Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailPotential neuroprotective properties of atracurium and cisatracurium in neurosurgical anaesthesia
Hans, Pol ULg; Bonhomme, Vincent ULg

in European Journal of Anaesthesiology (2004), 21(4), 334-335

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailPOTENTIAL OF A NETWORK OF ELECTRONIC NOSES TO ASSESS IN REAL TIME THE ODOUR ANNOYANCE IN THE ENVIRONMENT OF A COMPOST FACILITY
Nicolas, Jacques ULg; Cerisier, C; Romain, Anne-Claude ULg et al

in Del Rosso, Renato (Ed.) Chemical engineering transactions : NOSE2012 International Conference on Environmental Odour (2012, September)

Detailed reference viewed: 24 (7 ULg)
Full Text
Peer Reviewed
See detailPotential of an in vitro toolbox combined with exposure data as a first step for the risk assessment of dietary chemical contaminants
Ribonnet, Laurence; Van Der Heiden, Edwige ULg; Nobels, Ingrid et al

in Food Additives & Contaminants (2011), 28(9), 1136-1158

In vitro risk assessment of dietary contaminants has become a priority in human food safety. This paper proposes an in vitro approach associating different complementary tools in an original toolbox and ... [more ▼]

In vitro risk assessment of dietary contaminants has become a priority in human food safety. This paper proposes an in vitro approach associating different complementary tools in an original toolbox and aims to improve the assessment of the toxicological impact of dietary contaminants at realistic human exposure levels, with a special focus on the intestinal compartment. The system is based on the use of four complementary cellular tools, namely stress gene induction in transgenic strains of Escherichia coli, modulation of the activity of key biotransformation enzymes (cytochrome P-450 (CYP) 1A1 and 3A4) in a human intestinal cell line, and activation of aryl hydrocarbon receptor (AhR) and oestrogenic receptor (ER)-dependent genes in agonistic and antagonistic assays with luciferase reporter cells. It was applied to four chosen model molecules: ochratoxin A (OTA) and deoxynivalenol (DON), two common food-borne mycotoxins, and imazalil (IMA) and benomyl (BEN), two fungicides widely occurring in foodstuffs. All these assays were performed at or around a realistic intestinal concentration, determined through a deterministic approach based on the calculation of a theoretical maximum daily intake (TMDI). Using the four model molecules, it is clearly highlighted that induction of CYP1A1 activity and inhibition of CYP3A4 activity occurred in Caco-2 cells at a realistic intestinal concentration of IMA. Furthermore, some bacterial stress genes were induced in a range of realistic concentrations, following exposure to DON and IMA. In addition, BEN clearly provoked an ER agonistic activity in a human oestrogen sensitive reporter cell line. All these results are in accordance with the literature, suggesting that the in vitro toolbox constitutes an interesting approach in order to obtain a first 'fingerprint' of dietary contaminants at realistic human exposure for further risk assessment. [less ▲]

Detailed reference viewed: 12 (0 ULg)
See detailPotential of balloon payloads for in flight validation of direct and nulling interferometry concepts
Demangeon, Olivier; Ollivier, Marc; Le Duigou, Jean-Michel et al

in Danchi, W. C.; Delplancke, F.; Rajagopal, J. K. (Eds.) Optical and Infrared Interferometry II (2010, July)

While the question of low cost / low science precursors is raised to validate the concepts of direct and nulling interferometry space missions, balloon payloads offer a real opportunity thanks to their ... [more ▼]

While the question of low cost / low science precursors is raised to validate the concepts of direct and nulling interferometry space missions, balloon payloads offer a real opportunity thanks to their relatively low cost and reduced development plan. Taking into account the flight capabilities of various balloon types, we propose in this paper, several concepts of payloads associated to their flight plan. We also discuss the pros and cons of each concepts in terms of technological and science demonstration power. [less ▲]

