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See detailComparative titration of ginsenosides by different techniques in commercial ginseng products and callus cultures
Kevers, Claire ULg; Jacques, Philippe; Gaspar, Thomas ULg et al

in Journal of Chromatographic Science (2004), 42(10, Nov-Dec), 554-558

The ginsenoside content of different ginseng species (Panax ginseng, P. quinquefolium, and P. vietnamensis) from different sources (roots from field-grown plants or from in vitro cultures, cells from ... [more ▼]

The ginsenoside content of different ginseng species (Panax ginseng, P. quinquefolium, and P. vietnamensis) from different sources (roots from field-grown plants or from in vitro cultures, cells from solid calluses or from liquid cultures, commercial powders, and suspensions) is evaluated by means of a new high-performance thin-layer chromatography (HPTLC) technique combining an automatic TLC sampler and scanner. The results are compared with those obtained through more classical gross spectrometric and high-performance liquid chromatography (HPLC) techniques. HPTLC and HPLC allow the separation and estimation of the different ginsenosides. For this, HPTLC is faster and simpler than HPLC. Both techniques determine less amounts of ginsenosides than spectrophotometry, which displays overestimated values caused by light absorption by contaminating osides. In vitro cultured cells and roots contain the same ginsenosides as those produced by their mother plants, although at quite lower levels. The culture media also accumulates ginsenosides. [less ▲]

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See detailComparative toxicities of a wild Plant essential oil and blends of its major constituents on mortality and fecundity of spider mites (Acari: Tetranychidae)
Attia, Sabrina; Grissa, Kaouthar Lebdi; Ghrabi, Zeineb et al

in Lochynski, Stanislaw; Wawrzenczyk, Czeslaw (Eds.) 41th International Symposium on Essential Oils (ISEI 2010) (2010, September)

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See detailComparative toxicity of Deverra scoparia essential oil and blends of its major constituents against Tetranychus urticae Koch
Attia, Sabrine; Grissa, Kaouthar Lebdi; Lognay, Georges ULg et al

Poster (2010, October 14)

The phytophagous two-spotted spider mite Tetranychus urticae Koch is a ubiquitous species, present worlwide on a large variety of plant families. Since T. urticae resistance spread rapidly, biological ... [more ▼]

The phytophagous two-spotted spider mite Tetranychus urticae Koch is a ubiquitous species, present worlwide on a large variety of plant families. Since T. urticae resistance spread rapidly, biological control tactics are crucial to manage spider mite populations. In this respect, plant-derived essential oil products are a good alternative as they are, in general, considered as minimum-risk pesticides. In that context, laboratory experiments were conducted to assess the toxicity of essential oil of Deverra scoparia endemic plant to North Africa on females of the two spotted spider mite T. urticae (Koch). Essential oil was distillated from fresh leaves from D. scoparia and was sprayed on groups of adults females. The susceptibility of these females to D. scoparia essential oil was tested. A series of dilutions were used to bracket the dose-response range. Tests proved that female mortality increased with essential oil concentration with DL50 and DL90 values of 1.79 mg/l and 3.16 mg/l, respectively. The analysis of D. scoparia essential oil using GC-MS revealed presence of 10 major constituents: alpha-thujene, alpha-pinene, sabinene, myrcene, 3-carene, ocimene, terpinene-4-ol, pulegone, eugenol and beta-eudesmol. For a comprehensive evaluation of the potential of D. scoparia essential oil as acaricidal, individual blends activity of these constituents were tested against T. urticae female. Toxicity of blends of different components indicated significant differences among the active and inactive components, with the presence of all constituents necessary to have toxicity near to that of whole D. scoparia oil. The results showed that natural oil of D. scoparia and some of its constituents have potential for development as botanical acaricide, at least against T. urticae. [less ▲]

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See detailComparative Trophic Morphology in Eight Species of Damselfishes (Pomacentridae)
Frederich, Bruno ULg; Pilet, A.; Parmentier, Eric ULg et al

in Journal of Morphology (2008), 269(2), 175-88

Damselfishes show significant biodiversity in the coral reefs. To better understand such diversity, an ecomorphological approach was investigated in the trophic morphology of eight species of ... [more ▼]

