Time course characteristics of agt mrna and protein expressions in different arterial tissues induced by simulated microgravity in basilar arterial tissue , agt mrna expression increased with the extension of simulated microgravity durati 不同部位血管组织agtmrna及蛋白表达的时程特征模拟失重大鼠基底动脉组织tm
But how the distributions of the velocity in the cabin is not known for the restriction of the conditions , and to solve this problem a numerical analyses of gas flow in one of the cabins under microgravity environment are carried out 由于实验条件及实验原理的限制,不能从总体上了解整个密封舱内的流动情况,数值计算则可以弥补这一缺陷。
An experimental test system for the direct methanol fuel cell under microgravity environment was set up . the visualization research platform was made up of the test system and the transparent dmfc as well as the drop tower 该测试系统与作者自行设计的透明燃料电池以及落塔系统共同构成了微重力环境下直接甲醇燃料电池阳极流道可视化的研究平台。
The researchers found 91 of 99 genes that activate t - cells to destroy invaders , such as viruses , did not turn on in the simulated microgravity , newscientist . com said . " there is a specific signal pathway that is not working in the absence of gravity , " says hughes - fulford 研究人员发现,在激活t细胞,以使其摧毁“入侵者”如病毒等的99种基因中,有91种在微重力环境下无法进入工作状态。
Studies on the mechanisms of postflight cardiovascular deconditioning and its countermeasures have important theoretical and practical implications to fully unravel the cardiovascular effects of microgravity and to realize the manned - spaceflight project in the new millennium 航天飞行后心血管失调发生机理及其对抗措施研究对阐明微重力心血管影响基本规律及实现新世纪载人航天目标具有重要的理论与实际意义。
Previous findings from our laboratory have demonstrated that simulated microgravity may result in atrophic changes with depressed vasoconstrictor responsiveness in hindquarter vessels , and hypertrophic changes with enhanced vasoconstrictor responsiveness in cerebral arteries of rats 本实验室前期工作已发现,模拟失重可引起大鼠后身动脉血管发生萎缩性改变和收缩反应性降低,而脑部血管则发生肥厚和收缩反应性增强。
Other than weightlessness , the only other situation that severely diminishes t - cell function is hiv infection . millie hughes - fulford , a medical professor at the university of california - san francisco , and colleagues subjected human immune cells to a device that simulates microgravity 据合众社10月17日报道,在研究过程中,美国加州旧金山大学的医学教授米莉休斯-富尔福德与其同事将人体免疫细胞放入一个模拟微重力状态的装置中。
A detailed analysis on the characteristics of the solution of the void fraction matched model for the slug - to - annular flow pattern transition at microgravity condition , which is based upon the drift - flux raletionship of slug flow and the momentum balance relationship of smooth annular flow , is presented 摘要对基于微重力条件下,气液两相弹状流滑移流率关系和光滑环状流动量平衡关系的弹环状流转换空隙率匹配模型的解的特徵,进行了深入分析。
The objective of this thesis is to study the problems about ground modeling experiments on the convection heat transfer in the hermetic cabins of two man - made satellites under microgravity , and build up a set of experimental system for the ground modeling - cool experiment - based on the theoretical analysis of the effects of gravity on the flow and heat transfer in the hermetic cabins 航空航天技术领域中,如何在地面重力环境中实验模拟空间微重力条件下的流动与传热,具有重要意义,但至今尚未得到很好的解决。本文的目的就是研究微重力环境下卫星密封舱内对流换热的地面模拟实验问题。
By collecting and evaluating the kinematic and kinetic data of astronauts in space , it becomes possible to characterize human motor strategies , postural behavior in weightlessness , improve the design of orbital modules , help maintain a quiescent microgravity environment for acceleration - sensitive science experiments , and optimize the human operative capabilities during long - duration space missions 通过收集和评测航天员在太空中活动的动力学和运动学数据,可以很好的刻画人类在失重情况下的运动策略和姿态行为;改善轨道舱的设计;保持静止的微重力环境,以便于进行那些对加速度敏感的科学实验;最优化长时间太空任务中人类的操作能力。