42 research outputs found
Baryon Resonances
In this talk I show recent results on how many excited baryon resonances
appear as systems of one meson and one baryon, or two mesons and one baryon,
with the mesons being either pseudoscalar or vectors. Connection with
experiment is made including a discussion on old predictions and recent results
for the photoproduction of the resonance, as well as the
prediction of one baryon state around 1920 MeV which might have been
seen in the reaction.Comment: Talk given at the 10th International Conference on Hypernuclear and
Strange Particle Physics, Tokai, Japan, Sptember 200
Monochromatic neutrino beams
In the last few years spectacular results have been achieved with the
demonstration of non vanishing neutrino masses and flavour mixing. The ultimate
goal is the understanding of the origin of these properties from new physics.
In this road, the last unknown mixing [Ue3] must be determined. If it is proved
to be non-zero, the possibility is open for Charge Conjugation-Parity (CP)
violation in the lepton sector. This will require precision experiments with a
very intense neutrino source. Here a novel method to create a monochromatic
neutrino beam, an old dream for neutrino physics, is proposed based on the
recent discovery of nuclei that decay fast through electron capture. Such
nuclei will generate a monochromatic directional neutrino beam when decaying at
high energy in a storage ring with long straight sections. We also show that
the capacity of such a facility to discover new physics is impressive, so that
fine tuning of the boosted neutrino energy allows precision measurements of the
oscillation parameters even for a [Ue3] mixing as small as 1 degree. We can
thus open a window to the discovery of CP violation in neutrino oscillations
A global view of drug-therapy interactions
Network science is already making an impact on the study of complex systems
and offers a promising variety of tools to understand their formation and
evolution (1-4) in many disparate fields from large communication networks
(5,6), transportation infrastructures (7) and social communities (8,9) to
biological systems (1,10,11). Even though new highthroughput technologies have
rapidly been generating large amounts of genomic data, drug design has not
followed the same development, and it is still complicated and expensive to
develop new single-target drugs. Nevertheless, recent approaches suggest that
multi-target drug design combined with a network-dependent approach and
large-scale systems-oriented strategies (12-14) create a promising framework to
combat complex multigenetic disorders like cancer or diabetes. Here, we
investigate the human network corresponding to the interactions between all US
approved drugs and human therapies, defined by known drug-therapy
relationships. Our results show that the key paths in this network are shorter
than three steps, indicating that distant therapies are separated by a
surprisingly low number of chemical compounds. We also identify a sub-network
composed by drugs with high centrality measures (15), which represent the
structural back-bone of the drug-therapy system and act as hubs routing
information between distant parts of the network. These findings provide for
the first time a global map of the largescale organization of all known drugs
and associated therapies, bringing new insights on possible strategies for
future drug development. Special attention should be given to drugs which
combine the two properties of (a) having a high centrality value and (b) acting
on multiple targets.Comment: 16 pages, 4 figures. It was submitted to peer review on August 15,
200
Changes in synaptic transmission and protein expression in the brains of adult offspring after prenatal inhibition of the kynurenine pathway
During early brain development, N-methyl-d-aspartate (NMDA) receptors are involved in cell migration, neuritogenesis, axon guidance and synapse formation, but the mechanisms which regulate NMDA receptor density and function remain unclear. The kynurenine pathway of tryptophan metabolism includes an agonist (quinolinic acid) and an antagonist (kynurenic acid) at NMDA receptors and we have previously shown that inhibition of the pathway using the kynurenine-3-monoxygenase inhibitor Ro61-8048 in late gestation produces rapid changes in protein expression in the embryos and effects on synaptic transmission lasting until postnatal day 21 (P21). The present study sought to determine whether any of these effects are maintained into adulthood. After prenatal injections of Ro61-8048 the litter was allowed to develop to P60 when some offspring were euthanized and the brains removed for examination. Analysis of protein expression by Western blotting revealed significantly reduced expression of the GluN2A subunit (32%) and the morphogenetic protein sonic hedgehog (31%), with a 29% increase in the expression of doublecortin, a protein associated with neurogenesis. No changes were seen in mRNA abundance using quantitative real-time polymerase chain reaction. Neuronal excitability was normal in the CA1 region of hippocampal slices but paired-pulse stimulation revealed less inhibition at short interpulse intervals. The amount of long-term potentiation was decreased by 49% in treated pups and recovery after low-frequency stimulation was delayed. The results not only strengthen the view that basal, constitutive kynurenine metabolism is involved in normal brain development, but also show that changes induced prenatally can affect the brains of adult offspring and those changes are quite different from those seen previously at weaning (P21). Those changes may be mediated by altered expression of NMDAR subunits and sonic hedgehog
Novedoso asignador de talla de calzado para la venta por Internet
[ES] MADE IN ME (www.madeinmeshoes.com) es una empresa dedicada al comercio electrĂłnico de calzado diseñado por el propio cliente en funciĂłn de sus gustos y preferencias. El Instituto de Biomecánica (IBV) ha desarrollado para esta empresa un nuevo asignador de talla de calzado de mujer basado en la antropometrĂa de la poblaciĂłn femenina española. Además, el asignador está personalizado para los distintos modelos de calzado que comercializa la empresa.Solves Camallonga, C.; Nacher Fernandez, B.; Gonzalez Garcia, JC.; Herraiz, E.; Benages, L.; Uriel-Molto, J.; Gil Mora, S.... (2017). Novedoso asignador de talla de calzado para la venta por Internet. Revista de Biomecánica (Online). (64). http://hdl.handle.net/10251/104225S6
Validation of the Functional Assessment of Chronic Illness Therapy-Spiritual Well-Being-Expanded (FACIT-Sp-Ex) Across English and Spanish-Speaking Hispanics/Latinos: Results From the Hispanic Community Health Study/Study of Latinos Sociocultural Ancillary Study
The validity of the Functional Assessment of Chronic Illness Therapy-Spiritual Well-Being (FACIT-Sp) has been examined in primarily non-Hispanics/Latinos with chronic illness. This study assessed the psychometric properties of the nonillness, expanded FACIT-Sp (FACIT-Sp-Ex) in 5,163 U.S. Hispanic/Latino adults. Measures were interviewer-administered in English or Spanish. Confirmatory factor analyses indicated 4 factors: meaning, peace, faith, and relational. The scale demonstrated measurement invariance across English and Spanish. Subscales displayed adequate internal and test-retest reliability. Scores were positively associated with Duke Religion Index (DUREL; Koenig, Parkerson, & Meador, 1997) subscales. When all subscales were entered in a single model, meaning and peace were inversely associated with depressive symptoms and positively associated with physical health-related quality of life (HRQOL). Faith was positively associated with depressive symptoms and inversely associated with HRQOL. Relational was not associated with any outcome. FACIT-Sp-Ex subscales were generally more strongly associated than DUREL subscales with well-being. The FACIT-Sp-Ex appears to be a valid measure of spiritual well-being in U.S. Hispanics/Latinos