Capillary Rise
Mostrando 1-12 de 45 artigos, teses e dissertações.
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1. Estimativa de propriedades hidráulicas de solos a partir do ensaio de ascensão capilar / Estimating the hydraulic properties of soils from capillary rise test
This study evaluates the potential of capillary rise test and a parameter optimization technique to estimate soil hydraulic parameters. The capillary rise is a simple and expedite test that is conditioned by soil hydraulic properties. In the mathematical representation of the capillary rise we used the model of Terzaghi (1943), who considered that saturated
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012
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2. Mechanisms underlying the differentiation of stem cells from human exfoliated deciduous teeth (SHED) into odontoblasts and endothelial cells / Mecanismos envolvidos na diferenciação de células-tronco de dentes decíduos exfoliados humanos (SHED) em odontoblastos e células endoteliais
Dental pulp tissue engineering aims to replace the inflamed or necrotic pulp by a healthy and functionally competent tissue able to form new dentin in order to repair lost structure. The purposes of this work were: to evaluate the differentiation ability of stem cells from human exfoliated deciduous teeth (SHED) into functional odontoblasts, showing the form
Publicado em: 2009
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3. Water balance in the soil with maize under no tillage system and different nitrogen levels / Balanço de água no solo com milho sob sistema plantio direto e diferentes doses de nitrogênio
The objective of this work was: a) to evaluate the processes of the water balance in the soil with maize plants, under no tillage system (NTS) and different nitrogen levels, in succession to cover crops; b) to verify possible alterations of some soil physico-hydric properties due to the no tillage system practice. The experiment was carried out in Piracicaba
Publicado em: 2007
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4. Citrus orchard water use in a latossolo vermelho amarelo (oxisol). / Consumo de água por cultura de citros cultivada em latossolo vermelho amarelo.
The agricultural yield and, particularly in this study, the citrus yield, associated to weather and soil conditions, is dependent on the presence of water and nutrients in the soil in appropriate amounts along the time. Its lack or excess is a limiting factor to the production, determining in many cases its decrease. The objective of the present work was to
Publicado em: 2003
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5. Avaliação dos efeitos hemodinâmicos, respiratórios, metabólicos e sedativos da dexmedetomidina isolada ou associada à tiletamina-zolazepam em cães. Estudo experimental / Hemodinamic, respiratory, metabolic and sedative effects evaluation of dexmedetomidine alone or associated with tiletamine-zolazepam in dogs. Experimental study
The aim of the present study was to evaluate hemodynamic, respiratory and metabolic alterations, the quality of induction and recovery of the animal, as well as sedation and muscular relaxation promoted by the use of dexmedetomidine alone or associated to tiletamine-zolazepam. Eighteen healthy male and female mongrel dogs were used and randomly assigned to t
Publicado em: 2003
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6. Effects of increased and decreased tissue pressure on haemodynamic and capillary events in cat skeletal muscle.
1. The controversial problem concerning the unusual haemodynamics of the deranged circulation during increased hydrostatic tissue pressure (PT) was elucidated by detailed studies of arterial, capillary and venous functions in cat skeletal muscle exposed to graded experimental changes of PT over a wide range. 2. The results indicated that the impaired circula
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7. Blood flow dependence of postglomerular fluid transfer and glomerulotubular balance.
The rate of blood flow entering a capillary network can, in some vascular systems, regulate capillary surface area and the rate of fluid and solute transfer. To determine whether such a mechanism exists in the renal peritubular capillary, we performed micropuncture studies in 28 rats during relatively low and high efferent arteriolar blood flow (EABF). High
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8. Influence of experimental hyperglycemia on microvascular blood perfusion of pancreatic islet isografts.
The influence of hyperglycemia on the microvascular blood perfusion of pancreatic islet isografts of Syrian golden hamsters was analyzed by direct visualization of the islet's microvasculature by means of in vivo fluorescence microscopy. The experiments were performed using the hamster dorsal skinfold preparation, which allows for quantitative analysis of th
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9. Haemodynamic and electrocardiographic accompaniments of resting postprandial angina.
The early postprandial changes in 10 patients with angiographically proven coronary artery disease and history of postprandial angina were studied by the continuous recording on magnetic tape of the electrocardiogram and haemodynamic variables. The significant changes 20 minutes after a meal not followed by angina included increases in cardiac index and stro
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10. Effect of low dose beta blockers on atrial and ventricular (B type) natriuretic factor in heart failure: a double blind, randomised comparison of metoprolol and a third generation vasodilating beta blocker.
OBJECTIVES--This study examines the acute effects of two differing beta adrenergic blocking agents (metoprolol and a third generation vasodilating beta blocker) on plasma concentrations of atrial natriuretic factor (ANF), brain (ventricular) natriuretic factor (BNF), and haemodynamic variables in patients with heart failure. SETTING--University teaching hosp
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11. Continuous amperometric monitoring of glucose in a brittle diabetic chimpanzee with a miniature subcutaneous electrode
The performance of an amperometric biosensor, consisting of a subcutaneously implanted miniature (0.29 mm diameter, 5 × 10−4 cm2 mass transporting area), 90 s 10–90% rise/decay time glucose electrode, and an on-the-skin electrocardiogram Ag/AgCl electrode was tested in an unconstrained, naturally diabetic, brittle, type I, insulin-dependent chimpanzee.
The National Academy of Sciences.
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12. Helical parameters of DNA do not change when DNA fibers are wetted: X-ray diffraction study.
We have measured the helical parameters of DNA in concentrated solutions by x-ray fiber diffraction methods. Fibers of the sodium salt of DNA were swollen with water within capillaries; the capillary served to limit water uptake, slowing dissolution. Samples containing up to 80% water gave essentially a B-form diffraction pattern and had virtually the same