Applying laser tweezers to cylindrical vesicles of lipid bilayers induces an instability , which propagates down the vesicle leaving behind it a peristaltic state , which appears under the microscope as pearls on a string 在光镊的作用下，柱状膜表现出令人惊讶的动力学行为，即珠链状结构的形成及其发展后期的水珠运动现象。
We make up a simple model based on the microscopic mechanism of the membrane to investigate this phenomenon . the model proves reasonable after we quantify the velocity of the pearls drift slowly towards the laser trap 对于此动力学行为，本文从膜的微观结构出发，建立了一个简单的模型，解释了珠链状膜的形成以及光镊熄灭后水珠的运动。
At first we specialized in metal chains , now develop into many areas , like zinc alloy ( mold - opening , die - casting ) , leather ware , mobile phone straps , various hardware , various high - quality key rings , and chains made of brass , iron and aluminum , etc 由最初专业生产链条扩大到如今锌合金开模压铸、皮制品、手机链、珠链、各类皮件五金、各式中高档锁匙扣、及铜铁铝链条等多方面的发展。
