189 resultados para Constantino


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The synergistic effect produced by metallic nanoparticles when incorporated into different systems empowers a research field that is growing rapidly. In addition, organometallic materials are at the center of intensive research with diverse applications such as light-emitting devices, transistors, solar cells, and sensors. The Langmuir-Blodgett (LB) technique has proven to be suitable to address challenges inherent to organic devices, since the film properties can be tuned at the molecular level. Here we report a strategy to incorporate gold nanoparticles (AuNPs) into the LB film by co-deposition in order to achieve surface-enhanced Raman scattering (SERS) of the zinc(II)-protoporphyrin (IX) dimethyl ester (ZnPPIX-DME). Prior to the LB co-deposition, the properties of the Langmuir monolayer of ZnPPIX-DME at the air-water interface, containing AuNPs in the subphase, are studied through the surface-pressure versus mean molecular area (π-A) isotherms. The ZnPPIX-DME+AuNPs π-A isotherm presented a significant shift to higher molecular area, suggesting an interaction between both ZnPPIX-DME molecules and AuNPs. Those interactions are a key factor allowing the co-deposition of both AuNPs and ZnPPIX-DME molecules onto a solid substrate, thus forming the LB film. SERS of ZnPPIX-DME was successfully attained, ensuring the spatial distribution of the AuNPs. Higher enhancement factors were found at AuNP aggregates, as a result of the intense local electromagnetic field found in the metal nanoparticle aggregates. The main vibrational bands observed in the SERS spectra suggest a physical adsorption of the ZnPPIX-DME onto the surface of AuNPs. The latter is not only in agreement with the interactions pointed out by the π-A isotherms but also suggests that this interaction is kept upon LB film co-deposition.

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É descrita a invenção de um substrato flexível portátil para detecção e análises químicas usando fenômenos de amplificação sers e serrs por espectroscopia micro-raman e processo de obtenção do dito substrato. É descrita a invenção de um substrato flexível portátil para detecção e análises químicas usando fenômenos de amplificação sers (surface enhanced raman spectroscopy) e serrs (surface-enhanced resonance spectroscopy) por espectroscopia micro-raman e respectivo processo de obtenção do dito substrato que provê um substrato de borracha natural impregnando com nanopartículas de ouro.

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The aim of this study was to examine changes on anaerobic power after competitive period in professional soccer players. Twenty five male was evaluated before (PRE) and after (POS) competitive period. To assess anaerobic power was used running based on anaerobic sprint test (RAST), which were determined the maximum power (MAXP), medium power (MEDP), minimum power (MINP) and fatigue index (FI). The test was performed in the first (PRE) and the last (POS) training session of competitive period, wich lasted 20 weeks. There were no significant difference (p>0,05) in POS condition compared to PRE condition on MAXP (10,70 ± 0,95 vs 10,83 ± 0,87), MINP (8,48 ± 0,92 vs 8,28 ± 0,76), MEDP (9,52 ± 0,83 vs 9,41 ± 0,61) and FI (22,73 ± 7,48 vs 25,53 ± 8,79). There was no significant change on anaerobic power after a competitive period wich lasted 20 weeks in professional soccer players.

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The aim of this study was to verify the use of exertion subjective perception to control warm-up intensity performed by continuous running in children. Twenty-one children (11,4 ± 0,8 years, 45 ± 9,8 kg e 153,6 ± 9,6 cm), performed warm-up by continuous running in randomic order in three conditions with diferent intensities using rate of perceived exertion (RPE). The intensities were chosen according to RPE Borg CR-10 and the arbitrary units used were three (B3), Five (B5) and nine (B9). The heart rate (HR) and mean velocity of the run (VEL) were evaluated to analyse the intensity of the three warm-up conditions. Statistical analysis was done by annova one-way followed by post-hoc tukey test, considering significant level of 5%. There were significant increase in HR (B3= 112 ± 10, B5 = 140 ± 18 e B9 = 176 ± 21 bpm) and VEL (B3 = 4,01 ± 0,5, B5 = 7,09 ± 1,22 e B9 = 10,97 ± 1,70 km/h) between B5 and B9 condition compared to B3. Moreover, in both parameters B9 presented significantly higher results compared to the condition B5. It´s possible to control warm-up intensity performed by continuous running in children using RPE Borg CR-10.

