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See detailGrowth monitoring of Listeria monocytogenes and Salmonella spp. according to the packaging technique in pork minced meat
Adolphe, Y.; Delhalle, L.; Jasick, A. et al

Poster (2010, August)

A high level of protection of public health is one of the fundamental objectives of European food laws, as laid down in Regulation (EC) No 2073/2005. Listeria monocytogenes is a pathogen found within the ... [more ▼]

A high level of protection of public health is one of the fundamental objectives of European food laws, as laid down in Regulation (EC) No 2073/2005. Listeria monocytogenes is a pathogen found within the food-processing industries, mainly brought by human, and was responsible of 1,381 confirmed cases of foodborne listeriosis for 2008 in Europe. Salmonella was in 2008, the second most often reported zoonotic disease in humans, and 131,468 confirmed cases of human salmonellosis were reported in Europe. The aim of the present work was to develop and to validate a quicker and more sensitive genetic method for quantification of L. monocytogenes and Salmonella spp. in meat products by the quantitative real-time PCR. After preliminary tests for primers and probes choice, the genetic method was validated with classical microbial methods (ISO 11290-2:1998, ISO 6579) using challenge tests. A mixture of 3 strains was realized for each bacterial genus: 1 referee strain (L. monocytogenesT NTCT 11994 or S. TyphimuriumT ATCC 14028) and 2 lab isolates. Experiments were carried out on pork's irradiated and not irradiated minced meat. These meats were packaged either in expanded polystyrene trays wrapped with permeable stretch film or under modified atmosphere (70% O2/30% CO2) in sealed trays. The initial inoculum (102 cfu.g-1) was homogenized in minced meat before packaging in trays. They were incubated for 14 days, at +5, +8 and +10°C and at +10 and +12°C, for respectively L. monocytogenes and Salmonella spp. In the 2 tested meats, growth speeds as well as the final populations increased according to the temperature. In the not irradiated minced meat, growth speeds of the pathogenic flora as well as the associated final populations were lower than those observed in the irradiated matrices. As soon as the total flora reached its stable growth phase, growths of the various pathogenic stagnated. The growth of the original flora inhibited partially the growth of pathogens inoculated. Generally, growth of the total flora is partially inhibited by modified atmosphere packaging. The analytical methods of molecular biology allow faster and less heavy analyses, in terms of hand of work and execution, than the methods of classic microbiology. [less ▲]

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See detailLa problématique des langues étrangères dans les opuscules de Lucien et la conscience linguistique des Grecs
Rochette, Bruno ULiege

in Mestre, Francesca; Gomer, Pilar (Eds.) Lucian of Samosata. Greek Writer and Roman Citizen (2010, August)

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See detailAnnotation of Madelaine Hron's "Ora na-azu nwa: The Figure of the Child in Third-Generation Nigerian Novels"
Tunca, Daria ULiege

in Routledge Annotated Bibliography of English Studies (2010)

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See detailAnnotation of Antony Johae's "Wole Soyinka's 'Hamlet': The Rotten State of Denmark Revisited"
Tunca, Daria ULiege

in Routledge Annotated Bibliography of English Studies (2010)

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See detailGreenland [in "State of the Climate in 2009"]
Box, J.; Bhattacharya, I.; Cappelen, J. et al

in Bulletin of the American Meteorological Society (2010), 91(6), 121-124

The summer minimum ice extent in the Arctic was the third-lowest recorded since 1979. The 2008/09 boreal snow cover season marked a continuation of relatively shorter snow seasons, due primarily to an ... [more ▼]

The summer minimum ice extent in the Arctic was the third-lowest recorded since 1979. The 2008/09 boreal snow cover season marked a continuation of relatively shorter snow seasons, due primarily to an early disappearance of snow cover in spring. Preliminary data indicate a high probability that 2009 will be the 19th consecutive year that glaciers have lost mass. Below normal precipitation led the 34 widest marine terminating glaciers in Greenland to lose 101 km2 ice area in 2009, within an annual loss rate of 106 km2 over the past decade. Observations show a general increase in permafrost temperatures during the last several decades in Alaska, northwest Canada, Siberia, and Northern Europe. Changes in the timing of tundra green-up and senescence are also occurring, with earlier green-up in the High Arctic and a shift to a longer green season in fall in the Low Arctic. [less ▲]

