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See detailL'exraction par micro-ondes: un choix de qualité
Ramdani, M.; Ghazi, Z.; Fadel, O. et al

Poster (2010)

Le but de ce travail est de comparer l’extraction faite par chauffage classique (CC) avec celle réalisée sous micro-ondes (MO). Deux modes d’extraction ont été réalisés : - L’hydro-distillation par ... [more ▼]

Le but de ce travail est de comparer l’extraction faite par chauffage classique (CC) avec celle réalisée sous micro-ondes (MO). Deux modes d’extraction ont été réalisés : - L’hydro-distillation par chauffage classique (extraction par entraînement à la vapeur d’un solvant) et, - L’hydro-distillation activée par micro-ondes. Les MO permettent un gain de temps considérable. Par exemple, dans le cas du lavandula dentata : on note une cinétique 3 fois plus rapide, de plus le rendement est nettement supérieur (1% contre 0,6% par chauffage classique). Dans le cas de la plante fraiche, l’extraction est faite en absence de solvant sous MO. Ceci présente un grand intérêt sur le plan économique et environnemental. De plus, la qualité de l’huile extraite présente généralement une meilleure pureté. L’extraction par MO constitue une technique en accord avec la chimie verte. Grâce à ce procédé, on pourra alors réduire d'environ 60 % les besoins en énergie, ce qui diminuera d'autant les émissions de gaz à effet de serre. [less ▲]

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See detailCyclodimerization by ring-closing metathesis: synthesis, computational and biological evaluation of novel bis-azetidinyl-macrocycles
Sliwa, Aline; Dive, Georges ULg; Habib Jiwan, Jean-Louis et al

in Tetrahedron (2010), 66

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See detailReview of three Recent Books on the Boundary of Bioinformatics and Systems Biology
Bullinger, Eric ULg; Schliemann, Monica ULg

in BioMedical Engineering OnLine (2010), 9(1), 33

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See detailStochastic analysis of a stadium roof from deterministic wind tunnel measurements
Blaise, Nicolas ULg; Denoël, Vincent ULg

in 13th International Conference on Wind Engineering (2010)

Dynamic analyses of structures under buffeting wind loads can be performed in a deterministic (Clough and Penzien, 1997) or stochastic (Preumont, 1994) context, both with a modal approach for ... [more ▼]

Dynamic analyses of structures under buffeting wind loads can be performed in a deterministic (Clough and Penzien, 1997) or stochastic (Preumont, 1994) context, both with a modal approach for computational efficiency reasons. In the first option, the forces are deterministically given, and the uncoupled modal equations of motion are solved either in the time domain with a stepby- step method, either in the frequency domain, with Fourier transformation. In the second option, the analysis relies on the determination of the Power Spectral Density (PSD) matrix of the structural response given that of the loading. The choice of one or another method usually depends on whether the loading is provided in the time or frequency domain and as a deterministic (a single time history) or stochastic manner. From a designer’s point of view, the wind loading can be defined using design codes (e.g. Eurocode, 2005) where analytical expressions of (i) the PSD of wind velocities (Davenport, Von Karman, etc) (ii) the coherence functions and (iii) the pressure coefficients are given to compute, finally, (iv) the PSD of the aerodynamic pressures. Design engineers are usually familiar with this probabilistic approach. Alternatively, the design may be conducted from aerodynamic pressures measured in a wind tunnel. This approach is more realistic than the aforementioned codified procedure since a number of phenomena as (a) the aerodynamic instabilities, (b) aerodynamic admittance (Scanlan and Jones, 1999), (c) site effects are taken into account. Pressures are thus given as unique (deterministic) time histories at each sensor. In a Finite Element context and a modal analysis, the generalized forces are computed from the measured pressures. With the firm wish to perform the analysis in a stochastic manner (for a number of good reasons mentioned next), we suggest to fit a probabilistic model to the measured data. Such a model could be fitted to the measured pressures right away, or any other subsequent quantity such as the generalized forces. The following discussion is about the most favorable quantity that has to be fitted and how to do it appropriately in view of typical measurement imperfections. [less ▲]

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See detailShort communication: Genetic relationship between calving traits and body condition score before and after calving in Canadian Ayrshire second-parity cows.
Bastin, Catherine ULg; Loker, Sarah; Gengler, Nicolas ULg et al

in Journal of Dairy Science (2010), 93(9), 4398-403

The objective of this study was to investigate the genetic relationship between body condition score (BCS) and calving traits (including calving ease and calf survival) for Ayrshire second-parity cows in ... [more ▼]

