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See detailDietary intake of PCDD/F and dioxin-like PCB for the Belgian population
Focant, Jean-François ULg; Windal, I.; Vandevijvere, S. et al

in Organohalogen Compounds (2010, September)

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See detailDosage de la 25-OH vitamine D: attention aux erreurs analytiques!
Cavalier, Etienne ULg; Carlisi, Ignazia ULg; Delanaye, Pierre ULg et al

in 27ème Congrès de la Société Française d'Endocrinologie - Deauville, 29 septembre - 2 octobre 2010 (2010, September)

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See detailAn Automata-Based Symbolic Approach for Verifying Programs on Relaxed Memory Models
Linden, Alexander ULg; Wolper, Pierre ULg

in Lecture Notes in Computer Science (2010, September)

This paper addresses the problem of verifying programs for the relaxed memory models implemented in modern processors. Specifically, it considers the TSO (Total Store Order) relaxation, which corresponds ... [more ▼]

This paper addresses the problem of verifying programs for the relaxed memory models implemented in modern processors. Specifically, it considers the TSO (Total Store Order) relaxation, which corresponds to the use of store buffers. The proposed approach proceeds by using finite automata to symbolically represent the possible contents of the store buffers. Store, load and commit operations then correspond to operations on these finite automata. The advantage of this approach is that it operates on (potentially infinite) sets of buffer contents, rather than on individual buffer configurations. This provides a way to tame the explosion of the number of possible buffer configurations, while preserving the full generality of the analysis. It is thus possible to check even designs that exploit the relaxed memory model in unusual ways. An experimental implementation has been used to validate the feasibility of the approach. [less ▲]

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See detailAnti-inflammatory potency of the traditionally used antimalarial plant Fagraea fragrans
Jonville, Marie ULg; Baghdikian, Béatrice; Ollivier, Evelyne et al

in Planta Medica (2010, September), 76(12), 1171

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See detailAntioxidant activity of Passiflora edulis and Passiflora alata fruits
Yariwake, J.; Zeraik, M.; Serteyn, Didier ULg et al

in Planta Medica (2010, September), 76(12), 1274-1275

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See detailBioassay-guided isolation of antiplasmodial Strychnos alkaloids from the stem-bark of Strychnos icaja BAILLON
Tchinda Tiabou, Alembert ULg; Tamze, Victorine; Frederich, Michel ULg et al

in Planta Medica (2010, September), 76(12), 1305

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See detailA Taxonomy of Distinctive Explanatory Business Failure Patterns amongst Small Firms : A Qualitative Approach
Crutzen, Nathalie ULg; Van Caillie, Didier ULg

in Cahier de Recherche du CEPE (2010, September)

Whereas it is obvious that the failure process can vary from one firm to another (Argenti, 1976; D'Aveni, 1989; Laitinen, 1991), to date, few researchers have worked on the detection of several ... [more ▼]

Whereas it is obvious that the failure process can vary from one firm to another (Argenti, 1976; D'Aveni, 1989; Laitinen, 1991), to date, few researchers have worked on the detection of several (explanatory or subsequent) failure patterns. In addition, none of the reviewed research really focuses on small firms while their failure is important and particular (Haswell and Holmes, 1989). Considering these observation and on the basis of an abductive and qualitative analysis (Thiétart, 2003), this paper identifies, among a sample of 208 small distressed firms, a taxonomy of five explanatory business failure patterns, i.e. five homogenous groups of small firms on the basis of the reasons for their failure. As the detection of the fundamental explanatory failure factors is the basis of failure prevention (Argenti, 1976), the identification of these patterns is of crucial importance for a better understanding and for a better prevention of this phenomenon amongst small businesses. [less ▲]

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See detailRelevance of the resident diary method to map odour sources.
Nicolas, Jacques ULg; Cors, Marie; Delva, Julien et al

in Chemical Engineering Transactions (2010, September), 23

A methodology based on the social participation through the use of resident diaries was applied to evaluate the odour annoyance in the surroundings of an industrial park in Belgium during one year. The ... [more ▼]

A methodology based on the social participation through the use of resident diaries was applied to evaluate the odour annoyance in the surroundings of an industrial park in Belgium during one year. The studied area covers about 8 km2 and includes13 potential odour emitting facilities. A network of 44 residents was implied in the survey, from which 19 were particularly considered for a detailed analysis. The questionnaire aimed at providing twice-daily an odour strength rating on a 6-level scale together with an odour qualifier. The fact that the response rate corresponding to "no-odour" was high (79%) is particularly discussed. Some tests are proposed to check the plausibility of the responses, the consistency within clusters of residents and the individual performance of respondents to discriminate among odour ratings. The odour rose is presented as an attractive and visual tool, particularly suited in the case of multi-source areas, to map the different odour emissions, to point out the more worrying ones, some others creating less annoyance and possible new unpredicted ones. The resident diary method proves to be very interesting, especially in the case of an industrial area, provided that validation checks are performed to insure the data reliability. [less ▲]

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See detailMechanical comparison of eight vertical jump exercises
Jidovtseff, Boris ULg; Cronin, John; Harris, Nigel et al

in Computer Methods in Biomechanics & Biomedical Engineering (2010, September), 13(S1), 77-78

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See detailPLE for extraction of dioxins in animal feed and ingredients
Focant, Jean-François ULg; Scholl, Georges ULg; De Pauw, Edwin ULg et al

in Organohalogen Compounds (2010, September), 72

Within the entire complex procedure required to measure dioxins and related compounds in biological matrices, the extraction step is often seen as a well controlled step. Although maybe true for many ... [more ▼]

Within the entire complex procedure required to measure dioxins and related compounds in biological matrices, the extraction step is often seen as a well controlled step. Although maybe true for many human and food-related matrices, the situation is very different for animal feed and feed ingredients. Specific European guidelines (e.g. Commission Directive 2006/13/EC, Commission Regulation (EC) No 152/2009) exist for animal feed but only list general requirements for the various stages of the procedure. The liberty is left to laboratories to select, for example, the tools used for the extraction steps. This has the advantage to allow ‘in-house’ methods to be used, as long as they satisfy with all the requirements of the EU Regulation. In that context, it is foreseen that the European Committee for Standardization (CEN) will soon propose a standard for the determination of PCDD/Fs and PCBs in animal feed that would be the reference method to be used to solve potential issues in case of dispute over results reported from different laboratories. A major point of concern is that it has been reported earlier1 that most commonly accepted extraction procedure can conduct to significantly different results for the extraction of dioxins and related compounds in feed and feed additives such as mineral clays and various oxides. Several non-instrumental and instrumental automated approaches are available for extraction. Soxhlet extractors have long been the most used tools for non-instrumental extraction of solids. They have proven to be very efficient but some limitations encouraged the development of other approaches based on instrumental techniques. For feed extraction, pressurized liquid extraction (PLE) (also branded as accelerated solvent extraction ASE®) is the technique of choice for high sample throughput. This study reports on the investigation of the use of various solvent mixtures, extraction temperatures, and instruments (parallel PLE, sequential ASE®) for the extraction of 17 PCDD/Fs and 12 dioxin-like PCBs in mineral clay, bovine feed, fish meal, and in-house quality control animal compound feed. [less ▲]

