【摘 要】
：
The mechanical properties of fluorescent microtubules (MTs) are probed with dual-optical tweezers system. The results indicate that the fluorescent MTs are much easier to be extended compared with those without fluorescence. Such MT can be extended by 30%
【机 构】
：
OpticalPhysicsLaboratory,InstituteofPhysics,ChineseAcademyofSciences,Beijing100080StateKeyLaboratory
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
The mechanical properties of fluorescent microtubules (MTs) are probed with dual-optical tweezers system. The results indicate that the fluorescent MTs are much easier to be extended compared with those without fluorescence. Such MT can be extended by 30% and force for breaking up it is only several piconewtons. Furthermore, we find that the breakup of the protofilaments is not simultaneous but step-by-step. Finally, the mechanism of the breaking is discussed.
其他文献
利用脉冲耦合神经网络(PCNN)模型融合点火像素点位置信息生成的二维条形码，实现镜像对称交通标志的分类识别。为了研究二维条形码的抗干扰性能，在待识别图像中加入椒盐噪声，并以不同分级数，采用R、G、B三个颜色空间进行处理，分析经过预处理前后形成的二维条形码抗干扰性能。针对国家标准道路交通标志图像库GB5768-1999中117个标志，其中45个黄色警告标志，43个红色禁令标志，29个蓝色指示标志进行实验，结果表明，二维条形码可以克服镜像对称标志无法区分的问题，并且抗干扰性能优于一维条形码，在R、G、B三个颜
Slow and superluminal light propagation in temporal nonlocal response Kerr media has been investigated. The group velocity, as low as tens of few centimeters per second, can be easily obtained by tuning the wavelength of a continuous-wave (CW) laser in a
Dispersion and dispersion slope compensation of 10-Gb/s pulses using microstructure fibers (MFs) is demonstrated experimentally. A 26-m MF is used to compensate the dispersion of 2-km standard singe mode fiber in a 20-nm range in C band. The experimental
激光圆弧扫描弯曲可实现圆弧槽形舱壁件无模具成形, 研究其曲面变形规律以及其曲面变形特征具有重要的工程应用意义。首先, 详细分析了扫描次数n、圆弧扫描半径R、板材宽度W以及扫描基准线至自由端长度L对矩形金属层合板曲面变形的影响。同时, 结合各参数对曲面变形作用效果及曲面变形量试验测量数据, 求得各参数下曲面变形量经验函数, 并对其变化规律及趋势进行分析。最后, 利用激光圆弧扫描弯曲策略进行了圆弧槽形舱壁件样件试制, 其中单段圆弧槽两侧壁曲率半径均值分别为84.51、86.77 mm。文中方法为矩形金属层合板
美国加利福尼亚大学劳伦斯利弗莫尔国家实验室物理学家所发展的一项新技术如获成功，那末激光制造微型集成电路的技术立即可以得到简化。这项新技术可以废除诸如掩模和光敏材料等许多制造微型集成电路所需要的器具。
在化学破坏下能态过程中建立粒子数反转的思想方面，文献[1]提出了在不稳定分子，如氢化汞分子的基态中的束缚-束缚跃迁上获得激光振荡的设想。图1示出HgH(A2Π1/2-X2Σ1/2跃迁的激光器工作图。由于必须考虑大量的过程和缺乏稠密气体中HgH分子动力学方面的信息，这种激光器的定量分析工作是困难的。在研究气体放电Hg-H2等离子体的辐射光谱行为与它的密度和组分的关系时，可能获得所要求数据的重要部分。本文报导这些研究结果。
We briefly outline a modelling strategy, combining quantum chemistry and molecular dynamics simulations, for obtaining macroscopic nonlinear optical coeffcients in guest-host systems like chromophores in solutions or in polymer matrices. The parameters re
报道了给体-受体电子转移型材料zinc-tetraphenylbenzoporphrin zinc-tetrapheyl benzotribenzoporphrin\phydroxybenzaldhyde\poly (methyl) methacrylate 的光子选通多重烧孔过程。 结果表明要获得高质量的多重光谱孔，从短波往长波的逐次烧孔更为有效。其影响来自与波长有关的光致填孔现象。造成该填孔的主要机制是赝声子边带的作用。理论拟合与实验结果相符。
A spectroscopic method to determine thickness of quartz wave plate is presented. The method is based on chromatic polarization interferometry. With the polarization-resolved transmission spectrum (PRTS) curve, the phase retardation of quartz wave plate ca