The objective of this study was to investigate the genetic relationship between body condition score (BCS) and calving traits (including calving ease and calf survival) for Ayrshire second-parity cows in Canada. The use of random regression models allowed assessment of the change of genetic correlation from 100 d before calving to 335 d after calving. Therefore, the influence of BCS in the dry period on subsequent calving could be studied. Body condition scores were collected by field staff several times over the lactation in 101 herds from Quebec and calving records were extracted from the official database used for Canadian genetic evaluation of calving ease. Daily heritability of BCS increased from 0.07 on d 100 before calving to 0.25 at 335 d in milk. Genetic correlations between BCS at different stages ranged between 0.59 and 0.99 and indicated that genetic components for BCS did not change much over lactation. With the exception of the genetic correlation between BCS and direct calving ease, which was low and negative, genetic correlations between BCS and calving traits were positive and moderate to high. Correlations were the highest before calving and decreased toward the end of the ensuing lactation. The correlation between BCS 10 d before calving and maternal calving ease was 0.32 and emphasized the relationship between fat cows before calving with dystocia. Standards errors of the genetic correlations estimates were low. Genetic correlations between BCS and calf survival were moderate to high and favorable. This indicates that cows with a genetically high BCS across lactation would have a greater chance of producing a calf that survived (maternal calf survival) and that they would transmit genes that allow the calf to survive (direct calf survival). [less ▲]

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See detailMembrane type 1 matrix metalloproteinase detection in tumors, using the iodinated endogenous [123I]-tissue inhibitor 2 of metalloproteinases as imaging agent.
Van Steenkiste, Magali; Oltenfreiter, Ruth; Frankenne, Francis et al

in Cancer Biotherapy & Radiopharmaceuticals (2010), 25(5), 511-20

Matrix metalloproteinases (MMPs) are principal participants in tumor development. In addition to serve as a useful biochemical marker, MMP expression may also provide a target for the diagnostic in vivo ... [more ▼]

Matrix metalloproteinases (MMPs) are principal participants in tumor development. In addition to serve as a useful biochemical marker, MMP expression may also provide a target for the diagnostic in vivo imaging of tumors, using a radiolabeled inhibitor. This study investigates the use of membrane type 1 (MT1)-MMP as target for in vivo tumor diagnosis. Specific binding of the endogenous tissue inhibitor of metalloproteinase-2 (TIMP-2) to MT1-MMP has been previously described. In this study, biodistribution and imaging experiments were performed on MT1-MMP-overexpressing (S.1.5) and control (C.IV.3) tumor-inoculated mice using [(123)I]-recombinant human TIMP-2 (rhTIMP-2) as radioligand and [(123)I]-rhTIMP-1 as control. The expression profile was controlled in vitro and on tumor extracts. rhTIMP-2 as well as rhTIMP-1 were labeled using the Iodogen method and characterized. Biodistribution of [(123)I]-rhTIMP-2 showed a tumor uptake of 2.87% +/- 1.58% ID/g at 3 hours postinjection in S.1.5. Tumor values of [(123)I]-rhTIMP-1 and [(123)I]-rhTIMP-2 evaluated in S.1.5 and C.IV.3, respectively, were significantly lower. Planar imaging revealed significant uptake of [(123)I]-rhTIMP-2 in S.1.5 compared with contralateral background areas. This could not be observed in C.IV.3 and with [(123)I]-rhTIMP-1 in S.1.5. All tumors were well established (200-800 mg). These results suggest that rhTIMP-2 holds potential for development of radiotracers for in vivo imaging in overexpressing MT1-MMP but not in similar tumors that do not express this protease. [less ▲]

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See detailDe internationalisering van de Vlaamse strip
Meesters, Gert ULg

in Praagse Perspectieven (2010), 6

De traditionele Vlaamse strip is ongewoon populair in de eigen regio, maar heeft — op Suske en Wiske en enkele andere uitzonderingen na — in het buitenland nooit een grote bekendheid verkregen. Sinds ... [more ▼]

De traditionele Vlaamse strip is ongewoon populair in de eigen regio, maar heeft — op Suske en Wiske en enkele andere uitzonderingen na — in het buitenland nooit een grote bekendheid verkregen. Sinds enkele jaren is het Vlaamse striplandschap echter grondig aan het veranderen. Jonge auteurs zetten een heel ander soort strips op de kaart en krijgen daarvoor zowel in eigen regio als ver daarbuiten erkenning. In deze lezing zal ik die nieuwe beweging in zijn context plaatsen en enkele boeken gedetailleerder bespreken, zoals De maagd en de neger van Judith Vanistendael en Over naar jou van Philip Paquet en Adriaan Van Aken. [less ▲]

