X-ray Spectroscopy of Early-Type Stars
Rauw, Grégor ULg; Pollock, A. M. T.; Nazé, Yaël ULg

in High Resolution X-ray Spectroscopy: towards XEUS and Con-X (2006, August 01)

Although X-ray emission from massive, early-type stars has been known for almost thirty years, it is only with the advent of the high-resolution spectrographs aboard Chandra and XMM-Newton that a detailed ... [more ▼]

Although X-ray emission from massive, early-type stars has been known for almost thirty years, it is only with the advent of the high-resolution spectrographs aboard Chandra and XMM-Newton that a detailed investigation of the X-ray spectra of these stars has become possible. The existing observations of both single and binary early-type stars have been used to study the properties of their stellar winds. While some results agree with the expectations from theoretical models, other spectra show unexpected features. In this contribution, we review our current knowledge on the X-ray emission of stars of spectral type O and Wolf-Rayet and discuss the possibilities to test some new ideas with future high-resolution X-ray observations. [less ▲]

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See detailHigh resolution X-ray spectroscopy of zeta Puppis with the XMM-Newton reflection grating spectrometer
Kahn, S. M.; Leutenegger, M. A.; Cottam, J. et al

in Astronomy and Astrophysics (2001), 365

We present the first high resolution X-ray spectrum of the bright O4Ief supergiant star zeta Puppis, obtained with the Reflection Grating Spectrometer on-board XMM-Newton. The spectrum exhibits bright ... [more ▼]

We present the first high resolution X-ray spectrum of the bright O4Ief supergiant star zeta Puppis, obtained with the Reflection Grating Spectrometer on-board XMM-Newton. The spectrum exhibits bright emission lines of hydrogen-like and helium-like ions of nitrogen, oxygen, neon, magnesium, and silicon, as well as neon-like ions of iron. The lines are all significantly resolved, with characteristic velocity widths of order 1000-1500 km s[SUP]-1[/SUP]. The nitrogen lines are especially strong, and indicate that the shocked gas in the wind is mixed with CNO-burned material, as has been previously inferred for the atmosphere of this star from ultraviolet spectra. We find that the forbidden to intercombination line ratios within the helium-like triplets are anomalously low for N VI, O VII, and Ne IX. While this is sometimes indicative of high electron density, we show that in this case, it is instead caused by the intense ultraviolet radiation field of the star. We use this interpretation to derive constraints on the location of the X-ray emitting shocks within the wind that are consistent with current theoretical models for this system. [less ▲]

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See detailHigh Rise Navigation Locks - Feasibility Study of 80 m and 113 m Rise Locks
Rigo, Philippe ULg; Marchal, Jean ULg; Rodriguez, S.

in VII Congreso Nacional de Hidraulica (1997, November)

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See detailHigh rotational excitation of NO infrared thermospheric airglow: A signature of superthermal nitrogen atoms?
Hubert, Benoît ULg; Gérard, Jean-Claude ULg; Shematovich, Valeri I et al

in Geophysical Research Letters (1996), 23

The reaction between superthermal N([SUP]4[/SUP]S) atoms produced by exothermic processes and O[SUB]2[/SUB] has been proposed to explain observations of highly rotationally excited nitric oxide in the ... [more ▼]

The reaction between superthermal N([SUP]4[/SUP]S) atoms produced by exothermic processes and O[SUB]2[/SUB] has been proposed to explain observations of highly rotationally excited nitric oxide in the sunlit thermosphere. We examine the importance of this mechanism using a detailed calculation of the fast N([SUP]4[/SUP]S) atoms energy distribution. It is shown that the hot thermal N atoms are able to produce rotationally excited NO in the upper thermosphere through the reaction of O[SUB]2[/SUB] with N([SUP]4[/SUP]S). By contrast, near the NO peak at 110 km, the Maxwellian nitrogen atoms produce substantially less rovibrationally excited NO than the superthermal component. Consequently, the non Maxwellian N([SUP]4[/SUP]S) atoms show a clear spectral signature in the (1-0) and (2-1) bandheads at this altitude. The calculated rovibrationally excited NO concentration at 140 km is shown to be consistent with the value derived from the analysis of infrared airglow spectra. [less ▲]

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See detailHigh salt-tolerant protease from a potential biocontrol agent bacillus pumilus M3-16
Essghaier, Badiaa; Bajji, Mohammed; Jijakli, Haissam ULg et al

in Annals of Microbiology (2009), 59(3), 553-558

In this paper, we investigate the characterization and evaluation of the antifungal protease activity from a halotolerant strain M3-16 of Bacillus pumilus, earlier isolated from a shallow salt lake in ... [more ▼]

