Search results for "Spect"
showing 10 items of 28650 documents
Programa de Intervención Cognitivo Conductual para la Ansiedad en las personas con Trastornos del Espectro del Autismo
2023
Los estudiantes autistas a menudo experimentan trastornos de ansiedad (TA) como una condición concurrente y se asocia con un deterioro funcional considerable. La universidad proporciona apoyo académico a los estudiantes con discapacidad, sin embargo, pocas instituciones proporcionan apoyos preventivos a los estudiantes TEA-AF. Entre las necesidades más solicitadas se encuentra el apoyo para hacer frente a ansiedad derivada de la propia actividad académica y social. El objetivo de esta tesis doctoral es demostrar el nivel de eficacia de un breve programa en de una forma modificada de MBCT, Programa de Intervención Cognitivo Conductual para Ansiedad PICCA, en la reducción de los niveles de an…
Nuevos desafíos en el análisis de la composición mineral de los alimentos
2017
El ser humano resulta expuesto a numerosas sustancias químicas que se incorporan a la cadena alimentaria, constituyendo la ingesta a través de la dieta una de las principales vías de entrada en el organismo. Entre estas sustancias, destaca el interés del estudio de elementos altamente tóxicos como por ejemplo arsénico (As), berilio (Be), cadmio (Cd), cromo (Cr VI) plomo (Pb), mercurio (Hg) y níquel (Ni); elementos de menor toxicidad como antimonio (Sb), bario (Ba), cesio (Cs), germanio (Ge), paladio (Pd), teluro (Te), talio (Tl); estaño (Sn), titanio (Ti), y vanadio (V) o elementales esenciales como cobalto (Co), cobre (Cu), hierro (Fe), magnesio (Mg), molibdeno (Mo), selenio (Se), cromo (C…
CHARACTERIZATION AND ENERGETIC METABOLISM ANALYSIS OF DIFFERENT POPULATIONS OF UMBILICAL CORD MESENCHYMAL STEM CELLS FOR THE TREATMENT OF STROKE
Stroke is a leading cause of death and disability worldwide. A direct consequence of oxygen and glucose deprivation during stroke is the dysfunction of mitochondria that impairs oxidative metabolism and contributes to oxidative stress, neuronal death and inflammation. Human umbilical cord (UC)-derived MSCs (UC-MSCs) are an attractive source for regenerative medicine purposes due to their self-renewal and multipotent differentiation potential, immunomodulatory and anti-inflammatory abilities. Notably, because UC is supplied from only three blood vessels, the UC-MSCs are physiologically adapted to survive in a relatively hypoxic and glucose poor environment leading to the hypothesis that thes…
Brain Opioid Activity and Oxidative Injury: Different Molecular Scenarios Connecting Celiac Disease and Autistic Spectrum Disorder
2020
Celiac Disease (CD) is an immune-mediated disease triggered by the ingestion of wheat gliadin and related prolamins from other cereals, such as barley and rye. Immunity against these cereal-derived proteins is mediated by pro-inflammatory cytokines produced by both innate and adaptive system response in individuals unable to adequately digest them. Peptides generated in this condition are absorbed across the gut barrier, which in these patients is characterized by the deregulation of its permeability. Here, we discuss a possible correlation between CD and Autistic Spectrum Disorder (ASD) pathogenesis. ASD can be induced by an excessive and inappropriate brain opioid activity during the neon…
A new perspective on adolescent athletes’ transition into upper secondary school : A longitudinal mixed methods study protocol
2016
The challenge of combining elite sport and education into a dual career pathway remains to be a source of concern for many high-performance athletes. Previous research findings suggest that committed participation in both domains is highly demanding and success in one pursuit often comes at the expense of the other. There are emergent studies, however, that argue for the beneficial and complementary nature of dual career pathways. Consequently, we emphasize the importance of understanding the processes underlying differences in the development of athletes’ life trajectories. This article presents a study protocol to explore new methodological and analytical approaches that may extend curren…
Micelles in Mixtures of Sodium Dodecyl Sulfate and a Bolaform Surfactant
2006
Mixtures composed of water, sodium dodecyl sulfate (SDS), and a bolaform surfactant with two aza-crown ethers as polar headgroups (termed Bola C-16) were investigated by modulating the mole ratios between the components. The two surfactants have ionic and nonionic, but ionizable, headgroups, respectively. The ionization is due to the complexation of alkali ions by the aza-crown ether unit(s). Structural, thermodynamic, and transport properties of the above mixtures were investigated. Results from surface tension, translational self-diffusion, and small angle neutron scattering ( SANS) are reported and discussed. Interactions between the two surfactants to form mixed micelles result in a com…
Effects of Transcranial Direct Current Stimulation on Baseline and Slope of Prefrontal Cortex Hemodynamics During a Spatial Working Memory Task
2020
Background: Transcranial direct current stimulation (tDCS) has been shown to be an inexpensive, safe, and effective way of augmenting a variety of cognitive abilities. Relatively recent advances in neuroimaging technology have provided the ability to measure brain activity concurrently during active brain stimulation rather than after stimulation. The effects on brain activity elicited by tDCS during active tDCS reported by initial studies have been somewhat conflicted and seemingly dependent on whether a behavioral improvement was observed. Objective: The current study set out to address questions regarding behavioral change, within and between-participant designs as well as differentiatin…
Characterisation of component pigments in a mixture
2011
This work is part of Raman spectra database constitution of pigments and materials of Cultural Heritage interest for polychrome artworks characterization. The colours of paintings are often obtained mixing pigments of palette artist’s. The attribution of a work of art to an author and the individuation of fakes are related to the identification of used pigments and also to the detection of mixture constituents. The main research objective is the extension of PH3DRA laboratory database with information useful to detect not only each single pigment but also quantitative data regarding its relative ratio in the examined mixture. The availability of spectra as revealed represents the primary li…
Sur la piste des matériaux organiques grâce à la spectrométrie de masse
2018
Identifying the organic materials present, establishing their origin and degree of preservation, understanding their manufacturing process and their use, all of which require interdisciplinary studies involving closely specialists in materials and human sciences. In this very specific context, mass spectrometry has become a key tool to improve knowledge of past civilizations but also to better preserve and restore the discrete remains of archaeomaterials. The identification of diagnostic molecular markers of natural substances is now a recognized strategy for characterizing amorphous organic materials (fats, beeswaxes, vegetable substances such as resins and tars). New advances have also ma…
La décision d'habiter ici ou ailleurs
2012
International audience; Choisir son lieu de vie est certainement un acte fondamental dans la société humaine. La décision d'habiter ici ou ailleurs dépend des expériences vécues et influence les itinéraires individuels. En ce sens elle associe des facteurs émotionnels et cognitifs avec les réalités spatiales. La connaissance de ces processus de décision est essentielle pour orienter les stratégies d'aménagement du territoire. Cet ouvrage propose, dans une perspective transdisciplinaire, une lecture originale des travaux actuels portant sur le choix résidentiel et les décisions qui y sont associées. Des géographes, psychologues, économistes, sociologues, neurologues et linguistes ont travail…