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See detailTove Jansson's Dreamworld
Meesters, Gert ULg

in International Journal of Comic Art [=IJOCA] (2010), 12(2-3), 648-649

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See detailNotariat et courtage immobilier. Soleil à l'horizon
Kohl, Benoît ULg

in Journal des Tribunaux (2010)

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See detailDetermination of a Suitable Protocol for Indigenous Oilseed Cucurbits Plant Regeneration
Gnamien, Yah Gwladys; Zoro Bi, I. A.; Djè, Y. et al

in Tropicultura (2010), 28(4), 217-225

The present work was carried out to establish rapid in vitro propagation of the indigenous oilseed Citrullus lanatus. Efficiency of 3 protocols for seed decontamination was investigated. High level of ... [more ▼]

The present work was carried out to establish rapid in vitro propagation of the indigenous oilseed Citrullus lanatus. Efficiency of 3 protocols for seed decontamination was investigated. High level of seed sterilization was obtained after removing seed coat and soaking the seeds in 1.6 % sodium hypochlorite with a drop of Tween 20. Shoot tips, single node and cotyledon explants of 3 morphotypes have been screened for adventitious shoot formation in tissue culture. Best response in termis of multiple shoot induction was obtained from cotyledon proximal part with hypocotyl segmenet on Murashige and Skoog medium supplemented with 1 mg/l 6-Benzylaminopurine, 30 g/l sucrose and 8 g/l agar. After 3 weeks of culture, 90% of cotyledon proximal parts induced shoot. An average of 12.6 shoots per explants and a mean shoot length of 8 mm were obtained after multiplication stage. Shoot induction appeared to be strongly influenced by genotype and explant type. The percentage of shoot induction from cotyledon proximal parts ranged from 23.3% to 64.0% according to the genotype. Efficient rooting was achieved on half-solid MS medium containing 0.1 mg/l 1-Naphthaleneactic acid or without growth regulator. Acclimatised plantlets were transferred to greenhouse where they grew and flowered like seeded plantlets. [less ▲]

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See detailDistribution of EFHC1 or myoclonin 1 in mouse neural structures
Leon, Christine ULg; de Nijs, Laurence ULg; Chanas, Grazyna et al

in Epilepsy Research (2010), 88

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See detailLa fonction rénale
Cavalier, Etienne ULg

Learning material (2010)

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See detailWhat do we know about effects of desert dust on air quality and human health in West Africa compared to other regions?
De Longueville, Florence ULg; Hountondji, Yvon ULg; Henry, Sabine et al

in Science of the Total Environment (2010), 409(1), 1-8

This study aims to compare, on the one hand, the geographical distribution of the desert dust source areas, their contribution to quantities emitted into the atmosphere, the trajectories and the ... [more ▼]

This study aims to compare, on the one hand, the geographical distribution of the desert dust source areas, their contribution to quantities emitted into the atmosphere, the trajectories and the quantities deposited, with on the other hand the areas of research interest focused on the desert dust impacts on air quality and/or human health. Based on a systematic review of the literature using the ISI Web of Knowledge database, we found 231 articles published over the last decade on the desert dust impacts on air quality. Of these, 48% concerned Asian dust and 39% Saharan dust, with the remaining 13% divided between the other dust source areas. However, only one of these studies addressed the worsening air pollution in West Africa, even though it is very close to the Sahara, the greatest contributor to the global dust budget. Moreover, there have been very few studies (41) looking at the direct links between desert dust and human health; in this context too, no interest has been shown in West Africa. Yet this region is also among the areas in which morbidity rates have been noted to be far higher than those found in other regions of the world, and where respiratory infections alone account for more than 20% of the causes of infant mortality. This survey highlights a clear imbalance between those areas most exposed to dust and the most studied areas in terms of dust impacts. Given these findings and the often alarming results published about other regions of the world, we advocate a revival of interest in research on West Africa in order to achieve a better understanding of the desert dust impacts on air quality and health among the populations of this region. [less ▲]

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See detailIntroduction et analyse des organisations
Robert, Jocelyne ULg

Learning material (2010)

Plan de cours

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See detailAn analysis of the investment climate in agriculture in Hanoi Province, Vietnam
Tran Huu, Cuong; Bui, Thi Nga ULg

in Journal of ISSAAS (2010), 16(2), 26-38

Hanoi province, Vietnam has much potential for agricultural development with its large consumer market for agricultural products, soil and water resources, natural climate, physical and social ... [more ▼]

