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See detailMethodology and setup of the adopted groundwater vulnerability assessment method
Beaujean, Jean ULg; Lemieux, Jean-Michel; Brouyère, Serge ULg

Scientific conference (2010, February 04)

Detailed reference viewed: 45 (10 ULg)
See detailApplication of magnetic susceptibility on different carbonate systems
Da Silva, Anne-Christine ULg

Scientific conference (2010, February 02)

Detailed reference viewed: 5 (0 ULg)
See detailAccoucher au Nord et Nord-est brésilien. Articulation entre savoir, pouvoir et pratiques
Schoonbroodt, Bénédicte ULg

Scientific conference (2010, February 02)

Detailed reference viewed: 22 (2 ULg)
See detailEléments pour une histoire des pratiques éditoriales en Belgique
Durand, Pascal ULg

Scientific conference (2010, February 01)

Detailed reference viewed: 20 (5 ULg)
See detailLa participation des étudiants : une méthode d'apprentissage particulière
Piet, Grégory ULg; Stans, David ULg

Scientific conference (2010, February 01)

Detailed reference viewed: 23 (7 ULg)
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See detailFlamelet-based combustion model for supersonic combustion
Terrapon, Vincent ULg

Scientific conference (2010, February)

Detailed reference viewed: 25 (2 ULg)
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See detailMulti-physics modeling
Terrapon, Vincent ULg

Scientific conference (2010, February)

Detailed reference viewed: 13 (3 ULg)
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See detailLa validation des compétences en Belgique francophone
Danse, Cédric ULg

Scientific conference (2010, February)

Detailed reference viewed: 181 (10 ULg)
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See detailLa etica de la investigacion en ciencias sociales
Jacquemain, Marc ULg

Scientific conference (2010, February)

La presentacion se centra sobre los problemas de confidencialidad y de respeto de los sujetos de investigaciones sociales. Como tratar de obtener las informaciones necesarias respstando todos los derechos ... [more ▼]

La presentacion se centra sobre los problemas de confidencialidad y de respeto de los sujetos de investigaciones sociales. Como tratar de obtener las informaciones necesarias respstando todos los derechos des las poblaciones que son investigadas. [less ▲]

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See detailImproving Null Depth Measurement with statistics : theory and first results with the Palomar Fiber Nuller
Hanot, Charles ULg

Scientific conference (2010, February)

A unique statistical data analysis method has been developed for reducing nulling interferometry data. The idea is to make use of the statistical distributions of the fluctuating null depths and beam ... [more ▼]

A unique statistical data analysis method has been developed for reducing nulling interferometry data. The idea is to make use of the statistical distributions of the fluctuating null depths and beam intensities to retrieve the astrophysical null depth in the presence of fluctuations. The approach yields an accuracy much better than is possible with standard data reduction methods, because the accuracy of the null depth is not limited by the sizes of the phase and intensity errors but by the uncertainties on these errors. The result is an improvement in the instrumental null depth measurement limit of roughly an order of magnitude. We show in this paper that broadband null depths of 10-4 can be measured in the lab with our infrared Fiber Nuller without achromatic phase shifters. On sky results are also dramatically improved, with measured contrasts up to 5 x 10-4 with our instrument mounted on the Hale telescope at the Palomar Observatory. This statistical analysis is not specific to our instrument and may be applicable to other interferometers. [less ▲]

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See detailRôles et formation des tuteurs intervenant dans des dispositifs de FOAD
Denis, Brigitte ULg

Scientific conference (2010, February)

Cette conférence aborde les points suivants : - e-tuteur : un nouveau rôle du formateur ? - Des rôles différenciés selon les DFOAD - Formation des e-tuteurs - Exemples de profils d’intervention

Detailed reference viewed: 63 (7 ULg)
See detailSome Analytical Aspects of Comprehensive Two-Dimensional GC (GCxGC) MS
Focant, Jean-François ULg

Scientific conference (2010, February)

Detailed reference viewed: 7 (0 ULg)
See detailPolitique et religieux : peut-on parler d’une exception islamique ?
Nachi, Mohamed ULg

Scientific conference (2010, February)

