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See detailComparative study of the condensation of chicken erythrocyte and calf thymus chromatins by di- and multivalent cations.
Marquet, R.; Colson, Pierre ULg; Matton, Anne-Marie ULg et al

in Journal of Biomolecular Structure & Dynamics (1988), 5(4), 839-57

The condensation of chicken erythrocyte (CE) and calf thymus (CT) chromatins upon addition of di- and multivalent cations has been studied using turbidity, precipitation and electric dichroism ... [more ▼]

The condensation of chicken erythrocyte (CE) and calf thymus (CT) chromatins upon addition of di- and multivalent cations has been studied using turbidity, precipitation and electric dichroism measurements. For all the cations investigated (Mg2+, Tb3+, Co(NH3)6(3+), spermidine Spd2+ and spermine Sp4+) condensation of CE chromatin occurred before the onset of aggregation, while aggregation of CT chromatin started before condensation with all cations except Mg2+ and Tb3+. Precipitation of CE chromatin required lower di- and multivalent cations concentrations than CT chromatin. The electric dichroism data for both chromatins, at low ionic strength in the absence of di- or multivalent cations, indicated that the nucleoprotein molecules were not totally decondensed but that a "precondensed" state was already present. A positive electric dichroism was observed for the most condensed chromatin fibers, in agreement with the "cross-linker" models. Tb3+ led to less compact condensed particles as judged from the electric dichroism observations, but electron microscopy revealed that "30 nm fibers" were formed. Very little aggregation was produced by Tb3+. On the contrary, spermine produced very large networks of condensed molecules, but large spheroidal particles were also observed. The condensation of CE chromatin happened without changes of solution conductivity upon cation salt addition, regardless of the condensing cation, indicating a cooperative uptake of the ions during this process. [less ▲]

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See detailComparative study of the effect of drying temperatures and heat-moisture treatment on the physicochemical and functional properties of corn starch
Malumba Kamba, Paul ULg; Janas, Sébastien ULg; Roiseux, Olivier et al

in Carbohydrate Polymers (2010), 79(3), 633-641

This manuscript compares the modifications induced by the heat-moisture treatment of native starch (HMT) and by the hot-air drying of corn on wet-milled starch granules. High temperatures applied during ... [more ▼]

This manuscript compares the modifications induced by the heat-moisture treatment of native starch (HMT) and by the hot-air drying of corn on wet-milled starch granules. High temperatures applied during both corn drying and HMT reduced the swelling capacity of granules, increased the starch gelatinization temperatures and decreased their residual enthalpy. Pasting behaviour of pre-treated starch showed a decrease of peak and breakdown viscosity when corn drying and HMT temperatures increased. Microscopic analysis showed that after hydrothermal treatment, starch granules extracted from corn dried at lower temperature swell more significantly than those extracted from corn dried at higher temperature. All these changes suggest the occurring of structural modifications within starch granules during high-temperature pre-treatments. At similar temperatures and initial moisture contents, HMT affected the physicochemical and functional properties of cornstarch more dramatically than hot-air drying. Differences induced by these two treatments were attributed to the availability of water around granules during these two pre-treatment procedures. [less ▲]

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See detailComparative study of the effects of ethidium bromide and DNA-ethidium bromide complex on normal and cancer cells.
Heinen, Ernst ULg; Bassleer, R.; Calberg-Bacq, C. M. et al

in Biochemical Pharmacology (1974), 23(10), 1549-51

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See detailComparative study of the efficacy of fusidic acid and povidone iodine in childhood impetigo.
Szepetiuk, Gregory; Henry, Frédérique ULg; Pierard, Gérald ULg

in Journal of Pediatric Infectious Diseases (2006), 1

Impetigo is a superficial bacterial infection of the skin. It is a contagious condition particularly affecting children. In many instances, a topical antibacterial treatment is recommended to clear the ... [more ▼]