In this paper, we investigate the characterization and evaluation of the antifungal protease activity from a halotolerant strain M3-16 of Bacillus pumilus, earlier isolated from a shallow salt lake in Tunisia. Protease enzyme was highly induced by the pathogen tested in vitro (27.4 U/ml). This is the first report on high salt-tolerant protease from B. pumilus, since it was active at high salinity (from 5 to 30% NaCl, w/v) as well as in the absence of salinity. This enzyme showed optimal activity at 60 °C and pH 8. At 80 °C and 30 min, the enzyme retained up to 91% and it showed stability over a wide pH range (from pH 5 to 11). The enzyme was found to be monomer with an estimated molecular mass of 31 kDa. The amino acid sequence showed high similarity (94%) to ATP-dependent protease from B. pumilus strain ATCC 7061. Thus, our alkaline thermostable and high salt-tolerant protease induced by a phytopathogenic fungus, could be useful for application in diverse areas such as biotechnology alimentary and agronomy industries. [less ▲]

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See detailHigh sensitive troponin: pratical guidelines
Chapelle, Jean-Paul ULg

Conference (2011, September 29)

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See detailA High Serum Concentration of Interleukin-6 Is Predictive of Relapse in Quiescent Crohn's Disease
Louis, Edouard ULg; Belaiche, Jacques ULg; Van Kemseke, Catherine ULg et al

in European Journal of Gastroenterology & Hepatology (1997), 9(10), 939-44

BACKGROUND/AIMS: Relapses of Crohn's disease are difficult to predict. We assessed the value of serum level of interleukin-6, tumour necrosis factor alpha (TNF-alpha) and soluble TNF receptors as ... [more ▼]

BACKGROUND/AIMS: Relapses of Crohn's disease are difficult to predict. We assessed the value of serum level of interleukin-6, tumour necrosis factor alpha (TNF-alpha) and soluble TNF receptors as predictors of relapse in quiescent Crohn's disease. PATIENTS/METHODS: Thirty-six patients with inactive Crohn's disease, treated or not, were included. Various clinical and biological parameters, including interleukin-6, TNF-alpha and soluble TNF receptors serum levels were measured at inclusion in the study and the patients were followed clinically for 1 year. The relapse was defined as a Crohn's Disease Activity Index (CDAI) greater than 150 with an increase greater than 100 compared to the inclusion value. We analysed the ability of these parameters to predict relapse in parallel to clinical characteristics and other laboratory parameters. RESULTS: Among the 32 variables tested, interleukin-6 serum level had the greatest ability to predict the time-to-relapse, with 17-fold chance of relapse over a 1-year period for patients with an interleukin-6 serum level greater than 20 pg/ml than for patients with a lower level (P < 0.001). A high serum level of the soluble TNF receptors p55 and p75 also had significant predictive value, in contrast to TNF-alpha serum levels. An interleukin-6 serum level greater than 20 pg/ml and either an acid alpha-1-glycoprotein level greater than 1.1 g/l or a soluble interleukin-2 receptor serum level greater than 95 pM/l were risk factors selected by a stepwise multivariate analysis. In both models a good prognosis group was defined by the absence of the two risk factors, a bad prognostic group by the presence of the two risk factors and an intermediate in between. With both models, the good prognosis group included 17 patients who experienced no relapse over the 1-year follow-up, whereas all patients (seven with the first model and six with the second) in the bad prognosis group had a relapse during the follow-up. Looking specifically at two homogeneous subgroups including either naturally/5-aminosalicylic acid (5-ASA) quiescent or corticoid quiescent patients, a very good predictive value for interleukin-6 serum concentration was also found. CONCLUSION: Interleukin-6 serum level alone or in association with other biological parameters such as acid alpha-1-glycoprotein or the soluble interleukin-2 receptor serum level may be useful for predicting the course of the disease in patients with quiescent Crohn's disease. [less ▲]

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See detailHigh serum transforming growth factor-beta 1 concentration in West Highland white terriers : a key to the breed predisposition in canine idiopathic pulmonary fibrosis
Krafft, Emilie ULg; Heikkilä, H.P.; Jespers, P et al

in Proceedings of the 21st ECVIM-CA Congress (2011, September)

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See detailHigh Speed Astronomical Photometry -- Brian Warner
Manfroid, Jean ULg

in Ciel et Terre (1989), 105

Not Available

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See detailHigh strength steel in seismic resistant building frames - HSS-SERF - Final report
Dubina, Dan; Vulcu, Cristian; Stratan, Aurel et al

