445 resultados para Distúrbios do metabolismo do cálcio
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A estruturação dos processos cognitivos, a partir das relações do sujeito com o meio, constitui a base para a aprendizagem. Dentre os diversos processos cognitivos, a atenção representa um mecanismo imprescindível para a compreensão e incorporação de novos conteúdos. Distúrbios do processo atencional, além de comprometer a aprendizagem, estendem-se para comportamentos de hiperatividade. Os distúrbios da atenção e a hiperatividade - fenômenos intimamente correlacionados - contribuem para que o sujeito tenha dificuldades significativas em outras funções cognitivas, como linguagem, cálculo, capacidade de reconhecimento e de planejamento, habilidade de autocorreção dos comportamentos, etc. O desempenho pedagógico por parte do professor, integrado à ação interdisciplinar de outros profissionais habilitados e de familiares, constitui uma estratégia promissora na abordagem e orientação da criança com distúrbios da atenção e hiperatividade.
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O presente trabalho trata de alguns aspectos básicos referentes aos distúrbios de atenção a partir das contribuições da Neuropsicologia. São inseridos elementos relacionados com a interferência do padrão de atenção na estruturação cognitiva e com o conceito de hiperatividade. Como conclusão, discutimos a necessidade da ação interdisciplinar de profissionais voltados para a reabilitação do sujeito portador dos distúrbios da atenção.
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Pós-graduação em Ciências Biológicas (Farmacologia) - IBB
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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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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Doenças Tropicais - FMB
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A presente invenção refere-se a composições varistoras à base de óxidos metálicos, mais particularmente à base de óxido misto de cálcio, cobre e titánio (CCTO), com a presença, ou não, de titanato de cálcio (CaTiO~ 3~), para conformação de blocos cerâmicos varistores (resistores não-lineares).
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Os dentifrícios fluoretados são efetivos no controle da cárie dentária, porém aumentam a prevalência de fluorose dentária (diminuição da mineralização do esmalte e dentina do dente), quando utilizados em crianças menores de 6 anos de idade. A presente invenção provê uma formulação dentifrícia com reduzida concentração de flúor (500 ppm F) de forma a aumentar a eficácia do produto quando comparado aos dentifrícios comerciais já testados (1000 a 1500 ppm F) e diminuir o risco de ocorrência da fluorose dentária.
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A presente invenção refere-se a uma droga antiulcerogênica, mais particularmente, a uma droga que compreende uma fração ativa da planta Casearia sylvestris como componente eficaz. De forma particular a invenção trata de uma droga útil no tratamento de distúrbios do trato gastrintestinal, principalmente no tratamento de úlcera gastroduodenal, sendo que apresenta ação citoprotetora, age tanto em úlceras leves como moderadas e graves e, sendo seletiva, não apresenta ação abortiva.
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The purpose of this study was to evaluate the leukocyte count and the oxidative metabolism of neutrophil in Saanen goats during periods of pregnancy, parturition and postpartum. Were used 20 Saanen goats, clinically healthy and serologically negative for caprine arthritis encephalitis virus (CAEV). Blood samples were collected by jugular venipuncture 49 (M1), 42 (M2), 35 (M3), 28 (M4), 21 (M5), 14 (M6), seven (M7), three (M8) days before the parturition, on the day of birth (M9), three (M10) and seven (M11) days postpartum, for the leukocyte count, and serum for cortisol, estradiol and progesterone determination. From 28 days (M4) before parturition until seven days postpartum (M11) blood samples were collected for evaluation of oxidative metabolism of neutrophils by the nitroblue tetrazolium reduction test (NBT). The results showed that at parturition day there were an increase in cortisol and estradiol levels and a decrease in progesterone serum, neutrophilic leukocytosis and left shift slight, decrease of lymphocytes, increase in the neutrophil: lymphocyte, eosinopenia, monocytosis and basophilia. There was a neutrophilic leukocytosis and an increase in the neutrophil: lymphocyte on the seventh day postpartum. There were not significant alterations in oxidative metabolism of neutrophils during pregnancy, parturition and postpartum. It was concluded that parturition causes an elevation in cortisol and estradiol levels and a decrease in progesterone serum determining a neutrophilic leukocytosis and left shift slight, with a reduction of lymphocytes, increase in the neutrophil:lymphocyte, eosinopenia, monocytosis and basophilia. Neutrophilic leukocytosis, increase in the neutrophil: lymphocyte and fibrinogen are detected on the seventh day postpartum. Pregnancy, parturition and the postpartum do not change the oxidative metabolism of neutrophils evaluated by NBT reduction test.