Comment se pose la question du rapport en religion et politique en islam

Detailed reference viewed: 7 (2 ULg)
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See detailCELINE : CELestial Infrared Nulling Experiment
Hanot, Charles ULg

Scientific conference (2010, February)

The small angular distance (<100 mas) and the huge flux ratio (10^7) between an Earth-like exoplanet in the so-called habitable zone and its host star makes it very difficult to direct image such systems ... [more ▼]

The small angular distance (<100 mas) and the huge flux ratio (10^7) between an Earth-like exoplanet in the so-called habitable zone and its host star makes it very difficult to direct image such systems. Nulling interferometry consists of a very powerful technique that combines destructively the light from two or more collectors to dim the starlight and to reveal faint companions in its vicinity. We have developed a new nulling experiment based on the fiber nuller principle (Serabyn et al. 2006 , Martin et al. 2008). This fully symmetric reflective nulling bench aims at testing broadband nulling in both H and K bands as well as characterizing photonic fibers for modal filtering. We present in this paper the design, the development as well as preliminary results of the experiment. [less ▲]

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See detailMetodología de la investigación en ciencias de la educación
Lucchini, Silvia ULg

Scientific conference (2010, February)

Detailed reference viewed: 15 (2 ULg)
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See detailPerformance comparison between JWST/MIRI+NIRCam & VLT/SPHERE for exoplanet detection
Hanot, Charles ULg

Scientific conference (2010, February)

Performance comparison between JWST/MIRI and VLT/SPHERE for exoplanet detection Charles Hanot, Olivier Absil, Anthony Boccaletti, Céline Cavarroc, Jean Surdej In the context of exoplanet detection, a ... [more ▼]

Performance comparison between JWST/MIRI and VLT/SPHERE for exoplanet detection Charles Hanot, Olivier Absil, Anthony Boccaletti, Céline Cavarroc, Jean Surdej In the context of exoplanet detection, a large majority of the 400 detected exoplanets have been found by indirect methods. Today, progress in the field of high contrast imaging has allowed direct images of several exoplanetary systems to be taken (cf. HR 8799, Fomalhaut). In the near future, several new instruments are going to dramatically improve our sensitivity to exoplanet detection. Among these, SPHERE ( Spectro Polarimetric High contrast Exoplanet REsearch ) at the VLT and MIRI ( Mid Infra-Red Instrument) onboard JWST will both be equipped with coronagraphs to reveal faint objects in the vicinity of nearby stars. In this paper, we make use of the most recent evolutionary models of young (sub-)stellar objects and exoplanets to derive their luminosities in order to compare the sensitivity of SPHERE to that of MIRI. From this comparison, we present a catalogue of targets which are particularly well suited for MIRI with possible detections of planets down to (sub-)Saturn masses. [less ▲]

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See detailHow to capture Doppelganger Brand Image with Brand Concept Mapping
Brandt, Céline ULg; Pahud de Mortanges, Charles ULg; Van Riel, Allard et al

Scientific conference (2010, February)

In a Web 2.0 context, negative user-generated content (UGC) that damages the brand reputation can be easily produced and quickly spread. There is a lack of literature on how to measure the value ... [more ▼]

In a Web 2.0 context, negative user-generated content (UGC) that damages the brand reputation can be easily produced and quickly spread. There is a lack of literature on how to measure the value destruction, known as doppelgänger brand image (DBI). The authors define DBI as the appearance, or reinforcement, of negative associations at the brand reputation level. Brand reputation is the collective brand image that is shared by multiple stakeholders. Using brand concept mapping (BCM) on two corporate brands, this study shows the effect of exposure to negative UGC on the brand image perception and measures the impact of this exposure on DBI. The authors use a two*two between-subjects design with 280 consumers in order to study the effects of the type of media and source credibility, brand experience and Internet experience on the DBI. The results suggest that, the negative UGC will cause an increase in the frequency of mentions of negative associations. At the reputation level, if the brand already has a DBI, an exposure to negative UGC will reinforce it. However, if the brand reputation is mostly positive, a single exposure to negative UGC will not create a DBI. The results also confirm the effect of source credibility and type of media on the likelihood of DBI. The experience with the brand and with Internet will reduce the risk of DBI. [less ▲]