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Change on vertical jump after competitive period in professionals soccer players. Brazilian Journal of Biomotricity, v. 4, n. 2, p. 140-147, 2010. Soccer is a sport that demands different intensities of run, with decisive actions of a match being held in maximum intensity. Vertical jump test is widely used in soccer players due to the strong relationship with speed and agility. Futhermore, there are little information about change on vertical jump after the competitive season in soccer players. The aim of this study was to analyze change on vertical jump after the competitive season in professional soccer players. Took part in this study 21 male athletes (20.82 ± 3.16 years, 72.28 ± 8.74 kg and 179.91 ± 6.14 cm) subscribers to the 4th division of the Paulista championship of 2009. The competitive season had a duration of 20 weeks, with a total of 20 official matchs done. The test used was the counter-movement vertical jump (VJ), that was performed in the first (PRE) and last (POS) training session of the competitive period. After confirmation of data normality by Kolmogorov-Smirnov, the inferential analysis of the results of VJ between PRE and POS was performed using the paired t-test, considering the significance level of 5%. There was a significant increase (p<0,05) on VJ after the competitive period (PRE=54,19±4,46 and POS=57,94±5,23). According to the results of this study, it is possible to increase the performance of VJ in professional soccer players after the competitive period of 20 weeks duration.

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O projeto de Extensão Espaços Livres na Escola busca contribuir com o bem estar dos usuários, permitindo a estimulação dos sentidos, através da cor, textura, sabor, fragrância, luz e som ali presentes. A “aprendizagem emocional” ocorre como uma experiência não articulada. O brincar é a maneira como as crianças estabelecem relação com o mundo físico e social, em um cenário multissensorial, estimulando o desenvolvimento da mente, corpo e espírito. Entre as características essenciais presentes no jardim educativo podemos citar a relação entre o programa de necessidades e o ambiente, na escala da criança; a relação entre a idade e quantidade de crianças, além de oferecer aos usuários uma variedade de opções e a oportunidade de fazer escolhas, possibilitando a manipulação e permitindo o contato social, inserido no espaço junto à natureza. Portanto, o objetivo principal é a elaboração de um projeto paisagístico para um espaço livre escolar que busque um melhor desempenho ecológico, além de servir como estímulo à aprendizagem e à sociabilidade entre as crianças. Após consulta à Secretaria de Planejamento da Prefeitura Municipal de Bauru, averiguou-se que a Escola Municipal de Educação Infantil Integrada – EMEII Garibaldo, localizada no jardim Santana, em Bauru – SP, fora reinaugurada, havendo interesse na implantação do projeto de extensão universitária. Tendo como ponto de partida o levantamento bibliográfico sobre o tema, questionários aplicados aos funcionários, desenhos elaborados pelos alunos e a análise da edificação e de seu funcionamento, chegou-se a uma proposta de intervenção para as áreas livres como também alterações na edificação, depois de realizadas visitas técnicas à escola. Como metodologia para chegar a uma análise mais crítica do ambiente escolar, levou-se em consideração a opinião dos usuários do edifício - alunos e funcionários – sendo proposta uma atividade de desenho às crianças, evidenciando o que mais gostavam e o que menos gostavam na escola, além de desenhar como gostariam que fosse a escola. A turma selecionada para esta atividade apresentava uma faixa etária de 5 a 6 anos, num total de 17 crianças. Aos funcionários da instituição foi distribuído um questionário para que eles atribuíssem valores de acordo com as problemáticas abordadas. Foi realizada a tabulação dos questionários, com a aplicação do Diagrama de Paretto. A proposta de intervenção foi apresentada aos usuários, discutindo os principais pontos a serem revistos. O terreno da escola ocupa uma quadra completa, tendo em frente uma pequena praça. A vegetação de grande porte é suficiente para toda a área livre, no entanto foi necessário um tratamento paisagístico em escala mais reduzida, com o uso de gramíneas e arbustos de pequeno e médio porte. O uso de diferentes escalas foi importante não apenas na escolha da vegetação, mas também no emprego de diversos materiais, cores e espaços. Os resultados apresentados no projeto incluem a reforma de pisos, jardins, proposição de um novo layout para o playground e propostas para uma melhor organização dos ambientes, buscando dar ênfase à criação de uma identidade visual ao espaço, sem perder de vista a importância do ato criativo das crianças como parte do ambiente de aprendizagem. Além disso, buscou-se incentivar as atividades voltadas à sensibilização e conscientização das crianças quanto ao ambiente, estabelecendo conexões entre horticultura, paisagismo e educação ambiental, com a criação de uma pequena horta, que poderá ser abordada em aulas relacionadas à alimentação, aos sentidos, reciclagem, técnicas agrícolas e preservação do ambiente, valorizando “o fazer” dos alunos. As atividades realizadas demonstram a importância de estabelecermos vínculos entre a Universidade e a comunidade, com a aplicação das pesquisas realizadas. A experiência no ensino de Paisagismo, enriquecedora e instigante, busca levar os discentes a imprimir em seus projetos os valores estéticos, ambientais, funcionais e sociais. O Projeto de Extensão “Espaços Livres na Escola” também permite que levemos esta experiência à comunidade, buscando despertar a consciência e o respeito pela natureza, ao mesmo tempo em que estamos contribuindo, de maneira mais efetiva, na formação da paisagem urbana. No dia 30 de novembro de 2009, a análise e as propostas da extensão universitária “Espaços Livres na Escola” foram apresentadas pelo bolsista e os projetos entregues à diretora da EMEII Garibaldo, com o objetivo de contribuir para sua implementação.

