从高效蓝光二极管到激光照明

 我来自日本,出生于伊方町,毕业于德岛大学,这是当地一家非常小的大学,并不像北京大学、清华大学这么有名。大学毕业之后,我加入一家只有100名员工的公司。我负责蓝色发光二极管（LED）研发方面的工作,这项工作非常有意思。在研发过程中,我们没有和其他公司、机构或大学合作,完全是独立进行研发。也就是说,所有的发明都是我们自己做的。我发明蓝光LED后去了美国,公司过去没有与其他的学术机构有过任何的合作。整个亚洲国家都有同样的问题,虽然有很多的大学毕业生,但当学生毕业后加入企业做研发时并不是很顺利。     

Adaptation of photoperiodic control pathways produces short-day flowering in rice

The photoperiodic control of flowering is one of the important developmental processes of plants because it is directly related to successful reproduction. Although the molecular genetic analysis of Arabidopsis thaliana, a long-day (LD) plant, has provided models to explain the control of flowering time in this species, very little is known about its molecular mechanisms for short-day (SD) plants. Here we show how the photoperiodic control of flowering is regulated in rice, a SD plant. Overexpression of OsGI, an orthologue of the Arabidopsis GIGANTEA (GI) gene in transgenic rice, caused late flowering under both SD and LD conditions. Expression of the rice orthologue of the Arabidopsis CONSTANS (CO) gene was increased in the transgenic rice, whereas expression of the rice orthologue of FLOWERING LOCUS T (FT) was suppressed. Our results indicate that three key regulatory genes for the photoperiodic control of flowering are conserved between Arabidopsis, a LD plant, and rice, a SD plant, but regulation of the FT gene by CO was reversed, resulting in the suppression of flowering in rice under LD conditions.     

双棱镜测光波长实验的改进

本文对用双棱镜测定光波长的实验提出了两种新的能较明显地提高实验精度的测量方法。并对《物理实验》杂志上有关这方面的两篇文章进行了补充和改进。     

E.赫克特《光学》插图中的一个错误

本文指出了E.赫克特等所著的《光学》上册插图中的一个错误,这只图目前已被国内某些书籍所引用.而且在有关的作图中也存在着类似的现象.     

乙丙嵌段共聚物结构与性能的关系

用＾１３Ｃ－ＮＭＲ，Ｘ射线衍射，ＤＳＣＴ，ＤＭＡ技术，可不同批次的乙丙嵌段共聚物进行了表征，发现它们的分子链是以长的乙烯，丙烯链为主，并含有其它序列结构，而各样品的序列分布不同，显示出不同的物理性质，在此基础上讨论了其结构与性能之间的关系。     

Enantiospecific electrodeposition of a chiral catalyst

Many biomolecules are chiral--they can exist in one of two enantiomeric forms that only differ in that their structures are mirror images of each other. Because only one enantiomer tends to be physiologically active while the other is inactive or even toxic, drug compounds are increasingly produced in an enantiomerically pure form using solution-phase homogeneous catalysts and enzymes. Chiral surfaces offer the possibility of developing heterogeneous enantioselective catalysts that can more readily be separated from the products and reused. In addition, such surfaces might serve as electrochemical sensors for chiral molecules. To date, chiral surfaces have been obtained by adsorbing chiral molecules or slicing single crystals so that they exhibit high-index faces, and some of these surfaces act as enantioselective heterogeneous catalysts. Here we show that chiral surfaces can also be produced through electrodeposition, a relatively simple solution-based process that resembles biomineralization in that organic molecules adsorbed on surfaces have profound effects on the morphology of the inorganic deposits. When electrodepositing a copper oxide film on an achiral gold surface in the presence of tartrate ion in the deposition solution, the chirality of the ion determines the chirality of the deposited film, which in turn determines the film's enantiospecificity during subsequent electrochemical oxidation reactions.     

基于Internet的DOL教材信息发现和收集Agent

介绍一个基于多Ａｇｅｎｔ（ｍｕｌｔｉ－ａｇｅｎｔ）体系结构的信息检索系统：ＤＯＬＴＲＩ－Ａｇｅｎｔ．ＤＯＬＴＲＩ－Ａｇｅｎｔ用于从Ｉｎｔｅｒｎｅｔ上发现和收集用于远程开放教学（ＤｉｓｔａｎｃｅａｎｄＯｐｅｎＬｅａｒｎｉｎｇ,简称ＤＯＬ）中进行教材设计的教材信息．ＤＯＬＴＲＩ－Ａｇｅｎｔ根据用户需要和任务模型主动、智能和协作地搜索Ｉｎｔｅｒｎｅｔ上的各种信息资源（如数据库,ＷＷＷ服务器等）,对搜集到的教材信息归类存储,实时地更新本地教材信息库以与外部信息源保持动态一致．它还接收Ｉｎｔｅｒｎｅｔ信息空间中其他教材信息搜集Ａｇｅｎｔ和其他类型Ａｇｅｎｔ的服务请求,开放地与其他Ａｇｅｎｔ进行互操作,实现信息共享和交流     

Occurrence of perfluoroalkyl acids in precipitation from Shenyang, China

Perfluorosulfonates （PFSAs） and perfluorocarboxylates （PFCAs） in precipitation collected from Shenyang, China were determined. Snow samples were collected in the snow event on March 4, 2007 from 34 sites involving both the urban and suburban areas in Shenyang. The snowmelt was preconcentrated by solid phase extraction and analyzed using LC-MS method. Measurable amounts of perfluoroalkyl acids （PFAS） were found in precipitation samples from Shenyang, demonstrating that wet deposition is one possible pathway for the removing of the selected PFAS chemicals from atmosphere. Major PFAS detected were PFOS （〈0.38-51 ng/L）, PFOA （0.82-13 ng/L） and PFHpA （0.76-11 ng/L）, with their mean concentration of 5.4, 3.3 and 2.9 ng/L, respectively. Other PFSAs and PFCAs were detected at much lower frequency or below the limit of detection in all the samples. The work presented here offers some basis for the investigation on the environmental behavior and the evaluation of human exposure to PFAS.     

菲涅耳半波带法公式A_K＝（a_1）／2±（a_k）／2中K值的范围

本文对在点光源照明情况下，用菲涅耳半波带法求考察点Ｐ合振幅的近似公式Ａｋ＝ａ１／２±ａｋ／２中Ｋ值的适用范围进行了讨论，纠正了某些光学书籍中对Ｋ值范围加以限制的结论．     

Fabrication of the beam splitters for soft X-ray laser application

The electron densities of a laser-produced plasma near the critical surface can be measured by using soft X-ray laser interferometry because the soft X-ray laser has shorter wavelength, higher brightness and better coher-ence and so on. It has obvious dominance in the experi-mental research of diagnosing the distribution of electron densities in a laser-produced plasma. The experimental results can not only give the information correlated with plasmas, which cannot be described accurately in t…