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailPotential of CE/MS for Small Carboxylic Acids Analysis as Alternative to GC/MS Reference Analytical Methods
Far, Johann ULg; Falmagne, Jean-Bernard, ANALIS R&D; de l'Escaille, François, ANALIS R&D et al

Poster (2012, October)

GC/MS (Gas Chromatography coupled to Mass Spectrometry) is the analytical method of choice for carboxylic acids analysis because of good sensitivity, low limit of detection and the possibility to compare ... [more ▼]

GC/MS (Gas Chromatography coupled to Mass Spectrometry) is the analytical method of choice for carboxylic acids analysis because of good sensitivity, low limit of detection and the possibility to compare the pattern of fragmentation with existing databases for identification. However GC requires that the analytes are volatile. If it is not the case, the use of chemicals in order to perform the derivatization is mandatory, this may induce analytical bias. CE (Capillary electrophoresis) is a technique of choice for ions separation without prior treatments. The method is fast and do not require highly technical skills. A UV detector is the most common detection method; however electrospray mass spectrometry detection is recently gaining interest, while it really helps for structural information of the detected compounds. In this poster, the preliminary results of CE/MS analysis of several carboxylic acids are presented. All carboxylic acids are analyzed without any sample pretreatment. These acids looked at are from the “Citric Acid Cycle” including pyruvate and some isotope labeled analogues but also glyoxylate, lactate, oxalate and tartrate. Moreover, the preliminary results of a sample preparation approach to remove phosphate salts are presented. Phosphate is a very common salt that is often used in biological buffers but prevents the derivatization of carboxylic acid for GC/MS analysis and reduces the reproducibility of results for both GC/MS and CE/MS analysis. [less ▲]

Detailed reference viewed: 44 (5 ULg)
Full Text
Peer Reviewed
See detailPotential of Dried Egg Yolk as a Source of Immunoglobulins to Control Salmonella in the Gastrointestinal Tract of the Broiler Chicken
Marcq, Christopher ULg; Portetelle, Daniel ULg; Chalghoumi, RAJA ULg et al

in 17th European Symposium on Poultry Nutrition : Proceedings & Abstracts (2009, August)

Egg yolk immunoglobulins (IgY) are considered as a promising tool of establishing passive immunity against enteric pathogens (e.g. Salmonella) in poultry (Kovacs-Nolan and Mine, 2005). In our previous ... [more ▼]

Egg yolk immunoglobulins (IgY) are considered as a promising tool of establishing passive immunity against enteric pathogens (e.g. Salmonella) in poultry (Kovacs-Nolan and Mine, 2005). In our previous works, in-feed incorporation of freeze-dried yolk powder (FYP) improved performances of Salmonella-infected broilers (Marcq et al., 2009). Nevertheless, no extra value could be attributed to the presence of specific IgY when a comparison was done between impact of hyperimmune or non immune FYP both concerning growth performances and Salmonella infection. We hypothesized that these inconclusive in vivo results were related to the sensitivity of IgY to gastrointestinal conditions. Egg yolks with high IgY titers directed against Salmonella Enteritidis and Typhimurium were obtained from laying hens immunized as previously described (Chalghoumi et al., 2008). Three feed additives derived from these eggs were produced: FYP, spray-dried yolk powder (SYP), and freeze-dried water-soluble fraction of yolk powder (WSFP). A force-feeding assay was realized on these additives with 48 five-week-old males Ross broiler chicken (Salmonella spp.-free status). Survival of undigested IgY and bioactive Fab fragments was evaluated in the intestinal tract by ELISA. Statistical analyses were done using GLM procedure of Minitab 15.1. Software. Differences were considered significant when P<0.05. As a result of the digestive process, the levels of total and specific undigested IgY found throughout the intestine were dramatically reduced for the three additives. For FYP, no difference was observed with intestinal contents of control animals (P>0.05) and for WSFP, which correspond to semi-purified IgY, the immunological activity reached the same level than that for SYP (P>0.05) whereas its initial level was almost ten times higher. The results suggest a protective effect of whole yolk on IgY with SYP but such effect was not observed with FYP. High levels of Fab fragments were identified in intestinal contents, highlighting the importance of protein digestion in the digestive tract and especially pepsin digestion. These Fab fragments conserve their immunological functionality and remained detectable in all intestinal segments including the caecum which represents the major site of Salmonella infection in poultry. These results can explain our previous challenge data and reveal that a protection treatment should be applied to dried egg yolk to improve the resistance of IgY to gastrointestinal conditions in broilers. [less ▲]