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Introduction: Bamboos belong to the family Graminae, Bambusoidae subfamily, represented by about 1,250 species worldwide. Originally employed in construction and power, are currently the subject of investigations related to its therapeutic properties in neoplasms. The main species used for therapeutic purposes based on popular knowledge are: Phyllostachys nigra; Bambusa breiflora; tuldoides Bambusa textilis and Bambusa. The literature on the therapeutic action of bamboo species is scarce, but recent studies report a promising effect in the treatment of cancer and other chronic diseases. Objective: This study aimed to evaluate qualitatively the phytochemical composition of plant extract obtained from the leaves of the bamboo species Bambusa textilis, comparing this composition from vegetable leaves with 18 and 24 months of age. Methodology: After collecting plant leaves with 18 or 24 months, they were identified and submitted to drying and milling. For qualitative analysis of its components were employed methods of macroscopic evaluation (mucilage), method of benzoin (resin), reaction Shinoda (flavonoids), reaction with gelatin solution (tannins), boiling and foaming (saponins) and jobs of reactive Wagner, Bertrand, Dragendorff, Mayer, picric acid and tannic acid (alkaloids) (Biavatti; MILK, 2007). Results: in the youngest leaves were found positive for alkaloids, flavonoids, resins and saponins. In the leaves of the plant with 24 months were found only alkaloids flavonoids and resins. Conclusion: the composition of vegetable substances were found associated with a significant therapeutic potential difference and the phytochemical composition in comparison with plant leaves 18 or 24 months. Additional studies are needed to quantify these components, as well as the clarification of its action in the fight against cancer and chronic diseases.

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The aim of the present study were: 1) To verify the relationship of vertical, horizontal and sextuple jumps with agility and velocity of 5, 10 and 25 m; 2) To verify the capacity of these jumps to predict the agility and 5, 10 and 25 m velocity performance in children. Twenty eight boys (9.47 ± 0.64 years) and thirty girls (9.69 ± 0.70 years) were evaluated. The correlation values between agility and velocity on 5, 10 and 25 m velocity were, respectively, r = 0.63, 0.51, 0.44 and 0.64 with vertical jump, r = 0.68, 0.62, 0.28 and 0.62 with sextuple jump, and r = 0.60, 0.50, 0.26 and 0.57 with horizontal jump. The vertical and sextuple jumps were able to predict the agility and 25 m velocity performance (p < 0.05). Furthermore, they demonstrated capacity to predict 5 and 10 m velocity, respectively (p < 0.05). The vertical and sextuple jump tests may be used for assessment and control of training with children practicing activities that require agility and velocity, since both jumps predicted the agility and velocity performance, which did not occur with the horizontal jump.