Hanoi province, Vietnam has much potential for agricultural development with its large consumer market for agricultural products, soil and water resources, natural climate, physical and social infrastructure. It is also one of provinces that has attracted a large number of investors. However, there are few agriculture investment projects in Hanoi in recent years. This paper presents the results of the structure interview of 200 managers of agricultural firms, co-operatives and farms in Hanoi province in 2008-2009. Even if these enterprises are pleased with their business performance and profitability, the investment climate could have negative effects obstructing investment incentives in agriculture. The study revealed eight key factors determining the investment climate in agriculture in Hanoi province, which include: land issue, provincial policies for agriculture, capital, physical infrastructure, administrative procedures, market, technology and labor issue. Land issues and provincial agricultural policies are the most important constraints; the second group are capital, physical infrastructure, governmental administration; and the third are market, technology and labor issues. [less ▲]

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See detailThe Analysis of Investment Climate in Agriculture in Hanoi province, Vietnam
Tran Huu, Cuong; Bui, Thi Nga ULg

in International Society for Southeast Asian Agricultural Sciences (Ed.) ISAAS 2009 International Congress "Agriculture for better living and global economy" (2010)

Hanoi province, Vietnam has much potential for agricultural development with its large consumer market for agricultural products, soil and water resources, natural climate, physical and social ... [more ▼]

Hanoi province, Vietnam has much potential for agricultural development with its large consumer market for agricultural products, soil and water resources, natural climate, physical and social infrastructure. It is also one of provinces that has attracted a large number of investors. However, there are few agriculture investment projects in Hanoi in recent years. This paper presents the results of the structure interview of 200 managers of agricultural firms, co-operatives and farms in Hanoi province in 2008-2009. Even if these enterprises are pleased with their business performance and profitability, the investment climate could have negative effects obstructing investment incentives in agriculture. The study revealed eight key factors determining the investment climate in agriculture in Hanoi province, which include: land issue, provincial policies for agriculture, capital, physical infrastructure, administrative procedures, market, technology and labor issue. Land issues and provincial agricultural policies are the most important constraints; the second group are capital, physical infrastructure, governmental administration; and the third are market, technology and labor issues. [less ▲]

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See detailRefining Sparse Principal Components
Journée, M.; Bach, Francis; Absil, P.-A. et al

in Diehl, M. (Ed.) Recent Advances in Optimization and its Applications in Engineering (2010)

In this paper, we discuss methods to refine locally optimal solutions of sparse PCA. Starting from a local solution obtained by existing algorithms, these methods take advantage of convex relaxations of ... [more ▼]

In this paper, we discuss methods to refine locally optimal solutions of sparse PCA. Starting from a local solution obtained by existing algorithms, these methods take advantage of convex relaxations of the sparse PCA problem to propose a refined solution that is still locally optimal but with a higher objective value. [less ▲]

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See detailOptimal Data Fitting on Lie Groups: a Coset Approach
Lageman, Christian; Sepulchre, Rodolphe ULg

in Diehl, M. (Ed.) Recent Advances in Optimization and its Applications in Engineering (2010)

This work considers the problem of fitting data on a Lie group by a coset of a compact subgroup. This problem can be seen as an extension of the problem of fitting affine subspaces in Rn to data which can ... [more ▼]

This work considers the problem of fitting data on a Lie group by a coset of a compact subgroup. This problem can be seen as an extension of the problem of fitting affine subspaces in Rn to data which can be solved using principal component analysis. We show how the fitting problem can be reduced for biinvariant distances to a generalized mean calculation on an homogeneous space. For biinvariant Riemannian distances we provide an algorithm based on the Karcher mean gradient algorithm. We illustrate our approach by some examples on SO(n). [less ▲]

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See detailRecommendations for transoesophageal echocardiography: update 2010.
Flachskampf, F. A.; Badano, L.; Daniel, W. G. et al

in European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology (2010), 11(7), 557-76

Transoesophageal echocardiography (TOE) is a standard and indispensable technique in clinical practice. The present recommendations represent an update and extension of the recommendations published in ... [more ▼]

Transoesophageal echocardiography (TOE) is a standard and indispensable technique in clinical practice. The present recommendations represent an update and extension of the recommendations published in 2001 by the Working Group on Echocardiography of the European Society of Cardiology. New developments covered include technical advances such as 3D transoesophageal echo as well as developing applications such as transoesophageal echo in aortic valve repair and in valvular interventions, as well as a full section on perioperative TOE. [less ▲]

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