Xing Jianhua, Bai Fan, Berry Richard, Oster George
Departments of Molecular and Cell Biology and Environmental Science, Policy and Management, University of California-Berkeley, Berkeley, CA 94720-3112, USA.
Proc Natl Acad Sci U S A. 2006 Jan 31;103(5):1260-5. doi: 10.1073/pnas.0507959103. Epub 2006 Jan 23.
Many swimming bacteria are propelled by flagellar filaments driven by a rotary motor. Each of these tiny motors can generate an impressive torque. The motor torque vs. speed relationship is considered one of the most important measurable characteristics of the motor and therefore is a major criterion for judging models proposed for the working mechanism. Here we give an explicit explanation for this torque-speed curve. The same physics also can explain certain puzzling properties of other motors.
许多游动细菌由旋转马达驱动的鞭毛丝推动。这些微型马达中的每一个都能产生可观的扭矩。马达扭矩与速度的关系被认为是该马达最重要的可测量特性之一,因此是判断所提出的工作机制模型的主要标准。在此,我们对这条扭矩 - 速度曲线给出明确解释。同样的物理原理也能解释其他马达的某些令人困惑的特性。