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See detailFault detection in mechanical systems based on subspace features
Nguyen, Viet Ha ULg; Rutten, Christophe ULg; Golinval, Jean-Claude ULg

in International Conference on Noise and Vibration Engineering (2010, September)

In the field of structural health monitoring or machine condition monitoring, the activation of nonlinear dynamic behavior complicates the procedure of damage or fault detection. Principal Component ... [more ▼]

In the field of structural health monitoring or machine condition monitoring, the activation of nonlinear dynamic behavior complicates the procedure of damage or fault detection. Principal Component Analysis (PCA) is known as an efficient method for damage diagnosis. However, two drawbacks of PCA are the assumption of the linearity of the system and the need of many sensors. This article presents industrial applications of two possible extensions of PCA: Null subspace analysis (NSA) and Kernel PCA (KPCA). The advantages of NSA rely on its rapidity of use and its reliability. The KPCA method, through the use of nonlinear kernel functions, allows to introduce nonlinear dependences between variables. The objective is to address the problem of fault detection in mechanical systems using subspace-based methods. The detection is achieved by comparing the subspace features between the reference and a current state through statistics. Industrial data are used as illustration of the methods. [less ▲]

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See detailSCREENIN G AND PREDICTING MALNUTRITION IN lUNG CANCER PATIENTS: DEVELOPING NEW TOOLS.
BARTHELEMY, Nicole ULg; Donneau, Anne-Françoise ULg; Haterte, Stéphanie ULg et al

in Radiotherapy & Oncology (2010, September), 96(supp 1), 378

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See detailEtude de la séquence hyperplasie-adénome dans la tumorigenèse de l'hypophyse : rôle des mutations du gène
Villa, C.; Lagonigro, M.; Magri, F. et al

in Annales d'Endocrinologie (2010, September), 71(5), 411

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See detailCaractéristiques des prolactinomes résistants aux agonistes dopaminergiques
Vroonen, Laurent ULg; Tamagno, G.; Naves, L. et al

in Annales d'Endocrinologie (2010, September), 71(5), 347

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See detailEtude génétique et anatomopathologique du syndrome de McCune-Albright chez l'adulte
Beckers, Albert ULg; Burlacu, Maria Cristina ULg; Thiry, Albert ULg et al

in Annales d'Endocrinologie (2010, September), 71(5), 345

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See detailUn nouveau marqueur tumoral pour le carcinome parathyroïdien? Résultats observés chez 24 patients
Cavalier, Etienne ULg; Daly, Adrian ULg; Betea, Daniela ULg et al

in Annales d'Endocrinologie (2010, September), 71(5), 350-351

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See detailLes anticorps hétérophiles : une cause souvent méconnue d'erreurs de diagnostic
Cavalier, Etienne ULg; Carlisi, A.; Delanaye, Pierre ULg et al

in Annales d'Endocrinologie (2010, September), 71(5), 367-68

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See detailConclusions générales sur la journée d'étude consacrée au contrôle juridictionnel de la passation des marchés publics
Durviaux, Ann-Lawrence ULg

in Entreprise et le Droit (L') = Tijdschrift voor Aannemingsrecht (2010, September)

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See detailRésistance au traitement par GnRH agonistes dans le cancer de la prostate métastatique
Valdes Socin, Hernan Gonzalo ULg; Waltregny, David ULg; Beckers, Albert ULg

in Annales d'Endocrinologie (2010, September), 71(5), 396

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See detailDosage de la vitamine D : attention aux erreurs analytiques!
Cavalier, Etienne ULg; Carlisi, A.; Delanaye, Pierre ULg et al

in Annales d'Endocrinologie (2010, September), 71(5), 368

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See detailHypogonadisme congénital chez un homme, associé à une LK immunoréactive normale, élévation de FSH et azoospermie
Valdes Socin, Hernan Gonzalo ULg; Chachati, Anne-Sophie ULg; De Roux, N. et al

in Annales d'Endocrinologie (2010, September), 71(5), 355

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See detailDioxin levels in European eels, a Belgian study
Focant, Jean-François ULg; Geeraerts, C.; Eppe, Gauthier ULg et al

in Organohalogen Compounds (2010, September)

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See detailDeux nouvelles mutations dans le gène du récepteur du calcium (CASR) entraînant respectivement une hypo- et une hypercalcémie
Thonnard, Anne-Sophie ULg; Livadariu, Elena ULg; Rydlewski, C. et al

in Annales d'Endocrinologie (2010, September), 71(5), 367

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See detailMutations AIP chez les jeunes patients en dessous de 30 ans avec adénome hypophysaire agressif
Beckers, Albert ULg; Tichomirowa, M.; Barlier, A. et al

in Annales d'Endocrinologie (2010, September), 71(5), 397

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See detailPrévalence et incidence d'épilepsie chez 270 patients avec un traumatisme crânien (TBI) et traités par GH, suivis dans KIMS
Valdes Socin, Hernan Gonzalo ULg; Mattsson, A.; Koltowska-Haggstrom, M. et al

in Annales d'Endocrinologie (2010, September), 71(5), 396

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See detailLC-SPE-NMR-MS analysis of Strychnos usambarensis fruits from Rwanda
Cao, Martine ULg; Tits, Monique ULg; Muganga, Raymond et al

in Planta Medica (2010, September), 76(12), 1241-1242

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See detailComparaison d'une méthode "acide" et enzymatique pour le dosage de l'inuline
Thibaudin, L.; Delanaye, Pierre ULg; Maillard, N. et al

in Néphrologie & Thérapeutique (2010, September), 6(5), 316

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See detailLe dosage urinaire et plasmatique du NGAL: étude analytique et implications pratiques pour le clinicien
Cavalier, Etienne ULg; Rozet, Eric ULg; Bekaert, Anne-Catherine ULg et al

in Néphrologie & Thérapeutique (2010, September), 6(5), 350

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See detailLes cibles thérapeutiques pour la PTH dans les nouvelles recommandations du KDIGO: la fin d'un cauchemar?
Cavalier, Etienne ULg; Jean, G.; Delanaye, Pierre ULg et al

in Néphrologie & Thérapeutique (2010, September), 6(5), 424

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See detailQuels paramètres cliniques et biologiques peuvent être considérés comme prédictifs des calcifications vasculaires chez le patient hémodialysé?
Delanaye, Pierre ULg; Warling, X.; Moonen, M. et al

in Néphrologie & Thérapeutique (2010, September), 6(5), 296

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See detailEvaluation analytique de la cystatine C: résultats de l'étude multicentrique SN/SFBC
Cavalier, Etienne ULg; Barguil, Y.; Bourgeois, A. M. et al

in Néphrologie & Thérapeutique (2010, September), 6(5), 314

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See detailCytological diagnosis of endometritis in the mare: a comparative study
Daspet, Sarah-Morgane; Ponthier, Jérôme ULg; Jolly, Sandra ULg et al

in Reproduction in Domestic Animals (2010, September), 45s3

It was concluded that the brush swab was a promising diagnostic tool for use in field conditions.

