Inclusões Dinâmicas em Escalas Temporais: Existência de Soluções sob a Hipótese de Semicontinuidade Inferior

In this paper we consider the problem of differential inclusion in time scales whose vector field is a multifunction, that is, a function that maps points to sets. It is provided conditions of existence without requiring compactness of the vector field; it is required that the vector field is closed, convex, and lower semicontinuous. In previous work in literature, it is required that the field is either scalar or compact, convex, and has closed graph.

Soluções numéricas de Equações Diferenciais Fracionária e Ordinária para o cálculo da distribuição da concentração em um sistema de compartimento

The purpose of this work was the study of numerical methods for differential equations of fractional order and ordinary. These methods were applied to the problem of calculating the distribution of the concentration of a given substance over time in a given physical system. The two compartment model was used for representation of this system. Comparison between numerical solutions obtained were performed and, in particular, also compared with the analytical solution of this problem. Finally, estimates for the error between the solutions were calculated

Soluções do tipo vórtice em um modelo de Maxwell-Chern-Simons-Higgs com campos de Gauge distintos

Pós-graduação em Física - FEG

Comparação entre soluções irrigadoras na endodontia: clorexidina x hipoclorito de sodio

The objective of this review was reporting an overview about the properties of two irrigating solutions, solution of sodium hypochlorite and chlorhexidine, used in the treatment of root canals. A solution must submit irrigating antimicrobial action, dissolve waste tissue, promote wetting to facilitate the instrumentation, and present biocompatibility with the adjacent tissues. The sodium hypochlorite used in different concentrations has been the solution of choice among professionals by presenting antimicrobial action and act as a solvent tissue. However, today, chlorhexidine has been widely used as an irrigating solution due to specific properties that enable its use, such as substantivity, antimicrobial effectiveness, and low toxicity. Thus the solution of chlorhexidine with different concentrations is presented as an alternative to irrigating solution for the treatment of root canals.

Existência de soluções quase automórficas para equações diferenciais abstratas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Soluções quase periódicas para equações diferenciais funcionais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Técnicas de parametrização para o fluxo de carga continuado desenvolvidas a partir da análise das trajetórias de soluções do fluxo de carga

Pós-graduação em Engenharia Elétrica - FEIS

Efeito de soluções fluoretadas contendo xilitol e sorbitol no número de estreptococos do grupo mutans na saliva de seres humanos

The objective of this study was to assess the effect of 0.05% sodium fluoride solutions containing 2.5% or 12.5% xylitol on the number of Streptococcus mutans in the human mouth. Fifty boys between 8 and 16 years of age participated in this double-blind crossover study. Of the original 50 boys, 33 finished the study. Participants were randomly divided into four groups. The following solutions were employed: placebo solution; 0.05% sodium fluoride solution; 0.05% sodium fluoride + 2.5% xylitol + 2% sorbitol; 0.05% sodium fluoride + 12.5% xylitol + 2% sorbitol. Each solution was used for a 28-day period (20 mL/day, twice a day), with a 10-day washout period between solutions. There were no significant differences (P = 0.32) between the two xylitol-containing solutions (2.5% vs. 12.5%) concerning the number of Streptococcus mutans. However, there was a significant difference between these two xylitol-containing solutions and the sodium fluoride and placebo solutions (P < 0.001). Our results suggest that the 0.05% sodium fluoride solutions containing either 2.5% or 12.5% xylitol caused a significant reduction in the number of Streptococcus mutans.

Estudo da adsorção de níquel (II) e zinco (II) em soluções aquosas por lama vermelha natural e ativada: influência do PH, isotermas, cinética e termodinâmica

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Alteração cromática de resinas compostas laboratoriais submetidas à imersão em diferentes soluções

The pigmentation of indirect composite resins has been one of the most common reasons that lead the restorative treatment to failure. The purpose of this study was to investigate the effect of different solutions on color stability of indirect composite resins. Five brands of indirect composite resins were tested: Adoro, Resilab, Cristobal, Sinfony and Epricord. The samples were immerged in eleven solutions (n=10): common liquid foods (coke soft drink, red wine, coffee and orange juice), mounthrinses (Listerine, Oral-B, Colgate Plax and Periogard) and bleaching agents (carbamide peroxide 16%, 7.5% and hydrogen peroxide 38%) and artificial saliva (control group). The color was measured by a spectrophotometer before and after 7, 14 and 21 days of immersion in common liquid foods, after 12, 24, 36 and 60 hours of immersion in mounthrinses and after 7 and 14 days of immersion in bleaching agents. The Cristobal and Adoro resins showed highest values of ΔE statistically significant compared to the others resin brands. Adoro’s ΔE values changed significantly after the immersion process in red wine and coffee and also between periods measured. The resins Cristobal and Sinfony showed the highest values of ΔE after the immersion process in Listerine with difference statistically significant in comparison to control group. Besides, there was difference statistically significant of the ΔE values  for  Cristobal  after  immersion  in hydrogen peroxide 7,5% in comparison to control group. It can be conclude that all the solutions promoted color change on the indirect composite resins. However, ΔE values  are  whitin  the  values clinically acceptable.