Time filter

Source Type

Silva D.A.S.,Federal University of Santa Catarina | Silva D.A.S.,Campus Universitario Reitor Joao David Ferreira Lima | Silva D.A.S.,Inonu University | Tremblay M.S.,University of Ottawa | And 2 more authors.
The Scientific World Journal | Year: 2014

Objective. The aim of this study was to identify the prevalence of excess television time and verify correlated factors in adolescent males and females. Methods. This cross-sectional study included 2,105 adolescents aged from 13 to 18 years from the city of Aracaju, Northeastern Brazil. Television time was self-reported, corresponding to the time spent watching television in a typical week. Several correlates were examined including age, skin color, socioeconomic status, parent education, physical activity level, consumption of fruits and vegetables, smoking status, alcohol use, and sports team participation. Results. The prevalence excess television time (≥2 hours/day) in girls and boys was 70.9% and 66.2%, respectively. Girls with low socioeconomic status or inadequate consumption of fruits and vegetables were more likely to have excess television time. Among boys, those >16 years of age or with black skin color were more likely to have excess television time. Conclusions. Excess television time was observed in more than two-thirds of adolescents, being more evident in girls. Correlated factors differed according to sex. Efforts to reduce television time among Brazilian adolescents, and replace with more active pursuits, may yield desirable public health benefits. © 2014 Diego Augusto Santos Silva et al. Source

Del Duca G.F.,Federal University of Santa Catarina | Nahas M.V.,Federal University of Santa Catarina | Nahas M.V.,Universitario Reitor Joao David Ferreira Lima | Garcia L.M.T.,University of Sao Paulo | And 4 more authors.
Preventive Medicine | Year: 2013

Objective: To estimate the prevalence and sociodemographic indicators associated with physical inactivity in leisure, commuting, work, and household in adults in Florianopolis, Brazil. Methods: Population-based cross-sectional study was conducted from September 2009 to January 2010, with adults between 20 to 59. years of age (n = 1720). Sociodemographic indicators and physical inactivity in each domain were assessed by a validated questionnaire, applied through face-to-face interviews. Results: The prevalence of physical inactivity in each domain was: leisure (52.5%); commuting (50.4%); work (80.9%); and household (57.6%). Women were 27% more inactive in leisure, while men were significantly more inactive at commuting and household (p <. 0.001). Older adults were more inactive in leisure (p = 0.04) and commuting (p = 0.05). Physical inactivity in leisure was higher in black adults and those who living with a partner and with lower educational level and lower income. In commuting, those living with a partner and who had higher income were more inactive. Physical inactivity at work was higher in white or brown adults, who had higher educational level and higher income. Physical inactivity in household was found to be higher in adults with higher educational level and higher income. Conclusions: Sociodemographic indicators presented different associations with physical inactivity in each domain. © 2012 Elsevier Inc. Source

Fernandes S.C.,Campus Universitario Reitor Joao David Ferreira Lima | Vieira I.C.,Campus Universitario Reitor Joao David Ferreira Lima | Peralta R.A.,Federal University of Santa Catarina | Neves A.,Federal University of Santa Catarina
Electrochimica Acta | Year: 2010

A gold electrode surface was modified using a dinuclear copper complex [CuII2 (Ldtb)(μ-OCH3)](BPh4) and then coated with a chitosan film. This biomimetic polymer film-coated electrode was employed to eliminate the interference from ascorbic acid and uric acid in the sensitive and selective determination of dopamine. The optimized conditions obtained for the biomimetic electrode were 0.1 M phosphate buffer solution (pH 8.0), complex concentration of 2.0 × 10-4 M, 0.1% of chitosan and 0.25% of glyoxal. Under the optimum conditions, the calibration curve was linear in the concentration range of 4.99 × 10-7 to 1.92 × 10-5 M, and detection and quantification limits were 3.57 × 10-7 M and 1.07 × 10-6 M, respectively. The recovery study gave values of 95.2-102.6%. The lifetime of this biomimetic sensor showed apparent loss of activity after 70 determinations. The results obtained with the modified electrode for dopamine quantification in the injection solution matrix were in good agreement with those of the pharmacopoeia method. © 2010 Elsevier Ltd. Source

Piovesan J.V.,Campus Universitario Reitor Joao David Ferreira Lima | Spinelli A.,Campus Universitario Reitor Joao David Ferreira Lima
Journal of the Brazilian Chemical Society | Year: 2014

A carbon-paste electrode modified with the polymer poly(vinylpyrrolidone) was evaluated through electrochemical studies and the electroanalytical determination of quercetin. For this electrode, cyclic voltammograms of quercetin showed three oxidation peaks at +0.32, +0.78 and +1.04 V. The electro-oxidation associated with the first peak leads to the formation of the corresponding ortho-quinone, which can be reduced under favorable experimental conditions. Under such conditions, the reaction is quasi-reversible and the process is diffusion-controlled. This behavior was exploited for the electroanalytical determination of quercetin by square-wave voltammetry. The calibration curve was linear in the concentration range of 0.5 to 5.5 μmol L-1 (R2 = 0.998). The limits of detection and quantification obtained were 0.17 μmol L-1 and 0.52 μmol L-1, respectively. The sensor was successfully used for the determination of quercetin in a pharmaceutical sample. The accuracy of the results achieved with the sensor was evaluated through comparison with the results provided by the UV-Vis technique. © 2014 Sociedade Brasileira de Quimica. Source

Contesini N.,Uniasselvi FAMEBLU | Adami F.,Laboratory of Scientific Writing | Adami F.,Campus Universitario Reitor Joao David Ferreira Lima | Blake M.D.-T.,Laboratory of Scientific Writing | And 10 more authors.
International Archives of Medicine | Year: 2013

Background: The aim of this study was to identify dietary strategies for physically active individuals with muscle dysmorphia based on a systematic literature review. Method. References were included if the study population consisted of adults over 18 years old who were physically active in fitness centers. We identified reports through an electronic search ofScielo, Lilacs and Medline using the following keywords: muscle dysmorphia, vigorexia, distorted body image, and exercise. We found eight articles in Scielo, 17 in Medline and 12 in Lilacs. Among the total number of 37 articles, only 17 were eligible for inclusion in this review. Results: The results indicated that the feeding strategies used by physically active individuals with muscle dysmorphia did not include planning or the supervision of a nutritionist. Diet included high protein and low fat foods and the ingestion of dietary and ergogenic supplements to reduce weight. Conclusion: Physically active subjects with muscle dysmorphia could benefit from the help of nutritional professionals to evaluate energy estimation, guide the diet and its distribution in macronutrient and consider the principle of nutrition to functional recovery of the digestive process, promote liver detoxification, balance and guide to organic adequate intake of supplemental nutrients and other substances. © 2013 Contesini et al.; licensee BioMed Central Ltd. Source

Discover hidden collaborations