Consumo audiovisual y usos de las TIC en el noroeste del Conurbano Bonaerense : Resultados de una encuesta de hogares en los partidos de José C. Paz, Malvinas Argentinas, Moreno y San Miguel

En este artículo se presentan los primeros resultados generales de caracterización del consumo audiovisual y uso de TIC (tecnologías de la información y la comunicación) en los partidos de José C. Paz, Malvinas Argentinas, Moreno y San Miguel. El interés por estudiar los consumos culturales no es nuevo. Existen estudios en diferentes contextos que pueden ser considerados verdaderos clásicos. Sin embargo, son pocos los estudios empíricos sobre la Región Metropolitana de Buenos Aires, y menos aún aquellos sobre los cuatro partidos de referencia de este trabajo. La encuesta que presentamos busca ser una primera aproximación a los consumos audiovisuales y el uso de las TIC en los hogares de estos partidos, en tanto consumos culturales que determinan aspectos fundamentales de la vida social. (Párrafo extraído del texto a modo de resumen)Mesa 34: La cultura en plural. Consumos, prácticas y valores en torno a las culturas populares y masivasFacultad de Humanidades y Ciencias de la Educació

Pulmonary function in chronic hemiplegic/hemiparetic patients: a review of the literature

[Resumen] Objetivo: Realizar una revisión bibliográfica sobre la función pulmonar y la dinámica costal y diafragmática de los pacientes con hemiplejía/hemiparesia crónica. Material y métodos: Bases de datos: Medline, Embase y PEDro. Se limitaron las búsquedas por el idioma y se descartaron las cartas al director y las editoriales. No se estableció límite por fecha de publicación. Fueron analizados 10 artículos que satisfacían el objetivo de la revisión. Resultados: Los sujetos con hemiplejía/hemiparesia crónica muestran un patrón respiratorio restrictivo, con disminución significativa de la máxima ventilación voluntaria y las presiones respiratorias máximas, sumado a una dinámica costal y diafragmática alterada. Conclusiones: La población analizada muestra limitaciones en los flujos y volúmenes pulmonares y alteraciones en la musculatura respiratoria. Se necesitan futuros trabajos metodológicamente rigurosos, que nos permitan conocer, con un alto grado de evidencia, el alcance del deterioro de la función pulmonar que se da en la hemiplejía/hemiparesia crónica.[Abstract] Objective: To review the literature about pulmonary function and costal and diaphragmatic dynamics in chronic hemiplegic/hemiparetic patients. Materials and Methods: Databases: Medline, Embase and PEDro. The searches were limited by the language and letters and editorials were ruled out. No deadlines for the publication were established. Finally, 10 articles that adhered to the objective were analyzed. Results: Patients with a chronic hemiplegia / hemiparesis have a restrictive breathing pattern with a reduction of Maximum Voluntary Ventilation and lower maximum respiratory pressures. Moreover, they have altered costal and diaphragmatic dynamics. Conclusions: The population analyzed show limited lung flows and volumes and alterations in the respiratory muscles. Future methodologically rigorous research is needed in order to know with a high level of evidence the importance of the deterioration of the pulmonary function within chronic hemiplegia/hemiparesis patients

Consumo audiovisual y usos de las TIC en el noroeste del Conurbano Bonaerense : Resultados de una encuesta de hogares en los partidos de José C. Paz, Malvinas Argentinas, Moreno y San Miguel

En este artículo se presentan los primeros resultados generales de caracterización del consumo audiovisual y uso de TIC (tecnologías de la información y la comunicación) en los partidos de José C. Paz, Malvinas Argentinas, Moreno y San Miguel. El interés por estudiar los consumos culturales no es nuevo. Existen estudios en diferentes contextos que pueden ser considerados verdaderos clásicos. Sin embargo, son pocos los estudios empíricos sobre la Región Metropolitana de Buenos Aires, y menos aún aquellos sobre los cuatro partidos de referencia de este trabajo. La encuesta que presentamos busca ser una primera aproximación a los consumos audiovisuales y el uso de las TIC en los hogares de estos partidos, en tanto consumos culturales que determinan aspectos fundamentales de la vida social. (Párrafo extraído del texto a modo de resumen)Mesa 34: La cultura en plural. Consumos, prácticas y valores en torno a las culturas populares y masivasFacultad de Humanidades y Ciencias de la Educació

