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See detailDevelopment of nuclear SNP markers for genetic tracking of Iroko, Milicia excelsa and Milicia regia
Blanc-Jolivet, Céline; Kersten, Birgit; Daïnou, Kasso ULiege et al

in Conservation Genetics Resources (2017)

Iroko, Milicia excelsa, is an economically important tropical hardwood species widely distributed in tropical Africa, from Ivory Coast in Western Africa to Tanzania in Eastern Africa. The species occurs ... [more ▼]

Iroko, Milicia excelsa, is an economically important tropical hardwood species widely distributed in tropical Africa, from Ivory Coast in Western Africa to Tanzania in Eastern Africa. The species occurs at low densities in contrasting habitats such as rainforest and woodlands. Former studies using chloroplast and nuclear sequences, as well as nSSRs, revealed a strong differentiation within the species among West and Central African populations and the presence of three genetic groups in Central Africa (Daïnou et al. 2010, 2014). The genus Milicia also includes another species, M. regia, co-occurring with M. excelsa in West Africa. Both species can be identified genetically and morphologically (Daïnou et al. 2014), but identification is difficult in the field. Although the spatial genetic structure of the species is well described, it is mostly based on nSSRs. Despite their lower diversity, SNP markers provide several advantages including the uncomplicated standardization of data among laboratories and the easy, rapid and low-cost development of markers for large sets of loci. These features make SNPs the ideal markers for setting up genetic reference data for timber tracking (Blanc-Jolivet and Liesebach 2015; Degen et al. 2017; Jardine et al. 2016; Pakull et al. 2016). In this paper, we describe the development of a new set of nuclear SNPs on M. excelsa meant to be used for genetic timber tracking. [less ▲]

Detailed reference viewed: 71 (6 ULiège)
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See detailDevelopment of nuclear SNP markers for the timber tracking of the African tree species Sapelli, Entandrophragma cylindricum
Blanc-Jolivet, Céline; Kersten, Birgit; Bourland, Nils et al

in Conservation Genetics Resources (2017)

We describe the development of new nuclear SNP markers for the genetic timber tracking of the geographical origin of Sapelli, Entandrophragma cylindricum (Meliaceae). Restriction associated DNA sequencing ... [more ▼]

We describe the development of new nuclear SNP markers for the genetic timber tracking of the geographical origin of Sapelli, Entandrophragma cylindricum (Meliaceae). Restriction associated DNA sequencing (RADseq) of two reference individuals yielded 1131 putative SNPs. Among those, 131 were selected to design four MassARRAY multiplexes and screened at 178 individuals. Seventy-two loci were selected for further use in genetic tracking. [less ▲]

Detailed reference viewed: 29 (14 ULiège)
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See detailDevelopment of Numerical Algorithms for Practical Computation of Nonlinear Normal Modes
Peeters, Maxime ULiege; Georgiades, Fotios; Viguié, Régis ULiege et al

in International Conference on Noise and vibration Engineering, Leuven, 2006 (2006)

When resorting to numerical algorithms, we show that nonlinear normal mode (NNM) computation is possible with limited implementation effort, which paves the way to a practical method for determining the ... [more ▼]

When resorting to numerical algorithms, we show that nonlinear normal mode (NNM) computation is possible with limited implementation effort, which paves the way to a practical method for determining the NNMs of nonlinear mechanical systems. The proposed method relies on two main techniques, namely a shooting procedure and a method for the continuation of NNM motions. In addition, sensitivity analysis is used to reduce the computational burden of the algorithm. A simplified discrete model of a nonlinear bladed disk is considered to demonstrate the developments. [less ▲]

Detailed reference viewed: 66 (10 ULiège)
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See detailDevelopment of Object and Grasping Knowledge by Robot Exploration
Kraft, Dirk; Detry, Renaud ULiege; Pugeault, Nicolas et al

in IEEE Transactions on Autonomous Mental Development (2010), 2(4), 368--383

Detailed reference viewed: 28 (1 ULiège)
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See detailDevelopment of optical ground verification method for mu m to sub-mm reflectors
Stockman, Yvan ULiege; Thizy, Cédric ULiege; Lemaire, Philippe ULiege et al

in Warmbein, B. (Ed.) Proceedings of the 5th International Conference on Space Optics (ICSO) (2004, April 02)

Large reflectors and antennas for the IR to mm wavelength range are being planned for many Earth observation and astronomical space missions and for commercial communication satellites as well. The ... [more ▼]