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See detailPlatelet-Rich Plasma injection to improve tendon healing process
Kaux, Jean-François ULg; Drion, Pierre ULg; Renouf, Julien et al

in Osteoarthritis and Cartilage (2010, September), 18(Supplement 2), 221

Introduction It is well known that injured tendons do not heal easily. For example, tendinopathy is a condition which often becomes chronic in the case of bad or late management. Recently, several studies ... [more ▼]

Introduction It is well known that injured tendons do not heal easily. For example, tendinopathy is a condition which often becomes chronic in the case of bad or late management. Recently, several studies, essentially in vitro and, more recently, a few in clinical practice, have demonstrated the positive effects of platelets on the healing process of different tissues. In fact, platelets contain lots of growth factors which can be released after a local injection. These growth factors have the potentiality to enhance the tendon healing process, for example after rupture or tendinopathy. The aim of our experiment was to ascertain whether the use of Platelet-Rich Plasma (PRP) was of interest for accelerating the healing process of Achilles tendon after surgical induced lesion. Methods All experimental procedures and protocols used in this investigation / were reviewed and approved by the Institutional Animal Care and Use Committee of the University of Liège. 60 rats were divided into 2 groups: A: control (no injection) and B: PRP injection. A 5mm defect was surgically induced in the rats’ Achilles tendon after resection of plantaris tendon. Rats of group B received a PRP injection in situ after the surgery. Afterwards, rats of both groups were placed in their cages without immobilization. After 5, 15 and 30 days, the traumatized Achilles tendons of 10 rats of both groups were removed and dissected during their healing process. Immediately after sampling, tendons were submitted to a biomechanical tensile test up to rupture, using a “Cryo-jaw”. Rats were then euthanized. Statistical analyses were made with an ANOVA. Values are significant when p-value is below 0.05. Results We observed that the force necessary to induce tendon rupture during biomechanical tensile testing increased with time in both groups; that this force was greater for tendons which had been submitted to an injection of PRP. The ratio between force and weight increased with time in both groups; that this ratio was greater for tendons which had been submitted to an injection of PRP too. There is also a significant interaction between time and the group. The surface area of the section of the tendons increased between 5 and 15 days followed by a stabilization. After 30 days, sections in both groups were similar. Thus, the constraint was similar after 5 and 15 days but is significantly better for PRP group after one month. Discussion – Conclusion We demonstrated that the force necessary to induce tendon rupture during biomechanical tensile testing was greater for tendons which had been submitted to an injection of PRP. These results were observed and significant (p<0.05) from day 5 onwards. We observed too that the section of the tendon was the same in both groups after 30 days. Thus the quality of the healing tendon is better with an injection of PRP, as shown with the increase of the constraint until rupture. Acknowledgement This experimentation was partially financed by “Standard de Liège 2007” and “Lejeune-Lechien 2008” grants. [less ▲]

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See detailVEGF-111 as a new therapeutic tool for tendon lesion
Kaux, Jean-François ULg; Drion, Pierre ULg; Libertiaux, Vincent ULg et al

in Osteoarthritis and Cartilage (2010, September), 18(Supplement 2), 22

Introduction: Tendon lesion is one of the most frequent pathology in sports and by physical workers. This pathology often becomes chronic. For this reason, it is of interest to develop new treatments ... [more ▼]

Introduction: Tendon lesion is one of the most frequent pathology in sports and by physical workers. This pathology often becomes chronic. For this reason, it is of interest to develop new treatments. Injection of platelet-rich plasma (PRP) seems to be a promising one by releasing growth factors (GF) locally. Among all the GF released by activated platelets, the vascular endothelial growth factor-A (VEGF-A) is known to induce positive effects on vascular function and angiogenesis, and could be implicated in the healing process of tendons. Recently, a novel VEGF-A isoform was identified, the VEGF-111, a biologically active and proteolysis-resistant VEGF-A isoform, also known to present beneficial effects on ischemic diseases. This prompted us to evaluate whether VEFF-111 would have a therapeutic interest within the framework of the tendon pathology. Methods: 60 Rats were divided into 2 groups: A: control (no injection), B: VEGF-111 treatment. A 5mm defect was surgically induced in rat Achilles tendon after resection of plantaris tendon. Rats received a local injection of VEGF-111 (100ng) in situ after the surgery and were placed in their cages without immobilization. After 5, 15 and 30 days, the traumatized Achilles tendons of 10 rats of both groups were removed and dissected during their healing process. Immediately after sampling, tendons were submitted to a biomechanical tensile test up to rupture, using a “Cryo-jaw”. Rats were then euthanized. Statistical analyses were made with an ANOVA. Values are significant when p-value is below 0.05. Results: Our results shown that the developed force necessary to induce tendon rupture during biomechanical tensile test was greater for tendons which had received an injection of 100ng of VEGF-111. These results were already noticed from day 5 onwards. The ratio between force and weight increased with time in both groups, but this ratio was greater for tendons which had been submitted to an injection of VEGF111. The surface area of the section of the tendons increased between 5 and 15 days followed by a stabilization. After 30 days, sections in both groups were similar. Thus, the constraint was similar after 5 and 15 days but was better for VEGF111 group after one month. Discussion - Conclusion: This experimentation has shown that a 100ng injection of VEGF-111 stimulated tendon healing process as suggested by the increased force needed to break tendons during its healing process and the increased of constraint in comparison with the control group. Other experimentations with different concentration of VEGF111 are now in process. Acknowledgement This experimentation was partially financed by “Standard de Liège 2007” and “Lejeune-Lechien 2008” grants. [less ▲]