Consumo audiovisual y usos de las TIC en el noroeste del Conurbano Bonaerense : Resultados de una encuesta de hogares en los partidos de José C. Paz, Malvinas Argentinas, Moreno y San Miguel

En este artículo se presentan los primeros resultados generales de caracterización del consumo audiovisual y uso de TIC (tecnologías de la información y la comunicación) en los partidos de José C. Paz, Malvinas Argentinas, Moreno y San Miguel. El interés por estudiar los consumos culturales no es nuevo. Existen estudios en diferentes contextos que pueden ser considerados verdaderos clásicos. Sin embargo, son pocos los estudios empíricos sobre la Región Metropolitana de Buenos Aires, y menos aún aquellos sobre los cuatro partidos de referencia de este trabajo. La encuesta que presentamos busca ser una primera aproximación a los consumos audiovisuales y el uso de las TIC en los hogares de estos partidos, en tanto consumos culturales que determinan aspectos fundamentales de la vida social. (Párrafo extraído del texto a modo de resumen)Mesa 34: La cultura en plural. Consumos, prácticas y valores en torno a las culturas populares y masivasFacultad de Humanidades y Ciencias de la Educació

Respiratory muscle training in patients with stroke

Carta al directorLette

Correlation Between Adenosine Triphosphate Levels, Dopamine Release and Electrical Activity in the Carotid Body: Support for the Metabolic Hypothesis of Chemoreception

Producción CientíficaAn unsolved issue for the arterial chemoreceptors is the mechanism by which hypoxia and other natural stimuli lead to an increase of activity in the carotid sinus nerve. According to the 'metabolic hypothesis', the hypoxic activation of the carotid body (CB) is mediated by a decrease of the ATP levels in the type I cells, which then release a neurotransmitter capable of exciting the sensory nerve endings. Using an in vitro preparation of cat CB, we report that ATP levels in the CB do in fact decrease when the organs are exposed to moderate, short lasting hypoxia (5 min 20% 02). Additionally, we found that decreases in ATP levels induced by 2-deoxyglucose (2 mM) or sodium cyanide (0.1 raM) are closely correlated with dopamine release from type I cells and electrical activity in the carotid sinus nerve elicited by these agents. The possible cause-effect relationship of these events is discusse

Effects of 2-Deoxy-D-Glucose on In Vitro Cat Carotid Body

Producción CientíficaThe process of chemosensory transduction in the arterial chemoreceptors is not well understood. According to the metabolic hypothesis of chemoreception, a decrease in arterial pO 2 will produce a decrease in the adenosine triphosphate (ATP) content in the chcmosensory type I cells, leading to release of a neurotransmitter and increased sensory neural activity. There is a paucity of direct experimental support for this hypothesis, and in the present work, we have tested the postulates of the metabolic hypothesis in an in vitro preparation of cat carotid body using 2-deoxy-D-glucose as an ATP-depleting agent. This preparation, when superfused with Tyrode containing 5 mM Na+-pyruvate instead of glucose, responds normally to hypoxia, low pH and acetylcholinc, and maintains normal ATP levels. Under these conditions, 2-deoxy-D-glucose is a chemostimulant, i.e. electrical activity in the carotid sinus nerve is increased, with a threshold concentration of 0.25 mM and a maximum response at about 2-4 raM. These concentrations of 2-deoxyglucose evoke a dose-dependent release of [3H]dopamine (synthesized from pH]tyrosine) from the carotid bodies which parallels the electrical activity. The 2-deoxy-D-glucose-evoked release and electrical activity is dependent on the presence of extracellular Ca 2+ . These same concentrations of 2-deoxy-D-glucose significantly reduce the ATP content of the carotid bodies. The events postulated bv the metabolic hypothesis, i.e. decrease in ATP content, release of a putative neurotransminer and activation of the sensory nerve endings are found to occur simultaneously. A possible cause-effect relationship between these three events is discussed

