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Search Results: 1 - 10 of 74969 matches for " Maria Juliana;Arahata "
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Comparison of metformin, gliclazide MR and rosiglitazone in monotherapy and in combination for type 2 diabetes
Vilar, Lucio;Canadas, Viviane;Arruda, Maria Juliana;Arahata, Carla;Agra, Rodrigo;Pontes, Lisete;Montenegro, Larissa;Vilar, Clarice Freitas;Silva, Lidiane Moura e;Albuquerque, José Luciano;Gusm?o, Amaro;
Arquivos Brasileiros de Endocrinologia & Metabologia , 2010, DOI: 10.1590/S0004-27302010000300010
Abstract: objective: to compare the efficacy and tolerability of metformin, rosiglitazone and gliclazide mr as monotherapy and in combination in the treatment of type 2 diabetes. subjects and methods: 250 patients treated with oral antidiabetic agents for at least 24 weeks in monotherapy or in combination therapy were included in this retrospective study. results: as monotherapy the reduction of fasting plasma glucose (fpg), postprandial glycemia (ppg) and hba1c was similar with the three drugs after 24 weeks. among patients on combination therapy, the reduction in hba1c, fpg and ppg was significantly lower with rosiglitazone plus metformin, as compared to metformin plus gliclazide mr or gliclazide mr plus rosiglitazone. patients treated with rosiglitazone achieved less favorable changes in lipid profile. conclusion: in monotherapy all drugs were equally effective in improving glycemic control, whereas the combination of metformin plus gliclazide mr provided the best results concerning the improvement of both, glycemic control and lipid profile.
Propagation of Second sound in a superfluid Fermi gas in the unitary limit
Emiko Arahata,Tetsuro Nikuni
Physics , 2009, DOI: 10.1103/PhysRevA.80.043613
Abstract: We study sound propagation in a uniform superfluid gas of Fermi atoms in the unitary limit. The existence of normal and superfluid components leads to appearance of two sound modes in the collisional regime, referred to as first and second sound. The second sound is of particular interest as it is a clear signal of a superfluid component. Using Landau's two-fluid hydrodynamic theory, we calculate hydrodynamic sound velocities and these weights in the density response function. The latter is used to calculate the response to a sudden modification of the external potential generating pulse propagation. The amplitude of a pulse which is proportional to the weight in the response function, is calculated the basis of the approach of Nozieres and Schmitt-Rink (NSR) for the BCS-BEC crossover. We show that, in a superfluid Fermi gas at unitarity, the second sound pulse is excited with an appreciate amplitude by density perturbations.
Damping of Condensate Oscillation of a Trapped Bose Gas in a One-Dimensional Optical Lattice at Finite Temperatures
Emiko Arahata,Tetsuro Nikuni
Physics , 2007, DOI: 10.1103/PhysRevA.77.033610
Abstract: We study damping of a dipole oscillation in a Bose-Condensed gas in a combined cigar-shaped harmonic trap and one-dimensional (1D) optical lattice potential at finite temperatures. In order to include the effect of thermal excitations in the radial direction, we derive a quasi-1D model of the Gross-Pitaeavskii equation and the Bogoliubov equations. We use the Popov approximation to calculate the temperature dependence of the condensate fraction with varying lattice depth. We then calculate the Landau damping rate of a dipole oscillation as a function of the lattice depth and temperature. The damping rate increases with increasing lattice depth, which is consistent with experimental observations. The magnitude of the damping rate is in reasonable agreement with experimental data. We also find that the damping rate has a strong temperature dependence, showing a sharp increase with increasing temperature. Finally, we emphasize the importance of the radial thermal excitations in both equilibrium properties and the Landau damping.
Theory of the Two-Particle Emission from Superfluid Fermi Gases in the BCS-BEC Crossover
Emiko Arahata,Tetsuro Nikuni
Physics , 2013, DOI: 10.1103/PhysRevA.90.043601
Abstract: We present a theory of the emission of fermion pairs from a superfluid Fermi gas induced by a photon absorption. In the solid state physics, this type of process is called double photo-emission (DPE). The spectrum of the induced two-particle current (or DPE current) provides a direct insight into the pair-correlation of condensate fermion pairs. We develop a general formalism for two-particle current induced by DPE by treating the coupling of two Fermi gases with the time-dependent perturbation theory. This formalism is used to calculate energy distributions of DPE current from the superfluid Fermi gas in the BCS-BEC crossover at T=0. We show that the DPE current has distinct contributions of the condensed pair components and uncorrelated pair states. We also calculate the angular dependence of DPE current in the BCS-BEC crossover. The DPE current of the tightly-bound molecules in the BEC regime is found to be quite deferent from that of the weakly-bound Cooper pairs.
