应理论物理交流平台邀请,桂林电子科技大学杨靖教授于2016年6月17日下午来我院作学术报告,具体信息如下。
报告题目:Periplasmal physics: The rotational dynamics of spirochetal flagella
报告人:杨靖教授 桂林电子科技大学
报告时间:2016年6月17日(星期五)下午2:30
报告地点:格致楼5004报告厅
Abstract:Spirochetes are distinguished by the location of their flagella, which reside within the periplasm: the tiny space between the bacterial cell wall and the outer membrane. In Borrelia burgdorferi (the causative agent of Lyme disease), rotation of the flagella leads to cellular undulations that drive swimming. Exactly how these shape changes arise due to the forces and torques acting between the flagella and the cell body is unknown. By applying low-Reynolds number hydrodynamic theory to the motion of an elastic flagellum rotating in the periplasm, we show that the flagella are most likely separated from the bacterial cell wall by a lubricating layer of fluid. We obtain analytical solutions for the force and torque on the rotating flagellum through lubrication analysis, as well as through scaling analysis, and find that the results are in close agreement numerical simulations.
报告人简介:杨靖,桂林电子科技大学教授。1992年毕业于西安交通大学锅炉设计与制造专业。之后在甘肃白银有色金属公司任工程师。1996年考回西安交通大学读研究生,2012年元月在美国康涅狄格大学取得生物医学科学博士。博士毕业后,先后在美国的Harverford College(哈弗福德学院) 做博士后,美国宾州大学做访问学者,法国巴黎高等师范做博士后。2015年6月应聘到桂林电子科技大学。主要从事生物物理,细菌游动等方面的基础研究。发表论文10余篇,其中PRL2篇。