Detailed reference viewed: 184 (0 ULg)
See detailMaster Class on Migration and Integration
Martiniello, Marco ULg

Scientific conference (2010, January 28)

Detailed reference viewed: 7 (0 ULg)
See detailSubversions de la modernité américaine : l’écriture graphique de Chris Ware (The Adventures of Jimmy Corrigan.The Smartest Kid on Earth)
Hagelstein, Maud ULg

Scientific conference (2010, January 28)

La bande dessinée est-elle un médium moderne ou postmoderne ? Les dessinateurs les plus créatifs, chevilles ouvrières des maisons d’édition indépendantes, défendent la modernité du médium. On pense ... [more ▼]

La bande dessinée est-elle un médium moderne ou postmoderne ? Les dessinateurs les plus créatifs, chevilles ouvrières des maisons d’édition indépendantes, défendent la modernité du médium. On pense notamment à la position de Jean-Christophe Menu sur le sujet. Dans le « manifeste » de l’Association (les 3 numéros de la revue « théorique » L’éprouvette), plusieurs auteurs défendent l’actualité de la notion d’Avant-Garde. Leur thèse se résume comme suit : si la peinture ou la littérature ont vu l’époque des Avant-Guardes laisser place à la postmodernité, la bande dessinée, au moins, n’a pas encore été touchée par la désillusion qui lui est propre. Immaturité revendiquée des dessinateurs qui croient encore pouvoir révolutionner totalement les codes de leur médium et proposer une version neuve de la bande dessinée, en rupture avec ses origines. Cette notion de « rupture » (ou de « crise » d’ailleurs) est tout-à-fait centrale et caractéristique de la modernité – la postmodernité, de par son système de citations (même impertinentes et détournées), ne fait que renouer avec un passé stérile qu’elle recycle infiniment (parce qu’elle est dénuée de tout enjeu révolutionnaire, de toute lutte interne). Mais par ailleurs, la bande dessinée est traversée par des éléments de la postmodernité. Du point de vue de son contenu, elle marque de plus en plus un désaccord radical avec la modernité consumériste, le culte de la marchandise et des effets de « mode », la vie citadine et l’homogénéisation des masses. Elle est l'un des lieux d’expression privilégiés de la désillusion du peuple relativement aux grandes utopies de transformation rationnelle du monde et d’émancipation de l’homme (expression privilégiée des minorités de genre ou de race – ce qui est souvent mis en exergue dans les cultural studies). Par ailleurs, à suivre Jean-François Lyotard, la postmodernité ne se caractérise pas uniquement par sa violente performativité (le culte de l’Utilité remplaçant dans les savoirs scientifiques celui de la Vérité), mais elle montre aussi une prise en compte croissante des instabilités et développe une « paralogie » que nourrirait probablement une certaine bande dessinée (et plus généralement une certaine para-littérature). [less ▲]

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See detailLocation and market area of rail-road terminals
Limbourg, Sabine ULg; Jourquin, Bart

Scientific conference (2010, January 28)

The European transport policy has focused on sustainable transport solutions. One of its objectives for freight transport is to restore the balance between modes and to develop intermodality. Among the ... [more ▼]

The European transport policy has focused on sustainable transport solutions. One of its objectives for freight transport is to restore the balance between modes and to develop intermodality. Among the various types of intermodal transports, this research is concerned with rail-road container terminals embedded in a hub-and–spoke network. These terminals will further be referred to as hubs. Hub-and-spoke networks have been implemented in a number of transportation systems when it is favourable to consolidate and disseminate flows at certain locations called hubs. The efficiency of such a network depends on the location of the hubs. The problem is to find the optimal hub locations and to allocate the remaining nodes to these hubs. This problem is known as the p-hub median problem (p-HMP) where p is the number of hubs to locate. This location-allocation problem is proved to be NP-hard. The time needed to solve it increases as the number of nodes exponent three. Thus, in order to model rail-road transport on the trans-European networks, a subset of nodes that can be considered as good potential locations is needed. We applied the p-HMP to a set of potential locations obtained by both spatial aggregation of demand nodes using hierarchical clustering methods and by a flow-based approach which takes the flows of commodities and their geographic spread into account. They showed that the latest method gives better results and that is why it is retained to determine a set of potential locations. The set of potential locations is used as input for an iterative procedure. One of the main contributions of this research is to propose this iterative procedure based on both the p-HMP and the multi-modal assignment problem. Moreover, the objective function of our p-hub median formulation includes the costs for pre- and post-haulages by road, trans-shipment (according to the number of handled containers into account) and rail haulage. Furthermore, in the p-hub median problem, the total demand is assigned to the hubs. In this research however, the demand can be assigned over all the transportation modes, with the possibility (but not the obligation) of using the trans-shipment facilities. Finally, we presents a methodology able to compare road and rail-road intermodal market areas that takes the network structures, the operation costs and the location of the rail-road terminals into account. This methodology is applied to the optimal configurations obtained by the resolution of the p-HMP and the p-hub centre problem (p-HCP) for the whole trans-European network. Indeed, p-HMP has an efficiency goal by minimizing the total transportation cost. The hub network design obtained by this method can sometimes lead to unsatisfactory results when worst-case origin-destination pairs are separated by a very large distance. Therefore, the p-HCM meets the equity objective by minimizing the maximum cost of a combined transport. [less ▲]

