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Florianopolis, Brazil

The Federal University of Santa Catarina is a public university in Florianópolis, the capital city of Santa Catarina in southern Brazil. Ranked as the 4th best overall university in Latin America by the Webometrics Ranking of World Universities, it is one of the leading Latin American research universities, being the third largest university in Brazil and the fifth in Latin America, noted for its engineering school, and the only Federal University in the state of Santa Catarina. UFSC is internationally known for the quality of its courses in mechanical engineering, control engineering, sanitary engineering, electrical engineering and dentistry.The organization of its campus is done in the 11 Centers of Education , divided by field of study. Every Center of Education is divided in departments, the largest one being Department of Mechanical Engineering. The oldest is the Center of Juridic science, that is itself the department of Law, which was the first of UFSC's departments to be officially recognized in 1932. Wikipedia.

Castro L.B.,Federal University of Santa Catarina
Physical Review C - Nuclear Physics

We address the behavior of the Dirac equation with scalar (S), vector (V), and tensor (U) interactions under the γ5 discrete chiral transformation. By using this transformation, in a simple way, we can obtain solutions for the Dirac equation with spin (Δ=VS=0) and pseudospin (Σ=V+S=0) symmetries, which includes a tensor interaction. As an application, the Dirac equation with scalar, vector, and tensor Cornell radial potentials is considered, and the correct solution to this problem is obtained. © 2012 American Physical Society. Source

Queiroz L.P.,Federal University of Santa Catarina
Current Pain and Headache Reports

Studying the epidemiology of fibromyalgia (FM) is very important to understand the impact of this disorder on persons, families and society. The recent modified 2010 classification criteria of the American College of Rheumatology (ACR), without the need of tender points palpation, allows that larger and nationwide surveys may be done, worldwide. This article reviews the prevalence and incidence studies done in the general population, in several countries/continents, the prevalence of FM in special groups/settings, the association of FM with some sociodemographic characteristics of the population, and the comorbidity of FM with others disorders, especially with headaches. © 2013 Springer Science+Business Media New York. Source

Germana C.,Federal University of Santa Catarina
Monthly Notices of the Royal Astronomical Society: Letters

Twin-peak high-frequency quasi-periodic oscillations (HF QPOs) observed in the power spectra of low-mass X-ray binaries, with either a black hole or a neutron star, have central frequencies that are typical of the orbital motion time-scale close to the compact object. Thus, twin HF QPOs might carry the fingerprint of physical effects in a strongly curved space-time. We study the azimuth phase φ(t) for orbital motion in the Schwarzschild metric and calculate the power spectra to check whether they display the features seen in the observed ones. We show that the timing of φ(t) on non-closed orbits can account for the observed twin-peak HF QPOs. The uppermost couple of peaks in frequency has the lower peak that corresponds to the azimuthal frequency νφ, the upper one to νφ + νr. The azimuth phase temporal behaviour φ(t) on a slightly eccentric orbit in the Schwarzschild metric is described by a linear function of slope νφplus an oscillating term at the relativistic radial frequency νr. We deduce that the twin-peak HF QPOs might originate from a frequency modulated signal driven by the kinematics of orbital motion in a curved space-time. © 2012 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society. Source

Andrade E.L.,Federal University of Santa Catarina
American journal of physiology. Renal physiology

The ankyrin-repeat transient receptor potential 1 (TRPA1) has been implicated in pathological conditions of the bladder, but its role in overactive bladder (OAB) following spinal cord injury (SCI) remains unknown. In this study, using a rat SCI model, we assessed the relevance of TRPA1 in OAB induced by SCI. SCI resulted in tissue damage, inflammation, and changes in bladder contractility and in voiding behavior. Moreover, SCI caused upregulation of TRPA1 protein and mRNA levels, in bladder and in dorsal root ganglion (DRG; L6-S1), but not in corresponding segment of spinal cord. Alteration in bladder contractility following SCI was evidenced by enhancement in cinnamaldehyde-, capsaicin-, or carbachol-induced bladder contraction as well as in its spontaneous phasic activity. Of relevance to voiding behavior, SCI induced increase in the number of nonvoiding contractions (NVCs), an important parameter associated with the OAB etiology, besides alterations in other urodynamic parameters. HC-030031 (TRPA1 antagonist) treatment decreased the number and the amplitude of NVCs while the TRPA1 antisense oligodeoxynucleotide (AS-ODN) treatment normalized the spontaneous phasic activity, decreased the cinnamaldehyde-induced bladder contraction and the number of NVCs in SCI rats. In addition, the cinnamaldehyde-induced bladder contraction was reduced by exposure of the bladder preparations to HC-030031. The efficacy of TRPA1 AS-ODN treatment was confirmed by means of the reduction of TRPA1 expression in the DRG, in the corresponding segment of the spinal cord and in the bladder, specifically in detrusor muscle. The present data show that the TRPA1 activation and upregulation seem to exert an important role in OAB following SCI. Source

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