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See detailEvaluation of chicory seeds maturity by chlorophyll fluorescence imaging
Ooms, David ULg; Destain, Marie-France ULg

in Biosystems Engineering (2011), 110

Chicory (Cichorium intybus L.) seed production includes sorting to remove foreign materials and non-viable seeds. A machine vision system was developed to monitor the fluorescence in order to detect the ... [more ▼]

Chicory (Cichorium intybus L.) seed production includes sorting to remove foreign materials and non-viable seeds. A machine vision system was developed to monitor the fluorescence in order to detect the immature chicory seeds. It comprised a monochromatic light source, a highpass filter and a monochromatic CCD camera sensitive to red and infrared. With this device, blue light reflected by the seeds was blocked whilst red fluorescence was measured by the camera. A segmentation algorithm was designed to estimate separately the fluorescence intensities of the pappus, a crown of scales, and the main body of the pericarp. Experiments were carried out on five clones of cross-pollinated chicory plants used for seed production. Two hundred flower heads were labelled at flowering and harvested at different times during the maturation process expressed in “days after flowering” (DAF). Germination tests were performed according to the recommendations of the International Seed Testing Association to measure the germination percentage (GP) and the germination rate (GR), an indicator of seed vigour. Seed chlorophyll content diminished during maturation following a different logistic trend for the pappus and the pericarp. The GP increased from 18 DAF to reach its maximum value at 21 DAF, but the GR remained low until 30 DAF and increased afterwards. The potential of chlorophyll fluorescence to be used as an indicator of chicory seed vigour was the greatest between 21 and 36 DAF. [less ▲]

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See detailEvaluation of chlorine containing cellulose-based chiral stationary phases for the LC enantioseparation of basic pharmaceuticals using polar non-aqueous mobile phases.
Dossou, Katina S. S.; CHIAP, Patrice ULg; Servais, Anne-Catherine ULg et al

in Journal of Separation Science (2011), 34(6), 617-22

The discrimination ability of three cellulose-based chiral stationary phases (CSPs) was evaluated towards the enantiomers of basic drugs, using ACN as the main solvent in polar organic mobile phases. The ... [more ▼]

The discrimination ability of three cellulose-based chiral stationary phases (CSPs) was evaluated towards the enantiomers of basic drugs, using ACN as the main solvent in polar organic mobile phases. The study was focused on CSPs containing cellulose tris(3-chloro-4-methylphenylcarbamate) (3-Cl-4-MePC), cellulose tris(4-chloro-3-methylphenylcarbamate) (4-Cl-3-MePC) or cellulose tris(3,5-dichlorophenylcarbamate) (3,5-diClPC) as the chiral selector. The behaviour of these CSPs was studied systematically in order to investigate the influence of the presence and position of the chlorine substituents on the phenylcarbamate moieties on the retention and resolution of the enantiomers. The evaluation was made with three different generic mobile phases, namely ACN/0.1%DEA/0.1% TFA (DEA, diethylamine), ACN/0.1%DEA/0.2% FA and ACN/0.1%DEA/0.2%AcA, deduced from the previous study. The nature of the acidic additive and of the chiral selector was found to be particularly important for the retention and enantioresolution of these basic compounds. High-resolution values could be obtained for most studied enantiomers with these CSPs, clearly demonstrating the interest of using them in combination with polar organic mobile phases. However, significant differences in enantioresolution between the CSPs have been observed for many compounds, indicating that these phases seem to be quite complementary. [less ▲]

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See detailEvaluation of circulating irisin levels in healthy young individuals after a single 100,000 IU vitamin D dose.
CAVALIER, Etienne ULg; Mismetti, Valentine; Souberbielle, Jean-Claude

in Annales d'Endocrinologie (in press)

