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Search Results: 1 - 10 of 676809 matches for " M. C. de Albuquerque Neto "
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The Aging Bladder in Females Evaluated by Urodynamics  [PDF]
M. C. de Albuquerque Neto, Leslie Clifford Noronha Araujo, Thome Decio Pinheiro Barros Junior, Joao Luiz Amaro, Flavia Cristina Morone Pinto, Fabio de Oliveira Vilar, Salvador Vilar Correia Lima
Open Journal of Urology (OJU) , 2017, DOI: 10.4236/oju.2017.73008
Abstract: Aim: To determine whether bladder functions deteriorate with age. Methods: Data contained in electronic medical record (INFOMED?) were used in this institutional retrospective review. Analysis was done on the urodynamic studies in women over 18 years old conducted between May 2011 and November 2015. Patients with previous history of pelvic surgery or radiotherapy, neurological disease, vaginal prolapse greater than grade I, congenital urogenital malformations, urinary obstructive disease, diabetes, or the use of any medication that could interfere with bladder function were excluded from the analysis. The urodynamic parameters analyzed were the Maximum Cystometric Capacity (MCC), Voiding Volume (VV), Maximum Flow (Qmax), Bladder Compliance (BC), Detrusor Pressure at Maximum Flow (PdetQmax), Bladder Contractility Index (BCI), Bladder Voiding Efficiency (BVE) and Post-Void Residual Urine Volume (PVR). Patients were further stratified in five groups according to age (A—18 to 40; B—41 to 50; C—51 to 60; D—61 to 70; E—over 70 years old). Results: Out of 3103 urodynamic studies analyzed, 719 were eligible for the study. The average age of patients was 49.3 (+13.2) years old and in all evaluated parameters, statistically significant correlation between age and decline of bladder function was obtained (p < 0.05). Moreover, mathematical equations were presented to estimate the parameters values in relation to age. Conclusions: This study showed a decline in bladder storage function (reduction in MCC and BC) and in bladder emptying function (reduction in Qmax, PdetQmax, VV, BCI and BVE with an increase in PVR) with age.
Revisiting the Evaluation of a Multidimensional Gaussian Integral  [PDF]
R. P. Mondaini, S. C. de Albuquerque Neto
Journal of Applied Mathematics and Physics (JAMP) , 2017, DOI: 10.4236/jamp.2017.52039
Abstract: The evaluation of Gaussian functional integrals is essential on the application to statistical physics and the general calculation of path integrals of stochastic processes. In this work, we present an elementary extension of an usual result of the literature as well as an alternative new derivation.
Leptospira and Inflammation
C. F. Gon?alves-de-Albuquerque,P. Burth,A. R. Silva,M. Younes-Ibrahim,H. C. Castro-Faria-Neto,M. V. Castro-Faria
Mediators of Inflammation , 2012, DOI: 10.1155/2012/317950
Abstract: Leptospirosis is an important zoonosis and has a worldwide impact on public health. This paper will discuss both the role of immunogenic and pathogenic molecules during leptospirosis infection and possible new targets for immunotherapy against leptospira components. Leptospira, possess a wide variety of mechanisms that allow them to evade the host immune system and cause infection. Many molecules contribute to the ability of Leptospira to adhere, invade, and colonize. The recent sequencing of the Leptospira genome has increased our knowledge about this pathogen. Although the virulence factors, molecular targets, mechanisms of inflammation, and signaling pathways triggered by leptospiral antigens have been studied, some questions are still unanswered. Toll-like receptors (TLRs) are the primary sensors of invading pathogens. TLRs recognize conserved microbial pattern molecules and activate signaling pathways that are pivotal to innate and adaptive immune responses. Recently, a new molecular target has emerged—the Na/K-ATPase—which may contribute to inflammatory and metabolic alteration in this syndrome. Na/K-ATPase is a target for specific fatty acids of host origin and for bacterial components such as the glycolipoprotein fraction (GLP) that may lead to inflammasome activation. We propose that in addition to TLRs, Na/K-ATPase may play a role in the innate response to leptospirosis infection. 1. Introduction Leptospirosis is a zoonosis of global importance caused by several species and more than 200 different serovars of pathogenic Leptospira spp. The disease affects both animals and humans and has veterinary, economic, and medical relevance [1, 2]. Leptospirosis is still a major public health problem in tropical countries, with epidemic outbreaks occurring in the rainy season and after floods [3–5]. The annual incidence of this disease is estimated at 10–100 per 100,000 in tropical regions and 0.1–1.0 per 100,000 in temperate areas [6]. In recent years, leptospirosis outbreaks have occurred all over the world; thus, an adequate disease notification system would be useful to create surveillance networks [7]. Leptospirosis is transmitted to humans primarily by water contaminated with the urine of either wild or domestic mammals that have been chronically colonized by Leptospira spp [8]. It has recently been reported that Leptospira can persist in certain organs, indicating that people themselves can act as hosts [9]. In developed countries, the transmission mechanism is mainly associated with occupational and recreational activities [10–14]. The infection