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See detailLa dreta moderada guanya les eleccions presidencials a Polònia
Natorski, Michal ULiege

Article for general public (2010)

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See detailStudying on pig manure treatment to minimize environmental pollution and Use Bioenergy
Nguyen Van Duy, ULiege; Vu Dinh, Ton

in International journal of environmental and rural development (2010), 1(2), 73-77

This research was carried out on a pig farm in the HUNG YEN Province of Vietnam from October 2008 to August 2009. The farm had 36 sows, selling about 1.5 tons of weaned piglets and 33 tons of live weight ... [more ▼]

This research was carried out on a pig farm in the HUNG YEN Province of Vietnam from October 2008 to August 2009. The farm had 36 sows, selling about 1.5 tons of weaned piglets and 33 tons of live weight pigs per year. The piglets (from weaning to 15 kg) consumed on average 0.42 kg of feed/head/day and produced on average 0.25 kg of solid waste/day. The ratio of solid waste to feed consumed was 0.59. Pigs (from 15 to 30 kg) consumed on average 0.76 kg of feed/head/day, and the ratio of solid waste to feed consumed was 0.61. Growing pigs consumed 1.64 kg of feed/head/day and the ratio of solid waste to feed consumed was 0.49. This ratio for finishing pigs (>60 kg) was 0.46 and consumed feed was 2.3 kg/head/day. For the sows, this ratio was 0.43 for all periods including gestation and lactation. Over 24 hours in winter the biogas produced was on average 4.16 m3/day in the 24m3 biodigestor. This was much less than in summer (9.06 m3/day). To create one kW electricity, 0.92 m3 of biogas was needed. Pig manure treatment by biodigestor has considerably decreased some pollutants, including BOD5 (Biological Oxygen Demand) concentration down by 77%, the COD (Chemical Oxygen Demand) concentration down by 83%, the dissolved sulphide concentrations down by 88%, the concentration of heavy metals Cu2+ down by 52%, Zn2+ down by 37%, the Cl- concentration down by 29% and NH4-N down by 52%. [less ▲]

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See detailLe minerai de fer de la Calestienne et de l'Entre-Sambre-et-Meuse
Denayer, Julien ULiege

Conference given outside the academic context (2010)

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See detailConfigurando los territorios de pueblos en aislamiento voluntario: cómo hacer participar a un público oculto?
Escobar Jimenez, Kelly ULiege

Conference (2010, July 21)

El problema que nos preocupa es la participación de las comunidades locales en los procesos de delimitación, demarcación y gestión de las áreas protegidas. Estos procesos comparten algunas características ... [more ▼]

El problema que nos preocupa es la participación de las comunidades locales en los procesos de delimitación, demarcación y gestión de las áreas protegidas. Estos procesos comparten algunas características: se relacionan la conservación biológica y la cultural, se propone el desarrollo sostenible, son procesos científicamente informados y abiertos a la participación de las poblaciones concernidas. Pero, de qué forma es posible cumplir con los objetivos de la gestión participativa, si las poblaciones concernidas de los territorios en cuestión son “pueblos en aislamiento voluntario”. Algunos Estados de América latina han creado zonas intangibles, por ejemplo, la Zona Intangible Tagaeri-Taromenane, implantada en 1999 en la Amazonía ecuatoriana. Estas iniciativas pueden ser una solución, pero han provocado a su vez preguntas como: ¿quién debe respetar los límites de estas zonas, la sociedad nacional y/o los “pueblos ocultos”, que los desconocen por completo? El caso del Ecuador y sus pueblos en aislamiento voluntario se replica en varios países que confluyen en la Amazonía y el Gran Chaco. Frente a este problema, los científicos (geógrafos, antropólogos, ingenieros, etc.) y los movimientos indígenas (la CONAIE en El Ecuador, por ejemplo) tienden a convertirse en representantes de los “silenciosos pueblos”. En este contexto, el argumento es que en la configuración de los territorios de pueblos en aislamiento, los científicos y los movimientos indígenas compiten por ser representantes legítimos de los “pueblos ocultos”. De un punto de vista metodológico, analizamos la acumulación progresiva de conocimientos sobre los pueblos en aislamiento voluntario. Esto lo hacemos a partir del primer Encuentro Internacional sobre los Pueblos Indígenas Aislados de la Amazonía y el Gran Chaco (2005), y de las comunicaciones y redes que se han producido en consecuencia. Movilizamos la sociología de la traducción (Actor Network Theory), para comprender cómo se estabiliza la identidad de territorios y de seres humanos en medio de negociaciones y conflictos entre el “mundo científico” y el “mundo indigenista”. Concluimos, por una parte, que los mundos “científico” e “indigenista” movilizan útiles de naturaleza similar para representar los territorios y los pueblos ocultos: narraciones, fotografías, huellas y “trofeos de guerra” (lanzas, por ejemplo). Sin embargo, durante esta “competencia” se construye, a múltiples niveles, la identidad de todas las entidades que entran en juego, incluyendo la de los científicos e indigenistas mismos [less ▲]