Biosensors Platform Based on Chitosan/AuNPs/Phthalocyanine Composite Films for the Electrochemical Detection of Catechol. The Role of the Surface Structure

Producción CientíficaBiosensor platforms consisting of layer by layer films combining materials with different functionalities have been developed and used to obtain improved catechol biosensors. Tyrosinase (Tyr) or laccase (Lac) were deposited onto LbL films formed by layers of a cationic linker (chitosan, CHI) alternating with layers of anionic electrocatalytic materials (sulfonated copper phthalocyanine, CuPcS or gold nanoparticles, AuNP). Films with different layer structures were successfully formed. Characterization of surface roughness and porosity was carried out using AFM. Electrochemical responses towards catechol showed that the LbL composites efficiently improved the electron transfer path between Tyr or Lac and the electrode surface, producing an increase in the intensity over the response in the absence of the LbL platform. LbL structures with higher roughness and pore size facilitated the diffusion of catechol, resulting in lower LODs. The [(CHI)-(AuNP)-(CHI)-(CuPcS)]2-Tyr showed an LOD of 8.55∙10−4 μM, which was one order of magnitude lower than the 9.55·10−3 µM obtained with [(CHI)-(CuPcS)-(CHI)-(AuNP)]2-Tyr, and two orders of magnitude lower than the obtained with other nanostructured platforms. It can be concluded that the combination of adequate materials with complementary activity and the control of the structure of the platform is an excellent strategy to obtain biosensors with improved performances.Ministerio de Ciencia, Innovación y Universidades - Fondo Europeo de Desarrollo Regional (project RTI2018-097990-B-100)Junta de Castilla y Leon - Fondo Europeo de Desarrollo Regional (project VA275P18)Infraestructuras Red de Castilla y León (grant UVA01

Comparison of Two Protocols for the Assessment of Maximal Respiratory Pressures: Spanish Society of Pulmonology and Thoracic Surgery Versus American Thoracic Society/European Respiratory Society

[Abstract] Background. The measurement of maximal respiratory pressures (MRPs) is commonly used to assess respiratory muscle strength. However, in Spain, there is no consensus on which is the most adequate measurement protocol, as the Spanish Society of Pneumology and Thoracic Surgery (SEPAR) protocol differs from the one endorsed by the American Thoracic Society/European Respiratory Society (ATS/ERS). This study compared the absolute and predictive values of maximal expiratory and inspiratory pressures (MEP and MIP) in healthy adults obtained with the two protocols. Methods. A cross-sectional study with a sample of healthy adults was conducted. Lung function and MRPs were assessed. MEP and MIP were measured using a digital manometer according to the SEPAR and ATS/ERS. Protocols were applied in random order by the same trained physiotherapist. The comfort experienced with each protocol was assessed through a short questionnaire. Paired t-tests were used to compare the results from both protocols. Results. A total of 31 subjects (mean age 35.7±12.4 years; 14 females; FEV₁=108.3±10.5%; FVC=103.7±10%) were included. There was a significant difference between MRPs favouring the SEPAR protocol, with the mean difference being 34.9±28.1 cmH₂O (p˂0.001) for MEP and 8±11.6 cmH₂O (p=0.001) for MIP. ATS/ERS protocol was, however, considered more comfortable than SEPAR (p<0.005). Conclusions. This study shows that, in healthy adults, higher MRPs are obtained using the SEPAR protocol. Yet, the ATS/ERS protocol is experienced as more comfortable. Future studies are needed to analyse the application of both protocols in other populations and their associated comfort