Large reflectors and antennas for the IR to mm wavelength range are being planned for many Earth observation and astronomical space missions and for commercial communication satellites as well. The challenging tasks of on-ground testing are to achieve the required accuracy in the measurement of the reflector shapes and antenna structures and to verify their performance under simulated space conditions (vacuum, low temperatures). A small number of infrared interferometers have been commercially developed over the last 10 years but their applications have also been limited due to poor dynamic range and the restricted spatial resolution of their detectors. It has therefore been considered essential, from the viewpoint of supporting future ESA exploration missions, to develop and realise suitable verification tools based on infrared interferometry and other optical techniques for testing large reflector structures, telescope configurations and their performances under simulated space conditions. Two methods and techniques are developed at CSL. The first one is an IR-phase shifting interferometer with high spatial resolution. This interferometer shall be used specifically for the verification of high precision IR, FIR and sub-mm reflector surfaces and telescopes under both ambient and thermal vacuum conditions. The second one presented hereafter is a holographic method for relative shape measurement. The holographic solution proposed makes use of a home built vacuum compatible holographic camera that allows displacement measurements from typically 20 nanometres to 25 microns in one shot. An iterative process allows the measurement of a total of up to several mm of deformation. Uniquely the system is designed to measure both specular and diffuse surfaces [less ▲]

Detailed reference viewed: 35 (2 ULiège)
See detailDevelopment of optical ground verification method for mum to sub-mm reflectors
Stockman, Yvan ULiege; Thizy, Cédric ULiege; Lemaire, Philippe ULiege et al

in 5th International Conference on Space Optics (2004, June 01)

Large reflectors and antennas for the IR to mm wavelength range are being planned for many Earth observation and astronomical space missions and for commercial communication satellites as well. Scientific ... [more ▼]

Large reflectors and antennas for the IR to mm wavelength range are being planned for many Earth observation and astronomical space missions and for commercial communication satellites as well. Scientific observatories require large telescopes with precisely shaped reflectors for collecting the electro-magnetic radiation from faint sources. The challenging tasks of on-ground testing are to achieve the required accuracy in the measurement of the reflector shapes and antenna structures and to verify their performance under simulated space conditions (vacuum, low temperatures). Due to the specific surface characteristics of reflectors operating in these spectral regions, standard optical metrology methods employed in the visible spectrum do not provide useful measurement results. The current state-of-the-art commercial metrology systems are not able to measure these types of reflectors because they have to face the measurement of shape and waviness over relatively large areas with a large deformation dynamic range and encompassing a wide range of spatial frequencies. 3-D metrology (tactile coordinate measurement) machines are generally used during the manufacturing process. Unfortunately, these instruments cannot be used in the operational environmental conditions of the reflector. The application of standard visible wavelength interferometric methods is very limited or impossible due to the large relative surface roughnesses involved. A small number of infrared interferometers have been commercially developed over the last 10 years but their applications have also been limited due to poor dynamic range and the restricted spatial resolution of their detectors. These restrictions affect also the surface error slopes that can be captured and makes their application to surfaces manufactured using CRFP honeycomb technologies rather difficult or impossible. It has therefore been considered essential, from the viewpoint of supporting future ESA exploration missions, to develop and realise suitable verification tools based on infrared interferometry and other optical techniques for testing large reflector structures, telescope configurations and their performances under simulated space conditions. The first one is an IR-phase shifting interferometer with high spatial resolution. This interferometer shall be used specifically for the verification of high precision IR, FIR and sub-mm reflector surfaces and telescopes under both ambient and thermal vacuum conditions. The second one presented hereafter is a holographic method for relative shape measurement. The holographic solution proposed makes use of a home built vacuum compatible holographic camera that allows displacement measurements from typically 20 nanometres to 25 microns in one shot. An iterative process allows the measurement of a total of up to several mm of deformation. Uniquely the system is designed to measure both specular and diffuse surfaces. [less ▲]

Detailed reference viewed: 13 (3 ULiège)
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See detailDevelopment of optical trajectography device for the lagangian study of turbulent flow inside a stirred tank used in pharmaceutical industry
Collignon, Marie-Laure ULiege; Delafosse, Angélique ULiege; Delvigne, Frank ULiege et al

Poster (2012, September 10)

Stirred tanks are devices that are widely used in various process steps of the pharmaceutical industry. The performance of these processes (animal cell culture, crystallization, flocculation …) strongly ... [more ▼]