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See detailEtude échocardiographique longitudinale chez des patients atteints de prolactinome et traités par cabergoline
Lancellotti, Patrizio ULg; Latta, K.; O'Connor, Kim ULg et al

in Annales d'Endocrinologie (2010, September), 71(5), 399

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See detailCaractérisation des facteurs associés à la perte d'expression de AIP dans les adénomes hypophysaires somatotropes
Jaffrain-Rea, M. L.; Angelini, M.; Tichomirowa, M. et al

in Annales d'Endocrinologie (2010, September), 71(5), 406

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See detailRecherche de la mutation du gène CDKN1B dans les adénomes hypophysaires familiaux isolés (FIPA): analyse de 86 familles
Beckers, Albert ULg; Tichomirowa, M.; Pellegata, N. et al

in Annales d'Endocrinologie (2010, September), 71(5), 398

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See detailExclusive diffractive Higgs and jet production at the LHC
Royon, Christophe; Staszewski, Rafal; Dechambre, Alice ULg et al

in PoS - Proceedings of Science (2010, August 02), PoS DIS2010(PoS DIS2010), 087

The implementation of exclusive diffractive production of Higgs boson and dijets in the FPMC (Forward Physics Monte Carlo) framework is presented following the models by Khoze, Martin, Ryskin and Cudell ... [more ▼]

The implementation of exclusive diffractive production of Higgs boson and dijets in the FPMC (Forward Physics Monte Carlo) framework is presented following the models by Khoze, Martin, Ryskin and Cudell, Dechambre, Hernandez and Ivanov. The predictions of the models are compared to the CDF measurement of exclusive jets and the uncertainties on the Higgs boson and jet production cross sections at the LHC are discussed. [less ▲]

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See detailAcceleration and gravity power: A concept for understanding total power output
Quievre, Jacques; Cronin, John; Harris, Nigel et al

in Computer Methods in Biomechanics & Biomedical Engineering (2010, August), 13(S1), 113-114

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See detailMorphology of the digital sheath in horses
Strzalkowski, A; Espinosa, J; Jacqmot, O et al

in Anatomia, Histologia, Embryologia (2010, August), 39(4), 288

Introduction: The digital sheath is located in the palmar (plantar) face of the distal limb. It consists of a synovium, divided into intimate and vascularised supportive layers, and ligaments that ... [more ▼]

Introduction: The digital sheath is located in the palmar (plantar) face of the distal limb. It consists of a synovium, divided into intimate and vascularised supportive layers, and ligaments that strengthen the tendon sheath in its palmar (plantar) face. The synovium surrounds the digital flexor tendons during their passage within the sheath. The synovium fluid, produced by the filtering of the blood and by the intima cells, allows lubrification within the sheath. Lameness, originating from digital sheath pathology is not rare, and it is important, for any equine practitioner, to know its normal morphology. The aim of this study is to precise the morphology of the digital sheath, particularly its synovium because the literature is not unanimous. Methods: The digitals tips of 7 "sound" horses were collected. Samples were taken within the 3 annular ligaments (Proximal, Digital Proximal, Digital Distal). The digital flexor tendons were sampled with the visceral sheath of the synovial membrane at the level of the proximal sesamoïd bones and just proximal to the medium scutum. All these samples were embedded in tissue-tek and freezed for cryosectioning. The proximal and distal recessus of the synovial membrane were also sampled, fixed in formalin and embedded in paraffin. Sections were stained with haematoxylin/eosin. One sample of the synovial membrane was taken for electronic microscopy and embedded in? Results: Annular ligaments are composed of dense connective tissue but are transversal strengthening of the fascia rather than true ligaments. The digital flexor tendons showed the typical organisation of the collagen network. Type III fibrocytes were observed within the deep digital flexor tendon. The synovial membrane showed two layers: an intima (with visceral and parietal sheath) with fibroblast-like cells and macrophagic cells, and a sub-intima composed of fibrous tissue that was sometime so thickened that it was difficult to cut! The recessus contained large synovial fringe with adipose tissue. Conclusion: This study permitted to precise the morphology of the digital sheath in horse which may help to better understand the pathological changes. [less ▲]

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See detailUsing a Savart plate in optical metrology
Blain, Pascal ULg; Michel, Fabrice ULg; Renotte, Yvon ULg et al

in Proceedings of SPIE (2010, August), 7791

Non-contact optical measurement methods are essential tools in many industrial and research domains. A family of new non-contact optical measurement methods based on the polarization states splitting ... [more ▼]

Non-contact optical measurement methods are essential tools in many industrial and research domains. A family of new non-contact optical measurement methods based on the polarization states splitting technique and monochromatic light projection as a way to overcome ambient lighting for in-situ measurement has been developed1,2. Recent works3 on a birefringent element, a Savart plate, allow to build a more flexible and robust interferometer. This interferometer is a multipurpose metrological device. On one hand, the interferometer can be set in front of a CCD camera. This optical measurement system is called a shearography interferometer and allows to measure micro displacement between two states of the studied object under coherent lighting. On the other hand, by producing and shifting multiple sinusoidal Young’s interference patterns with this interferometer, and using a CCD camera, it is possible to build a 3D structured light profilometer. After giving the behavior of the Savart plate, an overview of the two devices will be given as well as their specifications and some applications. [less ▲]

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See detailThe relationship between fetlock joint dorsiflexion and flexor tendon moment arms variations
Noble, Prisca ULg; Collin, Bernard ULg; Denoix, Jean-Marie et al

in Anatomia, Histologia, Embryologia (2010, July 28), 39(4), 335-336

Introduction: To calculate flexor tendon forces on the basis of inverse dynamic analysis, flexor tendon moment arms need to be determinated in the equine distal forelimb. Moment arm of deep digital flexor ... [more ▼]

Introduction: To calculate flexor tendon forces on the basis of inverse dynamic analysis, flexor tendon moment arms need to be determinated in the equine distal forelimb. Moment arm of deep digital flexor tendon (dDDF) and of superficial digital flexor tendon (dSDF) have been recognised to vary during the fetlock joint dorsiflexion, however little distal forelimb model has taken into account dSDF and dDDF variations. This study describes a method to determinate the relationship between the fetlock joint dorsiflexion and the flexor moment arms variations. Methods: Eleven forelimbs of eleven horses (~500 Kg) were collected, transversally cut below the shoulder joint, frozen and cut into a sagittal plane until above the fetlock joint. Considering the forelimb pulley model (Meershoek et al. AJVR 2001; 62 1585-1593), in the segment based coordinate system, for the fetlock joint the pulley centers of the DDF and SDF tendons were determined directly from the section. For the fetlock radius-pulley experiments, forelimbs were thawed overnight, fixed to an immobilizing support and attached to a hoist that dorsiflexed the fetlock joint. For the fetlock dorsal angle (θ) 180° to 150°, the dDDF and the dSDF were measured directly from the section. For each tendon all of these data were fitted using a polynomial regression model (OriginPro8) and the relationships between θ and the radius pulley variation (∆d) was described assuming that ∆d was zero at θ equal to 180°. Results : When the fetlock dorsiflexion increased, dDDF and dSDF decreased (∆dDDF(150)= -6.1 mm; ∆dSDF(150)= -5.2 mm) according to the following equations: ∆dDDF(θ)= -0.24923 x θ1 + 0.00139 x θ² (R²=0.89867) ; ∆dSDF(θ)= -0.21494 x θ1 + 0.0012 x θ² (R²=0.91504). Conclusions : A distal forelimb pulley model with variable dDDF and dSDF has been performed. It could become an important tool for use in inverse dynamic procedures. [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 detailAssessment of high sensitive troponin T and I immunoassays in patients with acute chest
Le Goff, Caroline ULg; Garweg, Christophe ULg; Laurent, Terry et al