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See detailEvaluation of classical NSAIDS and COX-2 selective inhibitors on purified ovine enzymes and human whole blood
De Leval, X; Dogne, JM; Delange, J et al

in Annals of the Rheumatic Diseases (2001), 60(S1), 343

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See detailEvaluation of classical NSAIDS and COX-2 selective inhibitors on purified ovine enzymes and human whole blood
de Leval, X; Dogne, JM; Delarge, J et al

in Clinical Rheumatology (2001), 20

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See detailEvaluation of classical NSAIDs and COX-2 selective inhibitors on purified ovine enzymes and human whole blood
De Leval, X.; Delarge, J.; Devel, P. et al

in Prostaglandins, Leukotrienes, and Essential Fatty Acids (2001), 64

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See detailEvaluation of classical NSAIDs in a model of human whole blood assay
De Leval, X.; Delarge, J.; Devel, P. et al

Poster (2000, March 04)

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See detailEvaluation of classical NSAIDs on COX-1 and COX-2 purified enzymes and prognosis of their effects on physiological responses
De Leval, X.; Henrotin, Yves ULg; Masereel, B. et al

Poster (1999, November 20)

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See detailEvaluation of classical NSAIDs on COX-1 and COX-2 purified enzymes and prognosis of their effects on physiological responses
De Leval, X.; Henrotin, Y.; Masereel, B. et al

in Fundamental & Clinical Pharmacology (2000), 14

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See detailEvaluation of classical NSAIDS on COX-1 and COX-2 purifies enzymes and prognosis of their effects on physiological responses.
De Leval, X.; Henrotin, Yves ULg; Masereel, B. et al

in Fundamental & Clinical Pharmacology (2003), 14

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See detailEvaluation of climate changes impact on the hydrological behaviour of the peaty mediums - Application to the Haute Lesse-Ourthe area (Belgium).
Sohier, Catherine ULg; Dautrebande, Sylvia; Degre, Aurore ULg

Poster (2010, April)

The peaty and wet mediums have a very important role to play in term of biodiversity conservation, hydrologic pattern regulation, fauna habitat and landscape value. In the Haute Lesse – Ourthe catchments ... [more ▼]

The peaty and wet mediums have a very important role to play in term of biodiversity conservation, hydrologic pattern regulation, fauna habitat and landscape value. In the Haute Lesse – Ourthe catchments (Saint-Hubert), numbers of these mediums were strongly modified by a drainage network. This drainage network was implemented to permit a forestry production focussed on the Spruce. It has severely disturbed the hydrological cycle. The study consists in modelling the impacts of restoration practices carried out notably within the framework of the LIFE European project on the hydrological behaviour of the peat bog. Then we modelled the effect of climate change. Physical properties and retention curve of peaty materials were characterized on the basis of undisturbed samples using the Richards’apparatus. Calculations were carried out with the hydrological model EPICgrid (GxABT). The model was initially validated on several reference catchments of the study zone. It was then applied at local scale for various peaty mediums (peat type, drainage characteristics, vegetation type) and for current and future climatic conditions. A regional simulation was finally carried out in order to evaluate the impacts of peat bogs restoration measures at catchment scale. Simulations highlighted the differences in physical and hydrous properties of the different peat types (“true” peat and “degraded” peat). Local and regional impacts of peat bogs restoration on their hydrological behaviour have been evaluated. Eventually, simulations allowed us to evaluate climate change’s impact on the hydrological behaviour of the peaty mediums. The model showed notably that future climatic conditions could generate severe droughts which can become critical in some situations. [less ▲]

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See detailEvaluation of computed tomographic anatomy of the equine metacarpophalangeal joint
Vanderperren, K.; Ghaye, Benoit ULg; Hoegaerts, M. et al

in American Journal of Veterinary Research (2008), 69(5), 631-638

OBJECTIVE: To determine the detailed computed tomography (CT) anatomy of the metacarpophalangeal (MCP) joint in healthy horses. SAMPLE POPULATION: 10 cadaveric forelimbs from 10 adult horses without ... [more ▼]