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See detailDÉTERMINATION DU « N » DANS UN PROTOCOLE EXPÉRIMENTAL IN VIVO
Rozet, Eric ULg

Scientific conference (2010, January 27)

Detailed reference viewed: 3 (0 ULg)
See detailMusique populaire et expression politique des minorités
Martiniello, Marco ULg

Scientific conference (2010, January 26)

Detailed reference viewed: 12 (1 ULg)
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See detailSavoir, lutte et organisation: les étudiants allemands et le Spatkapitalismus
Cavazzini, Andrea ULg

Scientific conference (2010, January 23)

Detailed reference viewed: 62 (0 ULg)
See detailEvolution de l'espèce invasive Senecio inaequidens en réponse aux variations de climat
Monty, Arnaud ULg

Scientific conference (2010, January 21)

Detailed reference viewed: 27 (9 ULg)
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See detailModélisation de l’ionosphère pour les utilisateurs Galileo simple fréquence
Bidaine, Benoît ULg

Scientific conference (2010, January 21)

Detailed reference viewed: 123 (38 ULg)
See detailNew developments in medical imaging applied to Neurosurgery
Martin, Didier ULg

Scientific conference (2010, January 20)

Detailed reference viewed: 15 (0 ULg)
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See detail« Traduire ou ne pas traduire » : un dilemme bien connu des auteurs grecs et latins
Rochette, Bruno ULg

Scientific conference (2010, January 20)

Detailed reference viewed: 32 (1 ULg)
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See detailLe développement de la fonction narrative chez l'enfant et l'adolescent
Boulard, Aurore ULg

Scientific conference (2010, January 16)

L’étude de l’utilisation des pronoms personnels s’inscrit dans une recherche plus large sur la fonction narrative autobiographique chez des enfants de 2 ans et demi à 10 ans. Les recherches récentes sur ... [more ▼]

L’étude de l’utilisation des pronoms personnels s’inscrit dans une recherche plus large sur la fonction narrative autobiographique chez des enfants de 2 ans et demi à 10 ans. Les recherches récentes sur le développement de la conscience de soi chez l’enfant grâce à l’analyse du discours narratif sont intéressantes à plus d’un titre et nous permettent de poser des hypothèses sur la manière dont l’enfant construit sa capacité à raconter des évènements, à les structurer dans le temps afin d’en faire un récit cohérent. [less ▲]

Detailed reference viewed: 85 (13 ULg)
See detailHallucinations: historical concepts, characteristics, epidemiology and models
Laroi, Frank ULg

Scientific conference (2010, January 13)

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See detailL'automesure de la pression artérielle
Saint-Remy, Annie ULg; Krzesinski, Jean-Marie ULg

Scientific conference (2010, January 12)

Detailed reference viewed: 13 (2 ULg)
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See detailRemote sensing assessement of irrigated areas extension in the Kou watershed
Traore, Farid ULg; Tychon, Bernard ULg

Scientific conference (2010, January 12)

The Kou watershed is a geographical space having important water resources, whose are used between: drinking water supply of Bobo-Dioulasso city (Burkina-Faso’s second most important city) and surrounding ... [more ▼]