Detailed reference viewed: 105 (29 ULg)
Peer Reviewed
See detailPotential of electrical imaging to constrain saltwater intrusion models: 2D numerical simulations
Kemna, A.; Nguyen, Frédéric ULg; Antonsson, A. et al

(2006)

Detailed reference viewed: 22 (6 ULg)
Full Text
Peer Reviewed
See detailPotential of kenaf (Hibiscus cannabinus L.) and corn (Zea mays L.) for phytoremediation of dredging sludge contaminated by trace metals
Arbaoui, Sarra; Evlard, Aricia ULg; Mhamdi, Mohamed El Wafi et al

in Biodegradation (2013)

The potential of kenaf (Hibiscus cannabinusL.) and corn (Zea mays L.) for accumulation of cadmium and zinc was investigated. Plants have been grown in lysimetres containing dredging sludge, a substratum ... [more ▼]

The potential of kenaf (Hibiscus cannabinusL.) and corn (Zea mays L.) for accumulation of cadmium and zinc was investigated. Plants have been grown in lysimetres containing dredging sludge, a substratum naturally rich in trace metals. Biomass production was determined. Sludge and water percolating from lysimeters were analyzed by atomic absorption spectrometry.No visible symptoms of toxicity were observed during the three- month culture. Kenaf and corn tolerate trace metals content in sludge. Results showed that Zn and Cd were found in corn and kenaf shoots at different levels,2.49 mg/kg of Cd and 82.5 mg/kg of Zn in kenaf shoots and2.1mg/kgofCdand10.19mg/kgincornshoots. Quantities of extracted trace metals showed that decontamination of Zn and Cd polluted substrates is possible by corn and kenaf crops. Tolerance and bioaccumulation factors indicated that both species could be used in phytoremediation. [less ▲]

Detailed reference viewed: 41 (17 ULg)
Full Text
Peer Reviewed
See detailPotential Of Local Agricultural By-Products For The Rearing Of African Catfish Clarias Gariepinus In Rwanda: Effects On Growth, Feed Utilization And Body Composition
Nyina-Wamwiza, Laeticia; Wathelet, Bernard ULg; Kestemont, Patrick

in Aquaculture Research (2007), 38(2),

Detailed reference viewed: 19 (6 ULg)
Peer Reviewed
See detailPotential of maximal ventilation as a sire selection criterion to reduce respiratory disease severity in beef cattle
Bureau, Fabrice ULg; Uystepruyst, Ch; Coghe, J. et al

in Proceedings: 16th Comparative Respiratory Society Meeting (1998)

Detailed reference viewed: 4 (0 ULg)
Full Text
See detailPotential of mid-infrared spectrometry for prediction of fatty acid contents in cow milk
Soyeurt, Hélène ULg; Dehareng, Frédéric; Dardenne, Pierre et al

Poster (2006)

Detailed reference viewed: 33 (2 ULg)
Full Text
See detailPotential of mid-infrared spectrum of milk to detect changes in the physiological status of dairy cows
Laine, Aurélie ULg; Goubau, Amaury; Hammami, Hedi ULg et al

in Journal of Dairy Science (2013)

Detailed reference viewed: 24 (12 ULg)
Full Text
See detailThe potential of MIR spectra to certify milk geographic origin
Dale, Laura-Monica ULg; Laine, Aurélie ULg; Goubau, Amaury et al

in 64rd Annual Meeting of the European Federation of Animal Science (2013, August 26)

