Cat is a major allergen in patients with asthma from west Siberia, Russia

in Allergy (2006), 61(4), 509-510

Le Goût du mort. Mauvais goût et limites du spectateur

Conference (2006, November 17)

Familial Pituitary Adenomas (Lettura Magistrale)

Scientific conference (2006, November 17)

Contribution technologique à l'élaboration de produits alimentaires "trans-free". Comportement thermique de mélanges binaires.

Poster (2006, November 17)

Les outils neuropsychologiques sensibles pour le diagnostic de la maladie d'Alzheimer

Conference given outside the academic context (2006)

Inhibitory activity of lactobacillus curvatus CWBI-B28 against Listeria monocytogenes and ST2-verotoxin producing Escherichia coli O157

in African Journal of Biotechnology (2006), 5(22), 2303-2306

A bacteriocin- producing strain of Lactobacillus curvatus CWBI- B28 isolated from raw meat was shown to inhibit Listeria monocytogenes and pathogenic strains of Escherichia coli by the well diffusion ... [more ▼]

A bacteriocin- producing strain of Lactobacillus curvatus CWBI- B28 isolated from raw meat was shown to inhibit Listeria monocytogenes and pathogenic strains of Escherichia coli by the well diffusion assay. To confirm whether the bacteriocin was involved in E. coli O157 inhibition, growth of the pathogen was monitored in the neutralized cell- free supernatant ( NCFS) pre- treated with pronase E or catalase. Alternatively, E. coli O157 ( VH21) was co- cultured with Lb. curvatus CWBI- B28 in MRS broth. The results of the well- diffusion assay suggested that the inhibition of E. coli O157 ( VH21) was partially due to the bacteriocin; however, growth monitoring indicated that such inhibition is exclusively due to hydrogen peroxide. In pronase- added NCFS ( i. e., absence of bacteriocin) the colony forming units ( cfus) of E. coli O157 ( VHA21) declined to below the detectable limit after 24 h of incubation at 37 C. However, in presence of catalase no inhibition of the pathogen was observed and the cfus increased steadily to reach 8 log units in 24 h. Moreover, in co- culture, a significantly accelerated inhibition of E. coli O157 ( VH21) was observed in MRS broth as compared to the NCFS without added catalase and the cfus decreased to below the detectable limit in 8 h instead of 24 h, respectively. [less ▲]

Magma chamber processes in the Tellnes ilmenite deposit (Rogaland Anorthosite Province, SW Norway) and the formation of Fe-Ti ores in massif-type anorthosites

in Chemical Geology (2006), 234(3-4), 264-290

The origin of igneous Fe-Ti oxide ores associated with massif-type anorthosites is investigated through a detailed study of the world-class Tellnes ilmenite deposit, part of the late-Proterozoic (930-920 ... [more ▼]

The origin of igneous Fe-Ti oxide ores associated with massif-type anorthosites is investigated through a detailed study of the world-class Tellnes ilmenite deposit, part of the late-Proterozoic (930-920 Ma) AMC series of the Rogaland Anorthosite Province (SW Norway). More than 100 samples from drill cores reveal significant petrographical and compositional variations within the ore body. Four zones are defined, based on variations in modal proportions and cumulus mineral assemblages: the Lower and Upper Central Zones and the Lower and Upper Marginal Zones. Plagioclase and whole-rock compositions discriminate the zones and display patterns interpreted as a result of mixing of either plagioclase-ilmenite or plagioclase-ilmenite-orthopyroxene-olivine cumulates with a melt of ferrodioritic (jotunitic) composition with a content decreasing from 80 to 20% from the margins to the central part of the ore body. Phase diagrams for a jotunitic parental magma reproduce the crystallization sequence at 5 kb. The orthopyroxene-olivine liquidus boundary is a peritectic in the Bjerkreim-Sokndal layered intrusion and a cotectic in Tellnes and this explains the differences in the sequence of crystallization of the two intrusions. The high concentration of ilmenite, well above cotectic proportions, resulted from gravity-sorting in the Tellnes ore body, which represents the lower part of a larger magma chamber. Uniform Sr isotope ratios do not support magma mixing. The cryptic layering of the ore body precludes injection as a crystal mush but favours in situ crystallization from an evolving magma in a sill-like magma chamber. The present trough-shape and mineral orientations result from deformation during gravity-induced subsidence and by up-doming of the anorthosite. Fractional crystallization of a TiO2-rich magma with ilmenite as an early liquidus mineral and plagioclase buoyancy are the principal mechanisms responsible for the formation of Fe-Ti deposits in Proterozoic massif-type anorthosites. (c) 2006 Elsevier B.V. All rights reserved. [less ▲]

Césarienne urgente: quel délai, quelle technique? Le point de vue de l'anesthésiste-réanimatur

Conference (2006, November 15)

A scalable and decentralized fast-rerouting scheme with efficient bandwidth sharing

in Computer Networks (2006), 50(16), 3043-3063

This paper focuses on the protection of virtual circuits (Label Switched Paths, LSPs) in a (G)MPLS (Generalised Multi-Protocol Label Switching) network. The proposed algorithm is designed to protect ... [more ▼]