in Clinical Chemistry (2010, July), 56(S6), 127

Introduction: Cardiac troponin I and T are specific markers of myocardial injury that are widely used for the diagnosis of acute coronary syndrome (ACS). In acute chest pain without ST-segment elevation ... [more ▼]

Introduction: Cardiac troponin I and T are specific markers of myocardial injury that are widely used for the diagnosis of acute coronary syndrome (ACS). In acute chest pain without ST-segment elevation, they are used to differentiate unstable angina from non ST-segment elevation myocardial infarction (NSTEMI). Recently, troponin assays with higher analytical sensitivities became available to enable the detection of minor myocardial damage and identify individuals at higher risk for ACS. As a result of its high tissue-specificity, cardiac troponin T and I are cardio-specific, highly sensitive markers for myocardial damage. The aim of this study was to evaluate the new higher sensitive troponin (T and I) in patients with stable angina and acute chest pain without ST-segment elevation. Methods: Sixty subjects (mean age : 65.5± 11 years), were included: 20 healthy controls, 20 patients with stable angina, 9 with unstable angina (troponin-) and 18 patients with NSTEMI myocardial infarction (troponin+). The protocol was approved by the ethic committee of the University of Liège (Belgium). High sensitive troponin T (hsTnT) determination was realized on heparin plasma by electrochemiluminescence immunoassay on Modular E (Roche Diagnostic). Troponin I II (TnI II) is a chemiluminescent microparticle immunoassay for the quantitative determination of cardiac troponin-I in heparine plasma on the ARCHITECT i System (Abbott Diagnostic). The lower detection limit of these assays was 0.005μg/L for hsTnT and 0.01μg/L for TnI II. Stastistical analysis was performed using t test. P value <0.05 was considered significant. Results: HsTNT levels were 0.003(0.003, 0.004) [median baseline (1st, 3rd quartile)]ng/ml in controls, 0.0075 (0.00475, 0.014) ng/ml in stable angina, 0.011(0.006, 0.012) ng/ml in unstable angina and 0.3715 (0.1795, 1.00725) ng/ml in NSTEMI ACS. TnI II levels were 0 (0, 0.001) ng/ml in controls and in patients with stable angina, 0.07 (0.005, 0.014) ng/ml in unstable angina and 1.4475 (0.0407, 2.656) ng/ml in NSTEMI. HsTNT and TnI II levels were significantly increased in NSTEMI as compared to control subjects, patients with stable and unstable angina. TnI II levels were also increased in unstable angina as compared to controls. Conclusion: In our population, TnI II was more sensitive than hsTNT to detect minor myocardial damage in patients with unstable angina as compared to controls. Therefore, future studies will have to determine whether TnI II might contribute to better risk stratification and treatment strategy in this group of patients. [less ▲]

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See detail3D-reconstruction and overall topology of the dimeric mitochondrial ATP synthase of the colorless alga Polytomella sp
González-Halphen, Diego; Vázquez-Acevedo, Myriam; Cano-Estrada, Araceli et al

in Biochimica et Biophysica Acta (BBA) - Bioenergetics (2010, July), 1797(Supplement 1), 32

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See detailUse of clinical biology techniques in clinical practice: injections of platelet-rich plasma to heal tendon
Kaux, Jean-François ULg; Le Goff, Caroline ULg; Drion, Pierre ULg et al

in Clinical Chemistry (2010, July), 56(S6), 111

Introduction: A tendon is a tissue which does not heal easily. For example, tendinopathy is a condition which often becomes chronic in the case of bad or overdue management. Several studies, essentially ... [more ▼]

Introduction: A tendon is a tissue which does not heal easily. For example, tendinopathy is a condition which often becomes chronic in the case of bad or overdue management. Several studies, essentially in vitro and, more recently, a few in clinical practice, have demonstrated the positive effects of platelets on the healing process of tendons. A local injection of platelet–rich plasma (PRP), which releases many growth factors, has the potentiality to enhance the tendon healing process. The aim of our experiment was to ascertain whether the use of PRP could accelerate the healing process of an Achilles tendon after a surgically induced lesion. Methods (*): PRP was obtained from the blood of 12 Sprague Dawley rats by cardiac puncture under general anaesthesia until the heart stopped beating. Quantities of 1mL of anticoagulant, adenosine-citrate-dextrose-acid (ACD-A), were added immediately to each 4,5mL of blood. The blood was then centrifuged at 180g for 10 minutes. To improve platelet concentration of the PRP, the supernatant was centrifuged for a second time at 1000g for 10 minutes. The platelets were then collected using a gauge pipette. Cell and platelet counts were made by an auto-analyser. Platelet concentration was around 2.2 to 2.9 x106/mm³. A 5mm defect was surgically induced in the Achilles tendon of 60 rats. Rats were divided into 2 groups of 30: A: a control group (no injection) and B: with a PRP injection. The rats of group B received a PRP injection in situ 1 hour after the surgery on the site of the lesion of the Achilles tendon. Fifty micro-litres of PRP were injected in each rat of the PRP group. Platelets were activated by the local presence of collagen in the wound. Afterwards, the rats of both groups were placed in their cages without immobilization. After 5, 15 and 30 days, 10 rats of each group were euthanized. The traumatized Achilles tendon of each rat was dissected and removed. Immediately after sampling, tendons were submitted to a biomechanical tensile test up to rupture, using a tensile machine with a “Cryo-jaw”. Results: We demonstrated that the force necessary to induce tendon rupture during biomechanical tensile testing was greater for tendons which had been submitted to an injection of PRP. These results were observed and significant (p<0.05) from day 5 onwards. Discussion: This experimentation showed that PRP injections could accelerate the tendon healing process and increase the force needed to break tendons in their healing process. This “accelerating” process can be observed and is significant (p<0.05) as early as day 5. Conclusion: PRP, by the local release of growth factors, would be a new therapeutic tool to accelerate tendon healing. Acknowledgement: This experimentation was partially financed by “Standard de Liège” and “Lejeune-Lechien” grants. (*) All experimental procedures and protocols used in this investigation were reviewed and approved by the Institutional Animal Care and Use Committee of the University of Liège. [less ▲]