Impetigo is a superficial bacterial infection of the skin. It is a contagious condition particularly affecting children. In many instances, a topical antibacterial treatment is recommended to clear the disease. Topical antibiotics and antiseptics can be used, but the risk for antibiotic-induced bacterial resistance of the community-acquired type has been pointed out. The present study was undertaken as a randomized intraindividual comparative trial between fusidic acid (FA) cream and povidone iodine (PVP-I) gel in 40 children suffering from impetigo. Cultures revealed Staphylococcus aureus in the vast majority of the cases. The lesions present on each upper limb were treated twice daily with one or the other test formulation. Clinical assessments were performed twice weekly until cure. After one week, cure was obtained in 57.5% of the PVP-I-treated limbs compared to 32.5% of the FA-treated limbs. At the end of treatment cure was obtained first on the PVP-I treated sites in 67.5% of cases compared to 15% on the FA-treated sites. Clinical cure occurred simultaneously on both test sites in 17.5% of cases. In conclusion, PVP-I provided faster clinical cure than FA. Considering the treatment cost, the raising community-acquired staphylococci resistance to FA, and the results of the present study, PVP-I gel appears superior to FA cream in childhood impetigo. [less ▲]

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See detailA comparative study of the grammaticalized uses of English sort of and French genre de in teenage forum data
Davidse, Kristin; Brems, Lieselotte ULg; Willemse, Peter et al

in Miola, Emanuele (Ed.) Proceedings of the workshop languages go web (2013)

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See detailA comparative study of the hydrophyte flora from the Alpine Rhine to the Middle Rhine. Application to the conservation of the Upper Rhine aquatic ecosystems
Vanderpoorten, Alain ULg; Klein, J. P.

in Biological Conservation (1999), 87(2), 163-172

A typology of the main channel of the river Rhine according to its aquatic bryophyte and vascular hydrophyte assemblages is presented. The aquatic bryophytes are especially abundant in the main channel ... [more ▼]

A typology of the main channel of the river Rhine according to its aquatic bryophyte and vascular hydrophyte assemblages is presented. The aquatic bryophytes are especially abundant in the main channel, having found stable, rocky habitats with variable water levels in the regulated river, and segregate longitudinally along a gradient of water quality. Conversely, the vascular hydrophytes are restricted to side channels with constant discharges and silt deposits, and segregate laterally along a gradient of connectivity with the main river. The hydrophytes have been affected by water eutrophication which became obvious in the 1960s-1970s. The oligotrophic groundwater-fed side-channels disconnected since the river canalization consequently include a relic reference flora. Important hydraulic works are currently in progress in order to protect the areas located downstream from the canalized Rhine from flooding by retaining the river waters in lateral systems during the discharge peaks and to recreate a functional alluvial floodplain by reconnecting the disconnected side-channels to the main river. The floodpulse caused by the suddent input of surface water in the disconnected brooks will probably wash out most of the hydrophytes and it is very likely that the rare species with their low recolonization strategies will disappear in these conditions. It is highly desirable to preserve from flooding the last oligotrophic brooks with their original hydrophyte assemblages. Those brooks which show a tendency to silt up can be re-dynamized by ecological engineering without disturbing the flowing drains of the watertable. In areas (including flowing drains of the watertable) that have already been designated for flood retention, the hydraulic works should allow, as far as possible, the preservation of the flowing oligotrophy streams by only permitting the input of surface water in the silted-up brooks. The disconnected side-channels could then continue their role as refugia from where the main channel, whose water quality has been improving for a decade, could be recolonized by its primary flora. [less ▲]

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See detailComparative study of the in vitro and in vivo properties of two bovine herpesvirus-5 reference strains
Ladelfa, M. F.; De Medico Zajac, M. P.; Kotsias, F. et al

in Acta Veterinaria Scandinavica (2011), 53

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See detailComparative study of the incidence and risk factors of retained placenta in dairy and beef cows in Wallonia
Hanzen, Christian ULg; Vallée, Claire; Simon, Annik ULg et al

Conference (2011, September 09)

