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See detailEnhanced biomass production of a novel Acetobacter strain isolated from Moroccan biotopes using response surface methodology approach
Mounir, Majid ULg; Hamas, Khadija; Tamraoui, Khadija et al

Conference (2016, March 21)

The objective of this work was first the isolation of novel acetic acid bacteria strains from natural Moroccan habitats, and then, the evaluation of their ability to produce microbial starters for vinegar ... [more ▼]

The objective of this work was first the isolation of novel acetic acid bacteria strains from natural Moroccan habitats, and then, the evaluation of their ability to produce microbial starters for vinegar production in large-scale. The isolation was made from figs, dates, cactus, and traditional fruit vinegars. Four strains, selected from a total of 63 isolates were confirmed to be belonged to Acetobacter species according to biochemical tests and molecular study based on 16s rDNA sequence analysis. Acetic acid fermentation tests, performed on date and apple fermented juices by the selected Acetobacter strains, showed high capacity of acidification. The most efficient strain, isolated from cactus vinegar, yielded an acidity of about 42.5 g/L on apple juice. A cell growth optimization was carried out on the most efficient strain using the response surface methodology (RSM). The linear, quadratic and interaction effects of four factors; ethanol, acetic acid, glucose and pH were studied by the application of a central composite design. 30 experiments were designed to predict the maximum concentration of cell biomass. The optimal calculated values of ethanol, acetic acid, glucose and pH allowing the prediction of the maximum biomass production (2.2 g/L) were 28.18 g/L, 10.12 g/L, 15.15 g/L and 5.33, respectively. Subsequently, further batch fermentations were carried out in a 6 L lab-bioreactor using the optimased culture medium. The results were in line with the predict values. It was concluded that the studied strain is well suited to be used as parental strain to prepare a starter for vinegar fruit production. [less ▲]

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See detailDéfis et opportunités des outils de découverte : côté professionnel, côté usager
Decoster, Sara ULg; Renaville, François ULg

Conference given outside the academic context (2016)

Detailed reference viewed: 147 (11 ULg)
See detailLe redoublement en Fédération Wallonie-Bruxelles
Baye, Ariane ULg

Conference given outside the academic context (2016)

Detailed reference viewed: 8 (0 ULg)
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See detailThe many aurorae on Jupiter: an overview of recent results
Bonfond, Bertrand ULg

Scientific conference (2016, March 21)

The Hubble Space Telescope's high resolution observations of the Jovian aurorae in the UV domain have provided us with a wealth of new information in the recent years. Not only do we have now access to ... [more ▼]

The Hubble Space Telescope's high resolution observations of the Jovian aurorae in the UV domain have provided us with a wealth of new information in the recent years. Not only do we have now access to details down to a couple hundreds kilometers, but we can also analyze changes on timescales of tens of seconds. These images and spectra have taught us that the aurorae are made of many different features, each of them associated with a different process in the Jovian magnetosphere. This magnetosphere significantly differs from the Earth's one, being dominated by the rapid rotation of Jupiter and the plasma originating from Io's volcanism. The satellite footprints are the auroral signature of the electro-magnetic interaction between the Galilean moons and the magnetospheric plasma rotating around Jupiter. In the case of Io, Europa and Ganymede, this signature takes the form of a chain of spots followed by an elongated tail of emission. The tentative identification of a Callisto footprint will also be discussed. Poleward of Io's footprint, patches of emission of various sizes have been associated with injections of hot coming from the outer magnetosphere into the middle magnetosphere. These spots ares thus important markers of the plasma circulation in the Jovian magetnosphere. In the same auroral region, more diffuse emissions are associated with pitch angle scattering in the magnetospheric area where dipolar magnetic field lines become elongated. The most striking feature of the Jovian aurorae is the main emission. This structure sometimes appears as a continuous auroral oval, but it can also display much more complex patterns, especially on the dusk side. Moreover, the brightness strongly changes with local time, as a response to the variability of the corotation enforcement currents and the partial ring currents in the middle magnetosphere. Directly poleward of the main emission, patches regularly appear on the night and dawn sides, in a region generally devoid of any emissions (the polar dark region). Such patches are thought to be a signature of the reconnection process that allows the release of the plasma coming from Io into the magnetotail. The dusk side of the area enclosed in the main emission, called the active region, is the locus of intense and transient (sometimes, even quasi-periodic) flares as well as more stable arcs and diffuse patches. Poleward of this area, stable filaments can sometimes be seen along the noon to midnight axis. Finally, the polar-most region, tentatively associated with open field lines, display rapidly fluctuating patches of emissions. All these polar emissions are very poorly understood and will thus be the subject of fascinating investigations from the Juno spacecraft, arriving around Jupiter on July 4th. [less ▲]