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See detailAssessment of stress level in horses during competition using salivary cortisol: preliminary studies
Peeters, Marie ULg; Sulon, Joseph; Serteyn, Didier ULg et al

in Journal of Veterinary Behavior : Clinical Applications and Research (2010, July), 5(4), 216

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See detailHeterogeneity of residuals variances of milk fatty acids in dairy cattle
Arnould, Valérie ULg; Soyeurt, Hélène ULg; Vanderick, Sylvie ULg et al

in Journal of Dairy Science (2010, July), 88(E-Suppl. 2), 744

Routine genetic evaluation for milk fatty acids is under development in the Walloon Region of Belgium. The objective of this study was to test the heterogeneity of residual variances and therefore ... [more ▼]

Routine genetic evaluation for milk fatty acids is under development in the Walloon Region of Belgium. The objective of this study was to test the heterogeneity of residual variances and therefore indirectly the potential need to adjust for this heterogeneity if it exists. The residuals were computed as the difference between the observed and the estimated values using a multi-trait random regression test-day model, similar to the Walloon routine model, used for first lactation only milk yield, quantities and percentages of protein (PROT) and fat (FAT), content of saturated fatty acids in milk (g/100g of milk, SAT) and, content of mono-unsaturated fatty acids in milk (g/100g of milk, MONO). Residuals were considered homogeneous inside strata defined, among others, by weeks of lactation, by days in milk and by calendar months of test date. About 6,687,000 records were available for milk yield and for FAT and PROT parameters. For SAT and for MONO, about 184,000 records were available in this database. Means of residuals were stable and close to zero for all traits. Variances were more variable for MONO and SAT than for milk yield, for example. Daily and weekly variances tended to decrease at the end of the lactation (50%). When the variances were computed by month of test date, some variations were observed and some periods of year were more marked. In conclusion, the observed residual variances were less stable for MONO and SAT. We can conclude that introduction for heterogeneous residual variance is more important for the new traits (MONO, SAT) than it was for the old, traditional ones. [less ▲]

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See detailDonation after Cardiac Death In Liver Transplantation :is donor age an issue?
Detry, Olivier ULg; De Roover, Arnaud ULg; Squifflet, Jean-Paul ULg et al

in Transplant International (2010, July), 23(Suppl. 1), 415

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See detailDoes echocardiographic stress test induced release of hsTnT and TnI II?
Le Goff, Caroline ULg; Laurent, Terry; Garweg, Christophe ULg et al

in Clinical Chemistry (2010, July), 56(S6), 128

Background: Cardiac troponins (cTn) are considered as the best biomarkers for detection of myocardial cell injury. In this study, cTnT and cTnI were measured by new commercially available high-sensitive ... [more ▼]

Background: Cardiac troponins (cTn) are considered as the best biomarkers for detection of myocardial cell injury. In this study, cTnT and cTnI were measured by new commercially available high-sensitive methods in patients undergoing brief exercise- or pharmacologicinduced stress. Our aim was to compare cTnT and cTnI levels before and after the stress tests, in the patients with or without reversible ischemia. Materials and Methods: Fifty patients (28 men and 22 women) underwent an echographic stress test (ST) for suspected ischemic heart disease. Of these 50 patients, 28 received pharmacological ST (dobutamine injection) and 22 dynamic ST (bicycle exercise). The patients were subdivided into two groups according to the presence or absence of documented transient reversible ischemia: 14 with reversible ischemia ( mean age: 67.71±9.66 y) and 36 without ischemia ( mean age: 63.17±11.72 y). In all patients, cTnT and cTnI concentrations were measured by high sensitive methods (hsTnT, Roche Diagnostics and TnI II, Abbott Diagnostics) on heparin plasma immediately before (T0) and after ST (T1).The lower detection limit of these assays was 0.005μg/L for hsTnT and 0.01μg/L for TnI II. The protocol was approved by the ethics committee of the University of Liège (Belgium). All patients gave informed consent. All statistical analyses were performed using Medcalc version 8.1 for Windows. P value <0.05 was regarded as statistically significant. Results: There was no significant difference between hsTnT concentrations at T0 and T1, neither in the whole patient group, nor in the subgroups of subjects who received pharmacological ST or dynamic ST. The same was true for TnI II. Although there was no change in hsTnT levels during test in ischemic and in non ischemic patients, the latter tend to demonstrate higher median T0 levels (25th, 75th percentiles) than the others [0.011 (0.007, 0.029) vs 0.007 (0.0047, 0.1125) ng/ml, p=0.09]. They also showed higher median T1 levels [0.014 (0.065, 0.03) vs 0.007 (0.003, 0.0102) ng/ml, p=0.08]. Higher TnI II levels were also recorded in ischemic patients as compared to non ischemic patients at T0[ 0.014 (0.0072; 0.0265) vs 0.005 (0.003; 0.01) ng/ml, p=0.08] and T1[ 0.013 (0.0085- 0.03) vs 0.006 (0.0035-0.008) ng/ml, p=0.08]. Also, TnI II levels did not change during test in both subgroups. Conclusions: Measurement of cardiac troponins by high sensitive methods did not allow to detect significant release of biomarkers from the heart during exercise-or pharmacologic-induced ST, even in patients who demonstrated reversible myocardial ischemia. The type of test – pharmacological or dynamic - was without effect. The patients with induced transient ischemia had however higher troponin T and I levels at baseline, this difference remaining during test. [less ▲]

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See detailNew use of VEGF in therapeutics: application in tendon lesions
Kaux, Jean-François ULg; Le Goff, Caroline ULg; Drion, Pierre ULg et al

in Clinical Chemistry (2010, July), 56(S6), 111

Introduction: As demonstrated in previous studies, mechanical overload, injury and inflammation, hypoxic condition or any combination of the above could lead to increased expression of VEGF in the tendon ... [more ▼]