Damselfishes show significant biodiversity in the coral reefs. To better understand such diversity, an ecomorphological approach was investigated in the trophic morphology of eight species of Pomacentridae (Chromis acares, C. margaritifer, Dascyllus aruanus, D. flavicaudus, Pomacentrus pavo, Plectroglyphidodon johnstonianus, Pl. lacrymatus and Stegastes nigricans) belonging to different trophic guilds (zooplankton, algal, coral polyp feeders and omnivores). Geometric morphometrics were used to quantify size and shape variations in four skeletal units: (1) neurocranium, (2) suspensorium and opercle, (3) mandible and (4) premaxilla. This method allowed us to reveal shape and size differences correlated to functional diversity both within and between trophic guilds. Among zooplanktivores, C. margaritifer, D. aruanus and D. flavicaudus have a high and long supraoccipital crest, short mandibles forming a small mouth and high suspensoria and opercles. These three species can be considered to be suction feeders. In the same guild, C. acares shows opposite characteristics (long and thin mandibles, lengthened neurocranium and suspensorium) and can be considered as a ram feeder. Among herbivores and corallivores, the two species of Plectroglyphidodon and S. nigricans can be considered as grazers. Differences in skeletal shape are mainly related to improving the robustness of some skeletal parts (broad hyomandibular, short and high mandibles). The shapes of P. pavo, which feeds largely on algae, strongly differ from that of the other three grazers exhibiting similar morphological characteristics to C. acares (e.g., long and shallow suspensorium, lengthened neurocranium). This highlights likely differences concerning cutting or scraping method. Finally, no strong correlations exist between size and shapes in the eight studied species. Size difference among species having a very similar shape could be viewed as a factor optimizing resource partitioning. [less ▲]

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See detailComparative ultrasonographic and morphologic appearance of femorotibial menisci in horses: a preliminary study
De Busscher, V.; Busoni, Valeria ULg; Schreder, A. et al

in Canifelis Hippos Proceedings (2007)

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See detailComparative ultrastructural study of the effects of serum-free medium and dibutyryl-cyclic AMP on newborn rat astroblasts.
Moonen, Gustave ULg; Heinen, Ernst ULg; Goessens, Guy ULg

in Cell & Tissue Research (1976), 167(2), 221-7

Modifications of cell shape induced in cultured newborn rat astroblasts by serum deprivation or dibutyryladenosine 3'-5' monophosphate (dBcAMP) are described. Serum suppression modifies the adhesitivity ... [more ▼]

Modifications of cell shape induced in cultured newborn rat astroblasts by serum deprivation or dibutyryladenosine 3'-5' monophosphate (dBcAMP) are described. Serum suppression modifies the adhesitivity of the cells to the substrate, but this modification is not consistent with a true differentiation. The main ultrastructural feature of dBcAMP-treated astroblasts is the presence of an extensive system of 90 A microfilaments, while control cells are relatively devoid of these structures. [less ▲]

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See detailComparative validation of three water cooling coil models
Gendebien, Samuel ULg; Bertagnolio, Stéphane ULg; Lemort, Vincent ULg

in Proceedings of the 10th REHVA World Congress - Clima 2010 (2010, May)

Water cooling coils are widely used in common HVAC systems. Accurate and robust cooling coil simulation models are required to perform reliable calculations of building cooling needs. Many different ... [more ▼]

Water cooling coils are widely used in common HVAC systems. Accurate and robust cooling coil simulation models are required to perform reliable calculations of building cooling needs. Many different cooling coil simulation models were developed during the last decades. The most commonly used cooling coil models are presented and compared in terms of implementation in the first part of the paper. A simplified variable boundary model is presented and comparatively and empirically validated to two reference models. [less ▲]

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See detailA comparative, Randomized trial of Concentration-Controlled Sirolimus Combined With Reduced-Dose Tacrolimus or Standard-Dose Tacrolimus in Renal Allograft Recipients
Bechstein, W.O; Paczeck, L; Wramner, L et al

in Transplantation Proceedings (2013), 45

The clinical safety and efficacy of sirolimus plus reduced-dose tacrolimus was evaluated in de novo renal allograft recipients enrolled in a comparative, open-label study. Methods. One hundred twenty ... [more ▼]