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See detailDe l’art du mouvement : Pour une chorégraphie du cinéma
Tomasovic, Dick ULg

Scientific conference (2016, March 21)

La danse et le cinéma sont proches par leur souci constant de l’organisation du temps et du mouvement. Ils n’ont d’ailleurs cessé de dialoguer tout au long du vingtième siècle. Dès les premières danses ... [more ▼]

La danse et le cinéma sont proches par leur souci constant de l’organisation du temps et du mouvement. Ils n’ont d’ailleurs cessé de dialoguer tout au long du vingtième siècle. Dès les premières danses serpentines captées par les caméras Lumière et Edison en 1895, le filmage du corps du danseur devient un enjeu important. La rencontre du cinématographe et de la chorégraphie permet en effet de nouvelles formes d'agencement des corps et d’audacieuses figures de mouvements. En somme, lorsque la danse et le cinéma se rencontrent, on assiste à la réinvention du geste, de la représentation corporelle et du mouvement lui-même, ce que l’on verra à travers les exemples donnés par quelques maitres du ballet et du cinéma, comme Fred Astaire, Gene Kelly, Wong Kar-wai ou Quentin Tarantino. [less ▲]

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See detailEstimating carbon fluxes in a Posidonia oceanica system: Paradox of the bacterial carbon demand
Velimirov, Branko; Lejeune, Pierre; Kirschner, A. et al

in Estuarine Coastal & Shelf Science (2016), 171

A mass balance ecosystemic approach, based on bacterial carbon demands and primary production data, was used to investigate if the bacterial community (freewater bacterioplankton and benthic bacteria of ... [more ▼]

A mass balance ecosystemic approach, based on bacterial carbon demands and primary production data, was used to investigate if the bacterial community (freewater bacterioplankton and benthic bacteria of the oxygenated sediment layer) could be sustained by the main primary producers (Posidonia oceanica and its epiphytes, adjacent macroalgae and phytoplankton communities; hereafter called the P. oceanica system) of a non-eutrophic Mediterranean bay. Unexpectedly, the findings of this study differed from previous works that used benthic incubation chamber and O2 optode methods. In this study, data were grouped in two categories, corresponding to two time periods, according to the seawater temperature regime (<18 °C or >18 °C): from May to October and from November to April. Between May and October, the produced benthic macrophyte tissues could not provide the carbon required by the bacteria of the oxygenated sediment layer, showing that the balance production of the investigated bay was clearly heterotrophic (i.e. negative) during this time period. In contrast, between November and April, benthic bacteria respiration nearly equated to carbon production. When integrating the open water carbon dynamics above the meadow in the model, a negative carbon balance was still observed between May and October, while a slight carbon excess was noticed between November and April. In the light of these findings, the carbon balance being negative on an annual basis, alternative carbon sources are required for the maintenance of the bacterial carbon production. [less ▲]

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See detail“Rhythm and Repetition in Caryl Phillips’s Dancing in the Dark”
Mascoli, Giulia ULg

Conference (2016, March 20)

My proposal is to deal with Dancing in the Dark (London: Vintage, 2005), a novel by Caryl Phillips, a contemporary British author of Caribbean descent. This narrative is devoted to the Caribbean American ... [more ▼]

My proposal is to deal with Dancing in the Dark (London: Vintage, 2005), a novel by Caryl Phillips, a contemporary British author of Caribbean descent. This narrative is devoted to the Caribbean American entertainer Bert Williams (1874–1922) who was the first black performer in the Ziegfield Follies and it traces his frustrating life as a black performer who had to blackface. Like most of Phillips’s literary production, Dancing in the Dark is shaped by music, both thematically –there are scenes involving musical performances, lyrics interspersed throughout the novel– and formally through the recurrent and creative use of repetitions and meaningful variations in rhythm, and sonic effects. Indeed, various elements of sound are present through poetic language and forms to emphasize elements of rhythm: repetitive devices such as rhymes, meters and alliterations. My contention is that these rhythmic devices partake in the emotional impact of Phillips’s writing; sonic elements emphasize the musical properties of language, strike the reader and prevent them from forgetting the traumatic experience of Bert. Through repetition, they transfer the character’s traumatic experience into the writing and create a sense of sympathy with the reader which privileges immediate empathy. If Bert Williams has been largely forgotten until recently, I believe that Phillips’s rhythmic prose will enable Bert’s story to resonate in the reader’s mind long after closing the book. [less ▲]

