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See detailComparison of Real-Time Aspergillus PCR with Platelia™AspergillusEIA in broncho-alveolar lavage fluids for the diagnosis of invasive aspergillosis in neutropenic and non-neutropenic patients
RUZICKA, NADIA; BOREUX, Raphaël ULg; LEVAUX, Laetitia ULg et al

Poster (2013, April 27)

Objectives. Because of low sensitivity of fungal cultures and lack of standardization of Aspergillus PCR, laboratory diagnosis of invasive aspergillosis still relies on galactomannan (GM) detection in ... [more ▼]

Objectives. Because of low sensitivity of fungal cultures and lack of standardization of Aspergillus PCR, laboratory diagnosis of invasive aspergillosis still relies on galactomannan (GM) detection in broncho-alveolar lavage (BAL) fluids and serum. The aim of this study was double: first, to assess the place of a 18S rRNA Aspergillus real-time PCR test performed in BAL fluid for the diagnosis of invasive aspergillosis (IA) in neutro- and non-neutropenic patients in comparison with GM detection; secondly, to evaluate the use of three different GM cut-off values. Materials and methods. A total of 111 neutropenic and non-neutropenic patients hospitalized at the University hospital of Liège from March to October 2012 with suspicion of IA were included in the study. A total of 138 broncho-alveolar lavage fluids were evaluated by three laboratory diagnostic methods: 1/ culture on Sabouraud agar slants with antibiotics (bioMérieux, France) incubated at 28°C for 28 days; 2/ GM detection (Platelia ™Aspergillus EIA, Biorad) using GM index cut-off values at 0.5, 0.8 and 1, performed three times a week; 3/ a real-time Aspergillus PCR assay performed daily and targeting the 18S rRNA genes by using an in-house method. Clinical, radiological and microbiological data were reviewed for classification of patients. Results. Nine patients developed probable or possible IA. The sensitivity/specificity/positive (VPP) and negative (NPV) predictive values (%) for culture, PCR, and GM using 0,5 as cut-off value were respectively 41/100/100/94, 58/97/70/96, and 91/83/34/99. The use of 0,8 and 1 as GM index cut-off values increased the specificity to 89 and 92% respectively, and the VPP to 44 and 54%. PCR had a better turn-around time and allowed the detection of Aspergillus colonisation. Conclusion: GM detection in BAL fluids using a cut-off value of 1 was the most efficient laboratory test for the diagnosis of IA in neutropenic and non-neutropenic patients. Despite a lower sensitivity, PCR had a better VPP, and allowed the detection of culture-negative Aspergillus colonisations. A shorter turnaround time (TAT) due to daily practice of PCR tests may reduce the time-to-treatment up to 24 hours. [less ▲]

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See detailGoverning food security globally - stakeholders` opinions
Paveliuc Olariu, Codrin ULg

Scientific conference (2013, April 27)

While more than 850 million people are starving (FAO, 2012) around the world, agricultural production grew at about 2.3% per year in the past 50 years and access to food increased with an even higher rate ... [more ▼]

While more than 850 million people are starving (FAO, 2012) around the world, agricultural production grew at about 2.3% per year in the past 50 years and access to food increased with an even higher rate. By 2012, almost 65% of all implemented agricultural policies (focused at national, regional and global level) that have a reference on food security only aim on solving present day crisis, without integrating policies for preventing future ones. While the League of Arab States (LAS) called for an integrated Arab approach to agricultural policy to the Arab Organization for Agricultural Development (AOAD), the League of African Nations did not yet agree on common objectives in matters regarding agriculture and rural development despite AGRA Alliance for a Green Revolution in Africa, a network of US based iNGOs` who`s board is chaired by Kofi Annan, former Secretary General of the United Nations, took on the challenge of reforming this continent`s agriculture. Although the European Union has the Common Agricultural Policy that works on a 7 years framework with a wide budgetary support from the European Commission and all 27 Member States and China has an agricultural policy working under the ridged 5-years system, food security and food quality are becoming the main concerns in the world leaders minds with the population reaching 7 billion on October 31st 2011 and resources becoming scarce. This paper analyses the stakeholders` opinions on the possibility of changing the policy instruments status quo that would enable a coherent exchange of good practices and information throughout the world to a global approach to food security and food quality that is necessary for overcoming problems like famine in Africa, obesity in North America and high risk and vulnerability for human health and the environment. The key questions that are answered in this paper are: What are the common elements of agricultural policies with regional reach that can constitute objectives for a Global Agricultural Policy (GAP)? Which organization could manage a GAP and what would be its main driving mechanisms? What kind of impact would have a global mechanism in agriculture and rural development acting at different levels? What are the determinants for the successful creation and implementation of a GAP? [less ▲]

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See detailFernand De Visscher als Archäologe - die Elefanten aus Alba Fucens
Gerkens, Jean-François ULg

Scientific conference (2013, April 27)

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See detailEpargne sanguine en chirurgie cardiaque : Etude rétrospective des pratiques
ERPICUM, Marie ULg; DEFRAIGNE, Jean ULg; LARBUISSON, Robert ULg

Report (2013)

