相对调和映照与光滑映照的变分

相对调和映照即为满足守恒律的映照。本文研究了相对调和映照的复合性质及它们与相对仿射映照之间的关系,并把稳定调和映照的一些不存在性定理对相对调和映照作了推广。     

异种DNA对胚胎发育的影响

有平衡器之东方蝾螈的DNA和无平衡器之黑斑蛙DNA当分别注射至黑斑蛙的受精卵内时.两者都能使受注射卵发育成的有些蝌蚪在左鳃盖上具有类似平衡器的突出物.基于这些事实,可以推论蝌蚪的类似平衡器的突出物既不是由于遗传转化,也不是平衡器的诱导而是DNA对胚胎发育的非特异性效应.     

储存环高频剔除系统

 介绍了用于电子储存环部分填充和非均匀填充的一种实验装置,它利用储存环中电子运动所具有的横向自由振荡和束团脉冲的时间结构这一特性,采用外加激励的方法使其产生共振,从而使得储存环中部分束团中的电子丢失,形成储存环的部分填充和非均匀填充。还扼要介绍了用高频剔除系统在储存环上实现不同填充方式时的束流积累结果。     

双重演示效果"固体热胀冷缩演示仪" 设计与实践

介绍一款双重演示效果"固体热胀冷缩演示仪",该仪器在演示效果的显著程度和综合性知识含量两方面较现有演示仪有实质性突破.     

Structural Stability of CaCuMn6O12 under High Pressure and Low Temperature

In situ high pressure energy-dispersive x-ray synchrotron radiation diffraction and resistance experiments are carried out on CaCuMn6O12. Its crystal structure is stable in the measured pressure range. The equation of state of CaCuMn6O12 is obtained from the V/Vo - P relationship （V and Vo are the volumes at pressure P and at atmosphere）. The bulk modulus Bo is calculated based on the Birch-Murnaghan equation. Low temperature x-ray diffraction shows no phase transition occurring down to 160K.     

Near-Field Fluorescence and Topography Characterization of a Single Nanometre Fluorophore by Apertureless Tip-Enhanced Scanning Near-Field Microscopy

Tip-enhanced near-field fluorescence and topography characterization of a single nanometre fluorophore is conducted by using an apertureless scanning near-field microscopy system. A fluorophore with size 80hm is mapped with a spatial resolution of 10hm. The corresponding near-field fluorescence data shows significant signal enhancement due to the apertureless tip-enhanced effect. With the nanometre spatial resolution capability and nanometre local tip-enhanced effect, the apertureless tip-enhanced scanning near-field microscopy may be further used to characterize a single molecule by realizing the local near-field spectrum assignment corresponding to topography at nanometre scale.     

Manipulation of Particles with Counter-Propagating Evanescent Waves

Two counter-propagating evanescent beams are used to align and manipulate polystyrene particles on a prism surface. Since the radiation pressure transferred laterally from the evanescent wave is negated on both sides, particles can be stably aligned. By projecting a circular and a linear beam spot onto the interface, both multiple and single arrays of particles are achieved. Arrays of particles trapped on the interface can be easily moved adjusting the intensity of incident beams on either side. We also simulate electromagnetic distribution of scattering light that is converted from the evanescent wave using the FDTD method. The results show that scattering light converts from an evanescent wave propagating through a particle array and has a distance longer than that propagating from a normal evanescent wave.     

药品电子身份证10月亮相

2008年10月31日后，包括血液制品在内的4类药品将首批获得统一的监管码，即电子身份证。一种既有利于生产企业防伪打假、开展销售和市场管理，又方便监管部门监管、方便消费者查询产品真伪的药品电子标签—全国统一的药品监管码，将分类分批地在所有药品中实施，此举标志着我国药品“电子身份证”制度正在逐步建立。     

一种准确测量吸光度的校正方法

分光光度法是一种经典的分析方法。如何准确地测量配合物的吸光度是这一方法的关键问题。当试剂在测量波长处有吸收时，传统的那种以试剂空白为参比的测量方法所测得的实际上不是配合物的吸光度。试剂在这个波长处的吸收愈强，则这种偏差也就愈大。本文提出