OBJECTIVE: To determine the detailed computed tomography (CT) anatomy of the metacarpophalangeal (MCP) joint in healthy horses. SAMPLE POPULATION: 10 cadaveric forelimbs from 10 adult horses without orthopedic disease. PROCEDURES: CT of the MCP joint was performed on 4 forelimbs. In 1 of the limbs, CT was also performed after intra-articular injection of 30 mL of contrast medium (40 mg of iodine/mL). Transverse slices 1-mm thick were obtained, and sagittal and dorsal planes were reformatted with a slice thickness of 2 mm. The CT images were matched with corresponding anatomic slices from 6 additional forelimbs. RESULTS: The third metacarpal bone, proximal sesamoid bones, and proximal phalanx could be clearly visualized. Common digital extensor tendon; accessory digital extensor tendon; lateral digital extensor tendon; superficial digital flexor tendon (including manica flexoria); deep digital flexor tendon; branches of the suspensory ligament (including its attachment); extensor branches of the suspensory ligament; collateral ligaments; straight, oblique, and cruciate distal sesamoidean ligaments; intersesamoidean ligament; annular ligament; and joint capsule could be seen. Collateral sesamoidean ligaments and short distal sesamoidean ligaments could be localized but not at all times clearly identified, whereas the metacarpointersesamoidean ligament could not be identified. The cartilage of the MCP joint could be assessed on the postcontrast sequence. CONCLUSIONS AND CLINICAL RELEVANCE: CT of the equine MCP joint can be of great value when results of radiography and ultrasonography are inconclusive. Images obtained in this study may serve as reference for CT of the equine MCP joint. [less ▲]

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See detailEvaluation of concrete substrate prior to overlay. Bonded concrete overlays – Recommendations and Applications
Courard, Luc ULg

Conference (2006)

The knowledge and analysis of the causes of degradations is the first step in repairing existing concrete structures. The assessment is performed by using destructive and non destructive methods. These ... [more ▼]

The knowledge and analysis of the causes of degradations is the first step in repairing existing concrete structures. The assessment is performed by using destructive and non destructive methods. These allow to detect modification of physical, chemical and/or mechanical properties of concrete: cracking, deformation, spalling, carbonation, …etc are various causes of distress, with potential irreversible consequences on concrete structure behaviour. A description of specific methods for pavements and structural slabs is proposed; it is usually recommended to combine complementary methods for efficient diagnosis. This chapter wants to offer an overview of techniques and references that could help the user in selecting the most appropriate investigation program. [less ▲]

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See detailEvaluation of cryopreservation techniques for goat embryos
Fiéni, F.; Beckers, Jean-François ULg; Buggin, M. et al

in Reproduction Nutrition Development (1995), 35

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See detailEvaluation of Ct Time-Density Curves of Lower-Limb Veins
Szapiro, D.; Ghaye, Benoît ULg; Willems, V. et al

in Investigative Radiology (2001), 36(3), 164-9

Szapiro D, Ghaye B, Willems V, et al. Evaluation of CT time-density curves of lower-limb veins. Invest Radiol 2001;36:164-169.RATIONALE AND OBJECTIVES: To evaluate time-density curves of the lower-limb ... [more ▼]

Szapiro D, Ghaye B, Willems V, et al. Evaluation of CT time-density curves of lower-limb veins. Invest Radiol 2001;36:164-169.RATIONALE AND OBJECTIVES: To evaluate time-density curves of the lower-limb veins for optimization of CT venography. METHODS: Fifty patients referred for chest CT were randomized into five equal groups. Five anatomic levels (abdomen, pelvis, proximal thigh, knee, and midcalf) were evaluated by a dynamic acquisition during 7 minutes. Computed tomography attenuation values of the veins, arteries, and adjacent muscles were measured for each level and plotted into curves versus time. Venous enhancement was also assessed qualitatively. RESULTS: Mean peak enhancement values of the inferior vena cava and the iliac, femoral, popliteal, anterior tibial, posterior tibial, and peroneal veins were, respectively, 112 +/- 16, 103 +/- 17, 93 +/- 23, 98 +/- 30, 112 +/- 28, 137 +/- 28, and 124 +/- 29 Hounsfield units. These were reached at 93 +/- 9.5, 129 +/- 15, 135 +/- 20, 147 +/- 57, 124 +/- 32, 123 +/- 17, and 123 +/- 18 seconds. Homogeneous opacification was obtained after 210 seconds. An optimal time window for CT venography was obtained between 210 and 240 seconds for the calf level and between 180 and 300 seconds for above-knee veins. CONCLUSIONS: For sequential CT venography, a caudocranial acquisition of the lower-limb veins, starting at 210 seconds, should allow optimal clot detection. [less ▲]