Stirred tanks are devices that are widely used in various process steps of the pharmaceutical industry. The performance of these processes (animal cell culture, crystallization, flocculation …) strongly depend on the physico-chemical and hydrodynamic environment present locally in these tanks. To fully describe this local environment, an Eulerian - Lagrangian approach must be adopted in order to establish history of conditions met by a particle as a cell, a crystal or a floc. This approach implies to determine the trajectory followed by the particle. To this aim, the Chemical Laboratory of Liege University has developed a prototype of optical trajectography device. The objective of this paper is to present the device, developments that were necessary for its use and the results obtained. The device is composed of two cameras modeled by a pinhole model which record the position of a bead that has a size equal to 490 µm and that perfectly follows local flow structures. The measured trajectory has been validated by comparing average time velocity fields deduced from it to those measured, in the same operating conditions, by particle image velocimetry (P.I.V.). [less ▲]

Detailed reference viewed: 55 (14 ULiège)
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See detailDevelopment of organic farming in Wallonia
Burny, Philippe ULiege; Debode, Frédéric

in Bran, Florina; Ioan, Ildiko; Maruntelu, Tudor-George (Eds.) et al 5th International Conference "Ecological performance in a competitive economy", Bucharest 7-8 March 2013 : proceedings (2013)

Belgium is a highly densely populated country where agricultural methods usually consume large quantities of inputs, including pesticides and chemical fertilizers. However, organic farming is practiced ... [more ▼]

Belgium is a highly densely populated country where agricultural methods usually consume large quantities of inputs, including pesticides and chemical fertilizers. However, organic farming is practiced since many years and has registered a significant development during the last years, reaching 7% of the number of farmers in Wallonia (South of Belgium) and 7% of the Walloon agricultural area. Presently, the Walloon Minister for Agriculture strongly supports this sector and has proposed a strategic development plan of organic farming, the target being to reach 14% of the Walloon agricultural area in 2020. This paper presents and discusses the situation of organic farming in Wallonia and the main features and challenges of the new strategic development plan. [less ▲]

Detailed reference viewed: 82 (11 ULiège)
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See detailDevelopment of organic farming in Wallonia : past, present and perspectives
Burny, Philippe ULiege; Debode, Frédéric

in Lorencowicz, Edmund; Uziak, Jacek; Huyghebaert, Bruno (Eds.) VI International Scientific Symposium "Farm Machinery and Processes Management in Sustainable Agriculture" : Symposium Proceedings (2013)

Organic farming is today fully recognized as an alternative to conventional agriculture and its problems (water and air pollution, large use of pesticides and possible impacts on human health, vegetal and ... [more ▼]

Organic farming is today fully recognized as an alternative to conventional agriculture and its problems (water and air pollution, large use of pesticides and possible impacts on human health, vegetal and animal diseases, overproduction, ..) and is clearly supported by the Common Agricultural Policy and its "greening". Belgian (and Walloon) agriculture is an intensive one, with a high "labour force/agricultural area" ratio and high yields thanks to good soils, but also the use of large quantities of inputs like fertilizers and pesticides. However, organic farming increased in importance during the last years and th Walloon regional government has just launched a development plan in June 2013. So, this paper aims to analyse the evolution of organic farming in Wallonia and to present the goals and the measures of the new development plan. [less ▲]

Detailed reference viewed: 39 (6 ULiège)
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See detailDevelopment of original 2-aryloxy/arylamino-5-cyanobenzenesulfonylureas as thromboxane A2 receptor antagonists
Bambi Nyanguile, Sylvie-Mireille ULiege; Hanson, Julien ULiege; Dogné, Jean-Michel et al

Poster (2012, August)

A series of novel 2-aryloxy/arylamino-5-cyanobenzenesulfonylureas were synthesized. The newly synthesized compounds were tested in vitro and ex vivo as thromboxane A2 receptor antagonists. Some of the ... [more ▼]

A series of novel 2-aryloxy/arylamino-5-cyanobenzenesulfonylureas were synthesized. The newly synthesized compounds were tested in vitro and ex vivo as thromboxane A2 receptor antagonists. Some of the test compounds showed potent thromboxane A2 receptor antagonist activity. Three compounds (7h, 8h and 8e) were identified as leads for further pharmacological and toxicological studies. [less ▲]

Detailed reference viewed: 50 (2 ULiège)
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See detailDevelopment of original pyridinic analogues of nimesulide as cycloxygenase inhibitors
Renard, Jean-François ULiege; de Leval, Xavier; Pirotte, Bernard ULiege

Conference (2007, October)

Detailed reference viewed: 11 (1 ULiège)
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See detailDevelopment of paleoseismic trench logging and dating techniques: a case study on the Central North Anatolian Fault
Fraser, Jeff; Pigati, J.S.; Hubert, Aurelia ULiege et al

in Geophysical Research Abstracts (2007, April), 9

Detailed reference viewed: 19 (0 ULiège)