The clinical safety and efficacy of sirolimus plus reduced-dose tacrolimus was evaluated in de novo renal allograft recipients enrolled in a comparative, open-label study. Methods. One hundred twenty-eight renal allograft recipients were randomly assigned (1:1) to receive reduced-dose tacrolimus plus sirolimus (rTAC) or standard-dose tacrolimus and sirolimus (sTAC) for 6 months. The primary efficacy endpoint was calculated creatinine clearance values at 6 months. Results. Demographic variables were similar between groups. At 6 months, mean ( standard deviation) calculated creatinine clearance was significantly improved in the rTAC group (63.8 vs 52.7 mL/min, P ¼ .005), although mean serum creatinine values were not significantly different. Patient survival (95.2% and 96.9%) and graft survival (93.7% and 98.5%) were similar between the rTAC and sTAC groups, respectively. Acute rejection rates were 17.5% with rTAC and 7.7% with sTAC (P ¼ .095). Conclusions. The rTAC regimen provided effective immunosuppression and was associated with improved creatinine clearance. Adequate immunosuppressant exposure must be achieved in the early postoperative period to minimize the risk of acute rejection. [less ▲]

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See detailCOMPARATIVE-STUDY OF DIFFERENT BAMBOO PULPS
TSHIAMALA, T.; FRAIPONT, L.; Paquot, Michel ULg et al

in Holzforschung : International Journal of the Biology, Chemistry, Physics, & Technology of Wood (1984), 38(5), 281-288

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See detailComparator selection for RPC with many labels
Hiard, Samuel ULg; Geurts, Pierre ULg; Wehenkel, Louis ULg

in ECAI 2012 : 20th European Conference on Artificial Intelligence : 27-31 August 2012, Montpellier, France (2012, August)

The Ranking by Pairwise Comparison algorithm (RPC) is a well established label ranking method. However, its complexity is of O(N²) in the number N of labels. We present algorithms for selection, before ... [more ▼]

The Ranking by Pairwise Comparison algorithm (RPC) is a well established label ranking method. However, its complexity is of O(N²) in the number N of labels. We present algorithms for selection, before model construction, a subset of comparators of size O(N), to reduce the computational complexity without loss in accuracy. [less ▲]

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See detailCompared anatomy of the locomotor system : a website
Noble, Prisca ULg; Collin, Bernard ULg; Denoix, Jean-Marie

in Anatomia, Histologia, Embryologia (2010, July 28), 39(4), 275

Introduction: This website is a multi-dimensional approach of the locomotor system in domestic animals. The first objective of this anatomical presentation is to establish relation between systemic ... [more ▼]

Introduction: This website is a multi-dimensional approach of the locomotor system in domestic animals. The first objective of this anatomical presentation is to establish relation between systemic anatomy and topographic anatomy. The second objective is to teach a practical anatomy that must be adapted to the clinician work. Methods: From the dissection of equine, bovine and canine specimens, osteology, arthrology and myology (OAM) were photographed and filmed. All photos and movies were captioned and designed using Fireworks (Adobe CS4, USA), AVS video converter 6 (MediaTechnologies Ltd, UK) and Divx Author (Divx Inc, USA). The website was designed using Dreamweaver (Adobe CS4, USA). Results: Compared anatomy site consists on dichotomously organised web pages. Each page is transversally and vertically connected with others, and always surmounted by a navigation barr. From the navigation barr we can travel through different drop-down menus (DDM). The first DDM corresponds to the lesson menu (it sends to general OAM) ; the second and third DDMs correspond to the equine picture menu and the bovine/canine picture menu (from them we can navigate in OAM per species and per system using clickable captioned photos and movies, the functional aspects being explained). For practical reasons, equine species is used as animal reference. Indeed only anatomical differences of the other species are detailed and compared. Finally the button Index corresponds to the surgeon view (all of the body is transversally cut, the clickable anatomical structures are sent back to their specific topic web page). Conclusions: Because of the numerous photos and movies, the three-dimensional view is better understood. Because of the transversal and vertical links, the navigation, in whatever level per species or per system or per anatomical cut, strengthens the cognitive process. This website is a fabulous multi-scale tool to teach and to learn the veterinary anatomy. [less ▲]