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See detailComparative study of the life cycle profile of residential masonry and steel framed buildings in Belgium
Massetto de Aquino, Ligia; Reiter, Sigrid ULg; Rossi, Barbara ULg

in Final International Conference of COST Action C25 - Sustainability of Constructions : Towards a better built environment: Innsbruck 3-5 February 2011 (2011, February)

This study presents the life cycle assessment (LCA) of two buildings similar in dimensions, orientations, climate and purpose but designed for Belgium using two different construction systems: traditional ... [more ▼]

This study presents the life cycle assessment (LCA) of two buildings similar in dimensions, orientations, climate and purpose but designed for Belgium using two different construction systems: traditional masonry made of concrete blocks, insulation and ceramic bricks and light gauge steel framing as the load carrying component. The comparison between the LCA focuses on the CO2 emission equivalent for each building’s life cycle. After a short sensitivity analysis, the results of the assessment are compared against each other and the conclusions are presented. [less ▲]

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See detailComparative Study of The Milk Fat Globule Membrane and Mouse Mammary Tumour Virus Prepared From The Milk Of An Infected Strain Of Swiss Albino Mice
Calbberg-Bacq, C. M.; François, C.; Gosselin, L. et al

in Biochimica et Biophysica Acta (1976), 419

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See detailComparative study of the oxyhaemoglobin dissociation curve of four mammals: man, dog, horse and cattle
Clerbaux, Th; Gustin, Pascal ULg; Detry, B et al

in Comparative Biochemistry and Physiology. A : Comparative Physiology (1993), 106A(4), 687-694

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See detailComparative study of the red and violet systems of cyanogen bands.
King, Arthur S.; Swings, Polydore ULg

in Astrophysical Journal (1945), 101

Comparison of bands belonging to the violet and red systems of CN showed that in emission the (1, 0) band λ 7873 (red system) is stronger than the (0, 0) band λ 3883 (violet system) at temperatures of the ... [more ▼]

Comparison of bands belonging to the violet and red systems of CN showed that in emission the (1, 0) band λ 7873 (red system) is stronger than the (0, 0) band λ 3883 (violet system) at temperatures of the electric furnace below 2300° C. Approximate equality of the main structure of the two bands is attained at 2300° C; λ 3883 becomes somewhat stronger than λ 7873 at 2600° C. At the high temperature, approximately 7300° C, of the carbon arc in air, the λ 3883 band is about two hundred times stronger than the λ 7873 band. Self-reversal appears easily in the violet band, but not in the red. The two systems react differently to a change in pressure, the red system increasing in intensity more rapidly than the violet when the pressure increases. In absorption, the (0, 0) and (1, 0) bands of the red system are much weaker than the violet bands at any temperature of the furnace. A list of the stronger absorption lines of the λ 7873 band is given. The relative intensities of the two systems in emission in the electric furnace at different temperatures and in the arc are explained by the Boltzmann populations of the upper levels in thermodynamic equilibrium. These populations differ strongly because the upper electronic level, A2Π, of the red system is much lower (e.p., 1.35 v.) than the upper level, B2∑, of the violet system (3.2 v.). From the equal intensity of the strongest lines of the two systems in emission at T = 2300° C, an approximate value of 1400 is found for the ratio of the emission transition probabilities of the strongest violet lines to those of the strongest red lines. The corresponding estimated value of the ratio of the absorption transition probabilities is 87.5, explaining the weakness of the red system in absorption in the laboratory. These considerations show that the red bands of CN should not be expected in fluorescence in comets and that previous identifications must be revised accordingly. No line of the red system of CN will be found in interstellar absorption. The intensity of the red bands in absorption in certain carbon stars in which the violet bands are weak indicates that the atmospheres of these stars have much less continuous absorption in the red than in the violet. [less ▲]