Report (in press)

The aim of “HSS-SERF” project was to investigate and evaluate the seismic performance of dual-steel building frames, realized from two different steel grades: Mild Carbon Steel (MCS) and High Strength ... [more ▼]

The aim of “HSS-SERF” project was to investigate and evaluate the seismic performance of dual-steel building frames, realized from two different steel grades: Mild Carbon Steel (MCS) and High Strength Steel (HSS). A comprehensive set of dual-steel frames (moment resisting, concentrically and eccentrically braced) were designed, which allowed the identification of realistic member sizes for both MCS and HSS components. Several practical solutions for bolted and welded beam-to-column joints were identified and designed. Further, an extensive numerical program was carried out for the seismic performance evaluation of frames. The ductility and over-strength demands, and q-factors associated with different performance levels were evaluated. Furthermore, experimental and numerical investigations were carried out on joint assemblies and components. Guidelines were elaborated for the conceptual design and PBD of dual-steel frames under seismic actions, and the technical and economic efficiency of dualsteel structures vs. conventional ones were finally evaluated. The main outcomes of the project consist in: (i) development and characterisation in terms of global ductility and over-strength demands of dual-steel frames with composite columns (innovative solutions in European context); (ii) development of design recommendations; (iii) proposal of innovative solutions for beam-to-column joints with composite columns; (iv) recommendation for weld details and appropriate component method design approaches; (v) evaluation of technical and economic efficiency of the dual-steel approach. [less ▲]

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See detailHigh temperature catalysts through sol-gel synthesis
Lecloux, A. J.; Pirard, Jean-Paul ULg

in Journal of Non-Crystalline Solids (1998), 225

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See detailHigh temperature crossover in paraconductivity of granular Y1Ba2Cu3O7-y
Ausloos, Marcel ULg; Gillet, François ULg; Laurent, Christian et al

in Zeitschrift für Physik. B, Condensed Matter (1991), 84(1), 13-16

We have examined the deviation from linearity of the temperature dependence of the electrical resistivity of a YBaCuO ceramics. We have observed at high temperature a crossover behavior toward a ... [more ▼]

We have examined the deviation from linearity of the temperature dependence of the electrical resistivity of a YBaCuO ceramics. We have observed at high temperature a crossover behavior toward a logarithmic temperature dependence at lower temperature. It seems relevant to attribute the origin of such a term to a pair breaking mechanism contribution, thus to give a lower bound to the existence of superconductivity fluctuations onset temperature. Our findings also implies that carriers are bosons above T(c). [less ▲]

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See detailHigh temperatures limit plant growth but hasten flowering in root chicory (Cichorium intybus) independently of vernalisation.
Mathieu, Anne-Sophie; Lutts, Stanley; Vandoorne, Bertrand et al

in Journal of Plant Physiology (2013), in press

An increase in mean and extreme summer temperatures is expected as a consequence of climate changes and this might have an impact on plant development in numerous species. Root chicory (Cichorium intybus ... [more ▼]

An increase in mean and extreme summer temperatures is expected as a consequence of climate changes and this might have an impact on plant development in numerous species. Root chicory (Cichorium intybus L.) is a major crop in northern Europe, and it is cultivated as a source of inulin. This polysaccharide is stored in the tap root during the first growing season when the plant grows as a leafy rosette, whereas bolting and flowering occur in the second year after winter vernalisation. The impact of heat stress on plant phenology, water status, photosynthesis-related parameters, and inulin content was studied in the field and under controlled phytotron conditions. In the field, plants of the Crescendo cultivar were cultivated under a closed plastic-panelled greenhouse to investigate heat-stress conditions, while the control plants were shielded with a similar, but open, structure. In the phytotrons, the Crescendo and Fredonia cultivars were exposed to high temperatures (35 °C day/ 28 °C night) and compared to control conditions (17 °C) over 10 weeks. In the field, heat reduced the root weight, the inulin content of the root and its degree of polymerisation in non-bolting plants. Flowering was observed in 12% of the heat stressed plants during the first growing season in the field. In the phytotron, the heat stress increased the total number of leaves per plant, but reduced the mean leaf area. Photosynthesis efficiency was increased in these plants, whereas osmotic potential was decreased. High temperature was also found to induce flowering of up to 50% of these plants, especially for the Fredonia cultivar. In conclusion, high temperatures induced a reduction in the growth of root chicory, although photosynthesis is not affected. Flowering was also induced, which indicates that high temperatures can partly substitute for the vernalisation requirement for the flowering of root chicory [less ▲]

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