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See detailEvaluation of DCE-MRI postprocessing techniques to assess metastatic bone marrow in patients with prostate cancer
Michoux, Nicolas; SIMONI, Paolo ULg; Tombal, Bertrand et al

in Clinical Imaging (2012)

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See detailEvaluation of decision methodologies for analytical method validation
Rozet, Eric ULg; Rudaz, S.; Bouabidi, A. et al

Poster (2009)

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See detailEvaluation of deep water circulation with natural C-14 and helium-3 during OCMIP-2
Dutay, J.-C; Jean-Baptiste, P; Maier-Reimer, E. et al

Conference (2002, May)

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See detailEvaluation of dental pulp temperature rise during photo-activated decontamination (PAD) of caries: an in vitro study.
Nammour, S.; Zeinoun, T.; Bogaerts, I. et al

in Lasers in Medical Science (2009)

Photo-activated decontamination (PAD) has been reported in caries treatment as an aid in dentine decontamination. The aim of this study is to verify the harmlessness for pulp vitality of photo-activated ... [more ▼]

Photo-activated decontamination (PAD) has been reported in caries treatment as an aid in dentine decontamination. The aim of this study is to verify the harmlessness for pulp vitality of photo-activated decontamination (PAD) in caries treatment. Twenty freshly extracted single-rooted teeth were used. Deep class I cavities with a </= 0.5 mm dentine thickness between the floor of the cavity and the roof of cameral pulp were prepared. Following the manufacturer's instructions, cavities were filled with a photo-sensitizer (Phenothiazinechloride: 10 mg /ml), irradiated during 30 s with a 660-nm diode laser (output power: 40 mW in continuous wave; total delivered energy density: 4.87 J/cm(2)). Pulp temperature raises were recorded using a thermocouple (ALCr). Measurements were recorded every second during the irradiation and 150 s afterwards. Six records were repeated for each tooth. After 30 s of irradiation, the mean of temperature rise was 0.83 degrees C +/- 0.22 degrees C. All records showed temperature increases lower than the 3 degrees C (safety level for pulp injury). Based on our in vitro study, we can conclude that the dental pulp temperature rise following the use of PAD technique for the decontamination of dentine can be considered as save procedure for pulp vitality. [less ▲]

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See detailEvaluation of dietary stevioside supplementation on anti-human serum albumin immunoglobulin G, Alpha-1-glycoprotein, body weight and thyroid hormones in broiler chickens.
Daneshyar, M.; Geuns, J. M. C.; Willemsen, H. et al

in Journal of animal physiology and animal nutrition (2012), 96(4), 627-33

Sixty male broiler chickens fed a diet supplemented with 130 mg/kg stevioside (S group) or an unsupplemented diet (C group) from day 1 of age onwards. On day 21 of age, ten birds from either the S (SH) or ... [more ▼]

Sixty male broiler chickens fed a diet supplemented with 130 mg/kg stevioside (S group) or an unsupplemented diet (C group) from day 1 of age onwards. On day 21 of age, ten birds from either the S (SH) or C (CH) group were injected subcutaneously with 100 mug human serum albumin (HSA) and ten others from either S (SP) or C (CP) group injected with 100 mul phosphate-buffered saline (PBS) in the same way. There were no significant effect of supplementation nor interaction with age on average body weights, T(3) and T(4) concentrations of non-injected chickens. After the primary immunization, alpha(1) -glycoprotein concentrations increased in all treatment groups except the CP group, and were significantly higher in the CH group in relation to the other groups. Fourteen and 18 days after the primary immunization, HSA injected chickens of both dietary treatments had significantly higher anti-HSA immunoglobulin G (IgG) levels than their PBS injected controls. No effect of stevioside supplementation was observed for IgG level. In conclusion, dietary stevioside inclusion can attenuate the pro-inflammatory response after stimulation of the innate immune response in broiler chickens. [less ▲]

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