Blood Viscosity
Mostrando 13-24 de 96 artigos, teses e dissertações.
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13. Aplicação da pinça optica para o estudo da deformabilidade das hemacias
The deformability of erythrocytes is a critical determinant of blood flow in microcirculation. By capturing red blood cells with optical tweezers and dragging them through a viscous fluid we were able to measure their overall elasticity. Laser optical tweezers, based on photon momentum transfer, have been used successfully in a variety of biological applicat
Publicado em: 2003
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14. Caracterização de extratos de soja obtidos de grãos, farinha integral e isolado proteico visando a formulação e avaliação biologica (em coelhos) de bebida funcional a base de extrato de soja e polpa de pessegos / Characterization of soymilk obtained from soybean, whole soy flour and isolated soy protein, for the formulation and biological evaluation (in rabbits) of a functiolÍal beverage composed of soymilk and peaches pulp
Beverages based on soymilk and fruit juice have been an excellent option for the utilization and introduction of soy in the human diet. To the consumers, besides nutritional and functional benefits attributed to the soy, the beverages must attend the expected sensorial characteristics, keeping the original constituents of the raw materiais. Soy extracts (soy
Publicado em: 2003
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15. Introdução de um novo marcador laboratorial de atividade inflamatoria associada a infecção
Clinical and experimental evidence have demonstrated that proinflammatory interleukines (TNF-?, IL-1,IL-6, IL-8) are the most important mediators in the pathogenesis of the Sepsis Syndrome. They lead to the fluctuation of the white blood cells, a rise in the acute phase proteins as CRP, and of consequence, the alteration in the viscosity of the blood leading
Publicado em: 1999
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16. Estudo das propriedades físico-químicas e de textura de chocolates / Physicochemical and textural properties study of chocolates
Theobroma cacao is the scientific name of the cocoa, suggested in the XVIII century by Linné. However, the history of the chocolate begins before Aztecs and Mayans Mesoamerican civilizations, and the new mentioned Olmecs, among other groups. The Olmecs, a culture existing some three millennia ago, were possibly the first ones to use the chocolate. In some f
Publicado em: 1997
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17. Paraproteinemia: blood hyperviscosity and clinical manifestations.
Many of the clinical features of paraproteinemia result from impairment of blood flow through the vascular tree because of blood hyperviscosity. Studies were carried out in 65 patients with serum paraproteins (31 with IgG, 25 with IgM, and 9 with IgA) to examine the relationship between the blood viscosity and the frequency of selected clinical features. The
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18. Blood viscosity in multiple sclerosis
Native blood from healthy subjects and from some pathological cases showed a fall in viscosity after the first passage through a stainless steel capillary viscometer in 97% of tests. Fortyfive blood samples from 27 active multiple sclerosis patients were tested. Blood from 19 of these patients showed no fall in viscosity.
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19. Abnormal blood viscosity and haemostasis in long-standing retinal vein occlusion.
Blood viscosity and several haemostatic factors were measured in 42 patients with long-standing retinal vein occlusion and 33 control subjects. Blood viscosity, haematocrit, plasma viscosity, fibrinogen, fibrinopeptide A, and beta-thromboglobulin were increased in the 20 subjects with capillary nonperfusion or new vessels, but not in the 22 subjects without
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20. Haemorheological changes in patients with retinal vein occlusion after isovolaemic haemodilution.
In 83 patients with central retinal vein occlusion and branch vein occlusion we measured the haematocrit (HCT), plasma viscosity (PV), red cell aggregation (RCA), red cell filterability (RCF) and apparent whole blood viscosity (WBV). A control group (n = 41) was matched for sex, age, and cardiovascular risk factors. Measurements were performed before and aft
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21. The flow of human blood through capillary tubes.
1. The current interpretation of in vivo blood flow is mainly based on the Hagen-Poiseuille equation, although blood is not a Newtonian fluid. In this paper, experimental pressure-flow curves of blood are explained on the basis that the viscosity of the blood is the sum of two components, a Newtonian viscosity term, N, and an anomalous viscosity term equal t
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22. Influence of age, systemic blood pressure, smoking, and blood viscosity on orbital blood velocities.
The influence of multiple systemic factors upon the blood velocities obtained from the orbital circulations was investigated. The velocities obtained by colour Doppler imaging from the ophthalmic artery, central retinal artery, and vein from 95 ophthalmologically healthy volunteers were analyzed. The effects of age, systemic blood pressure, and smoking habit
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23. Blood and plasma viscosity measurements in patients with glaucoma.
Blood viscosity at 10 shear rates, plasma viscosity, packed cell volume, plasma fibrinogen, serum alpha 2-macroglobulin, and serum proteins were measured in 83 patients with low-tension glaucoma (LTG) and 23 patients with 'high-tension glaucoma' (HTG: at least one IOP reading above 40 mmHg) and compared with those in 50 controls. Blood and plasma viscosity v
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24. Hypoxic viscosity and diabetic retinopathy.
Diabetic and sickle retinopathy have features in common--for example, venous dilatation, microaneurysms, and capillary closure preceding neovascularisation. Bearing in mind that haemoglobin in poorly controlled diabetes is abnormal and that extremely low oxygen tensions (known to cause sickling) exist in the healthy cat retina, we wished to explore the possi