The Kou watershed is a geographical space having important water resources, whose are used between: drinking water supply of Bobo-Dioulasso city (Burkina-Faso’s second most important city) and surrounding localities; agriculture through very important irrigated surfaces; industry; fauna and flora preservation, through a minimal sanitary debit guaranteed. Since some decades, one observes more and more increased pressure on Kou water resources. From an agricultural point of view, a comparative visual observation of irrigated surfaces during the years 1980 and during years 2000 shows an increase of surfaces. It would be then appropriate to establish a potential of irrigation of the set of available water resources in order to estimate maximal irrigable surfaces by water resources. Thus, this study has for goal the evaluation of Kou watershed irrigated zones surface, with the help of remote sensing. In order to facilitate irrigated zones detection, the study will focused on the period between January and June, where all cultures are irrigated with Kou watershed surface water and/or groundwater. The chosen methodology is images classification in order to extract irrigated zones surface. We had for this study a set of images and various data: Landsat-4 TM, Landsat-5 TM, Landsat-7 ETM+, SPOT 5, aerial views, agro meteorological data, cartographic data (GIS), data investigation reports, etc. Because of images various origins, we conducted images pretreatment that essentially consisted in image reflectance calibration. This operation appears to be indispensable when working with images from coming different sensors. Classification methods that we used are: a maximum likelihood classification, then a decision tree classification applied to images for which vegetation index (NDVI) has been calculated. The later classification method has been introduced in order to permit a better discrimination between natural vegetation and crops which can often react in similar spectral ranges. This method is based on threshold detection of vegetation classes. Classification methods used allowed us to estimate until a certain point irrigated surfaces, without having, however, a finer information. With 30 m spatial resolution images covering a survey zone with "reduced" to "mean" agricultural lands size, it is sometimes enough difficult to discern natural vegetation pixels from crop pixels. So, we should have considered mixed classes of pixels that strongly skewed our final results. The overall accuracy of our classifications are between 70% and 90%, with Kappa coefficients between 0.4 and 0.85. These Kappa coefficients our results between "tolerable" and "good". However, our evaluations seem to be near enough of those gotten by the means of hydro agricultural inventories led on the same zone. The committed mistakes remain in an interval of +/-20%. [less ▲]

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See detailDe toekomst van wijsbegeerte
Leclercq, Bruno ULg

Scientific conference (2010, January 08)

Detailed reference viewed: 10 (0 ULg)
See detailChemical ecology in forensic entomology
Dekeirsschieter, Jessica ULg; Frederickx, Christine ULg; Verheggen, François ULg et al

Scientific conference (2010, January 07)

Detailed reference viewed: 90 (14 ULg)
See detailMéthodologie de la recherche en linguistique appliquée et didactique des langues
Lucchini, Silvia ULg

Scientific conference (2010, January 06)

Detailed reference viewed: 28 (2 ULg)
See detailElèves issus de l’immigration et diversité linguistique et culturelle
Lucchini, Silvia ULg

Scientific conference (2010, January 05)

Detailed reference viewed: 11 (5 ULg)
See detailLa loi Breyne : questions choisies
Kohl, Benoît ULg

Scientific conference (2010, January)

Detailed reference viewed: 30 (9 ULg)
See detailSurface-impedance boundary conditions in dual time-domain finite-element formulations
V Sabariego, Ruth ULg

Scientific conference (2010, January)

Detailed reference viewed: 10 (2 ULg)
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See detailRecent developments in simulation, optimization and control of flexible multibody systems
Bruls, Olivier ULg

Scientific conference (2010, January)

This talk addresses some recent extensions of the finite element approach for the analysis, design and control of flexible mechanisms. A particular attention is devoted to modular simulation concepts ... [more ▼]