Cette étude rétrospective s’inscrit dans le cadre des recherches de la thèse de doctorat sur l’épargne sanguine à travers l’itinéraire clinique du patient opéré cardiaque. Son objectif est de dresser un ... [more ▼]

Cette étude rétrospective s’inscrit dans le cadre des recherches de la thèse de doctorat sur l’épargne sanguine à travers l’itinéraire clinique du patient opéré cardiaque. Son objectif est de dresser un état des lieux de la prise en charge des patients opérés cardiaques au CHU de Liège, des pratiques d’épargne sanguine qui y sont employées et de leur impact sur le recours à la transfusion, les durées de séjour et la mortalité. Cet audit devrait permettre de 1) mettre en évidence les éléments pouvant être améliorés dans l’organisation actuelle de la prise en charge de ces patients afin de concourir aux objectifs d’épargne sanguine 2) servir de base à l’élaboration d’un itinéraire clinique du patient opéré cardiaque. [less ▲]

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See detailGestion du stress et de la fatigue, que nous apprend la simulation
Nyssen, Anne-Sophie ULg

Conference (2013, April 26)

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See detailLa pratique de la Cour pénale internationale à l’épreuve des droits fondamentaux : tentative de transposition d’une contrainte nationale à un contexte globalisé
Deprez, Christophe ULg

Conference (2013, April 26)

Cette présentation Power Point a servi de support à une communication orale effectuée dans le cadre de l'édition 2013 de la Conférence des Assistants en droit de Belgique (ACCA), organisée le 26 avril ... [more ▼]

Cette présentation Power Point a servi de support à une communication orale effectuée dans le cadre de l'édition 2013 de la Conférence des Assistants en droit de Belgique (ACCA), organisée le 26 avril 2013 par l'Université Libre de Bruxelles. [less ▲]

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See detail‘Changer de microscope’ : Vers une analyse longitudinale des carrières politiques dans les systèmes multi-niveaux
Dodeigne, Jérémy ULg

Conference (2013, April 26)

Les modèles de carrière politique en Belgique, au Canada, en Espagne et au Royaume-Uni ont profondément évolué au cours des trois dernières décennies avec l’instauration des parlements régionaux et sous ... [more ▼]

Les modèles de carrière politique en Belgique, au Canada, en Espagne et au Royaume-Uni ont profondément évolué au cours des trois dernières décennies avec l’instauration des parlements régionaux et sous l’effet de leur professionnalisation. De récentes recherches ont démontré que, loin de constituer un simple tremplin vers le niveau national, le niveau subnational constitue une arène politique professionnelle à part entière. En nous basant sur une analyse longitudinale de l’ensemble des 2.450 carrières en Catalogne (n=1.044), en Écosse (n=368), au Québec (n=619) et en Wallonie (n=419) depuis l’instauration des parlements régionaux, nous démontrons tout d’abord que plusieurs modèles de carrière coexistent au sein d’une même région. Pour cela, un ‘changement de microscope’ est requis en utilisant les trajectoires individuelles comme unité d’analyse au lieu des seuls mouvements verticaux entre niveaux de pouvoirs. Enfin, nos résultats en ce qui concerne la variabilité interne des modèles (mesurée en fonction des partis politiques mais aussi du genre et de l’origine territoriale) invitent à des recherches complémentaires pour mieux comprendre les dynamiques de carrière, notamment dans leur dimension identitaire. Jusqu’alors considérée comme une variable explicative secondaire, cette dimension semble au contraire constituer une variable explicative de première ordre dans les quatre régions analysées. [less ▲]

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See detailCritique et idéologie. La conception althussérienne de la philosophie
Mancuso, Eva ULg

Scientific conference (2013, April 26)

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See detailModified TiO2-based Photocatalytic Films and Powders produced by Aqueous and Non-Aqueous Sol-Gel Processes for Water Purification
Malengreaux, Charline ULg

Doctoral thesis (2013)

Summary Two major research goals have been proposed for this thesis. The first goal concerns the development of photocatalysts in the shape of thin films coated on glass substrates which includes (i) the ... [more ▼]

