光学偶极俘获及单量子测量

对目前的腔QED系统实现强耦合的条件进行了讨论.主要内容包括:获得强耦合的一般条件,我们目前的可能达到的最好结果分析:不同腔组合可能达到的参数,与量子点、光子晶体、纳米腔以及微球腔QED的比较;单原子(单光子)测量的基本过程:单原子辐射的基本特点,非经典性的测量,包括差拍测量,光子统计特性的分析.不同单光子量子态(或多光子量子态)在采用HBT实验测量中的修正等问题.对热光和相干光的初步实验对比证实了理论模型.原子操控的进展:铯原子光学偶极俘获,最近的实验结果,利用CCD荧光探测对偶极阱的测量结果.     

A FULL QUANTUM THEORY OF THE THREE-MODE INTERACTIONS INSIDE AN OPO CAVITY

A full quantum treatment about the process of parametric down-conversion with frequency degenerate but polarization pon-degenerate in an optical parametric oscillator (OPO) cavity is presented. Using the linearized Langevin equations and spectral matrix, we calculated the squeezing spectra of the coupled mode in the output field. The squeezing as a function of driving field and detection frequency is obtained. The resuits obtained, which are compared with those found semiclassically by Reynaud et al., indicate that it is possible to generate a two-mode coherent squeezed state with large amplitude. The quantum correlation between the signal and the idler modes is also discussed. It is shown that there is an inseparable relationship between the two-mode squeezing and the intermode quantum correlation.     

β-酰胺乙基(或α-甲基乙基)锗倍半氧化物的合成、结构及抗癌作用

醋酸三烷基锗及β-羧乙基锗倍半氧化物(Ge-132)有抑菌及抗癌作用。Ge-132的某些衍生物具有更强的抗癌活性。本文报道8种酰胺衍生物的合成,它们的光谱、质谱及热分解性质和部分衍生物的抗癌活性。     

木材表面改性的XPS分析

利用微波等离子体对木材表面进行处理，并诱导引发接枝甲基丙烯酸甲酯；达到表面改性的效果以提高木质材料的性能，利用X射线光电子能谱(XPS)对木材表面改性前后的表面化学结构进行分析；结果表明：木材经微波等离子体处理，表面氧与碳的原子浓度比(no／nc)增加，产生大量的含氧官能团或过氧化物，从而引发木材与甲基丙烯甲酯单体产生接枝共聚反应。     

盐酸芦氟沙星的荧光光谱分析法研究

研究了β-环糊精、表面活性剂、缓冲溶液及pH值、表面活性剂等对芦氟沙星荧光强度的影响。提出了用荧光光谱法测定芦氟沙星含量的新方法。该法操作简便，检出限低，用于实际样品分析，结果满意。     

微波萃取/催化-紫外光度法快速测定2,6-二(叔丁基)-4-甲基苯酚

采用微波萃取，催化技术，改进了喷气燃料中抗氧剂2，6－二（叔丁基）－4－甲基苯酚的测定方法，使整个试验时间由原来的2h缩短到20min左右，克服了常规水浴回流法萃取时间长的缺点，实现了快速检测，在0．6－3．0mg.L^-1的测定范围内，相对标准偏差小于3％，回收率在94．9％－99．9％，同时有利于降低能耗。     

青海野生抱茎獐牙菜中矿物质元素含量特征

为了对比分析青海不同地区野生抱茎獐牙菜中微量元素含量,采集花期抱茎獐牙菜全植株,采用原子吸收光谱仪分析了其铜、锌、铁、锰、钴、镍等元素含量。结果表明,不同地区野生抱茎獐牙菜中微量元素含量的变化可能与采样时间有关。     

Experimental Study of a Photocatalytic Reactor for Trace Formaldehyde Removal

Formaldehyde is the key contaminant influencing building occupants＇ health in indoor environment. In order to reduce occupants＇ exposures to formaldehyde, a newly designed photocatalytic reactor was applied in a dynamic HVAC （heating, ventilation and air conditioning） system. The experiments were carried out for the removal of formaldehyde present in air at low parts per million （ppm） concentrations. The initial formaldehyde concentrations were set as 1.59 ppm and 0.27 ppm respectively, based on the formaldehyde levels in the polluted places. Experimental results show that the photocatalytic reactor is effective on formaldehyde photodegradation, causes a low pressure drop, and does not make the second pollution of ozone. The kinetic anaiysis indicates that the kinetics for oxidation processes can be fitted well by a pseudo-first-order kinetic model deduced from Langmuir - Hinshelwood （L-H） model.