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See detailThérapeutiques conservatrices des tendinopathies : quoi de neuf ?
Kaux, Jean-François ULg

in 11ème Congrès d'actualités diagnostiques, éthiques et thérapeutiques de l'arrondissement de Dinant (2016, March 19)

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See detailGoro Gheri as the "perfect secretary"?
Miesse, Hélène ULg

Conference (2016, March 19)

Detailed reference viewed: 23 (0 ULg)
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See detailClinical and molecular classification of glioblastoma patients
Lambert, Jérémy ULg; Kaoma, Tony; Van Dyck, Eric et al

Poster (2016, March 19)

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See detailLes PCSK9 : la mort des statines ?
RADERMECKER, Régis ULg

Conference (2016, March 19)

Detailed reference viewed: 30 (5 ULg)
Peer Reviewed
See detailThe Islamic coinage of Barqa from the conquest up to the advent of the Fatimids
Bauden, Frédéric ULg

Conference (2016, March 19)

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See detailLes pays émergents : vecteur de sécurité alimentaire en Afrique ? le cas du Brésil au Mozambique
WCusson, Gabrielle ULg

Conference (2016, March 19)

Cette communication a pour objectif d’analyser le rôle des pays émergents dans la coopération agricole en Afrique pour assurer la sécurité alimentaire et énergétique du continent, et plus particulièrement ... [more ▼]

Cette communication a pour objectif d’analyser le rôle des pays émergents dans la coopération agricole en Afrique pour assurer la sécurité alimentaire et énergétique du continent, et plus particulièrement celui du Brésil au Mozambique. Parmi les pays émergents, la Chine, l’Inde et le Brésil s’affichent dorénavant comme des puissances agricoles à l’échelle internationale et détiennent une expertise particulière qu’ils souhaitent partager avec l’Afrique afin de soutenir sa révolution agraire et son insertion au marché mondial. Cependant, cette coopération Sud-Sud (CSS) ne semble pas exempte de bénéfices politiques et commerciaux à l’égard des pays donateurs. Ainsi, les pays émergents proposent-ils un modèle de coopération et de développement différent et solidaire ou reproduisent-ils la structure d’aide traditionnelle Nord-Sud soutenue par les institutions financières internationales? Quels sont les intérêts des puissances émergentes à participer à la nouvelle révolution verte en Afrique ? Plus précisément, cette analyse portera sur la stratégie de CSS du Brésil au Mozambique via le projet ProSAVANA, un projet de coopération triangulaire développé avec le Japon qui vise le transfert du savoir-faire technique et technologique agraire du Brésil dans les savanes africaines à des fins de production de biocarburants; un enjeu clé pour le Brésil. Pour répondre à la question de recherche, nous confronterons le discours officiel du Brésil en terme de CSS avec la réalité qui se dessine au Mozambique. Pour ce faire, nous nous appuierons sur les théories critiques de la nouvelle économie politique. [less ▲]

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See detailUnderstanding Usage Behaviour in a Peer-to-Peer Task Community
Deliège, Fanny ULg; Ates, Zelal ULg; Benoit, Sabine et al

Scientific conference (2016, March 18)

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See detailProcedural learning as a measure of functional impairment in a mouse model of ischemic stroke
Linden, Jérôme ULg; Van de Beek, Lise; Plumier, Jean-Christophe ULg et al

in Behavioural Brain Research (2016), 307

Basal ganglia stroke is often associated with functional deficits in patients, including difficulties to learn and execute new motor skills (procedural learning). To measure procedural learning in a ... [more ▼]

Basal ganglia stroke is often associated with functional deficits in patients, including difficulties to learn and execute new motor skills (procedural learning). To measure procedural learning in a murine model of stroke (30min. right MCAO), we submitted C57Bl/6J mice to various sensorimotor tests, then to an operant procedure (Serial Order Learning) specifically assessing the ability to learn a simple motor sequence. Results showed that MCAO affected the performance in some of the sensorimotor tests (accelerated rotating rod and amphetamine rotation test) and the way animals learned a motor sequence. The later finding seems to be caused by difficulties regarding the chunking of operant actions into a coherent motor sequence; the appeal for food rewards and ability to press levers appeared unaffected by MCAO. We conclude that assessment of motor learning in rodent models of stroke might improve the translational value of such models. [less ▲]

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See detail"L'Afrique du Nord, relais d'influence pour la Turquie »
Bayramzadeh, Kamal ULg

Scientific conference (2016, March 18)

Detailed reference viewed: 36 (2 ULg)