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See detailA Full Discontinuous Galerkin Formulation Of Euler Bernoulli Beams In Linear Elasticity With Fractured Mechanic Applications
Becker, Gauthier ULiege; Noels, Ludovic ULiege

Conference (2010, July 21)

A full discontinuous Galerkin method is used to predict the fracture of beams thanks to insertion of an extrinsic cohesive element. In fact, The formulation developed originally by G. Wells etal. to ... [more ▼]

A full discontinuous Galerkin method is used to predict the fracture of beams thanks to insertion of an extrinsic cohesive element. In fact, The formulation developed originally by G. Wells etal. to guarantee weakly the high order derivatives of plates with only displacement field unknown and extended by L. Noels etal. for shells is derived for beam with full discontinuous elements. This new formulation can be advantageously combined, as shown first by J. Mergheim etal. , with an extrinsic cohesive approach as there is no need to modify dynamically the mesh, which is the major drawback of this approach. The pre-fractured stage is modeled by full discontinuous elements in a manner which is proved stable and consistent and the fracture is modeled by a cohesive law applied on stress resultant an stress couple defined by J.C. Simo etal. The suggested study produces two type of results. On one hand, it is shown analytically and verified by numerical examples that the presented framework has got the properties of consistency and convergence expected for a numerical scheme. On the other hand, it is proved by some test cases that the energy released during fracture process is equal to the fracture energy except in the case where the difference of internal energy between not fractured and fractured configurations is bigger than the fracture energy. In this case, the fracture occurs in one time step. The presented work proposed a novel interesting manner to take into account fracture in thin bodies. The verification made on the particularized case of beams suggested great perspectives for plates and shells which allow to simulate more complex problems. [less ▲]

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See detailNel garage della mia esistenza c'è un'Italia psichedelica che ha i colori degli anni '80
Curreri, Luciano ULiege

Article for general public (2010)

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See detailRole of Keratinocytes GPR109A and COX-2 in Nicotinic Acid and Mono-methyl Fumarate Induced Flushing
Hanson, Julien ULiege; Gille, Andreas; Zwykiel, Sabrina et al

Poster (2010, July 17)

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See detailCold DUst around NEarby Stars (DUNES). First results. A resolved exo-Kuiper belt around the solar-like star ζ2 Ret
Eiroa, C.; Fedele, D.; Maldonado, J. et al

in Astronomy and Astrophysics (2010), 518

We present the first far-IR observations of the solar-type stars δ Pav, HR 8501, 51 Peg and ζ2 Ret, taken within the context of the DUNES Herschel open time key programme (OTKP). This project uses the ... [more ▼]

We present the first far-IR observations of the solar-type stars δ Pav, HR 8501, 51 Peg and ζ2 Ret, taken within the context of the DUNES Herschel open time key programme (OTKP). This project uses the PACS and SPIRE instruments with the objective of studying infrared excesses due to exo-Kuiper belts around nearby solar-type stars. The observed 100 μm fluxes from δ Pav, HR 8501, and 51 Peg agree with the predicted photospheric fluxes, excluding debris disks brighter than Ldust/ ~ 5 × 10-7 (1σ level) around those stars. A flattened, disk-like structure with a semi-major axis of ~100 AU in size is detected around ζ2 Ret. The resolved structure suggests the presence of an eccentric dust ring, which we interpret as an exo-Kuiper belt with Ldust/ ≈ 10-5. [less ▲]

