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我为什么要制造米粒大小的机器人

通过研究蚂蚁大小的昆虫的移动方式,Sarah Bergbreiter和她的团队制造的机器人小得不可思议,看起来就像机械化的爬虫……然后他们为机器人添加了动力引擎。演讲中,微型机器人研究进展会令你瞠目结舌,此外,你还会了解这些小机器人未来的三种用途。

2015-11-06 课时:7分钟

细胞大小究竟如何调控细胞增殖

Martin Raff (UCL) Part 1: Regulation of Cell Size

The size of an organ or organism depends mainly on the sizes and numbers of the cells it contains. In the first segment of my talk, I describe our work on cell size control in cultures of purified rat Schwann cells. Most proliferating cells grow before they divide, but it is not known how growth and division are co-ordinated to ensure that cells divide at an appropriate size. We have found that extracellular signals can control cell growth and cell-cycle progression separately and that the size of Schwann cells at division depends on the signalled rates of both cell growth and cell-cycle progression, rather than on a cell-size checkpoint that monitors cell size.

2016-03-24 课时:41分钟