Introduction: As demonstrated in previous studies, mechanical overload, injury and inflammation, hypoxic condition or any combination of the above could lead to increased expression of VEGF in the tendon. Thus, VEGF could participate in the healing of pathological tendons. Indeed, some authors are convinced that this neovascularization is the sign of a chronic tendinopathy while others plead in favour of it being a sign of healing processes. The VEGF111, which is a biologically active and proteolysis-resistant VEGF-A isoform, was recently identified. It is induced by ultraviolet B and genotoxic drugs. Experimentation shows that, in nude mice, tumors formed by HEK293 cells expressing VEGF111 develop a more widespread peritumoral neovascularisation than those expressing other VEGF isoforms. Good angiogenic activity and resistance to proteolysis makes VEGF111 a potential beneficial therapeutic option for ischemic diseases. The aim of our study was to determine whether if VEGF111 could have a therapeutic interest in the framework of tendinous pathology. Methods (*): A 5mm defect was surgically induced in Achilles tendon of 60 rats. Rats were divided into 2 groups of 30: A: a control group (no injection) and B: with a VEGF111 injection. The rats of group B received an injection of 100 ng of VEGF111 in situ 1 hour after surgery on the site of the tendon lesion. Afterwards, rats of both groups were placed in their cages without immobilization. After 5, 15 and 30 days, 10 rats of each group were euthanized. The traumatized Achilles tendon of each rat was dissected and removed. Immediately after sampling, tendons were submitted to a biomechanical tensile test up to rupture, using a tensile machine with “Cryo-jaw”. Statistical analyses were made with an ANOVA. Results: A significant increase over time of the force necessary to induce tendon rupture was observed for tendons which had been submitted to an injection of VEGF111 (p=0.016). The force required to break the tendon is always greater for the VEGF111 group (p<0.05). Discussion: We demonstrated that the force necessary to induce the rupture of a rat’s Achilles tendon during biomechanical tensile testing was greater for tendons which had been submitted to an injection of VEGF111. Thus, this experimentation showed that VEGF111 injections could accelerate the tendon healing process and increase the force needed to break tendons in their healing process. Conclusion: VEGF111 could be a new therapy for tendon lesions. However, other experimentation using a rat model with different concentrations of VEGF111 should be made to ascertain the best concentration for this healing process. Acknowledgement: This experimentation was partially financed by “Standard de Liège” and “Lejeune-Lechien” grants. (*) All experimental procedures and protocols used in this investigation were reviewed and approved by the Institutional Animal Care and Use Committee of the University of Liège. [less ▲]

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See detailAntibiotic consumption and bacterial resistance
ZAOUI, Kuider; MELIN, Pierrette ULg; CHRISTIAENS, Geneviève ULg et al

in Newsletter SIZ, special issue, abstracts Spring Meeting (2010, June 25)

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See detailHepatic dysfunction or failure and ICU-acquired infection
HUBERLANT, Vincent; LEDOUX, Didier ULg; MASSION, Paul ULg et al

in Newsletter SIZ, special issue, Abstracts Spring Meeting (2010, June 25)

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See detailLe rôle philosophique du concept d’inconscient
Gyemant, Maria ULg

in Studia Europaea (2010, June 10)

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See detailPreparing new regulatory guidelines: the role of the Group for the Respect of Ethics and Excellence in Science (GREES)
Reginster, Jean-Yves ULg

in Annals of the Rheumatic Diseases (2010, June), 69(Suppl.3), 42

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See detailThe evolution of states and phase transitions under cooling of the early universe within the two-Higgs-doublet model
Ginzburg, I. F.; Ivanov, Igor ULg; Kanishev, K. A.

in Russian Physics Journal (2010, June), 53(6), 575-600

The two-Higgs-doublet model (2HDM) realizes ground states (vacuum) with different properties for different parameter values. The parameters of the effective potential change during cooling of the Universe ... [more ▼]

The two-Higgs-doublet model (2HDM) realizes ground states (vacuum) with different properties for different parameter values. The parameters of the effective potential change during cooling of the Universe after the Big Bang. In so doing, the properties of vacuum state can be affected, phase transitions take place. The evolution of phase states and the set of phase transitions can turn out to be much wider than those accounted for within the conventional Standard model (SM) with a single Higgs doublet. The phase history of the Universe is analyzed for any specified set of the 2HDM parameters. All possible variants of the history are considered. Sets of modern, observed, in principle, parameters corresponding to different sequences of thermal phase transitions are determined. Possible cosmological consequences are briefly discussed. [less ▲]

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See detailModeling the vertical spincasting of large bimetallic rolling mill rolls
Studer, Léo ULg; Detrembleur, Sylvain ULg; Dewals, Benjamin ULg et al

in Key Engineering Materials [=KEM] (2010, June), 443

In order to take into account the dynamic effects of molten metal during solidification, a methodology is presented to interface a metal solidification solver (coupled thermal mechanical metallurgical ... [more ▼]

In order to take into account the dynamic effects of molten metal during solidification, a methodology is presented to interface a metal solidification solver (coupled thermal mechanical metallurgical finite elements solver) with a specifically developed flow dynamics solver. (flow dynamics and thermics finite volume solver) The numerical set of tools is designed to be used for the simulation of bimetallic hot rolling mill rolls vertical spincasting. Modeling the industrial process for these products imply certain specifications on the numerical methods used, mainly due to the size of the geometrical domain, low Rossby & Ekman numbers, and a high Reynolds number. [less ▲]

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See detailEffects of an original training program in healthy elderly subjects
Maquet, Didier ULg; BRONFORT, Stéphanie ULg; LECART, Marie-Paule ULg et al

in Annals of the Rheumatic Diseases (2010, June), 69(Suppl 3), 313

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See detailEffects of original rehabilitation programs in patients with fibromyalgia syndrome
Maquet, Didier ULg; BRONFORT, Stéphanie ULg; LECART, Marie-Paule ULg et al

in Annals of the Rheumatic Diseases (2010, June), 69(Suppl 3), 706

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See detailAmbulatory monitoring of energy expenditure and physical activity levels using the SenseWear ArmbandTM system in Parkinson’s disease
Rodriguez de la Cruz, Carlos ULg; Bury, Thierry ULg; Le Scanff, Steren et al

in Movement Disorders : Official Journal of the Movement Disorder Society (2010, June), 25(Suppl 2), 355-356

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See detailGait analysis during an original walking test: Comparison between control subjects and patients with Parkinson’s disease
Maquet, Didier ULg; Croisier, Jean-Louis ULg; Robert, Fanny et al

in Movement Disorders : Official Journal of the Movement Disorder Society (2010, June), 25(Suppl 2), 355