Summary Two major research goals have been proposed for this thesis. The first goal concerns the development of photocatalysts in the shape of thin films coated on glass substrates which includes (i) the development of a sol-gel chemistry suitable for the production of stable colloidal suspensions of TiO2 particles, (ii) the optimization of the deposition method and (iii) the development of an experimental device to measure the photocatalytic activity of the films. The second objective is the development of innovative non-aqueous and aqueous sol-gel routes, including the development of new methods for the introduction of dopants as well as the photocatalytic testing of the resulting materials. Two original non-aqueous sol-gel processes involving respectively, an in situ production of water and the controlled addition of a small amount of water, have been developed to produce a series of stable colloidal suspensions of TiO2 particles (sols). From those sols, transparent, adherent, homogeneous thin films have been produced using an optimized dip-coating deposition method and have been proven to be photocatalytically active for the degradation of an organic pollutant in aqueous solution. The photocatalytic activity of the films has been improved through an increase of their roughness thanks to the addition of an organic additive into the sol, leading to an increased active surface involved into the photocatalytic reaction. A mathematical model allowing the rigorous evaluation of the kinetic parameters of the photocatalytic reaction taking into account the influence of the variation of the volume inside the batch photoreactor has been developed. The equations have been established in the case of a photocatalytic powder homogeneously dispersed in the pollutant solution, and in the case of a photocatalytic thin film placed at the bottom of the reactor. The particular case of a first order reaction has been treated and the error on the reaction rate constant induced by neglecting the volume variation has been quantified. An environmentally-friendly aqueous sol-gel process for producing undoped and Cu2+, Ni2+, Zn2+, Pb2+, Fe3+, Cr3+, La3+ or Eu3+ single-doped as well as La3+- Fe3+ and Eu3+- Fe3+ co-doped TiO2 bulk photocatalysts composed of nanocrystallites of anatase and exhibiting a remarkably high photocatalytic activity without requiring any calcination step has been developed. Different effects of the metal ion dopant on the photocatalytic activity have been observed and discussed according to the dopant nature and content. A kinetic study of the photocatalytic degradation of a model pollutant (4-nitrophenol) in aqueous solution under UV-Visible light (330 nm < λ < 800 nm) has been performed over a promising TiO2-Zn2+ doped catalyst. Statistical validations have confirmed the suitability of the phenomenological reaction rate model developed to represent the 4-nitrophenol photocatalytic degradation over time. [less ▲]

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See detailÀ la limite de l’orthodoxie, aux confins de l’imperium christianum
Close, Florence ULg

Conference (2013, April 26)

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See detailCompost Pile Monitoring Using Different Approaches:GC-MS, E-nose and dynamic olfactometry
Gutierrez, M. C.; Chica, A. F.; Martin, M. A. et al

in Waste and Biomass Valorization (2013)

The evaluation of odour emissions associated to the composting process is complex because these emissions depend on several factors such as the raw material to be composted, the different stages of the ... [more ▼]

The evaluation of odour emissions associated to the composting process is complex because these emissions depend on several factors such as the raw material to be composted, the different stages of the composting process, meteorological conditions, and others. For this reason, the aim of this paper is to compare complementary approaches to monitor odours. The odour source selected for this study is green waste compost at different maturity stages. The study site is a composting facility located in the south of Belgium. The compared approaches were: a portable e-nose developed by the Environmental Monitoring Research team (Arlon, Belgium) to monitor odorous emissions from the composting piles; chemical analyses performed in the laboratory using a GC–MS (manufactured by Thermo) to analyse volatile organic compounds which were collected by active sampling on Tenax TA sorbent simultaneously to the in situ e-nose measurements and olfactometric measurements to determine the odour concentration (ouE/m3) using the Odile olfactometer (Odotech). The portable e-nose was also used in the laboratory with compost odour samples collected in bags. The large numbers of data sets obtained were explored by statistical methods such as principal components analysis. The results obtained highlight the advantages of monitoring the composting process with these three approaches. Each approach gives different information about the composting process and the emissions generated. While the e-nose is capable of identifying some chemical family emissions and some activities such as turning steps, the GC–MS identifies each chemical compound emitted and dynamic olfactometry quantifies the odour concentration (ouE/m3) in relationship with these emissions. [less ▲]

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See detailNourishing the body, crafting the self, facing the other. Subjectivities and encounters through Moroccan food in Italy
Mescoli, Elsa ULg

Scientific conference (2013, April 25)

Each individual is composed of material objects and practices that witness one’s personal life history and everyday life and which shape one’s same subjectivity (Julien and Rosselin 2009). Subjectivity ... [more ▼]

Each individual is composed of material objects and practices that witness one’s personal life history and everyday life and which shape one’s same subjectivity (Julien and Rosselin 2009). Subjectivity that is fulfilled through material culture, the performing of which turns out to be a technology of the self (Martin, Gutman, Hutton 1988). Considering the subject as the result of praxeological activities and of the incorporation of objects belonging to one’s meaningful universe of reference and action, my paper aims at exploring the construction of the self of Moroccan female migrants through their body techniques exerted while cooking. Specific gestures are performed to adhere to a cultural heritage which needs to be preserved while living abroad. An essentialized bodily tradition, relying on a set of specific objects, becomes the place where, on the one hand, the members of a community share knowledge. On the other hand, such tradition lets an encounter with otherness take place. As a matter of fact, in the context considered, food is a frequent object of intercultural policies and practices, giving migrants a controlled opportunity to express themselves while producing material culture. A locally held Arabic cooking class, for example, provides the occasion to perform cultural differences (or similarities) by means of corporeal languages. My presentation will consider the body both in its private and public dimensions, since constantly intertwined. Through images and videos I will show what such embodied material knowledge consists of and in which ways it is the object of social dynamics and interactions. [less ▲]

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See detailReturn-To-Play criteria after hamstring injury: actual medicine practice in professional soccer
Delvaux, François ULg; Rochcongar, Pierre; Bruyère, Olivier ULg et al

Poster (2013, April 25)

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See detailLes allergies alimentaires : point de vue du biologiste
GADISSEUR, Romy ULg

Conference (2013, April 25)

Detailed reference viewed: 28 (4 ULg)