922 resultados para Equilíbrio dos poderes


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O biodiesel é definido como sendo uma mistura de monoésteres de ácidos graxos derivados de gorduras animal ou óleos vegetais, obtido por meio do processo de transesterificação com alcoóis de cadeia curta. Durante a sua produção é utilizada uma quantidade em excesso de álcool e um catalisador para favorecer a reação de formação dos ésteres; desta forma a corrente de saída do reator contém o catalisador, o álcool que não reagiu e os produtos da transesterificação, biodiesel e glicerina, formando um sistema bifásico; dependendo do grau de solubilidade desses compostos, pode haver quantidades de biodiesel na fase rica em glicerina e quantidades de glicerina na fase rica em biodiesel. Durante o processo de purificação do biodiesel é necessário executar uma lavagem com água, para promover a retirada do catalisador e impurezas do produto de interesse. Devido à quantidade de compostos envolvidos na produção e purificação é essencial conhecer os dados de equilíbrio líquido-líquido para poder predizer as proporções em que os compostos coexistem e, posteriormente, proceder com a purificação sob condições adequadas para obtenção do biodiesel com maior rendimento e auxiliar no projeto do reator e sistemas de separação. Os objetivos desse trabalho foram produzir o biodiesel a partir de uma planta oleaginosa nativa da região, a castanha do Brasil (Bertholletia excelsa H. B. K.) e, determinar dados de equilíbrio líquido-líquido (ELL) para os sistemas ternários: biodiesel de castanha do Brasil + metanol + glicerina e biodiesel de castanha do Brasil + metanol + água nas temperaturas de 30°C e 50°C. O biodiesel produzido foi inicialmente caracterizado segundo as normas da Agência Nacional de Petróleo (ANP) utilizando métodos físico-químicos. Os dados obtidos foram posteriormente correlacionados com os modelos termodinâmicos NRTL e UNIQUAC para o calculo do coeficiente de atividade de cada componente na fase liquida, com estimativa de novos parâmetros de interação energética. Os resultados obtidos com a modelagem foram satisfatórios, e foi observado que o modelo NRTL representou melhor os dados experimentais.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Refletir, partindo do registro fotográfico, sobre o fluxo de ida e volta dos moradores da ilha do Maracujá, entre a ilha e Belém, fazendo uso das formas com que utilizam seus corpos ou 'sabem servir-se' deles, no que Mauss chamou de técnicas corporais. Corpos evidenciados, uma vez que estão sempre à mostra, capazes, portanto, de ser visualmente etnografados. Inspirado em Certeau, o artigo busca pensar as táticas corporais elaboradas pelos moradores da ilha ao praticar as paisagens de pertença, revelando expressões de corpo peculiares na construção de suas experiências cotidianas. Tais observações não remetem a um corpo-objeto, mas a um corpo que é o sujeito da cultura, como diz Csordas, um corpo que é "a base existencial da cultura".

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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This study aimed to evaluate the effect of muscle strengthening in the balance, mobility and quality of life (QoL) in individuals with Parkinson's disease (PD), and to check the correlation between muscle strengthening and QoL. Nine subjects belonging to both sexes, diagnosed with PD, participated in this study. Initially, they went through an evaluation of their balance and functional mobility through the Berg Balance Scale (BBS), the ­Timed Up and Go (TUG) test, and a QoL test through the Parkinson's Disease Questionnaire (PDQ-39). The subjects also performed a test for determining the maximum load (one-repetition maximum) for the muscle groups trained. After the normality and homogeneity of the data were verified, the Student's t-test and Spearman correlation test were carried out. A significance level of p<0.05 was considered. We verified an improvement in balance (p=0.008) and QoL (p=0.013), and a negative correlation between balance and QoL (evaluation: r=-0.65 and p=0.05, revaluation: r=-0.82 and p=0.005). It was concluded that muscle strengthening was efficient in the improvement of balance and QoL in individuals with PD.

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Based on the concept that horses have balanced symmetry between its anatomical regions, the aim of this study was to introduce a method of assessing the balance of equines through body proportions. Altogether twelve linear measurements, using metric tape, were measured in 234 horses Quarter Horses for evidence of barrel racing. From these measurements were built nine body proportions, each one given by the ratio of two specific measures, and the effects of sex, weight, age and degree of blood on the balance were evaluated. To check the significance tests we used the F statistic, considering P<0.05. It was found that the linear measurements ML2, ML3 and ML5 were mainly responsible for the disproportionality of the horses evaluated. The effect of sex was significant (P<0.05) for four proportions (R1, R3, R4 and R9) and females were more distant from the concept of balance than males.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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During the aging process, increase the postural asymmetries that can affect the control mechanism of balance leading to falls. To evaluate the static posture of elderly; measure the balance and correlate the results of the posture with balance. The study involved 28 elderly patients, 13 males and 15 females (71.8 ± 5.7 years). The volunteers were photographed, the images transferred to a computer for evaluation of static posture and calculating the projection of the center of gravity in the frontal and sagittal planes using the Postural Assessment Software. The balance was assessed by the Berg Balance Scale (BBS). Correlations were performed by Spearman test (p ≤ 0.05). Data were presented as mean ± standart deviation (SD). BBS scores = 50.5 ± 3.3; the sagittal plane (anterior asymmetry) = 45.5 ± 11.1%; frontal plane (right or left asymmetry) = 9.8 ± 7.9. We found a correlation between BBS and asymmetry of the sagittal plane (r = -0.46, p = 0.01) and between BBS and asymmetry of the frontal plane (r = -0.41, p = 0.03). The data suggest that the higher the previous projection (asymmetry of the sagittal plane) and lateral projection (asymmetry of the frontal plane), scores of the BBs will be lower, indicating an increase of unbalance in elderly.

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Introduction: Parkinson’s disease (PD) is a chronic disease of the nervous system, characterized by degeneration of neurons in the mesencephalic substantia nigra, leading to a clinical state of rest tremor, bradykinesia, muscular rigidity and postural instability. Physical therapy seeks to act by slowing the progression of the disease and when done in a group and maintain and / or improving the motor skills of the individual, can provide psychosocial benefi ts. Objective: examine the infl uence of the physical therapy group in balance, functional mobility and quality of life of individuals with PD. Method: participated in this study 04 subjects were female, mean age 67.75 (± 9.5) years, with medical diagnosis of PD, stages 1 to 3 of the Hoehn & Yahr. Before starting treatment, subjects underwent an assessment of the balance (BBS), functional mobility (TUG) and the quality of life (PDQ-39).The treatment was performed in groups, for a period of 10 weeks, lasting 60 minutes each session twice a week, totaling 20 sessions of physiotherapy. Upon completion of the treatment period the subjects were again assessed for balance, functional mobility and quality of life. The data were analyzed using the Student t-test, with signifi cance level of 5% (p ≤ 0.05). Results: statistical analysis showed signifi cant differences in three variables: equilibrium (p = 0.010), functional mobility (p = 0.029) and quality of life (p = 0.004), after physiotherapy intervention. Conclusion: physiotherapy treatment was group provides better balance, functional mobility and quality of life of patients with PD.