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See detailResolving the cold debris disc around a planet-hosting star. PACS photometric imaging observations of q1 Eridani (HD 10647, HR 506)
Liseau, R.; Eiroa, C.; Fedele, D. et al

in Astronomy and Astrophysics (2010), 518

Context. About two dozen exo-solar debris systems have been spatially resolved. These debris discs commonly display a variety of structural features such as clumps, rings, belts, excentric distributions ... [more ▼]

Context. About two dozen exo-solar debris systems have been spatially resolved. These debris discs commonly display a variety of structural features such as clumps, rings, belts, excentric distributions and spiral patterns. In most cases, these features are believed to be formed, shaped and maintained by the dynamical influence of planets orbiting the host stars. In very few cases has the presence of the dynamically important planet(s) been inferred from direct observation. Aims. The solar-type star q1 Eri is known to be surrounded by debris, extended on scales of 30”. The star is also known to host at least one planet, albeit on an orbit far too small to make it responsible for structures at distances of tens to hundreds of AU. The aim of the present investigation is twofold: to determine the optical and material properties of the debris and to infer the spatial distribution of the dust, which may hint at the presence of additional planets. Methods. The Photodetector Array Camera and Spectrometer (PACS) aboard the Herschel Space Observatory allows imaging observations in the far infrared at unprecedented resolution, i.e. at better than 6” to 12” over the wavelength range of 60 μm to 210 μm. Together with the results from ground-based observations, these spatially resolved data can be modelled to determine the nature of the debris and its evolution more reliably than what would be possible from unresolved data alone. Results. For the first time has the q1 Eri disc been resolved at far infrared wavelengths. The PACS observations at 70 μm, 100 μm and 160 μm reveal an oval image showing a disc-like structure in all bands, the size of which increases with wavelength. Assuming a circular shape yields the inclination of its equatorial plane with respect to that of the sky, i > 53°. The results of image de-convolution indicate that i likely is larger than 63°, where 90° corresponds to an edge-on disc. Conclusions. The observed emission is thermal and optically thin. The resolved data are consistent with debris at temperatures below 30 K at radii larger than 120 AU. From image de-convolution, we find that q1 Eri is surrounded by an about 40 AU wide ring at the radial distance of ~85 AU. This is the first real Edgeworth-Kuiper Belt analogue ever observed. [less ▲]

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See detailQuasi-Elastic Production at Hadronic Colliders
Dechambre, Alice ULiege

Doctoral thesis (2010)

Quasi-elastic production is usually viewed as a golden signal for the detection of objects such as the Higgs boson(s) or exotic particles and this is due to the very clean final state and the lack of ... [more ▼]

Quasi-elastic production is usually viewed as a golden signal for the detection of objects such as the Higgs boson(s) or exotic particles and this is due to the very clean final state and the lack of hadronic remnants after the interaction. In view of the recent data from CDF Run II, we critically re-evaluated the standard approach to the calculation of quasi-elastic cross sections in the high-energy limit and evaluated the uncertainties that affect this kind of process. The main idea of this work was to understand the various ingredients that enter the calculation and the uncertainties coming from each of them. We studied and narrowed down these uncertainties using available data on dijets quasi-elastic event at the TeVatron. All the arguments developed apply to high-mass central systems and lead to a prediction of the Higgs quasi-elastic cross section at the LHC energies. [less ▲]

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See detailPrediction of individual methane emission by dairy cattle from mid-infrared spectra
Vanlierde, Amélie ULiege; Delfosse, Camille; Dehareng, Frédéric et al

Conference (2010, July 14)

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See detailFacing the problem of the bis(acetylacetonato)cobalt(II)-mediated radical polymerization of acrylates
Hurtgen, Marie ULiege; Debuigne, Antoine ULiege; Jérôme, Christine ULiege et al

Poster (2010, July 13)

Cobalt-Mediated Radical Polymerization (CMRP) is an efficient tool for polymerizing acrylates and vinyl esters. However, a challenge in CMRP remains in controlling the polymerization of both types of ... [more ▼]

Cobalt-Mediated Radical Polymerization (CMRP) is an efficient tool for polymerizing acrylates and vinyl esters. However, a challenge in CMRP remains in controlling the polymerization of both types of monomers with the same cobalt complex. Here, we show how Co(acac)2, efficient for unconjugated vinyl monomers, can also cope with acrylates. [less ▲]

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