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See detailCompared sensitivities of VLT, JWST and ELT for direct exoplanet detection in nearby stellar moving groups
Hanot, Charles ULg; Absil, Olivier ULg; Surdej, Jean ULg et al

in Oschmann, J.; Clampin, M.; MacEwen, H. (Eds.) Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave (2010, July)

In the context of exoplanet detection, a large majority of the 400 detected exoplanets have been found by indirect methods. Today, progress in the field of high contrast and angular resolution imaging has ... [more ▼]

In the context of exoplanet detection, a large majority of the 400 detected exoplanets have been found by indirect methods. Today, progress in the field of high contrast and angular resolution imaging has allowed direct images of several exoplanetary systems to be taken (cf. HR 8799, Fomalhaut and β Pic).[SUP]1-4[/SUP] In the near future, several new instruments are going to dramatically improve our sensitivity to exoplanet detection. Among these, SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch) at the VLT, MIRI (Mid Infra-Red Instrument) onboard JWST and EPICS at the ELT will be equipped with coronagraphs to reveal faint objects in the vicinity of nearby stars. We made use of the Lyon group (COND) evolutionary models of young (sub-)stellar objects and exoplanets to compare the sensitivities of these different instruments using their estimated coronagraphic profiles. From this comparison, we present a catalogue of targets which are particularly well suited for the different instruments. [less ▲]

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See detailCompared sensitivity of VLT, JWST and ELT for direct exoplanet detection in nearby stellar moving groups
Hanot, Charles ULg; Absil, Olivier ULg; Surdej, Jean ULg et al

in Villegas, Daniela; Kissler-Patig, Markus (Eds.) JWST and the ELTs: An ideal Combination (2010)

In the context of exoplanet detection, a large majority of the 400 detected exoplanets have been found by indirect methods. Today, progress in the field of high contrast imaging has allowed direct images ... [more ▼]

In the context of exoplanet detection, a large majority of the 400 detected exoplanets have been found by indirect methods. Today, progress in the field of high contrast imaging has allowed direct images of several exoplanetary systems to be taken (cf. HR 8799, Fomalhaut). In the near future, several new instruments are going to dramatically improve our sensitivity to exoplanet detection. Among these, SPHERE ( Spectro Polarimetric High contrast Exoplanet REsearch ) at the VLT, MIRI ( Mid Infra-Red Instrument) onboard JWST and the ELT will be equipped with coronagraphs to reveal faint objects in the vicinity of nearby stars. We made use of the Lyon group (COND) evolutionary models of young (sub-) stellar objects and exoplanets to compare the sensitivity of these different instruments using their estimated coronagraphic profiles. From this comparison, we present a catalogue of targets which are particularilly well suited for the different instruments. [less ▲]

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See detailComparer les historiographies littéraires de la francophonie Nord. Repérages du repérable
Provenzano, François ULg

Master of advanced studies dissertation (2005)

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See detailComparing Ape Densities and Habitats in Northern Congo: Surveys of Sympatric Gorillas and Chimpanzees in the Odzala and Ndoki Regions
Devos, Céline; Sanz, C.; Morgan, D. et al

in American Journal of Primatology (2008), 70(5), 438-451

The conservation status of western lowland gorillas and central chimpanzees in western equatorial Africa remains largely speculative because many remote areas have never been surveyed and the impact of ... [more ▼]