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The intake and performance of lambs fed with sugarcane silages treated with whitewash and chloride sodium were evaluated. Seven treatments were used: untreated silage (control); silages treated with 0.5; 1.0 and 1.5% of CaO (whitewash); and silages treated with 0.5; 1.0 and 2.0% of NaCl, with four replicates per treatment. The animals were fed a higher amount of dry matter and total digestible nutrients when the sugarcane silages were treated with 0.5% of NaCl, 1.0 and 1.5% of CaO. The intake of neutral detergent fiber and crude protein increased when the lambs were fed silages treated with 0.5% of NaCl and 1.0% of CaO. The average daily gain did not differ among treatments. The inclusion of 0.5% of sodium chloride and 1.0% of whitewash in sugarcane silages increased the intake and improved the performance of lambs.
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The present study aimed to evaluate cardiac and lipoperoxidation markers in horses subjected to low intensity and long duration (TLD) exercise test, before and after vitamin E supplementation. For this purpose, 10 horses were used, subjecting them to the first TLD with a workload based on individual maximal oxygen uptake (VO2max). Then, horses received vitamin E (dl-alpha-tocopherol) during 59 days at a daily oral dose of 1,000IU, and thereafter they performed a second TLD with the same protocol as the first. Blood samples were collected to determine plasma malondialdehyde (MDA) as an index of lipoperoxidation, serum cardiac troponin I (cTnI) and creatine kinase MB isoenzyme (CK-MB) as cardiac markers. As a result of the exercise, there was no significant increase in MDA or cTnI, but serum CK-MB increased suggesting myocardial stress. The supplementation was able to minimize reactive oxygen species production, as evidenced by lower concentrations of MDA at all times evaluated, but it didn't cause protective effect on the myocardium. It was concluded that the low intensity and long duration exercise promoted light myocardial stress in horses and vitamin E supplementation reduced lipoperoxidation.
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Through the polymeric precursor method were synthesized samples Ca0.98Sr0.01X0.01TiO3 (X= Eu3+, Sm3+ and Pr3+), which under different heat treatments were obtained with levels of distinct structural order-disorder. The synthesized materials were characterized by X-ray diffraction, confirming the obtaining of ahomogeneous material with perovskite-type orthorhombic structure. This characterization allowed evaluating the average crystallite size of the samples that varies depending on the rare-earth ion. The results of photoluminescence emission confirmed the presence of this optical phenomenon at room temperature and its relationship to the level of order-disorder structural system. The photoluminescence emission is more intense in samples annealed at 500 ° C (independent on the dopant ion), the variation of the dopant influence on the emission intensity due to charge transfer between the host and emitting rare-earth ion, where the doped with Pr3+ ion has charge transfer more efficient and hence more intense emission in the photoluminescence. Another factor that favors the optical property of the samples is the charge compensation, as it contributes to the increase in structural disorder due to formation of Ca2+ vacancies.
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The objective of this work was to evaluate the effects of kinetin and calcium applications on the physiologic and productive traits of soybean plants, subjected to drought and shade conditions, at flowering. A randomized complete block design was used, in a split-plot arrangement, with four replicates. Soybean plants cultivated in 38 dm³ pots were sprayed with calcium and kinetin, alone or mixed, and subjected to drought and shade during 12 days. After stress period, plants were cultivated under appropriate water and light availability. Calcium and kinetin application resulted in maintenance of the relative water content after four days of drought beginning. Membrane damage, measured at the end of stress period, was lower in plants sprayed with calcium and kinetin. CO2 assimilation diminished by stress condition, mainly under drought, and grain yield decreased at the same intensity in both environments.