Changes in velocity profile according to blood viscosity in a microchannel     

Eunseop Yeom  Yang Jun Kang  Sang-Joon Lee 《Biomicrofluidics》2014,8(3)

Red blood cells (RBCs) are important to dictate hemorheological properties of blood. The shear-thinning effect of blood is mainly attributed to the characteristics of the RBCs. Variations in hemorheological properties alter flow resistance and wall shear stress in blood vessels. Therefore, detailed understanding of the relationship between the hemorheological and hemodynamic properties is of great importance. In this study, blood viscosity and blood flow were simultaneously measured in the same microfluidic device by monitoring the flow-switching phenomenon. To investigate blood flows according to hemorheological variations, the flow rate of blood samples (RBCs suspended in autologous plasma, dextran-treated plasma, and in phosphate buffered saline solution) was precisely controlled with a syringe pump. Velocity profiles of blood flows were measured by using a micro-particle image velocimetry technique. The shape of velocity profiles was quantified by using a curve-fitting equation. It is found that the shape of the velocity profiles is highly correlated with blood viscosity. To demonstrate the relationship under ex vivo conditions, biophysical properties and velocity profiles were measured in an extracorporeal rat bypass loop. Experimental results show that increased blood viscosity seems to induce blunt velocity profile with high velocity component at the wall of the microchannel. Simultaneous measurement of blood viscosity and velocity profile would be useful for understanding the effects of hemorheological features on the hemodynamic characteristics in capillary blood vessels.  相似文献   

“90后”大学生价值观存在的问题分析     

马金莲  康小丽 《科教文汇》2014,(25):16-17

本文通过问卷调查的方式对兰州高校“90后”大学生价值观进行了全面详细的了解分析,得出“90后”大学生价值观存在的问题主要表现为价值追求功利化、价值取向本位化及价值选择矛盾化等。  相似文献   

语义网本体在离散数学课程教学中的应用     

康达周 《科教文汇》2014,(7):58-60

语义网本体广泛应用于知识工程、人工智能以及计算机科学领域,在教育、科研等方面也有重要作用。针对当前离散数学课程教学中存在的内容广、概念多、高度抽象和理论化等困难,利用本体作为辅助离散数学课程教学的重要工具,辅助学生理解、应用和实践离散数学知识,提出本体在教学过程中不同方面所起的作用以及教学思路与方法,得到了很好的教学效果和学生反馈。  相似文献   

制冷空调专业“专业软件应用”课程建设探讨     

康彦青  尚雪梅  郑爱平 《科教文汇》2014,(30):79-80

分析了制冷空调专业计算机工程辅助设计方面目前存在的问题,提出了解决方案,探讨了该专业＂专业软件应用＂课程建设的目的、课程建设的方法及其效果。  相似文献   

企业科技期刊与企业科技进步——《江汉石油科技》办刊实践略谈     

康新荣 《编辑学报》2001,13(Z1):87-88

分析企业科技期刊与企业科技发展的关系,论述企业科技期刊在推动企业科技进步、促进企业经济发展中的作用.针对企业科技文化的现状,提出了办好企业科技期刊的建议.  相似文献   

论体育院校学报编辑选稿的标准及其思维方式     

叶成万  康昌发 《武汉体育学院学报》1996,(3)

选稿的标准对编辑的选稿的思维活动过程，具有明确的指向性；而编辑选稿的科学的思维方式，对全面执行选稿标准具有重要作用。  相似文献   

通过报刊阅读提高英语学习兴趣的分析报告   总被引：1，自引：0，他引：1  

康洁平  吕晶晶 《湖北函授大学学报》2006,19(1):52-54

中国要了解世界,世界要了解中国,大量的信息必须通过新闻媒体进行传递,因此英文报刊是我们学习、掌握现代英语最实用的途径之一。本文通过学生14周的课外阅读英文报刊活动,了解到学生对读报的认可度,读报活动中的困难以及期望的解决对策。得出结论:英语报刊集现代英语之大成,有利于学生按需索取,是学习和掌握现代英语的重要途径之一。  相似文献   

论武术科研的创新意识   总被引：1，自引：1，他引：0  

康戈武 《搏击·武术科学》2005,2(4):1-4

文章对武术科研的创新意识进行了分析,结论认为:武术科研创新意识中的突破思维、超前思维、开拓思维、综合思维都可以帮助我们在已有研究的基础上,找出创新的切入点、理出创新的思路、完善创新的方案.创新意识可以指导武术科研沿着创新之路不断前进,从而不断地用创新的科研成果促进武术事业的持续发展.  相似文献   

家庭体育与人的精神资本培育     

康英萍 《西北成人教育学报》2009,(6):51-52

家庭教育以培养走向社会、参与社会发展为最终目标。这一目标的确定是社会发展的必然结果,人的成长的必然需要。家庭体育在个人精神资本形成过程中起重要作用。从而为自己的成功,为社会的发展做出更大的贡献。  相似文献   

Treatment of Wet FGD Wastewater by a Modified Chemical Precipitation Method Using a Solid Powder Reagent     

Yong Kang  Jia Lu  Jing Guo 《天津大学学报(英文版)》2017,23(2):110-121

This research focused on developing a modified chemical precipitation(MCP) method for treating wet flue gas desulfurization(FGD) waste water by adding a solid powder reagent directly. Simulated wet FGD wastewater was treated by MCP method in simulation experiments.Optimization experiments were carried out with the help of response surface methodology(RSM) and central composite design(CCD) to evaluate the effects and the interactions of experimental variables, including reagent dosage, temperature and pH value. The optimal reagent dosage, temperature and pH value were 3018.0 mg/L,40.5 °C and 5.7, respectively. The RSM was demonstrated as an appropriate approach for the optimization of wet FGD wastewater treatment with the MCP method. A comparative study between the MCP method and the traditional chemical precipitation(TCP) method on raw wet FGD wastewater treatment was conducted. Results indicate that the MCP had less reagent dosage and variety than the TCP method had. Thus, the MCP method had a lower cost.  相似文献