DC conductivity in an s-wave superconducting single vortex system
Emiko Arahata,Yusuke Kato
Physics , 2013, DOI: 10.1007/s10909-013-0992-5
Abstract: We study dynamics of a two-dimensional s-wave superconductor in the presence of a moving single vortex. Our analysis is based on the quasiclassical theory including the Hall term, generalized by Kita[T. Kita, PRB, 64, 054503 (2001)]. We numerically calculate the linear response of a moving single vortex driven by a dc external current in a self-consistent way, in the sense that Dyson equation, gap equation, Maxwell equations and generalized quasiclassical equation are solved simultaneously. We obtain Hall conductivity induced by vortex motion using the generalized quasiclassical equation, while we confirm that it vanishes in the conventional quasiclassical equation.
Bose-Condensed Gases in a 1D Optical Lattice at Finite Temperatures
E. Arahata,T. Nikuni
Physics , 2006, DOI: 10.1007/s10909-007-9396-8
Abstract: We study equilibrium properties of Bose-Condensed gases in a one-dimensional (1D) optical lattice at finite temperatures. We assume that an additional harmonic confinement is highly anisotropic, in which the confinement in the radial directions is much tighter than in the axial direction. We derive a quasi-1D model of the Gross-Pitaeavkill equation and the Bogoliubov equations, and numerically solve these equations to obtain the condensate fraction as a function of the temperature.
Critical Velocity in a Bose Gas in a Moving Optical Lattice at Finite Temperatures
Emiko Arahata,Tetsuro Nikuni
Physics , 2009, DOI: 10.1103/PhysRevA.79.063606
Abstract: We study the critical velocity of a Bose-condensed gas in a moving one-dimensional (1D) optical lattice potential at finite temperatures. Solving the Gross-Pitaeavskii equation and the Bogoliubov equations, within the Popov approximation, we calculate the Bogoliubov excitations with varying lattice velocity. From the condition of the negative excitation energy, we determine the critical velocity as a function of the lattice depth and the temperature. We find that the critical velocity decreases rapidly with increasing the temperature; this result is consistent with the experimental observations. Moreover, the critical velocity shows a rapid decrease with increasing lattice depth. This tendency is much more significant than in the previous works ignoring the effect of thermal excitations in the radial direction.
Using Response Surface Methodology and High-Intensity Sweeteners’ Positive Synergy to Optimize Peach Nectar Acceptability  [PDF]
Lauro Melo, Juliana Maria Porto Cardoso, Juliana Rosa Battochio, Helena Maria André Bolini
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.45064
Abstract:

Combining the high-intensity sweeteners’ positive synergy with response surface methodology (RSM), it is possible to optimize food and beverage products liking, masking undesired sensory attributes and reducing costs and consumers’ additives intake (up to 50%). A RSM based on a five-level, two variable central composite rotatable designs (CCRD) was applied, varying aspartame and acesulfame-K concentrations in order to optimize consumers’ sensory liking (n = 118) for peach nectar in terms of appearance, aroma, flavor, and overall liking. Statistically valid models were found for flavor and overall liking attributes and highest liking values were found for samples combining the two sweeteners (therefore overcoming acesulfame-K’s sensory limitations) in lower concentrations, confirming the synergetic effect and allowing cost reduction and less additives intake, without losing sensory quality.

O ENSINO DE LíNGUA INGLESA E O USO DE PORTAIS DE CONTEúDO PARA A CONSTRU O DE AMBIENTES DE APRENDIZAGEM
Juliana Maria Cristiano Gense
Nuances : Estudos sobre Educa??o , 2012,
Abstract:
História ao pé da letra: uma introdu o à obra de Jules Michelet
Maria Juliana Gambogi Teixeira
Caligrama : Revista de Estudos Romanicos , 2011,
Abstract: Resumo: Este artigo apresenta, em grandes linhas, a obra e a fortuna crítica do historiador francês oitocentista Jules Michelet. Nosso objetivo é demonstrar como a fronteira entre história e literatura constitui, ao mesmo tempo e paradoxalmente, a condi o de possibilidade de seu renome e o principal desafio para sua atualiza o. Palavras-chaves: Fronteira entre história e literatura; Jules Michelet; fortuna crítica. Résumé: Cet article offre un panorama de l’oeuvre de l’historien fran ais Jules Michelet, tout comme de sa réception critique. L’objectif est celui de démontrer comment la frontière entre l’histoire et la littérature représente, à la fois et paradoxalement, et la condition de possibilité de sa renommée et le défis majeur qui entrave son actualisation. Mots-clés: Frontière entre littérature et histoire; Jules Michelet; réception critique. Keywords: Boundary between literature and history; Jules Michelet; critical fortune.
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