1000 resultados para 378.192


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Analiza la información relativa a la implementación infraestructural y las estadísticas pesqueras en el Puerto Chicama, habiéndose puesto mayor énfasis en la pesca artesanal. Se proprociona además algunas consideraciones sobre la pesquería industrial y la situación actual de la población en Puerto Chicama.

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Digital libraries (DL) have had a tremendous impact on improving the accessibility of scientific and academic publications. In developing countries, they seem to be the great hope, due to the serious existing problems with the traditional publishing and distribution mechanisms and to the potential they have on enabling access to a great panoply of publications. Moreover, accessing digital libraries over mobile devices has the potential of reaching a broader community of users and on helping to bridge the digital divide, since there are very reduced computer and Internet penetration rates in these countries, along with a higher mobile phone usage. For developed countries, accessing digital libraries on the go might also bring important added value. This paper features an analysis of the major issues related to making digital libraries accessible over mobile devices. A specific study on the possibility of using mobile digital libraries in a developing country context is also presented along with a proposal for making DSpace based digital libraries accessible over mobile phones.

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Collection : Petite bibliothèque scientifique

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[Traditions. Polynésie]

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BACKGROUND & AIMS: Genetic variation in the interleukin 28B (IL28B) gene has been associated with the response to interferon-alfa/ribavirin therapy in hepatitis C virus (HCV) genotype 1-infected patients. The importance of three IL28B single nucleotide polymorphisms (rs8099917, rs12980275 and rs12979860) for HCV genotype 2/3-infected patients is unknown. METHODS: In patients with chronic hepatitis C genotype 2/3 (n=267), IL28B host genotypes (rs8099917, rs12980275 and rs12979860) were analyzed for associations with sustained virologic response (SVR) to antiviral therapy with (pegylated) interferon-alfa and ribavirin and with respect to epidemiological, biochemical, and virological parameters. For comparison, hepatitis C genotype 1 patients (n=378) and healthy controls (n=200) were included. RESULTS: The rs12979860 CC genotype, lower age, and genotype 2 were significantly associated with SVR in HCV genotype 2/3-infected patients (p=0.01, p=0.03 and p=0.03, respectively). No association was observed for rs8099917 and rs12980275. In addition, an SVR in patients with rapid virologic response (RVR) was associated with the rs12979860 CC genotype (p=0.05), while for non-RVR no association was found. Furthermore, a significant association with a higher baseline viral load was observed for all three IL28B genotypes in genotype 1/2/3-infected patients. Finally, increasing frequencies of the rs12979860 CC genotypes were observed in genotype 1- (33.9%), genotype 3- (38.9%), and genotype 2-infected (51.9%) patients in comparison with healthy controls (49.0%) (p<0.01). CONCLUSIONS: In genotype 2/3-infected patients, rs12979860 was significantly associated with SVR. The frequency of the rs12979860 CC genotype is lower in HCV genotype 1 vs. genotype 2/3 patients. All major IL28B genotypes are associated with HCV-RNA concentration.

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Generating a diverse T cell memory population through vaccination is a promising strategy to overcome pathogen epitope variability and tolerance to tumor Ags. The effector and memory pool becomes broad in TCR diversity by recruiting high- and low-affinity T cells. We wanted to determine which factors dictate whether a memory T cell pool has a broad versus focused repertoire. We find that inflammation increases the magnitude of low- and high-affinity T cell responses equally well, arguing against a synergistic effect of TCR and inflammatory signals on T cell expansion. We dissect the differential effects of TCR signal strength and inflammation and demonstrate that they control effector T cell survival in a bim-dependent manner. Importantly, bim-dependent cell death is overcome with a high Ag dose in the context of an inflammatory environment. Our data define the framework for the generation of a broad T cell memory pool to inform future vaccine design.

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Kirje 1.11.1974

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El informe corresponde a la evaluación de la merluza peruana por el método de área barrida, desde Puerto Pizarro al sur de Punta Malabrigo, entre el 4 al 18 de junio 2003. Se evaluó la recuperación del recurso después de casi nueve meses de suspensión de pesca comercial. Los resultados más importantes fueron: (1) Incremento de la densidad poblacional a profundidades entre 100 y 200 m en las subáreas B (4-5°S, con 36,53 t/mn2) y D (6-7°S, con 118 t/mn2); (2) La biomasa total llegó a 168.000 t, cifra mayor a las del verano 2003 y otoño 2002; (3) Incremento del stock desovante hasta 77.000 t, pero menor a la cantidad mínima requerida para garantizar su renovación y sustentabilidad en el tiempo; (4) La estructura poblacional conformada por ejemplares de 9 a 60 cm de LT, tamaños modales en 12, 19 y 29 cm de LT, y edades de 0 a 7 años con predominio de ejemplares jóvenes de uno (69%) y dos años de edad (24%), que evidenció buen reclutamiento en otoño.

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Los programas de aprendizaje a lo largo de la vida ( ) han ofrecido a las personas mayores una variedad de oportunidades educativas a nivel formal, no formal y informal. Dentro de esta iniciativa europea, el programa más conocido es el programa Grundtvig que está abierto a todos los programas universitarios para mayores, elevando el reto de la formación durante toda la vida a nivel europeo, y dónde los adultos adquieren herramientas en su aprendizaje, mejoran sus conocimientos y potencian sus habilidades.