This paper focuses on the protection of virtual circuits (Label Switched Paths, LSPs) in a (G)MPLS (Generalised Multi-Protocol Label Switching) network. The proposed algorithm is designed to protect traffic with strong delay requirements such as EF (Expedited Forwarding) ordered aggregates in a DiffServ domain. Indeed, for this type of application, we need fast restoration in case of failure. The duplication of all the packets in a 1 + 1 end-to-end restoration scheme consumes a large amount of bandwidth. Furthermore, end-to-end recovery with bandwidth sharing schemes are usually considered to be far too slow. Local fast-rerouting is a solution which can compete with restoration times and bandwidth consumption offered by SONET self-healing rings. Our scheme includes a sophisticated resource aggregation mechanism based on the concepts of "backup-backup aggregation" and "backup-primary aggregation". The path selection algorithm is also designed to efficiently reduce the resource usage. Moreover, when considering LSPs at different preemption levels, our algorithm is able to correctly calculate the amount of bandwidth that can be preempted despite the sharing of resource. We show that our approach, though local, can compete with the state-of-the-art end-to-end recovery schemes in terms of resource consumption. The major contribution of our scheme, the "backup-primary aggregation", was then also used in the context of end-to-end recovery and improved its performance substantially. To be able to save a maximum amount of bandwidth in a decentralised implementation, the nodes that compute backup LSPs need to obtain a certain amount of link-state information. We propose a solution where the nodes learn almost all the information they need with RSVP messages. This drastically reduces the information that needs to be flooded in the whole network and is the first scalable decentralised solution capable of sharing a large amount of bandwidth. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

Uso del Inmunoblot como método diagnóstico confirmatorio de la Anemia Infecciosa Equina

Poster (2006, November 12)

USO DEL INMUNOBLOT COMO MÉTODO DIAGNÓSTICO CONFIRMATORIO DE LA ANEMIA INFECCIOSA EQUINA Immunoblotting as confirmatory diagnostic assay for Equine Infectious Anemia Alvarez Irene 1 ialvarez@cicv.inta.gov ... [more ▼]

USO DEL INMUNOBLOT COMO MÉTODO DIAGNÓSTICO CONFIRMATORIO DE LA ANEMIA INFECCIOSA EQUINA Immunoblotting as confirmatory diagnostic assay for Equine Infectious Anemia Alvarez Irene 1 ialvarez@cicv.inta.gov.ar , Vissani Aldana1, Gutierrez Gerónimo1, Rodríguez Sabrina 1, Barrandeguy María 1 y Trono Karina 1. 1Instituto de Virología – CICVyA – INTA . Las Cabañas y Los Reseros s/n. 1712. Castelar Argentina. INTRODUCCION Y OBJETIVO. La prueba de diagnóstico “Gold Standard” para la Anemia Infecciosa Equina (AIE) continúa siendo la Inmunodifusión en gel de agar (IDGA), y aunque existen ensayos de ELISA comerciales, la mayoría de los diagnósticos se realizan en la actualidad por IDGA. En ciertas ocasiones no se puede declarar el estado serológico del animal debido a la presencia de reacciones inespecíficas que no permiten obtener un resultado concluyente por IDGA o se ha obtenido una respuesta diferente cuando se analizó la misma muestra de suero por IDGA y ELISA. Con el objetivo de contar con un método de diagnóstico que permita confirmar y calificar correctamente el estado serológico referido a la AIE, se evaluó en este trabajo un ensayo de Inmunoblot diseñado en nuestro laboratorio, que utiliza como antígeno proteína viral p26 recombinante (Inmunoblot-rp26). MATERIAL Y METODO. Un panel de sueros equinos evaluado previamente por IDGA (DyaSystems EIA-AGID test kit, Idexx Laboratorios) fue analizado por Inmunoblot-rp26 utilizando proteína recombinante p26 purificada fijada a membrana de PVDF. El panel incluyó: 74 sueros de campo positivos, 95 sueros de campo negativos, 63 sueros de campo inespecíficos, 26 sueros de equinos con anticuerpos frente a otras enfermedades infecciosas y 8 con alto grado de hemólisis. Además, se evaluaron para obtener un estándar de comparación, 5 paneles de proficiencia de 12 sueros cada uno otorgados por SENASA, 1 panel de proficiencia de 20 sueros otorgado por NVSL-USA y el suero positivo débil de referencia de la OIE para Anemia Infecciosa Equina. RESULTADOS. Los resultados obtenidos con el Inmunoblot-rp26 fueron comparados con los resultados del IDGA. Los resultados discordantes fueron analizados por Inmunoblot utilizando como antígeno la proteína de fusión en la región amino-terminal de p26 (inmunoblot-pBad). Todos los sueros positivos de campo fueron detectados como positivos por Inmunoblot-p26. De un total de 95 sueros negativos por IDGA, 6 fueron declarados como positivos por Inmunoblot-p26 y su estado confirmado por Inmunoblot-pBAD. Hubo concordancia total de resultados entre Inmunoblot-rp26 e IDGA con los paneles de proficiencia provenientes de SENASA y del NVSL. El suero de referencia de la OIE reaccionó con resultado claramente positivo, a diferencia de lo que sucede con IDGA, donde reacciona como débil positivo. Ninguno de los sueros con anticuerpos frente a otras enfermedades infecciosas, como tampoco los sueros bemolizados, presentaron reacción positiva por Inmunoblot-p26. Se obtuvo un claro resultado diagnóstico al analizar los sueros declarados “inespecíficos” por IDGA, entre los cuales se pudieron observar resultados negativos y positivos. CONCLUSION. El Inmunoblot con proteína p26 recombinante se comportó como una herramienta valiosa para el diagnostico confirmatorio de la anemia infecciosa equina. [less ▲]