This talk addresses some recent extensions of the finite element approach for the analysis, design and control of flexible mechanisms. A particular attention is devoted to modular simulation concepts, advanced time integration methods, efficient sensitivity analysis and topology optimization problems. Practical applications of those techniques can be found in various fields of engineering, e.g. in automotive engineering (vehicle suspensions, powertrains), aerospace engineering (landing gears, flaps, deployable space structures), robotics, machine tools, biomechanics or biomedical instruments. Firstly, an integrated simulation approach will be presented for articulated systems composed of rigid bodies, flexible bodies, kinematic joints, actuators, sensors and control units. I will focus on some numerical aspects concerning the time integration of the equations of motion which have the structure of strongly coupled differential-algebraic equations on a Lie group. The treatment of large rotation variables and the coupling between control state variables and mechanical generalized coordinates will be discussed in more detail. Secondly, based on this simulation tool, a particular class of optimization problems in multibody dynamics will be considered, i.e. the topology optimization of structural components. Generally, topology optimization techniques use simplified quasi-static load cases to mimic the complex dynamic loadings in service. In contrast, I will present an optimization procedure which properly accounts for the actual dynamic interactions which occur during the motion of the flexible multibody system. The method relies on an efficient sensitivity analysis based on a semi-analytical direct differentiation approach. In order to illustrate the benefits of the proposed design approach, the optimization of a two degrees-of-freedom robot arm with flexible truss linkages will be analyzed. Finally, I will discuss some perspectives for the integrated control-structure optimization of multibody systems. [less ▲]

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See detailWastewater treatment: effect of antibiotics on removal efficiency and a new approach to modeling transport, transfer, and reactions
Potier, Olivier; Louvet, Jean-Noël ULg; Le Moullec, Yann et al

Scientific conference (2010)

Detailed reference viewed: 21 (4 ULg)
See detailMusique et expression politique des minorités ethniques et raciales
Martiniello, Marco ULg

Scientific conference (2010)

Detailed reference viewed: 24 (5 ULg)
See detailRecollection and familiarity memory processes in probable Alzheimer's disease: an fMRI study
Genon, Sarah ULg; Salmon, Eric ULg; Collette, Fabienne ULg et al

Scientific conference (2010)

Cerebral activity associated with recollection and familiarity in 28 patients with Alzheimer’s disease (AD) and 17 healthy controls was directly measured in an event-related fMRI experiment during ... [more ▼]

Cerebral activity associated with recollection and familiarity in 28 patients with Alzheimer’s disease (AD) and 17 healthy controls was directly measured in an event-related fMRI experiment during performance of a recognition memory task with the process dissociation procedure. Brain regions associated to recollection were evidenced by contrasting activations for inclusion and exclusion conditions whereas brain regions related to familiarity were explored with the mean effect of the two conditions (at P < .05 corrected). Twelve patients had null recollection estimates (AD-), whereas 16 patients did experience some recollection although significantly less than controls (AD+). In AD+ and controls, recollection activated the posterior cingulate cortex (PCC). In contrast, familiarity estimates were equivalent in the 3 groups and were associated with brain activations around the intraparietal sulcus (IPS). Thus, in AD, impaired recollection is related to damage of the PCC whereas preserved familiarity is supported by the IPS. [less ▲]

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See detailMicrobial bioprocesses : current state and future prospect
Delvigne, Frank ULg

Scientific conference (2010)

Detailed reference viewed: 13 (1 ULg)
See detailPrehistoric art analysis, from the laboratory to in-situ measurement
Beck, Lucile; Menu, Michel; Laval, Eric et al

Scientific conference (2010)

Detailed reference viewed: 9 (1 ULg)
See detailInteractions between Prolactin/Growth Hormone-Derived Peptides and PAI-1
D'Amico, Salvino ULg

Scientific conference (2010)

Detailed reference viewed: 5 (2 ULg)
See detailGranulomatous reaction pattern in inflammatory diseases of the skin
QUATRESOOZ, Pascale ULg

Scientific conference (2010)

Detailed reference viewed: 7 (0 ULg)
See detailComplexity of a polyphenism: Facultative paedomorphosis in newts and salamanders
Denoël, Mathieu ULg

Scientific conference (2010)

Detailed reference viewed: 15 (3 ULg)
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See detailL’évaluation des étudiants : vers une approche praxéologique
Detroz, Pascal ULg

Scientific conference (2010)

Detailed reference viewed: 12 (2 ULg)
See detailFunctional organization of the nucleolus in eucaryotic cells
Thiry, Marc ULg

Scientific conference (2010)

Detailed reference viewed: 9 (2 ULg)
See detailClassification et partitionnement de textes : l'approche topologique
Longrée, Dominique ULg