The conservation status of western lowland gorillas and central chimpanzees in western equatorial Africa remains largely speculative because many remote areas have never been surveyed and the impact of emergent diseases in the region has not been well documented. In this study, we compared ape densities and habitats in the Lokoue study area in Odzala National Park and the Goualougo Triangle in Nouabale-Ndoki National Park in northern Republic of Congo. Both of these sites have long been considered strongholds for the conservation of chimpanzees and gorillas, but supposedly differ in vegetative composition and relative ape abundance. We compared habitats between these sites using conventional ground surveys and classified Landsat-7 ETM+ satellite images. We present density estimates via both standing-crop and marked-nest methods for the first time for sympatric apes of the Congo Basin. The marked-nest method was effective in depicting chimpanzee densities, but underestimated gorilla densities at both sites. Marked-nest surveys also revealed a dramatic decline in the ape population of Lokoue which coincided with a local Ebola epidemic. Normal baseline fluctuations in ape nest encounter rates during the repeated passages of marked-nest surveys were clearly distinguishable from a 80% decline in ape nest encounter rates at Lokoue. Our results showed that ape densities, habitat composition, and population dynamics differed between these populations in northern Congo. We emphasize the importance of intensifying monitoring efforts and further refinement of ape survey methods, as our results indicated that even the largest remaining ape populations in intact and protected forests are susceptible to sudden and dramatic declines. Am. J. Primatol. 70:1-13, 2008. (c) 2008 Wiley-Liss, Inc. [less ▲]

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See detailComparing Co-Parenting Among Gay- and Straight-Parented Triads
D'Amore, Salvatore ULg; Miscioscia, Marina ULg; Delvoye, Marie

in Psychology, Community & Heath (2013), 2(2), 87-88

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See detailComparing CO2 storage and advection conditions at night at different carboeuroflux sites
Aubinet, Marc ULg; Berbigier, P.; Bernhofer, C. H. et al

in Boundary-Layer Meteorology (2005), 116(1), 63-94

Anemometer and CO2 concentration data from temporary campaigns performed at six CARBOEUROFLUX forest sites were used to estimate the importance of non-turbulent fluxes in nighttime conditions. While ... [more ▼]

Anemometer and CO2 concentration data from temporary campaigns performed at six CARBOEUROFLUX forest sites were used to estimate the importance of non-turbulent fluxes in nighttime conditions. While storage was observed to be significant only during periods of both low turbulence and low advection, the advective fluxes strongly influence the nocturnal CO2 balance, with the exception of almost flat and highly homogeneous sites. On the basis of the main factors determining the onset of advective fluxes, the 'advection velocity', which takes net radiation and local topography into account, was introduced as a criterion to characterise the conditions of storage enrichment/depletion. Comparative analyses of the six sites showed several common features of the advective fluxes but also some substantial differences. In particular, all sites where advection occurs show the onset of a boundary layer characterised by a downslope flow, negative vertical velocities and negative vertical CO2 concentration gradients during nighttime. As a consequence, vertical advection was observed to be positive at all sites, which corresponds to a removal of CO2 from the ecosystem. The main differences between sites are the distance from the ridge, which influences the boundary-layer depth, and the sign of the mean horizontal CO2 concentration gradients, which is probably determined by the source/sink distribution. As a consequence, both positive and negative horizontal advective fluxes (corresponding respectively to CO2 removal from the ecosystem and to CO2 supply to the ecosystem) were observed. Conclusive results on the importance of non-turbulent components in the mass balance require, however, further experimental investigations at sites with different topographies, slopes, different land covers, which would allow a more comprehensive analysis of the processes underlying the occurrence of advective fluxes. The quantification of these processes would help to better quantify nocturnal CO2 exchange rates. [less ▲]

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See detailComparing control strategies using experimental and simulation results: Methodology and application to heating control of passive solar buildings
Kummert, M.; Andre, Philippe ULg; Argiriou, A.

in HVAC & R Research (2006), 12(3A Sp. Iss. SI), 553-575

Different heating system controllers for passive solar buildings are compared on two different buildings. The performance criterion combines energy performance and thermal comfort using the "cost function ... [more ▼]

Different heating system controllers for passive solar buildings are compared on two different buildings. The performance criterion combines energy performance and thermal comfort using the "cost function" paradigm. The experimental facilities did not allow a direct experimental comparison by using two identical buildings. The controllers were implemented alternately in one building and a performance comparison was obtained in two ways: first by identifying short periods that have similar driving variables (weather conditions and building occupancy) and comparing the experimental results obtained in both cases. The second method mixes experiments and simulation using a well-tuned model of the building and its occupants. This paper discusses the results obtained using the above methods and shows that both methods give consistent estimates of the difference between controllers and the second method allows extrapolation of useful information from the limited data available. [less ▲]

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