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See detailHydrophobic Substitutions In The First Residue Of The Crac Segment Of The Gp41 Protein Of Hiv
Vishwanathan, Sa.; Thomas, Annick ULg; Brasseur, Robert ULg et al

in Biochemistry (2008), 47(1), 124-30

We investigated the peptides N-acetyl-AWYIK-amide and N-acetyl-VWYIK-amide corresponding to single amino acid substitutions in LWYIK, a segment found in the gp41 protein of HIV and believed to play a role ... [more ▼]

We investigated the peptides N-acetyl-AWYIK-amide and N-acetyl-VWYIK-amide corresponding to single amino acid substitutions in LWYIK, a segment found in the gp41 protein of HIV and believed to play a role in sequestering this protein to a cholesterol-rich domain in the membrane. The effects of these peptides on the thermotropic phase transitions of 1-stearoyl-2-oleoylphosphatidylcholine (SOPC) and mixtures of SOPC and cholesterol were intermediate between that having the wild-type sequence (LWYIK) and another (IWYIK), the least active peptide previously studied. This correlated with results from studies of single mutations in the gp41 protein of HIV-1, in which L679 of the LWYIK segment is replaced with either A or V, measuring the capability of TZM-BL HeLa-based HIV-1 indicator cells to form syncytia. The peptides were also comparatively analyzed in silico. All together, the results suggest that the mode of interaction of this region of gp41 with the polar heads of membrane lipids contributes to its cholesterol selectivity and that this is somehow related to the biological activity of the viral glycoprotein. [less ▲]

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See detailHydrophobic substrate utilization by the yeast Yarrowia lipolytica, and its potential applications
Fickers, Patrick ULg; Benetti, Ph; Waché, Y et al

in FEMS Yeast Research (2005), (5), 527-543

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See detailHydropower: An Essential Partner of Renewable Energy Source
Lejeune, André ULg; Hui, Samuel; Pirotton, Michel ULg et al

in Sayigh, Ali (Ed.) World Renewable Energy Congress XI (2010, September 25)

In 2006, the 17 percent of the world’s electricity that was generated from hydropower represented nearly 90 percent of renewable electricity generation worldwide; Hydropower is an important source of ... [more ▼]

In 2006, the 17 percent of the world’s electricity that was generated from hydropower represented nearly 90 percent of renewable electricity generation worldwide; Hydropower is an important source of renewable energy and produces extremely small quantities of carbon dioxide. Between 1998 and 2008, renewable electricity production in the world rose from 2,794.9 to 3,762.6 TWh, i.e. an additional 967.6 TWh. As a final conclusion, despite hydropower’s high initial costs, its long-term overall costs tend to be low. The average cost of electricity production by hydropower is still very attractive for the moment. In the next future, hydropower will keep his position, in front of the other renewable sources of electricity, on the same level with biomass, better that wind power and much cheaper than solar energy. [less ▲]

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See detailHydrostatic flattening, core structure, and translational mode of the inner core
Denis, Carlo; Rogister, Yves; Amalvict, Martine et al

in Physics of the Earth & Planetary Interiors (1997), 99(3-4), 195-206

Modern Earth models are constrained by an inertia coefficient y*=J(2)/H approximate to 0.3308 which leads to a so-called 'hydrostatic' flattening f(hyd) approximate to 1/299.9. The latter is in rather ... [more ▼]

Modern Earth models are constrained by an inertia coefficient y*=J(2)/H approximate to 0.3308 which leads to a so-called 'hydrostatic' flattening f(hyd) approximate to 1/299.9. The latter is in rather large disagreement with the observed flattening f approximate to 1/298.3. We show that a more satisfactory value of the inertia coefficient for constraining a standard Earth model is y approximate to 0.332, consistent with a hydrostatic flattening of about 1/298.6. The change of the value of the inertia coefficient from about 0.331 to about 0.332 significantly alters the density structure of the core, notably the density jump at the inner core boundary. It brings, as a by-produce, the hydrostatic values of J(2) and H to better agreement with the observed values than is presently thought, and most probably leads for the Slichter mode to a period of much longer than 5.42 h, which is the value computed for PREM. [less ▲]

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See detailHydrothermal synthesis and crystal structure of Na(Na,Mn)(7)Mn-22(PO4)(18)0.5H(2)O, a new compound of fillowite structure type
Keller, Paul; Hatert, Frédéric ULg; Lissner, Falk et al

in European Journal of Mineralogy (2006), 18(6), 765-774

The chemical compound Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O was synthesized with a Tuttle pressure vessel at 800 degrees C and 1 kbar during experimental investigations on the conditions of ... [more ▼]

The chemical compound Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O was synthesized with a Tuttle pressure vessel at 800 degrees C and 1 kbar during experimental investigations on the conditions of fillowite formation. The crystal structure of a single-crystal, space group R (No. 148), a = 15.2741(9), c = 43.334(3) angstrom, Z = 6, was determined from X-ray intensity data and refined up to R-1 = 0.0728 and R-l{FO > 4 sigma(FO)} = 0.0546. The crystal structure of Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O is similar to the structure of fillowite, Na6Ca3(Mn,Fe)(21)(PO4)(18.), but a significant difference between the synthetic H2O containing compound and fillowite is the replacement of (Na12)O-8(-) by Mn(H2O)(2)O-5(-) polyhedra, which form characteristic six-member rings. The coordination polyhedra around Na12 and Mn12 are so different that simple isomorphous substitution of Na12 by Mn12 is very unlikely, but whole six-member rings either of (Na12)O-8(-) or (Mn12)(H2O)(2)O-5 polyhedra seem to be distributed statistically over the crystal structure. No indication for ordering, e.g. sheet by sheet, has been observed. Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O is the first fillowite-like compound for which water is located in the structure from single-crystal study. This result is proved by infrared spectral data and indicates that water can play an essential role in the fillowite structure-type. Structural features of the synthetic compounds Na(Na,Mn)(7)Mn-22(PO4)(18)center dot 0.5H(2)O, Na4Ca4Mg21(PO4)(18) and fillowite are compared. [less ▲]