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See detailComparative study of the red and violet systems of cyanogen bands.
King, Arthur-S.; Swings, Polydore ULg

in Contributions from the Mount Wilson Observatory (1945), 700

Comparison of bands belonging to the violet and red systems of CN showed that in emission the (1, 0) band λ 7873 (red system) is stronger than the (0, 0) band λ 3883 (violet system) at temperatures of the ... [more ▼]

Comparison of bands belonging to the violet and red systems of CN showed that in emission the (1, 0) band λ 7873 (red system) is stronger than the (0, 0) band λ 3883 (violet system) at temperatures of the electric furnace below 2300° C. Approximate equality of the main structure of the two bands is attained at 2300° C; λ 3883 becomes somewhat stronger than λ 7873 at 2600° C. At the high temperature, approximately 7300° C, of the carbon arc in air, the λ 3883 band is about two hundred times stronger than the λ 7873 band. Self-reversal appears easily in the violet band, but not in the red. The two systems react differently to a change in pressure, the red system increasing in intensity more rapidly than the violet when the pressure increases. In absorption, the (0, 0) and (1, 0) bands of the red system are much weaker than the violet bands at any temperature of the furnace. A list of the stronger absorption lines of the λ 7873 band is given. The relative intensities of the two systems in emission in the electric furnace at different temperatures and in the arc are explained by the Boltzmann populations of the upper levels in thermodynamic equilibrium. These populations differ strongly because the upper electronic level, A2Π, of the red system is much lower (e.p., 1.35 v.) than the upper level, B2∑, of the violet system (3.2 v.). From the equal intensity of the strongest lines of the two systems in emission at T = 2300° C, an approximate value of 1400 is found for the ratio of the emission transition probabilities of the strongest violet lines to those of the strongest red lines. The corresponding estimated value of the ratio of the absorption transition probabilities is 87.5, explaining the weakness of the red system in absorption in the laboratory. These considerations show that the red bands of CN should not be expected in fluorescence in comets and that previous identifications must be revised accordingly. No line of the red system of CN will be found in interstellar absorption. The intensity of the red bands in absorption in certain carbon stars in which the violet bands are weak indicates that the atmospheres of these stars have much less continuous absorption in the red than in the violet. [less ▲]

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See detailComparative study of the reproductive characteristics of XY male and hormonally sex-reversed XX male Eurasian perch, Perca fluviatilis
Rougeot, Carole ULg; Nicayenzi, F.; Mandiki, S. N. et al

in theriogenology (2004), 62(5), 790-800

In order to compare the reproductive capacity of XY male versus XX male (neomales) Eurasian perch (Perca fluviatilis), we determined the sperm quality (sperm concentration and motility) and reproductive ... [more ▼]

In order to compare the reproductive capacity of XY male versus XX male (neomales) Eurasian perch (Perca fluviatilis), we determined the sperm quality (sperm concentration and motility) and reproductive characteristics such as gonadosomatic index (GSI), fertilization rate and sex steroid levels (testosterone, T; 17 beta-estradiol, E2 and 11-ketotestosterone, 11KT) during the reproductive season. Median GSI was not significantly different between XY males (7.9%) and XX males (7.5%). Fertilization rates ranged between 30.0 and 98.0%. Sperm concentration ranged between 27.9 x 10(9) and 42.0 x 10(9) spermatozoa ml(-1). Median level of T, 11KT and E2 levels increased in the middle of the reproductive season (2136.0, 2409.0 and 3252.0 pg ml(-1), respectively) and decreased at the end (1657.0, 2006.6 and 431.0 pg ml(-1) respectively). Sperm motility was assessed by CASA and expressed by the curvilinear velocity (VCL), straight line velocity (VSL), average path velocity (VAP), linearity (LIN), percentage of motile sperm (% MOT) and motile concentration (MOC). Overall, there were not any significant differences between XY and XX males. In conclusion, no differences of reproductive capacities were observed between XY males and XX males suggesting that the last can be crossed with females to improve the productivity of Eurasian perch by producing all-female stock. (c) 2004 Elsevier Inc. All rights reserved. [less ▲]

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