Protecting and supporting local production systems, regional authorities, as well as producers, give a very important role to milk quality. Therefore, this study was aimed to investigate the potential of ... [more ▼]

Protecting and supporting local production systems, regional authorities, as well as producers, give a very important role to milk quality. Therefore, this study was aimed to investigate the potential of mid-infrared spectroscopy (MIR) for certifying the geographic origin of milk. Because milk MIR spectral databases and extra phenotypes (breed, testday, livestock herd and origin appellation of traditional products) were available in the Belgium Walloon Region via European project OptiMIR (INTERREG IVB North West Europe Program), discrimination studies were conducted to distinguish Ardennes region (which is linked to PDO “Beurre d’Ardennes”) from the rest of Wallonia. A total of 542,733 spectral records linked to their geographic origin coming from Wallonia milk recording were used (97,369 of MIR spectra -Ardennes region and 450,326 -rest of Wallonia). A mixed model (fixed: breed, year and month of record, random: herd x year) was applied to obtain predicted MIR spectral values for all testdays and prediction errors (residuals) representing the factors not present in the model. In order to test the MIR ability to milk authentication, chemometric tools, such as partial least squat regression and linear discriminant analysis were applied to residuals for three MIR spectral regions (e.g. 930-1600 cm-1, 1710-1810 cm-1 and 2560-2990 cm-1). The classifications on not-corrected MIR spectral data were 95% and the cross-validation were 95% for Ardennes region. Results showed after correction of MIR spectra, the discriminant function constructed on the residuals spectra allowed a good discrimination. The results show that MIR spectroscopy techniques may provide useful fingerprints to detect geographic origin and could be potentially used in routine management decision and quality assurance tools. [less ▲]

Detailed reference viewed: 26 (12 ULg)
Full Text
See detailPotential of near infrared spectroscopy for on-line analysis at the milking parlour using a fiber-optic probe presentation
Nguyen, Hoang Nam; Dehareng, Frédéric; Hammida, Mohamed et al

in NIR news (2011), 22

Detailed reference viewed: 38 (4 ULg)
Full Text
See detailThe potential of rotating-baseline nulling interferometers operating within large single-telescope apertures
Serabyn, E.; Mennesson, B.; Martin, Stefan et al

in Danchi, W. C.; Delplancke, F.; Rajagopal, J. K. (Eds.) Optical and Infrared Interferometry II (2010, July 01)

The use of a rotating-baseline nulling interferometer for exoplanet detection was proposed several decades ago, but the technique has not yet been fully demonstrated in practice. Here we consider the ... [more ▼]

The use of a rotating-baseline nulling interferometer for exoplanet detection was proposed several decades ago, but the technique has not yet been fully demonstrated in practice. Here we consider the faint companion and exozodiacal disk detection capabilities of rotating-baseline nulling interferometers, such as are envisioned for space-based infrared nullers, but operating instead within the aperture of large single telescopes. In particular, a nulling interferometer on a large aperture corrected by a next-generation extreme adaptive optics system can provide deep interferometric contrasts, and also reach smaller angles (sub λ/D) than classical coronagraphs. Such rotating nullers also provide validation for an eventual space-based rotating-baseline nulling interferometer. As practical examples, we describe ongoing experiments with rotating nullers at Palomar and Keck, and consider briefly the case of the Thirty Meter Telescope. [less ▲]

Detailed reference viewed: 11 (2 ULg)
Full Text
See detailPotential of Shallow Lake Systems to Trace Environmental Changes Caused by Earthquakes
Avsar, Ulas; Boes, X; Hubert, Aurelia ULg et al

in Geophysical Research Abstracts (2007, April), 9

Detailed reference viewed: 10 (0 ULg)
Full Text
See detailPotential of Shallow Lake Systems to Trace Environmental Changes Caused by Earthquakes
Avsar; Boes; Hubert-Ferrari et al

Poster (2007)

Detailed reference viewed: 7 (0 ULg)