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See detailHydrothermal Synthesis and Structure of Fe6.36Mn0.64(PO3(OH))4(PO4)2
Belfguira, Nadia; Walha, S.; Ben Salah, A. et al

in Journal of Chemical Crystallography (2010), 40

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See detailHydrothermal Synthesis and Structure of the Solid Solution (Fe0.54Mn0.46)(PO4)•2H2O
Belfguira, Nadia; Walha, S.; Kabadou, A. et al

in Journal of Chemical Crystallography (2011), 41

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See detailHydrothermal Synthesis of Alluaudite in the Na-Mn-Fe2+-Fe3+-P-O System
Hatert, Frédéric ULg

in Journal of Conference Abstracts (2002), 7(1), 44

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See detailHydrothermal synthesis, crystal chemistry, and stability of fillowite-type phosphates in the Na-Mn-Fe2+-Mg-PO4 system
Rondeux, Mélanie ULg; Hatert, Frédéric ULg

in Acta Mineralogica-Petrographica, Abstract series (2010), 6

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See detailHydrotreatment of petroleum atmospheric residua using oceanic polymetallic nodules in trickle bed reactor
Dodet, Claude ULg; Noville, Francis ULg; Crine, Michel ULg et al

in Bulletin des Sociétés Chimiques Belges (1985), 94

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See detailHydroxyacids
PIERARD-FRANCHIMONT, Claudine ULg; QUATRESOOZ, Pascale ULg; PIERARD, Gérald ULg

in Cosmeceuticals-drugs vs cosmetics (2011)

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See detailHydroxychloroquine (Plaquenil) for recurrence prevention of Crohn's disease after curative surgery.
Louis, Edouard ULg; Belaiche, Jacques ULg

in Gastroentérologie Clinique et Biologique (1995), 19(2), 233-4

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See detailHydroxyl detection on Venus and Earth and implications for ozone
Migliorini; Piccioni, G.; Cardesin-Molino, A. et al

Poster (2009)

We present a comparison between hydroxyl night side infrared emissions on Earth and Venus. The vertical brightness distributions of the OH emissions are shown for the two planets and excitation processes ... [more ▼]

We present a comparison between hydroxyl night side infrared emissions on Earth and Venus. The vertical brightness distributions of the OH emissions are shown for the two planets and excitation processes are discussed. [less ▲]

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See detailHydroxyl nightglow on Venus observed by VIRTIS on Venus-Express
Migliorini, A.; Piccioni, G.; Gérard, Jean-Claude ULg et al

Conference (2009, April)

Hydroxyl has been recently observed for the first time in the Venus atmosphere with the VIRTIS spectrometer on board the Venus-Express spacecraft. The (1-0) around 2.81 microns and the (2-0) around 1.46 ... [more ▼]

Hydroxyl has been recently observed for the first time in the Venus atmosphere with the VIRTIS spectrometer on board the Venus-Express spacecraft. The (1-0) around 2.81 microns and the (2-0) around 1.46 microns transitions have been detected. The intensity of the two emissions are respectively about 55 and 480 times less intense than the (0-0) oxygen transition (Piccioni et al, A&A, 2008). The possible chemical reactions which can produce hydroxyl on Venus involve O3 and HO2, with the former being the most probable, and hence OH can be used to indirectly infer the ozone distribution on Venus. VIRTIS data in limb mode observation were analyzed to derive the mean distribution of hydroxyl in the night side of Venus and the results are presented here. The typical peak altitude of the two emissions is set at 95-96 km in limb view, a few km lower than the oxygen emission at 1.27 um due to the transition (0-0). The peak altitude of the latter typically occurs at 97-98 km height. The OH full width at half maximum is in average about 7 km, and sometimes higher. The mean map of (1-0) hydroxyl distribution around 2.81 microns shows a maximum of emission of about 130 kR at about 1h local time. The study of the (2-0) hydroxyl distribution at around 1.46 microns results more difficult due to its weak intensity. [less ▲]

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See detailHydroxyl radical generation by new furocoumarin derivatives: a spin trapping and ESR study
Collet, M.; Hoebeke, Maryse ULg; Piette, J. et al

Conference (1993)

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See detailHydroxymethylfurfural: a possible emergent cause of honey bee mortality?
Zirbes, Lara ULg; Nguyen, Bach Kim ULg; de Graaf, DC et al

in Journal of Agricultural and Food Chemistry (in press)

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See detailHydroxyuree et infection par le VIH
Nkoghe, D.; Kola, L.; Leonard, Philippe ULg et al

in Revue Médicale de Liège (2000), 55(7), 721-4

Hydroxyurea is an anticancerous product, used recently in the treatment of HIV-1 infection thanks to its inhibitory action in viral replication, potentialization of the nucleosides activity (particularly ... [more ▼]

Hydroxyurea is an anticancerous product, used recently in the treatment of HIV-1 infection thanks to its inhibitory action in viral replication, potentialization of the nucleosides activity (particularly ddI or didanosine) and its cytostatic properties on CD4 and CD8 lymphocytes. Many studies showed its efficiency, as further drug, in initial regimen of a tritherapy (containing ddI) and salvage therapy. The dosage of 500 mg bid seems tolerated well by adults, and 20 mg/kg by children. Long-term tolerance remains unknown. With ddI, it could be proposed in developing countries. [less ▲]

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