264 resultados para NMDAR. Modelo animal. Potencial de campo elétrico. Ritmos cerebrais. Eletrofisiologia in vivo
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Exercise physiology has attempted to reproduce the experimental exercise in the laboratory using mainly rats. The swimming exercise has emerged as one of the leading research in these type ergometers. Thus, this research consisted of a literature review addressing the key issues which involve the exercise of swimming in the model rats. Training of aerobic and anaerobic swimming, evaluation models and models of periodization were the topics suggested in this research. In several studies, models of aerobic and anaerobic training have been proposed with the aim of studying their effect on normal and abnormal physiological parameters. However, earlier studies lacked methods of analysis aiming to determine the exercise intensity in the animal model. For this reason, in the last decade, assessment models have been adapted for humans to animals, especially rats. The maximal lactate steady state (MLSS) and lactate minimum (LM) are among the various techniques used to measure the amount of effort produced by swimming exercise in rats. Thereafter, based on biochemical parameters such as lactate, swimming exercise in rats has become the highest-rated, ie, using as reference the anaerobic threshold (AT). In another aspect, an entirely new line of research has tried to understand and promising swimming training in a periodized and its effects on some biochemical parameters. But this is an area little researched so far. Thus, the experimental model of swimming has proved an important resource of exercise physiology. From this model, it becomes possible to study the exercise, especially swimming, in more accurate, based on invasive and incisive analysis of the rat
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Animal by-product meals have large variability in crude protein (CP) content and digestibility. In vivo digestibility procedures are precise but laborious, and in vitro methods could be an alternative to evaluate and classify these ingredients. The present study reports prediction equations to estimate the CP digestibility of meat and bone meal (MBM) and poultry by-product meal (PM) using the protein solubility in pepsin method (PSP). Total tract CP digestibility of eight MBM and eight PM samples was determined in dogs by the substitution method. A basal diet was formulated for dog maintenance, and sixteen diets were produced by mixing 70 % of the basal diet and 30 % of each tested meal. Six dogs per diet were used to determine ingredient digestibility. In addition, PSP of the MBM and PM samples was determined using three pepsin concentrations: 0·02, 0·002 and 0·0002 %. The CP content of MBM and PM ranged from 39 to 46 % and 57 to 69 %, respectively, and their mean CP digestibility by dogs was 76 (2·4) and 85 (2·6) %, respectively. The pepsin concentration with higher Pearson correlation coefficients with the in vivo results were 0·0002 % for MBM (r 0·380; P = 0·008) and 0·02 % for PM (r 0·482; P = 0·005). The relationship between the in vivo and in vitro results was better explained by the following equations: CP digestibility of MBM = 61·7 + 0·2644 × PSP at 0·0002 % (P = 0·008; R (2) 0·126); and CP digestibility of PM = 54·1 + 0·3833 × PSP at 0·02 % (P = 0·005; R (2) 0·216). Although significant, the coefficients of determination were low, indicating that the models were weak and need to be used with caution.
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Usually organic polymeric diodes are made with a semiconductor layer placed between two electrodes in a sandwich-like architecture, where the electrodes are deposited on the surfaces of a polymeric semiconductor film. This methodology leads to two main problems: i) the polymeric film top surface is rough and irregular, resulting in non-uniform electric field into the device; ii) during the deposition of metallic electrode in the top surface polymeric film, by thermal evaporation, occurs the diffusion of metal atoms into the polymeric film, changing the material electronic structure. Thus, the metal-semiconductor junction is not well defined, which is essential for the production of good quality Schottky diode, which exhibits ideality factor close to the unity and low turn-on voltage. In order to avoid these two problems, in the present research was proposed to manufacture an organic diode with the semiconductor polymeric layer deposited over bimetallic (gold and aluminum) interdigitated electrodes. The doping of the active layer was performed by immersing the device in hydrochloric acid solution with pH 2 during different times in order to promote different doping levels of the semiconductor polymer. Was verified that the proposed diode, which exhibits well-defined metal-semiconductor junction, operates as a Schottky diode, with good ideality factor, 10 ± 3, and low turn-on voltage, 1,2 ± 0,2 V, in comparison with conventional organic polymeric diodes. Contrasting with the ideality factor and turn-on voltage, the diode rectification ratio was obtained as 7, a value lower than the expected for a good organic diode. Was also showed that the diode characteristics were dependent on the semiconductor polymer doping level, and that the diode characteristics were optimized with doping promoted by immersion in the acid solution for times longer than 50 s. Furthermore, as was showed that the diodes properties are dependent on the semiconductor...
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Ciência dos Materiais - FEIS
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Introdução: Sabe-se que a prática regular e sistematizada de atividade física é uma eficiente estratégia para evitar a deterioração cognitiva e funcional associada à Doença de Alzheimer (DA), uma doença progressiva, degenerativa e irreversível. Na população idosa os benefícios observados com a prática de exercícios físicos aeróbios já se encontram bem estabelecidos, contudo pouco ainda se sabe quanto à prática deste tipo de atividade em pacientes com DA. Em estudos realizados com modelo animal pode-se observar que o exercício físico aeróbio foi capaz de reduzir os níveis da proteína β-amilóide, sendo esta uma proteína característica da DA, que provoca degeneração no cérebro dos pacientes. A redução dos marcadores característicos da doença pode promover benefícios para os pacientes. Objetivos: Promover a prática de exercícios físicos para promoção/manutenção da saúde de pacientes com DA. Métodos: O estudo está sendo desenvolvido no PRO-CDA (Programa de Cinesioterapia Funcional e Cognitiva em Idosos com Doença de Alzheimer), projeto de Extensão do Departamento de Educação Física da UNESP – Campus Rio Claro, vinculado ao Núcleo Local UNESP-UNATI. O projeto atende atualmente 34 pacientes, divididos em dois grupos: Grupo Convívio Social e Grupo Exercício. O primeiro tem por objetivo desenvolver a adaptação do paciente à rotina do projeto. Já o segundo grupo busca promover os benefícios observados com a prática de atividade física nos pacientes participantes. Ambos os grupos realizam atividades três vezes na semana, com 60 minutos de duração cada sessão. O projeto conta com a participação de alunos de graduação, dos cursos de educação física, pedagogia e biologia, bem como discentes de pós-graduação da UNESP, além de aprimorandos graduandos e graduados dos cursos de educação física, fisioterapia, gerontologia e psicologia de outras universidades, que atuam sob a coordenação de docentes vinculados ao Departamento de Educação Física e de Educação. Resultados: Por se tratar de um protocolo de intervenção motora iniciado recentemente, o presente estudo ainda não apresenta resultados. Contudo protocolos de atividade física desenvolvidos anteriormente no PRO-CDA evidenciam melhora na realização de atividades de vida diária, manutenção das funções cognitivas, qualidade de vida e redução dos distúrbios de comportamento nos pacientes participantes. Espera-se que o protocolo de exercício físico aeróbio possa influenciar positivamente os participantes do projeto, com melhora na qualidade de vida, tanto de pacientes como de cuidadores, redução de sintomas depressivos, melhora dos distúrbios do sono e da condição motora.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Genética e Melhoramento Animal - FCAV
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Pós-graduação em Genética e Melhoramento Animal - FCAV