Scientific conference (2010)

Detailed reference viewed: 7 (0 ULg)
See detailLatin et ordre des mots : quelques règles, beaucoup d’inconnues
Longrée, Dominique ULg

Scientific conference (2010)

Detailed reference viewed: 9 (0 ULg)
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See detailDetermination of phospholipids extracted from Tsukamurella paurometabola C-924 after freeze-drying and during the subsequent storage
Coulibaly, I.; Dauphin, R. D.; Destain, Jacqueline ULg et al

Scientific conference (2010)

The total lipids of Tsukamurella paurometabola C-924 were analyzed after freeze-drying. Seven individual lipids classes were identifiednamelyneutrallipids(NLs),fattyacids(FAs),phospholipids(PLs ... [more ▼]

The total lipids of Tsukamurella paurometabola C-924 were analyzed after freeze-drying. Seven individual lipids classes were identifiednamelyneutrallipids(NLs),fattyacids(FAs),phospholipids(PLs),sterolester(SEs),triglycerides(TGs),diglycerides (DGs) and monoglycerides (MGs). The principal fatty acids identified in most lipid classes were palmitic (C 16:0), palmitoleic (C 16:1), oleic (C 18:1), linoleic (C 18:2), and linolenic (C 18:3). PLs were the major constituents and accounted for 50-60% of the total lipids. PLs were fractionated. PLs of Tsukamurella paurometabola content phosphatidic acid (PA), phosphatidylethanolamine (PE), phosphatidylinositol (PI), phosphatidylcholine (PC), sphingomyelin (SM), lysophosphatidylcholine (LPC) and phosphatidylglycerol (PG). It was observed that PG had the highest proportion at most points relative to other PLs and was the predominant component of PLs (30%-56%). Evolution of individual rate was followed during storage at 20°C and 40°C with or without lithothamne400®, respectively. [less ▲]

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See detailHydrolysis of starch by sorghum malt for maltodextrin production
Ba, K.; Destain, Jacqueline ULg; Thonart, Philippe ULg

Scientific conference (2010)

Maltodextrin is a mixture of saccharides with a molecular weight between polysaccharides and oligosaccharides with DE lower than 20. Maltodextrin is more soluble in water than native starches, also is ... [more ▼]

Maltodextrin is a mixture of saccharides with a molecular weight between polysaccharides and oligosaccharides with DE lower than 20. Maltodextrin is more soluble in water than native starches, also is cheaper in comparison with other major edible hydrocolloids. Maltodextrin is obtained by moderate enzymatic or acidic hydrolysis of starch. The hydrolysis of starch, catalyzed by amylases, is the most important commercial enzyme process. The hydrolyzed products are widely applied in food, paper and textile industries. Because of the increasing demand for these enzymes in various industries, there is enormous interest in developing enzymes with better properties, such as raw starch-degrading amylases suitable for industrial applications and their cost-effective production techniques. Sorghum (Sorghum bicolor) is a widely grown crop in Africa. Obtaining enzymes from sorghum requires a transformation. The objective of this study was application of sorghum amylase for maltodextrin. Sorghum seeds were supplied by the ISRA (Bambey, Senegal). Seeds were germinated in the laboratory at 30°C for 72 h and the sorghum malt was dried at 40°C for 48 h. Corn starch (from Roquette, France) hydrolysis was assayed in a bioreactor of 2 l at a temperature of 65°C gently stirred. Raw starch was slurried in water (30% w/v) and sorghum malt was introduced, chloride calcium was added, pH was adjusted to 6. Maltodextrin was characterized in term of the dextrose equivalent (DE) during the hydrolysis. The yield of hydrolysis was evaluated by soluble solids (° BRIX) at different hydrolysis time. The glucose concentration released was measured by DNS method (Miller method). [less ▲]

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See detailActivités de recherche du laboratoire de Chimie Analytique
Ziemons, Eric ULg; Hubert, Philippe ULg

Scientific conference (2010)

Detailed reference viewed: 76 (21 ULg)
See detailLa théorie du complot
Jamin, Jérôme ULg

Scientific conference (2010)

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See detailConsciousness and disorders of consciousness
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