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See detailHealth-related quality of life after total knee or hip replacement: a 7-year prospective study
Bruyère, Olivier ULg; Vanoverberghe, Marie ULg; Neuprez, Audrey ULg et al

in Annals of the Rheumatic Diseases (2010, June), 69(Suppl.3), 469

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See detailValidation of the ImmunoCAP ISAC
Gadisseur, Romy ULg; Blanco Catafal, Anna; Chapelle, Jean-Paul ULg et al

in Clinical Chemistry (2010, June), 56(S6), 97

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See detailEvaluation of Liaison Calcitonin II Gen, a new kit for Calcitonin determination
Cavalier, Etienne ULg; Carlisi, Ignazia ULg; Bekaert, Anne-Catherine ULg et al

in Clinical Chemistry (2010, June), 56(S6), 188

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See detailAnalytical validation of the Abbott Architect urine NGAL
Cavalier, Etienne ULg; Saarbach, D.; Bekaert, Anne-Catherine ULg et al

in Clinical Chemistry (2010, June), 56(S6), 96

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See detailAmbulatory monitoring of energy expenditure and physical activity levels using the SenseWear ArmbandTM system in Parkinson’s disease
Rodriguez de la Cruz, Carlos ULg; Bury, Thierry ULg; Le Scanff, Steren et al

in Movement Disorders : Official Journal of the Movement Disorder Society (2010, June), 25(S2), 355-356

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See detailGait analysis using a wearable accelerometer system: Comparison between control subjects and patients with Parkinson’s disease
Maquet, Didier ULg; Croisier, Jean-Louis ULg; Robert, Fanny et al

in Movement Disorders : Official Journal of the Movement Disorder Society (2010, June), 25(S2), 355

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See detailNetwork Distance Prediction Based on Decentralized Matrix Factorization
Liao, Yongjun ULg; Geurts, Pierre ULg; Leduc, Guy ULg

in Lecture Notes in Computer Science (2010, May 11), 6091

Network Coordinate Systems (NCS) are promising techniques to predict unknown network distances from a limited number of measurements. Most NCS algorithms are based on metric space embedding and suffer ... [more ▼]

Network Coordinate Systems (NCS) are promising techniques to predict unknown network distances from a limited number of measurements. Most NCS algorithms are based on metric space embedding and suffer from the inability to represent distance asymmetries and Triangle Inequality Violations (TIVs). To overcome these drawbacks, we formulate the problem of network distance prediction as guessing the missing elements of a distance matrix and solve it by matrix factorization. A distinct feature of our approach, called Decentralized Matrix Factorization (DMF), is that it is fully decentralized. The factorization of the incomplete distance matrix is collaboratively and iteratively done at all nodes with each node retrieving only a small number of distance measurements. There are no special nodes such as landmarks nor a central node where the distance measurements are collected and stored. We compare DMF with two popular NCS algorithms: Vivaldi and IDES. The former is based on metric space embedding, while the latter is also based on matrix factorization but uses landmarks. Experimental results show thatDMF achieves competitive accuracy with the double advantage of having no landmarks and of being able to represent distance asymmetries and TIVs. [less ▲]

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See detailAnnual-scale adaptation of a soil heterotrophic respiration model to three agricultural sites in Belgium and South-Western France.
Buysse, Pauline ULg; Le Dantec, Valérie; Mordelet, Patrick et al

in Geophysical Research Abstracts (2010, May 06), 12

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See detailRepräsentation et intentionnalité. Sur l’impossibilité de purger l’intentionnalité de tout objet immanent
Gyemant, Maria ULg

in Bulletin d'Analyse Phénoménologique (2010, May 03)

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See detailThe Power of Deconvolution for Study of QSO Host Galaxies
Letawe, Géraldine ULg; Letawe, Yannick; Magain, Pierre ULg

in Proceedings of the International Astronomical Union, IAU Symposium (2010, May 01), Vol 267

The major challenge in studying QSO host galaxies is to remove the QSO contribution, which often outshines the whole system. Our group has acquired the technical ability to handle such data, for images ... [more ▼]

The major challenge in studying QSO host galaxies is to remove the QSO contribution, which often outshines the whole system. Our group has acquired the technical ability to handle such data, for images and slit spectroscopy, as well as integral field spectroscopy. We review here the major techniques developed by our team, and their latest applications. We are open for collaboration with other teams to spread the use of these powerful techniques. [less ▲]

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See detailPostnatal growth restriction may be limited in very-low-birth-weigth infants.
Senterre, Thibault ULg; Habibi, Fakher; Rigo, Jacques ULg

in Journal of Maternal-Fetal & Neonatal Medicine (2010, May), 23(S1), 325-326

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See detailComparison of agricultural soils' structure depending on tillage system using X-ray microtomography
Beckers, Eléonore ULg; Ly, Sarann ULg; Léonard, Angélique ULg et al

in Geophysical Research Abstracts (2010, May), 12

This study aims at characterizing agricultural soils’ structure depending on the tillage system: conventional tillage or conservational tillage. Tillage reduction is an increasing practice, but the micro ... [more ▼]

This study aims at characterizing agricultural soils’ structure depending on the tillage system: conventional tillage or conservational tillage. Tillage reduction is an increasing practice, but the micro-structural effects on soils and on their hydrodynamic parameters are still not well described. Recent research shows non-converging results. Our point is to highlight fundamental differences in structure through characterization of soils porosity’s parameters using X-ray microtomography measurements coupled to image analysis. This attempt is in line with a more integrated experiment of which the aim is to quantify the effects of tillage intensity on lateral flow production, and finally on global water balance. Parameters’ measurements consist in a combined approach, based on two different space-time scales of exploration: fundamental scale, with soil sampling campaign for microtomography analysis, and field scale, with continuous flow measurements (plots’ dimensions: 18*28 m). For their part, parameters for water balance determination (precipitation, evapotranspiration…) are monitored on the field. All of these measurements have the main objective of hydrological modeling enhancement by taking into account a better lateral flow description. Discussion in this paper will focus on the first results obtained by X-ray microtomography measurements. Our experiment takes place in Gentinnes (Walloon Brabant, Belgium), on a field organized in a split-plot scheme. Since 2004, plots have been cultivated in conventional tillage or in reduced tillage. The latter consists in sowing after stubble ploughing of about 10cm. The crop rotation is sugar beet followed by winter wheat. The soil is mainly composed of silt loam. Soils samples, with a 3 cm diameter and a 5 cm height, were removed from the upper layer (Ap horizon) for both management practices. Samples are scanned by X-ray microtomography using a Skyscan-1172 high-resolution desk-top micro-CT system (Skyscan, Kontich, Belgium). The cone beam source operated at 100 kV, using an aluminium filter. The detector configuration, i.e. 1048×2000 pixels 16-bit X-ray camera, and the distance source-object-camera were adjusted to produce images with a pixel size of 17 µm. This resolution allows us to visualize both meso- and macro- porosity. In this study, half the samples were placed under a 15000 kPa pressure (corresponding pressure for the wilting point) in Richards’ apparatus in order to empty the meso- and macro-porosity. To determine a priori the class of porosity for the samples, relations between water retention and pressure head can be plotted using this apparatus. Scanning results consist in 2D images. The 2D images are recombined to form 3D structure. Then the pore network can be analyzed through useful factors like size distribution, shape, connectivity, orientation, tortuosity etc. [less ▲]

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