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首页> 外文期刊>Авиаκосмичесκая и эκологичесκая медицина >INTRICATE DYNAMICS OF RED BLOOD CELLS: TOWARDS A BOTTOM-UP APPROACH OF BLOOD FLOW AND APPLICATION TO MICROGRAVITY
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INTRICATE DYNAMICS OF RED BLOOD CELLS: TOWARDS A BOTTOM-UP APPROACH OF BLOOD FLOW AND APPLICATION TO MICROGRAVITY

机译:红色血液的动态动力学:朝着血液流动的自下而上的方法及其在微重力中的应用

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摘要

After nearly a century of research on blood, understanding of the basic blood flow mechanisms at the cellular level (at the scale of red blood cells, platelets, etc.) is still an open issue.Blood is a complex fluid: its flow properties mix mi-croscales (represented by red blood cells - RBCs) and the macroscale (the scale of the global flow).Understanding of blood flow should emerge from a bottom-up approach, RBCs interact in a nontrivial manner among each other and with the blood vessel walls. Blood flow resistance along with several blood diseases are regulated by the endothelial layer covering the interior of blood vessels. The endothelium is constantly stimulated by blood shear stress which triggers its activity. However, under microgravity shear stresses are reduced and affect the stimulation of the endothelium, an essential cause for cardio-vascular dysfunctions, leading ultimately to blood diseases, such as thrombosis. Here we describe some intricate dynamics of RBCs and their effect on blood rheology. We shall describe briefly the problematic of endothelium and the first basic questions that we have raised are in a concerted fashion between physics and life science.
机译:经过近一个世纪的血液研究,在细胞水平(在红细胞,血小板等的水平)上对基本血液流动机制的理解仍然是一个悬而未决的问题。血液是一种复杂的流体:其流动特性混合在一起微观尺度(由红细胞-RBC表示)和宏观尺度(全球血流的规模)。对血流的理解应该是自下而上的方法,RBC在彼此之间以及与血液之间以不平凡的方式相互作用血管壁。血流阻力以及几种血液疾病均由覆盖血管内部的内皮层调节。血液剪切应力不断刺激内皮,从而触发其活性。然而,在微重力下,剪切应力减小并影响内皮的刺激,这是引起心血管功能障碍的根本原因,最终导致血液疾病,例如血栓形成。在这里,我们描述了一些复杂的RBC动态及其对血液流变学的影响。我们将简要描述内皮的问题,而我们提出的第一个基本问题是物理学与生命科学之间的协调一致。

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