Efeitos do tartarato de metoprolol em pacientes portadores de insuficiência cardíaca
Figueiredo Neto, José Albuquerque de;Mady, Charles;Grupi, César;
Arquivos Brasileiros de Cardiologia , 2006, DOI: 10.1590/S0066-782X2006001600016
Abstract: objective: to study the effects of metoprolol tartrate therapy in patients with heart failure. methods: fifty patients (36 males) aged 52±14.8 yrs, with functional class ii to iv heart failure (hf) and left ventricular ejection fraction (lvfe) < 45%, assessed by radionuclide ventriculography, were evaluated in a retrospective study. metoprolol tartrate was added to the usual therapy, with a starting dose of 12.5 mg, which was increased weekly to a maximum of 200 mg/day, according to patients? tolerance. clinical evaluation, electrocardiogram, doppler echocardiogram, 24-h holter monitoring and radionuclide ventriculography were carried out in the pre-treatment phase and repeated three and six months after the start of therapy. results: at the end of six months, there was functional class (nyha) improvement with a reduction from 3.04±0.11 to 1.66±0.06(p<0.001). ejection fraction increased from 29.84+1.61% to 38.56±1.95% (p< 0.001). the left ventricular diastolic diameter showed a reduction from 67.70±1.31 mm to 63.96±1.29 mm (p<0.001), and the left ventricular systolic diameter showed a reduction from 54.80±1.67 mm to 48.58±1.38 (p<0.001). there was no alteration in noradrenaline levels during the six-month follow-up period (p>0.05). cardiac frequency decreased from 78.84±1.68 to 67.48±1.86 b.p.m. (p<0.001). conclusion: the adding of metoprolol tartrate to the usual heart failure therapy is followed by an increase of ejection fraction, functional class improvement, and decrease of ventricular diameters and cardiac frequency. these results suggest anti-remodeling effects in patients with hf who utilize metoprolol tartrate in addition to the usual therapy.
Uniaxial Lifshitz Point at $O(ε_L^2)$
Luiz C. de Albuquerque,Marcelo M. Leite
Physics , 2000,
Abstract: The critical exponents $\nu_{L2}, \eta_{L2}$ and $\gamma_{L2}$ of a uniaxial Lifshitz point are calculated at two-loop level using renormalization group and $\epsilon_{L}$-expansion techniques. We found a new constraint involving the loop momenta along the competition axis, which allows to solve the two-loop integrals. The exponent $\gamma_{L2}$ obtained using our method is in good agreement with numerical estimates based on Monte Carlo simulations.
Comment on ``Casimir force in compact non-commutative extra dimensions and radius stabilization''
Luiz C. de Albuquerque,R. M. Cavalcanti
Physics , 2001, DOI: 10.1088/1126-6708/2001/07/025
Abstract: We call attention to a series of mistakes in a paper by S. Nam [JHEP 10 (2000) 044, hep-th/0008083].
When the Casimir energy is not a sum of zero-point energies
Luiz C. de Albuquerque,R. M. Cavalcanti
Physics , 2001, DOI: 10.1103/PhysRevD.65.045004
Abstract: We compute the leading radiative correction to the Casimir force between two parallel plates in the $\lambda\Phi^4$ theory. Dirichlet and periodic boundary conditions are considered. A heuristic approach, in which the Casimir energy is computed as the sum of one-loop corrected zero-point energies, is shown to yield incorrect results, but we show how to amend it. The technique is then used in the case of periodic boundary conditions to construct a perturbative expansion which is free of infrared singularities in the massless limit. In this case we also compute the next-to-leading order radiative correction, which turns out to be proportional to $\lambda^{3/2}$.
Reply on "Lifshitz-point critical behaviour to $O(ε_L^2)$"
Luiz C. de Albuquerque,Marcelo M. Leite
Physics , 2001, DOI: 10.1088/0305-4470/35/7/402
Abstract: We reply to a recent comment by H. W. Diehl and M. Shpot (cond-mat/0106502) criticizing our paper J. Phys. A: Math. Gen. 34 (2001) L327-332. We show that the approximation we use for evaluating higher-loop integrals is consistent with homogeneity. A new renormalization group approach is presented in order to compare the two methods with high-precision numerical data concerning the uniaxial case. We stress that the isotropic behaviour cannot be obtained from the anisotropic one.
Anisotropic Lifshitz Point at $O(ε_L^2)$
Luiz C. de Albuquerque,Marcelo M. Leite
Physics , 2001, DOI: 10.1088/0305-4470/34/22/102
Abstract: We present the critical exponents $\nu_{L2}$, $\eta_{L2}$ and $\gamma_{L}$ for an $m$-axial Lifshitz point at second order in an $\epsilon_{L}$ expansion. We introduced a constraint involving the loop momenta along the $m$-dimensional subspace in order to perform two- and three-loop integrals. The results are valid in the range $0 \leq m < d$. The case $m=0$ corresponds to the usual Ising-like critical behavior.
Renormalization Group Study of Chern-Simons Field Coupled to Scalar Matter in a Modified BPHZ Subtraction Scheme
L. C. de Albuquerque,M. Gomes,A. J. da Silva
Physics , 2000, DOI: 10.1103/PhysRevD.62.085005
Abstract: We apply a soft version of the BPHZ subtraction scheme to the computation of two-loop corrections from an Abelian Chern-Simons field coupled to (massive) scalar matter with a $\lambda(\Phi^\dag\Phi)^2$ and $\nu(\Phi^\dag\Phi)^3$ self-interactions. The two-loop renormalization group functions are calculated. We compare our results with those in the literature.
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