Creatine supplementation on cognitive performance following exercise in female Muay Thai athletes

BACKGROUND: Creatine supplementation has some beneficial effects on cognitive processing in healthy adults, including athletes; however the effects on cognitive function following exhaustive exercise in athletes is unknown. Therefore, the purpose was to determine the effects of 28 days of creatine supplementation on tasks of cognitive performance immediately following exhaustive exercise in Muay Thai female athletes compared to placebo. METHODS: Using a repeated measures, double-blind, placebo controlled design, 26 female Muay Thai athletes (age: 26 ± 5 years; body mass: 65.1 ± 6.6 kg; height: 162 ± 5 cm; training experience: 2.6 ± 0.6 years) were randomized to supplement with creatine monohydrate (3 g/day) or placebo (maltodextrin) for 28 days. Prior to and following supplementation, measures of cognitive performance were assessed (visual and auditory reaction time, corsi block test, visual forward digit span, and Erikson Flanker Task) immediately after exercise. RESULTS: There was a time main effect for auditory reaction time (p = 0.035), with no differences between groups. There was a trend for an interaction effect for visual reaction time (p = 0.067), visual go-no-go reaction time (p = 0.087), and Erikson Flanker task (p = 0.06), with exploratory post hoc tests revealing improvements over time in the creatine group (p \u3c 0.05) with no changes in the PLA group (p \u3e 0.05). CONCLUSION: Twenty-eight days of creatine supplementation appeared to have a small but positive effect on cognitive performance following exhaustive exercise in female Muay Thai athletes. Future research using a larger dose over a longer duration is warranted

Immunotherapy in Allergic Asthma – 5 year analysis: Is it a curative approach?

Asthma is a common, chronic and heterogeneous disease;it affects people of all ages and there has been a recentincrease in its prevalence and severity. It may be mild,barely noticed by the patient, or it may range all the way tovery severe disease, causing constant symptoms that greatlyaffect the quality life of the patient. [...]info:eu-repo/semantics/publishedVersio

Estudio de las observaciones en rayos X de varias fulguraciones solares originadas en la misma región activa

Se han analizado los datos en Rayos X en el rango de energía 3.5-3.0 keV obtenidos por el Hard X-ray Spectrometer (HXIS) del satélite SMM, correspondiente a cuatro fulguraciones solares originadas en la misma región activa. Se trata de buscar similitudes en la morfología del campo magnético que las produce y las posibles coincidencias en las formas de liberación de energía. Se ha encontrado un corrimiento en el abrillantamiento de los rayos X duros que nos permiten sugerir la presencia de reconección magnética como fuente de suministro de la energía liberada en la fulguración.Asociación Argentina de Astronomí

Balance energético de la fulguración solar del 12 de noviembre de 1980

Estudiamos las características temporales y espaciales de la emisión en rayos X en el rango de energía 3.5-30 keV de la fulguración solar del 12 de noviembre de 1980. Los datos fueron obtenidos por el Hard X-Ray Imaging Spectrometer a bordo del satélite Solar Maximum Mission. Para nuestro análisis utilizamos también datos de otros intrumentos que volaron en el mismo satélite como el Hard-Ray Burst Spectrometer. Del balance de energía entre las distintas regiones del loop deducimos que, en la etapa de liberación primaria de energía en esta fulguración son importantes tanto el procesos de aceleración de partículas como la formación de regiones localizadas a alta temperatura.Asociación Argentina de Astronomí

Fulguraciones solares en regiones activas complejas

Se analizan características de fulguraciones solares definidas a partir de datos obtenidos por el Harx X-Ray Imaging Spectrometer a bordo del SMM y de observatorios terrestres, que incluyan evolución espacio-temporal de los rayos X duros, dependencia con el tiempo del contenido de energía térmica en distintas estructuras magnéticas, dureza e impulsividad de la emisión de rayos X duros, relación con la intensidad y morfología del campo magnético. De las observaciones se deducen propiedades sobre la liberación y almacenamiento de energía en distintas zonas de la región activa donde se producen las fulguraciones.Asociación Argentina de Astronomí

Estudio en rayos X de las fulguraciones de noviembre de 1980

Se analizan dos fulguraciones del 6 de noviembre de 1980 con datos de rayos X obtenidos con el Hard X-Ray Imaging Spectrometer a bordo del SMM. Se hace un estudio comparativo de la morfología y de la variación temporal de los parámetros físicos de ambas fulguraciones.Asociación Argentina de Astronomí

Survival, extinction and approximation of discrete-time branching random walks

We consider a general discrete-time branching random walk on a countable set X. We relate local, strong local and global survival with suitable inequalities involving the first-moment matrix M of the process. In particular we prove that, while the local behavior is characterized by M, the global behavior cannot be completely described in terms of properties involving M alone. Moreover we show that locally surviving branching random walks can be approximated by sequences of spatially confined and stochastically dominated branching random walks which eventually survive locally if the (possibly finite) state space is large enough. An analogous result can be achieved by approximating a branching random walk by a sequence of multitype contact processes and allowing a sufficiently large number of particles per site. We compare these results with the ones obtained in the continuous-time case and we give some examples and counterexamples.Comment: 32 pages, a few misprints have been correcte

Observational evidences of the particle acceleration process in a solar flare

The electrons accelerated in solar flares give rise to X-ray emission through thick and thin bremsstrahlung when interacting with the plasma within the loops. We have made a detailed study of the behaviour of the hard X-ray emission for the Nov. 6 1980, 17:25 U.T. flare so as to identify these processes and get information about the energy release mechanism. The observations are in good agreement with a two component model: a thermal emission superimposed to a non-thermal one produced by a power law spectrum of accelerated electrons.Asociación Argentina de Astronomí