69 research outputs found
Memoria leída en el Congreso Nacional Pedagógico, en la sesión celebrada el día 29 de mayo de 1882
Copia digital : Junta de Castilla y León. Consejería de Cultura y Turismo, 201
Estimación del rendimiento en calidad de chapa de tres clones de chopo mediante ultrasonidos
El objetivo principal del estudio es desarrollar una metodología de ensayos utilizando el equipo de ultrasonidos Fakopp en árboles en pie y recién apeados, que permita estimar eficientemente el rendimiento en calidad de chapa tras el desenrollo en tres clones de Populus.
Otros objetivos son estudiar la capacidad de predicción de la densidad mediante el empleo del penetrómetro Pilodyn en árboles en pie, así como analizar la influencia del clon en los resultados de ultrasonidos en madera en pie y apeada y analizar la influencia de las variables morfológicas del tronco, nudosidad y densidad de cada clon en el rendimiento final de chapa tras el desenrollo,
Como punto final se pretende definir una función de predicción del rendimiento en calidad de chapa en función de la velocidad de propagación de la onda en madera en pie y apeada, y de otras variables morfológicas del tronco y la nudosidad.Departamento de Ingeniería Agrícola y ForestalMáster en Ingeniería de Monte
Identification of prefoldin amplification (1q23.3-q24.1) in bladder cancer using comparative genomic hybridization (CGH) arrays of urinary DNA
Array-CGH represents a comprehensive tool to discover genomic disease alterations that could
potentially be applied to body fluids. In this report, we aimed at applying array-CGH to urinary samples to
characterize bladder cancer.
Methods: Urinary DNA from bladder cancer patients and controls were hybridized on 44K oligonucleotide arrays.
Validation analyses of identified regions and candidates included fluorescent in situ hybridization (FISH) and
immunohistochemistry in an independent set of bladder tumors spotted on custom-made tissue arrays (n = 181).
Results: Quality control of array-CGH provided high reproducibility in dilution experiments and when comparing
reference pools. The most frequent genomic alterations (minimal recurrent regions) among bladder cancer urinary
specimens included gains at 1q and 5p, and losses at 10p and 11p. Supervised hierarchical clustering identified the
gain at 1q23.3-q24.1 significantly correlated to stage (p = 0.011), and grade (p = 0.002). The amplification and
overexpression of Prefoldin (PFND2), a selected candidate mapping to 1q23.3-q24.1, correlated to increasing
stage and tumor grade by means of custom-designed and optimized FISH (p = 0.013 and p = 0.023,
respectively), and immunohistochemistry (p ≤0.0005 and p = 0.011, respectively), in an independent set of
bladder tumors included in tissue arrays. Moreover, PFND2 overexpression was significantly associated with poor
disease-specific survival (p ≤0.0005). PFND2 was amplified and overexpressed in bladder tumors belonging to
patients providing urinary specimens where 1q23.3q24.1 amplification was detected by array-CGH.
Conclusions: Genomic profiles of urinary DNA mirrowed bladder tumors. Molecular profiling of urinary DNA
using array-CGH contributed to further characterize genomic alterations involved in bladder cancer progression.
PFND2 was identified as a tumor stratification and clinical outcome prognostic biomarker for bladder cancer
patientsSupported by grants (SAF2009-13035 and SAF2012-40206) from the Spanish
Ministry of Education and Culture (to Dr Sánchez-Carbayo). Virginia López is
recipient of a predoctoral award from the Spanish Ministry of Education and
Cultur
Emission line gas ionisation in young radio galaxies
This paper is the second in a series in which we present
intermediate-resolution spectra for a complete sample of 14 compact radio
sources, taken with the aim of investigating the impact of the nuclear activity
on the cirumnuclear interstellar medium (ISM) in the early stages of radio
source evolution. In the first paper we presented the kinematic results from
the line modelling and reported fast outflows in the circumnuclear gas. Here,
we use the line fluxes to investigate the physical conditions and dominant
ionisation mechanisms of the emission line gas. We find evidence for large
electron densities and high reddening in the nuclear regions, particularly in
the broader, blueshifted components. These results are consistent with the idea
that the young, recently triggered radio sources still reside in dense and
dusty cocoons deposited by the recent activity triggering event. In addition,
we find that the quiescent nuclear and extended narrow components are
consistent with AGN photoionisation. For the nuclear broader and shifted
components the results are less clear. Whilst there are suggestions that the
broader components may be closer to shock plus precursor models on the
diagnostic diagrams (with high electron temperatures and densities), we are
unable to unambiguously distinguish the dominant ionisation mechanism using the
optical emission line ratios. This is surprising given the strong evidence for
jet-cloud interactions (broad emission lines, large outflow velocities and
strong radio-optical alignments), which favours the idea that the warm gas has
been accelerated in shocks driven by the radio lobes expanding through a dense
cocoon of gas deposited during the triggering event.Comment: Accepted for publication in MNRAS - Full paper (including Appendices)
available at http://www.astron.nl/~morganti/Papers/Holt_MNRAS2009.p
Low endemicity and low pathogenicity of rotaviruses among rural children in Costa Rica
Artículo científico -- Universidad de Costa Rica. Instituto de Investigaciones en Salud. 1985Rotaviruses were prospectively studied in 51 rural Costa Rican children from birth to two
years. Samples of feces were collected weekly over a 33-month period. Rotavirus was detected
in 45 (1.04%) of 4,317 fecal specimens; 39 infections were documented (an incidence
of 0.5 infection per child-year), only five of which were associated with diarrhea
(a pathogenicity of 12.8%). Secretory antibody in fecal extracts, detected in six of 39 infections,
was short lived and did not protect against reinfection. Serum antibody was present
in 69.6% of two-year-old children, but was not detected in 18.8% with documented infections.
On the other hand, serum antibody was present in six of 14 children in whom rotavirus
was not detected, thus increasing the overall incidence to 0.6 infection per child-year. The
combination of prolonged breast-feeding, exposure to a lower infecting dose (compared
with urban children), and a higher standard of hygiene than expected may explain the
low incidence and low pathogenicity of rotavirus among these rural children.Universidad de Costa Rica. Instituto de Investigaciones en Salud.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias de la Salud::Instituto de Investigaciones en Salud (INISA
Memoria leida en el Congreso Nacional Pedagógico : en la sesión celebrada el dia 29 de mayo de 1882
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